java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/down.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:20:25,740 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:20:25,742 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:20:25,753 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-09-26 21:20:25,799 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-26 21:20:25,830 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:20:25,831 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:20:25,832 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:20:25,832 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:20:25,833 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:20:25,833 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:20:25,833 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:20:25,833 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:20:25,834 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:20:25,834 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:20:25,834 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:20:25,834 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:20:25,834 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:20:25,834 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:20:25,835 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:20:25,835 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:20:25,835 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:20:25,835 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:20:25,835 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:20:25,836 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:20:25,836 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:20:25,836 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:20:25,836 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:20:25,836 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:20:25,837 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:20:25,837 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:20:25,837 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:20:25,837 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:20:25,837 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:20:25,837 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:20:25,882 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:20:25,899 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:20:25,906 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:20:25,907 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:20:25,908 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:20:25,909 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/down.i_4.bpl [2018-09-26 21:20:25,909 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/down.i_4.bpl' [2018-09-26 21:20:25,962 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:20:25,965 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:20:25,966 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:20:25,966 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:20:25,967 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:20:25,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:25" (1/1) ... [2018-09-26 21:20:26,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:25" (1/1) ... [2018-09-26 21:20:26,008 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:20:26,009 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:20:26,009 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:20:26,009 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:20:26,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:25" (1/1) ... [2018-09-26 21:20:26,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:25" (1/1) ... [2018-09-26 21:20:26,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:25" (1/1) ... [2018-09-26 21:20:26,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:25" (1/1) ... [2018-09-26 21:20:26,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:25" (1/1) ... [2018-09-26 21:20:26,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:25" (1/1) ... [2018-09-26 21:20:26,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:25" (1/1) ... [2018-09-26 21:20:26,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:20:26,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:20:26,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:20:26,033 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:20:26,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:25" (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 21:20:26,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-26 21:20:26,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-26 21:20:26,385 INFO L346 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-26 21:20:26,386 INFO L202 PluginConnector]: Adding new model down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:20:26 BoogieIcfgContainer [2018-09-26 21:20:26,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:20:26,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:20:26,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:20:26,391 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:20:26,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:20:25" (1/2) ... [2018-09-26 21:20:26,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ad88ab9 and model type down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:20:26, skipping insertion in model container [2018-09-26 21:20:26,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:20:26" (2/2) ... [2018-09-26 21:20:26,395 INFO L112 eAbstractionObserver]: Analyzing ICFG down.i_4.bpl [2018-09-26 21:20:26,405 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:20:26,414 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:20:26,467 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:20:26,468 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:20:26,468 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:20:26,468 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:20:26,468 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:20:26,468 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:20:26,469 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:20:26,469 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:20:26,469 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:20:26,485 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-09-26 21:20:26,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:20:26,492 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:26,493 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-26 21:20:26,494 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:26,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:26,501 INFO L82 PathProgramCache]: Analyzing trace with hash 889539593, now seen corresponding path program 1 times [2018-09-26 21:20:26,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:26,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:26,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:26,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:26,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:26,733 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 21:20:26,736 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:20:26,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-26 21:20:26,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-26 21:20:26,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-26 21:20:26,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-26 21:20:26,754 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-09-26 21:20:26,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:26,981 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2018-09-26 21:20:26,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:20:26,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-26 21:20:26,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:26,993 INFO L225 Difference]: With dead ends: 16 [2018-09-26 21:20:26,993 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 21:20:26,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:20:27,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 21:20:27,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-26 21:20:27,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:20:27,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-26 21:20:27,031 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-09-26 21:20:27,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:27,031 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-26 21:20:27,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-26 21:20:27,031 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-26 21:20:27,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:20:27,032 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:27,032 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:20:27,033 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:27,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:27,033 INFO L82 PathProgramCache]: Analyzing trace with hash 198622019, now seen corresponding path program 1 times [2018-09-26 21:20:27,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:27,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:27,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:27,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:27,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:27,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:27,121 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:20:27,121 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-26 21:20:27,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:20:27,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:20:27,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-09-26 21:20:27,124 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-09-26 21:20:27,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:27,232 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-09-26 21:20:27,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:20:27,233 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-26 21:20:27,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:27,234 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:20:27,234 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:20:27,236 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-09-26 21:20:27,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:20:27,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-09-26 21:20:27,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:20:27,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-26 21:20:27,240 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-26 21:20:27,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:27,241 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-26 21:20:27,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:20:27,241 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-26 21:20:27,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:20:27,242 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:27,242 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-26 21:20:27,242 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:27,243 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:27,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1897132479, now seen corresponding path program 1 times [2018-09-26 21:20:27,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:27,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:27,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:27,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:27,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:27,379 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:27,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:20:27,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:27,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:27,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:27,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:27,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-26 21:20:27,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:20:27,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:20:27,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-26 21:20:27,481 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2018-09-26 21:20:27,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:27,681 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-09-26 21:20:27,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:20:27,682 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-26 21:20:27,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:27,683 INFO L225 Difference]: With dead ends: 20 [2018-09-26 21:20:27,683 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:20:27,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:20:27,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:20:27,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:20:27,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:20:27,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-09-26 21:20:27,688 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-09-26 21:20:27,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:27,689 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-09-26 21:20:27,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:20:27,689 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-09-26 21:20:27,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:20:27,690 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:27,690 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-09-26 21:20:27,690 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:27,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:27,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1765329927, now seen corresponding path program 2 times [2018-09-26 21:20:27,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:27,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:27,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:27,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:27,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:27,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:27,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:27,956 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 21:20:27,967 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:27,998 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:27,998 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:28,000 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:28,083 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:28,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-09-26 21:20:28,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:20:28,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:20:28,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:20:28,085 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-09-26 21:20:28,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:28,308 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-09-26 21:20:28,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:20:28,309 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-09-26 21:20:28,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:28,310 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:20:28,310 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:20:28,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:20:28,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:20:28,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-09-26 21:20:28,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:20:28,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-09-26 21:20:28,317 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-09-26 21:20:28,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:28,317 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-09-26 21:20:28,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:20:28,317 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-09-26 21:20:28,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:20:28,318 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:28,318 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-09-26 21:20:28,319 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:28,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:28,319 INFO L82 PathProgramCache]: Analyzing trace with hash 29955317, now seen corresponding path program 3 times [2018-09-26 21:20:28,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:28,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:28,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:28,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:28,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:28,437 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:28,438 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 21:20:28,452 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:28,480 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-26 21:20:28,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:28,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:28,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:28,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-26 21:20:28,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:20:28,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:20:28,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-26 21:20:28,526 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-09-26 21:20:28,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:28,774 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-09-26 21:20:28,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:20:28,774 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-26 21:20:28,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:28,775 INFO L225 Difference]: With dead ends: 26 [2018-09-26 21:20:28,775 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:20:28,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:20:28,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:20:28,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-26 21:20:28,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 21:20:28,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-09-26 21:20:28,781 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-09-26 21:20:28,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:28,781 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-09-26 21:20:28,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:20:28,781 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-09-26 21:20:28,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:20:28,782 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:28,782 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2018-09-26 21:20:28,783 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:28,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:28,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1153652177, now seen corresponding path program 4 times [2018-09-26 21:20:28,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:28,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:28,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:28,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:28,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:29,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:29,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:29,051 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 21:20:29,061 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:29,075 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:29,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:29,077 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:29,122 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:29,123 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-09-26 21:20:29,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:20:29,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:20:29,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-09-26 21:20:29,124 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-09-26 21:20:29,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:29,259 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-09-26 21:20:29,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:20:29,260 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-26 21:20:29,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:29,261 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:20:29,261 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:20:29,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:20:29,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:20:29,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-09-26 21:20:29,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:20:29,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-09-26 21:20:29,269 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-09-26 21:20:29,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:29,270 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-09-26 21:20:29,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:20:29,270 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-09-26 21:20:29,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:20:29,271 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:29,271 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-09-26 21:20:29,271 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:29,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:29,272 INFO L82 PathProgramCache]: Analyzing trace with hash -558246485, now seen corresponding path program 5 times [2018-09-26 21:20:29,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:29,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:29,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:29,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:29,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:29,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:29,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:29,422 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 21:20:29,430 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:29,451 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-26 21:20:29,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:29,457 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:29,490 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:29,490 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-26 21:20:29,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:20:29,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:20:29,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:20:29,492 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 10 states. [2018-09-26 21:20:29,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:29,641 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-09-26 21:20:29,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:20:29,641 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-26 21:20:29,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:29,642 INFO L225 Difference]: With dead ends: 32 [2018-09-26 21:20:29,643 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:20:29,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:20:29,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:20:29,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:20:29,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:20:29,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-09-26 21:20:29,648 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-09-26 21:20:29,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:29,649 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-09-26 21:20:29,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:20:29,649 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-09-26 21:20:29,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:20:29,650 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:29,650 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-09-26 21:20:29,650 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:29,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:29,651 INFO L82 PathProgramCache]: Analyzing trace with hash -578011675, now seen corresponding path program 6 times [2018-09-26 21:20:29,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:29,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:29,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:29,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:29,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:29,823 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:29,823 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 21:20:29,840 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:29,895 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-26 21:20:29,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:29,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:30,094 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:30,095 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-09-26 21:20:30,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:20:30,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:20:30,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-09-26 21:20:30,096 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-09-26 21:20:30,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:30,253 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-09-26 21:20:30,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:20:30,253 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-09-26 21:20:30,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:30,254 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:20:30,255 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:20:30,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:20:30,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:20:30,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-09-26 21:20:30,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:20:30,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-09-26 21:20:30,263 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-09-26 21:20:30,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:30,263 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-09-26 21:20:30,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:20:30,263 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-09-26 21:20:30,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:20:30,264 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:30,264 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-09-26 21:20:30,265 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:30,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:30,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1418505247, now seen corresponding path program 7 times [2018-09-26 21:20:30,265 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:30,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:30,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:30,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:30,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:30,407 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:30,408 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:30,408 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 21:20:30,416 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:30,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:30,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:30,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-26 21:20:30,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:20:30,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:20:30,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:20:30,466 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2018-09-26 21:20:30,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:30,625 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-09-26 21:20:30,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:20:30,626 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-26 21:20:30,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:30,626 INFO L225 Difference]: With dead ends: 38 [2018-09-26 21:20:30,626 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:20:30,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:20:30,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:20:30,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-26 21:20:30,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:20:30,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-09-26 21:20:30,633 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-09-26 21:20:30,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:30,633 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-09-26 21:20:30,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:20:30,634 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-09-26 21:20:30,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:20:30,634 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:30,635 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-09-26 21:20:30,635 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:30,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:30,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1375531237, now seen corresponding path program 8 times [2018-09-26 21:20:30,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:30,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:30,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:30,637 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:30,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:30,788 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:30,788 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 21:20:30,800 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:30,819 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:30,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:30,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:30,878 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:30,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-09-26 21:20:30,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:20:30,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:20:30,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2018-09-26 21:20:30,879 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2018-09-26 21:20:31,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:31,164 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-09-26 21:20:31,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:20:31,167 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-09-26 21:20:31,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:31,168 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:20:31,168 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:20:31,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:20:31,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:20:31,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-09-26 21:20:31,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 21:20:31,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-09-26 21:20:31,179 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-09-26 21:20:31,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:31,179 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-09-26 21:20:31,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:20:31,180 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-09-26 21:20:31,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:20:31,181 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:31,181 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-09-26 21:20:31,181 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:31,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:31,182 INFO L82 PathProgramCache]: Analyzing trace with hash 964341655, now seen corresponding path program 9 times [2018-09-26 21:20:31,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:31,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:31,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:31,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:31,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:31,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:31,501 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 21:20:31,509 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:31,553 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:20:31,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:31,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:31,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:31,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-26 21:20:31,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:20:31,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:20:31,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:20:31,607 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2018-09-26 21:20:31,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:31,823 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-09-26 21:20:31,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:20:31,824 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-26 21:20:31,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:31,824 INFO L225 Difference]: With dead ends: 44 [2018-09-26 21:20:31,825 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:20:31,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:20:31,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:20:31,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 21:20:31,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:20:31,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-09-26 21:20:31,831 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-09-26 21:20:31,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:31,832 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-09-26 21:20:31,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:20:31,832 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-09-26 21:20:31,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:20:31,833 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:31,833 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-09-26 21:20:31,833 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:31,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:31,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1427751471, now seen corresponding path program 10 times [2018-09-26 21:20:31,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:31,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:31,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:31,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:31,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:31,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:32,268 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:32,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:32,268 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 21:20:32,278 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:32,316 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:32,317 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:32,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:32,385 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:32,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-09-26 21:20:32,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:20:32,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:20:32,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-09-26 21:20:32,387 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-09-26 21:20:32,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:32,595 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-09-26 21:20:32,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:20:32,600 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-09-26 21:20:32,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:32,601 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:20:32,601 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:20:32,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:20:32,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:20:32,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-09-26 21:20:32,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:20:32,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-09-26 21:20:32,615 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-09-26 21:20:32,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:32,615 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-09-26 21:20:32,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:20:32,616 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-09-26 21:20:32,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 21:20:32,616 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:32,616 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-09-26 21:20:32,617 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:32,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:32,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1974662963, now seen corresponding path program 11 times [2018-09-26 21:20:32,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:32,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:32,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:32,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:32,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:32,925 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:32,925 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 21:20:32,933 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:32,985 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:20:32,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:32,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:33,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:33,041 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-26 21:20:33,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:20:33,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:20:33,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:20:33,042 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states. [2018-09-26 21:20:33,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:33,838 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-09-26 21:20:33,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:20:33,838 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-26 21:20:33,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:33,839 INFO L225 Difference]: With dead ends: 50 [2018-09-26 21:20:33,839 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:20:33,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:20:33,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:20:33,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-26 21:20:33,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-26 21:20:33,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-09-26 21:20:33,847 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-09-26 21:20:33,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:33,847 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-09-26 21:20:33,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:20:33,848 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-09-26 21:20:33,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:20:33,848 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:33,848 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-09-26 21:20:33,849 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:33,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:33,849 INFO L82 PathProgramCache]: Analyzing trace with hash 577956359, now seen corresponding path program 12 times [2018-09-26 21:20:33,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:33,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:33,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:33,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:33,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:34,139 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:34,139 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 21:20:34,149 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:34,264 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-09-26 21:20:34,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:34,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:34,335 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:34,355 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:34,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-09-26 21:20:34,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:20:34,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:20:34,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-09-26 21:20:34,357 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-09-26 21:20:34,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:34,507 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-09-26 21:20:34,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:20:34,508 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-09-26 21:20:34,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:34,509 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:20:34,510 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:20:34,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:20:34,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:20:34,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-09-26 21:20:34,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:20:34,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-09-26 21:20:34,517 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-09-26 21:20:34,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:34,518 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-09-26 21:20:34,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:20:34,518 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-09-26 21:20:34,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:20:34,518 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:34,519 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-09-26 21:20:34,519 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:34,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:34,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1365213059, now seen corresponding path program 13 times [2018-09-26 21:20:34,519 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:34,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:34,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:34,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:34,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:34,711 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:34,711 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 21:20:34,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:34,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:34,737 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:34,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:34,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-26 21:20:34,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:20:34,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:20:34,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:20:34,774 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 18 states. [2018-09-26 21:20:35,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:35,542 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-09-26 21:20:35,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:20:35,543 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-26 21:20:35,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:35,543 INFO L225 Difference]: With dead ends: 56 [2018-09-26 21:20:35,543 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:20:35,544 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:20:35,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:20:35,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-26 21:20:35,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-26 21:20:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-09-26 21:20:35,550 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-09-26 21:20:35,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:35,550 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-09-26 21:20:35,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:20:35,551 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-09-26 21:20:35,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-26 21:20:35,551 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:35,551 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-09-26 21:20:35,552 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:35,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:35,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1260506179, now seen corresponding path program 14 times [2018-09-26 21:20:35,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:35,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:35,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:35,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:35,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:35,705 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:35,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:35,705 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 21:20:35,715 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:35,747 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:35,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:35,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:35,839 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:35,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:35,861 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-09-26 21:20:35,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:20:35,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:20:35,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2018-09-26 21:20:35,862 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-09-26 21:20:36,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:36,016 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-09-26 21:20:36,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:20:36,017 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-09-26 21:20:36,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:36,018 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:20:36,018 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:20:36,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=317, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:20:36,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:20:36,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-09-26 21:20:36,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-26 21:20:36,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-09-26 21:20:36,027 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-09-26 21:20:36,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:36,027 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-09-26 21:20:36,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:20:36,027 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-09-26 21:20:36,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:20:36,028 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:36,028 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-09-26 21:20:36,028 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:36,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:36,029 INFO L82 PathProgramCache]: Analyzing trace with hash -165727303, now seen corresponding path program 15 times [2018-09-26 21:20:36,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:36,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:36,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:36,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:36,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:36,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:36,347 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:20:36,358 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:36,391 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:20:36,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:36,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:36,405 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:36,426 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:36,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-26 21:20:36,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:20:36,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:20:36,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:20:36,427 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 20 states. [2018-09-26 21:20:36,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:36,741 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-09-26 21:20:36,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:20:36,742 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-26 21:20:36,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:36,742 INFO L225 Difference]: With dead ends: 62 [2018-09-26 21:20:36,742 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:20:36,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:20:36,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:20:36,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:20:36,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:20:36,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-09-26 21:20:36,750 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-09-26 21:20:36,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:36,751 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-09-26 21:20:36,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:20:36,751 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-09-26 21:20:36,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:20:36,751 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:36,752 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-09-26 21:20:36,752 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:36,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:36,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1448426227, now seen corresponding path program 16 times [2018-09-26 21:20:36,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:36,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:36,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:36,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:36,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:36,917 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:36,917 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 21:20:36,924 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:36,948 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:36,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:36,951 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:37,017 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:37,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-09-26 21:20:37,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:20:37,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:20:37,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2018-09-26 21:20:37,018 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-09-26 21:20:37,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:37,228 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-09-26 21:20:37,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:20:37,228 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-09-26 21:20:37,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:37,229 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:20:37,229 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:20:37,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:20:37,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:20:37,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-09-26 21:20:37,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-26 21:20:37,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-09-26 21:20:37,237 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-09-26 21:20:37,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:37,237 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-09-26 21:20:37,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:20:37,238 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-09-26 21:20:37,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:20:37,238 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:37,238 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-09-26 21:20:37,239 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:37,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:37,239 INFO L82 PathProgramCache]: Analyzing trace with hash 368133487, now seen corresponding path program 17 times [2018-09-26 21:20:37,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:37,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:37,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:37,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:37,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:37,603 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:37,603 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:37,603 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 21:20:37,611 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:37,637 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-26 21:20:37,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:37,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:37,668 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:37,668 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-26 21:20:37,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:20:37,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:20:37,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:20:37,669 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 22 states. [2018-09-26 21:20:38,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:38,332 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-09-26 21:20:38,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:20:38,332 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-26 21:20:38,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:38,333 INFO L225 Difference]: With dead ends: 68 [2018-09-26 21:20:38,333 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:20:38,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=731, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:20:38,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:20:38,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-26 21:20:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:20:38,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-09-26 21:20:38,343 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-09-26 21:20:38,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:38,343 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-09-26 21:20:38,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:20:38,344 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-09-26 21:20:38,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:20:38,344 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:38,345 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-09-26 21:20:38,345 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:38,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:38,345 INFO L82 PathProgramCache]: Analyzing trace with hash -788717655, now seen corresponding path program 18 times [2018-09-26 21:20:38,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:38,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:38,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:38,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:38,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:38,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:38,712 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 21:20:38,728 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:38,802 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-09-26 21:20:38,802 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:38,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:39,080 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:39,080 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-09-26 21:20:39,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:20:39,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:20:39,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2018-09-26 21:20:39,082 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-09-26 21:20:39,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:39,424 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-09-26 21:20:39,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:20:39,425 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-09-26 21:20:39,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:39,426 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:20:39,426 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:20:39,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=440, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:20:39,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:20:39,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-09-26 21:20:39,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-26 21:20:39,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-09-26 21:20:39,436 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-09-26 21:20:39,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:39,436 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-09-26 21:20:39,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:20:39,436 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-09-26 21:20:39,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-26 21:20:39,437 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:39,437 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-09-26 21:20:39,437 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:39,437 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:39,437 INFO L82 PathProgramCache]: Analyzing trace with hash -2043489115, now seen corresponding path program 19 times [2018-09-26 21:20:39,437 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:39,438 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:39,438 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:39,438 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:39,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:40,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:40,345 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 21:20:40,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:40,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:40,425 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:40,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-26 21:20:40,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:20:40,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:20:40,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:20:40,426 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 24 states. [2018-09-26 21:20:40,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:40,878 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-09-26 21:20:40,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:20:40,878 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-26 21:20:40,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:40,879 INFO L225 Difference]: With dead ends: 74 [2018-09-26 21:20:40,879 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:20:40,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:20:40,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:20:40,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-26 21:20:40,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-26 21:20:40,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-09-26 21:20:40,888 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-09-26 21:20:40,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:40,888 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-09-26 21:20:40,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:20:40,888 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-09-26 21:20:40,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:20:40,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:40,889 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-09-26 21:20:40,889 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:40,889 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:40,890 INFO L82 PathProgramCache]: Analyzing trace with hash -957152801, now seen corresponding path program 20 times [2018-09-26 21:20:40,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:40,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:40,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:40,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:40,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:42,127 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:42,127 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 21:20:42,136 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:42,163 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:42,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:42,165 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:42,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:42,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-09-26 21:20:42,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:20:42,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:20:42,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=162, Unknown=0, NotChecked=0, Total=272 [2018-09-26 21:20:42,251 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2018-09-26 21:20:42,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:42,663 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-09-26 21:20:42,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:20:42,665 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2018-09-26 21:20:42,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:42,666 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:20:42,666 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:20:42,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=303, Invalid=509, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:20:42,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:20:42,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-09-26 21:20:42,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:20:42,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-09-26 21:20:42,675 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-09-26 21:20:42,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:42,676 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-09-26 21:20:42,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:20:42,676 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-09-26 21:20:42,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-26 21:20:42,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:42,676 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-09-26 21:20:42,677 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:42,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:42,677 INFO L82 PathProgramCache]: Analyzing trace with hash -700907173, now seen corresponding path program 21 times [2018-09-26 21:20:42,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:42,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:42,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:42,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:42,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:43,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:43,064 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 21:20:43,081 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:43,112 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-26 21:20:43,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:43,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:43,149 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:43,149 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-26 21:20:43,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:20:43,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:20:43,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:20:43,150 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 26 states. [2018-09-26 21:20:43,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:43,564 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-09-26 21:20:43,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:20:43,564 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-26 21:20:43,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:43,565 INFO L225 Difference]: With dead ends: 80 [2018-09-26 21:20:43,565 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:20:43,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:20:43,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:20:43,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-26 21:20:43,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-26 21:20:43,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-09-26 21:20:43,573 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-09-26 21:20:43,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:43,573 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-09-26 21:20:43,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:20:43,574 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-09-26 21:20:43,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:20:43,574 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:43,574 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-09-26 21:20:43,575 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:43,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:43,575 INFO L82 PathProgramCache]: Analyzing trace with hash 877396373, now seen corresponding path program 22 times [2018-09-26 21:20:43,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:43,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:43,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:43,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:43,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:43,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:43,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:20:43,817 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:43,848 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:43,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:43,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:43,926 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:43,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-09-26 21:20:43,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:20:43,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:20:43,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-26 21:20:43,927 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-09-26 21:20:44,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:44,260 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-09-26 21:20:44,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:20:44,260 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-09-26 21:20:44,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:44,261 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:20:44,261 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:20:44,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=347, Invalid=583, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:20:44,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:20:44,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-09-26 21:20:44,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-26 21:20:44,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-09-26 21:20:44,271 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-09-26 21:20:44,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:44,272 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-09-26 21:20:44,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:20:44,272 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-09-26 21:20:44,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-26 21:20:44,272 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:44,272 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-09-26 21:20:44,273 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:44,273 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:44,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1364257681, now seen corresponding path program 23 times [2018-09-26 21:20:44,273 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:44,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:44,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:44,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:44,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:44,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:44,778 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 21:20:44,788 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:44,831 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-26 21:20:44,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:44,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:44,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:44,864 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-26 21:20:44,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:20:44,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:20:44,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:20:44,865 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 28 states. [2018-09-26 21:20:45,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:45,352 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-09-26 21:20:45,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:20:45,353 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-26 21:20:45,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:45,353 INFO L225 Difference]: With dead ends: 86 [2018-09-26 21:20:45,353 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:20:45,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:20:45,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:20:45,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-26 21:20:45,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-26 21:20:45,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-09-26 21:20:45,363 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-09-26 21:20:45,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:45,363 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-09-26 21:20:45,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:20:45,363 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-09-26 21:20:45,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-26 21:20:45,363 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:45,364 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-09-26 21:20:45,364 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:45,364 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:45,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1897217739, now seen corresponding path program 24 times [2018-09-26 21:20:45,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:45,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:45,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:45,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:45,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:45,630 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:45,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:20:45,638 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:45,686 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-09-26 21:20:45,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:45,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:45,747 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:45,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:45,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-09-26 21:20:45,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:20:45,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:20:45,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-09-26 21:20:45,769 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-09-26 21:20:46,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:46,309 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-09-26 21:20:46,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:20:46,309 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2018-09-26 21:20:46,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:46,310 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:20:46,310 INFO L226 Difference]: Without dead ends: 63 [2018-09-26 21:20:46,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:20:46,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-26 21:20:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-09-26 21:20:46,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:20:46,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-09-26 21:20:46,317 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-09-26 21:20:46,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:46,317 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-09-26 21:20:46,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:20:46,317 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-09-26 21:20:46,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:20:46,318 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:46,318 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-09-26 21:20:46,318 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:46,318 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:46,319 INFO L82 PathProgramCache]: Analyzing trace with hash -2134920377, now seen corresponding path program 25 times [2018-09-26 21:20:46,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:46,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:46,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:46,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:46,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:46,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:46,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:20:46,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:46,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:46,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:46,690 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:46,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:46,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-26 21:20:46,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:20:46,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:20:46,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:20:46,720 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 30 states. [2018-09-26 21:20:47,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:47,541 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-09-26 21:20:47,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:20:47,541 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-26 21:20:47,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:47,542 INFO L225 Difference]: With dead ends: 92 [2018-09-26 21:20:47,542 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:20:47,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:20:47,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:20:47,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-26 21:20:47,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-26 21:20:47,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-09-26 21:20:47,550 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-09-26 21:20:47,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:47,550 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-09-26 21:20:47,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:20:47,550 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-09-26 21:20:47,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-26 21:20:47,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:47,551 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-09-26 21:20:47,551 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:47,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:47,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1286350463, now seen corresponding path program 26 times [2018-09-26 21:20:47,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:47,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:47,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:47,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:47,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:47,972 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:47,972 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:47,972 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 21:20:47,981 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:48,018 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:48,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:48,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:48,087 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:48,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-09-26 21:20:48,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:20:48,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:20:48,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2018-09-26 21:20:48,088 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-09-26 21:20:48,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:48,353 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-09-26 21:20:48,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:20:48,354 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-09-26 21:20:48,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:48,355 INFO L225 Difference]: With dead ends: 69 [2018-09-26 21:20:48,355 INFO L226 Difference]: Without dead ends: 67 [2018-09-26 21:20:48,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:20:48,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-26 21:20:48,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-09-26 21:20:48,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-26 21:20:48,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-09-26 21:20:48,364 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-09-26 21:20:48,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:48,365 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-09-26 21:20:48,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:20:48,365 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-09-26 21:20:48,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:20:48,365 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:48,365 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-09-26 21:20:48,366 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:48,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:48,366 INFO L82 PathProgramCache]: Analyzing trace with hash 767719549, now seen corresponding path program 27 times [2018-09-26 21:20:48,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:48,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:48,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:48,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:48,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:49,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:49,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:20:49,232 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:49,273 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-26 21:20:49,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:49,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:49,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:49,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-26 21:20:49,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:20:49,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:20:49,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:20:49,309 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 32 states. [2018-09-26 21:20:49,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:49,844 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-09-26 21:20:49,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:20:49,844 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-26 21:20:49,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:49,845 INFO L225 Difference]: With dead ends: 98 [2018-09-26 21:20:49,845 INFO L226 Difference]: Without dead ends: 65 [2018-09-26 21:20:49,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=541, Invalid=1621, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:20:49,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-26 21:20:49,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-26 21:20:49,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-26 21:20:49,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-09-26 21:20:49,856 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2018-09-26 21:20:49,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:49,856 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-09-26 21:20:49,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:20:49,857 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-09-26 21:20:49,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-26 21:20:49,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:49,857 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-09-26 21:20:49,857 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:49,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:49,858 INFO L82 PathProgramCache]: Analyzing trace with hash 285536695, now seen corresponding path program 28 times [2018-09-26 21:20:49,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:49,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:49,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:49,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:49,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:50,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:50,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:20:50,581 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:50,618 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:50,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:50,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:50,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:50,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-09-26 21:20:50,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:20:50,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:20:50,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2018-09-26 21:20:50,680 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2018-09-26 21:20:50,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:50,964 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-09-26 21:20:50,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:20:50,964 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2018-09-26 21:20:50,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:50,965 INFO L225 Difference]: With dead ends: 73 [2018-09-26 21:20:50,966 INFO L226 Difference]: Without dead ends: 71 [2018-09-26 21:20:50,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=497, Invalid=835, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:20:50,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-26 21:20:50,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-09-26 21:20:50,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-26 21:20:50,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-09-26 21:20:50,977 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-09-26 21:20:50,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:50,977 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-09-26 21:20:50,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:20:50,977 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-09-26 21:20:50,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-26 21:20:50,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:50,978 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-09-26 21:20:50,978 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:50,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:50,978 INFO L82 PathProgramCache]: Analyzing trace with hash -477209805, now seen corresponding path program 29 times [2018-09-26 21:20:50,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:50,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:50,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:50,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:50,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:51,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:51,576 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 21:20:51,584 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:51,651 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-26 21:20:51,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:51,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:51,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:51,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-26 21:20:51,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:20:51,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:20:51,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:20:51,689 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 34 states. [2018-09-26 21:20:52,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:52,640 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-09-26 21:20:52,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:20:52,640 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-26 21:20:52,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:52,640 INFO L225 Difference]: With dead ends: 104 [2018-09-26 21:20:52,641 INFO L226 Difference]: Without dead ends: 69 [2018-09-26 21:20:52,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=609, Invalid=1841, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:20:52,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-26 21:20:52,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-26 21:20:52,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-26 21:20:52,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-09-26 21:20:52,651 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-09-26 21:20:52,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:52,651 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-09-26 21:20:52,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:20:52,651 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-09-26 21:20:52,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-26 21:20:52,651 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:52,651 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-09-26 21:20:52,652 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:52,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:52,652 INFO L82 PathProgramCache]: Analyzing trace with hash 35497837, now seen corresponding path program 30 times [2018-09-26 21:20:52,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:52,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:52,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:52,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:52,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:52,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:53,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:53,140 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 21:20:53,148 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:20:53,198 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-09-26 21:20:53,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:53,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:53,285 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:53,285 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-09-26 21:20:53,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:20:53,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:20:53,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2018-09-26 21:20:53,286 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-09-26 21:20:53,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:53,588 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-09-26 21:20:53,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:20:53,588 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-09-26 21:20:53,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:53,590 INFO L225 Difference]: With dead ends: 77 [2018-09-26 21:20:53,590 INFO L226 Difference]: Without dead ends: 75 [2018-09-26 21:20:53,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=553, Invalid=929, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:20:53,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-26 21:20:53,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2018-09-26 21:20:53,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-26 21:20:53,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-09-26 21:20:53,600 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2018-09-26 21:20:53,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:53,601 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-09-26 21:20:53,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:20:53,601 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-09-26 21:20:53,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-26 21:20:53,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:53,602 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-09-26 21:20:53,602 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:53,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:53,602 INFO L82 PathProgramCache]: Analyzing trace with hash -246383767, now seen corresponding path program 31 times [2018-09-26 21:20:53,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:53,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:53,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:53,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:53,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:54,640 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:54,640 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 21:20:54,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:54,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:54,695 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:54,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:54,730 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-26 21:20:54,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:20:54,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:20:54,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:20:54,731 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 36 states. [2018-09-26 21:20:55,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:55,535 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-09-26 21:20:55,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:20:55,535 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-26 21:20:55,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:55,536 INFO L225 Difference]: With dead ends: 110 [2018-09-26 21:20:55,536 INFO L226 Difference]: Without dead ends: 73 [2018-09-26 21:20:55,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=681, Invalid=2075, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:20:55,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-26 21:20:55,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-26 21:20:55,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-26 21:20:55,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-09-26 21:20:55,546 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2018-09-26 21:20:55,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:55,547 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-09-26 21:20:55,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:20:55,547 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-09-26 21:20:55,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-26 21:20:55,547 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:55,547 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-09-26 21:20:55,547 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:55,548 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:55,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1653283491, now seen corresponding path program 32 times [2018-09-26 21:20:55,548 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:55,548 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:55,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:55,549 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:20:55,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:56,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:56,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:20:56,036 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:20:56,077 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:20:56,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:56,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:56,108 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:56,129 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:56,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-09-26 21:20:56,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:20:56,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:20:56,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2018-09-26 21:20:56,130 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2018-09-26 21:20:56,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:56,456 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-09-26 21:20:56,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:20:56,456 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2018-09-26 21:20:56,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:56,457 INFO L225 Difference]: With dead ends: 81 [2018-09-26 21:20:56,457 INFO L226 Difference]: Without dead ends: 79 [2018-09-26 21:20:56,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1028, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:20:56,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-26 21:20:56,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-09-26 21:20:56,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-26 21:20:56,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-09-26 21:20:56,469 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-09-26 21:20:56,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:56,470 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-09-26 21:20:56,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:20:56,470 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-09-26 21:20:56,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-26 21:20:56,470 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:56,470 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-09-26 21:20:56,471 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:56,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:56,471 INFO L82 PathProgramCache]: Analyzing trace with hash -332531425, now seen corresponding path program 33 times [2018-09-26 21:20:56,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:56,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:56,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:56,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:56,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:56,960 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:56,960 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 21:20:56,968 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:20:57,021 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-26 21:20:57,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:57,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:57,076 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:57,077 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-26 21:20:57,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:20:57,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:20:57,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:20:57,078 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 38 states. [2018-09-26 21:20:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:58,164 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-09-26 21:20:58,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:20:58,164 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-26 21:20:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:58,165 INFO L225 Difference]: With dead ends: 116 [2018-09-26 21:20:58,165 INFO L226 Difference]: Without dead ends: 77 [2018-09-26 21:20:58,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=757, Invalid=2323, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:20:58,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-26 21:20:58,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-26 21:20:58,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-26 21:20:58,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-09-26 21:20:58,179 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-09-26 21:20:58,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:58,179 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-09-26 21:20:58,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:20:58,179 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-09-26 21:20:58,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-26 21:20:58,180 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:58,180 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-09-26 21:20:58,180 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:58,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:58,181 INFO L82 PathProgramCache]: Analyzing trace with hash -198022311, now seen corresponding path program 34 times [2018-09-26 21:20:58,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:58,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:58,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:58,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:58,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:58,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:58,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:20:58,492 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:20:58,535 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:20:58,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:58,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:58,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:58,590 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-09-26 21:20:58,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:20:58,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:20:58,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2018-09-26 21:20:58,590 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-09-26 21:20:59,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:20:59,013 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-09-26 21:20:59,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:20:59,013 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-09-26 21:20:59,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:20:59,014 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:20:59,014 INFO L226 Difference]: Without dead ends: 83 [2018-09-26 21:20:59,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=674, Invalid=1132, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:20:59,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-26 21:20:59,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-09-26 21:20:59,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-26 21:20:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-09-26 21:20:59,026 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2018-09-26 21:20:59,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:20:59,027 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-09-26 21:20:59,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:20:59,027 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-09-26 21:20:59,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-26 21:20:59,027 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:20:59,027 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-09-26 21:20:59,027 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:20:59,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:20:59,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1320946603, now seen corresponding path program 35 times [2018-09-26 21:20:59,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:20:59,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:20:59,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:59,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:20:59,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:20:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:20:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:59,680 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:20:59,680 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 21:20:59,687 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:20:59,740 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-26 21:20:59,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:20:59,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:20:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:20:59,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:20:59,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-26 21:20:59,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:20:59,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:20:59,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:20:59,774 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 40 states. [2018-09-26 21:21:00,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:00,596 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-09-26 21:21:00,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:21:00,596 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-26 21:21:00,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:00,597 INFO L225 Difference]: With dead ends: 122 [2018-09-26 21:21:00,597 INFO L226 Difference]: Without dead ends: 81 [2018-09-26 21:21:00,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:21:00,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-26 21:21:00,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-26 21:21:00,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-26 21:21:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-09-26 21:21:00,608 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-09-26 21:21:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:00,608 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-09-26 21:21:00,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:21:00,609 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-09-26 21:21:00,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-26 21:21:00,609 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:00,609 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-09-26 21:21:00,609 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:00,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:00,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1626388879, now seen corresponding path program 36 times [2018-09-26 21:21:00,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:00,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:00,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:00,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:00,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:01,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:01,065 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 21:21:01,072 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:01,294 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-09-26 21:21:01,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:01,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:01,342 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:01,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:01,363 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-09-26 21:21:01,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:21:01,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:21:01,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2018-09-26 21:21:01,364 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2018-09-26 21:21:01,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:01,753 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-09-26 21:21:01,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:21:01,753 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-09-26 21:21:01,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:01,754 INFO L225 Difference]: With dead ends: 89 [2018-09-26 21:21:01,754 INFO L226 Difference]: Without dead ends: 87 [2018-09-26 21:21:01,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=739, Invalid=1241, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:21:01,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-26 21:21:01,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2018-09-26 21:21:01,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-26 21:21:01,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-09-26 21:21:01,770 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-09-26 21:21:01,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:01,770 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-09-26 21:21:01,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:21:01,770 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-09-26 21:21:01,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-26 21:21:01,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:01,771 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-09-26 21:21:01,771 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:01,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:01,771 INFO L82 PathProgramCache]: Analyzing trace with hash -408449781, now seen corresponding path program 37 times [2018-09-26 21:21:01,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:01,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:01,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:01,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:01,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:02,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:02,336 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 21:21:02,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:02,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:02,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:02,457 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:02,457 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-26 21:21:02,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:21:02,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:21:02,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:21:02,459 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 42 states. [2018-09-26 21:21:03,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:03,891 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-09-26 21:21:03,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:21:03,892 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-26 21:21:03,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:03,893 INFO L225 Difference]: With dead ends: 128 [2018-09-26 21:21:03,893 INFO L226 Difference]: Without dead ends: 85 [2018-09-26 21:21:03,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=921, Invalid=2861, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:21:03,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-26 21:21:03,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-26 21:21:03,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-26 21:21:03,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-09-26 21:21:03,906 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-09-26 21:21:03,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:03,907 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-09-26 21:21:03,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:21:03,907 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-09-26 21:21:03,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-26 21:21:03,907 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:03,907 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-09-26 21:21:03,907 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:03,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:03,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1130683067, now seen corresponding path program 38 times [2018-09-26 21:21:03,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:03,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:03,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:03,908 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:03,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:04,341 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:04,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:04,348 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:04,396 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:04,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:04,399 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:04,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:04,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-09-26 21:21:04,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:21:04,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:21:04,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2018-09-26 21:21:04,480 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-09-26 21:21:05,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:05,016 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-09-26 21:21:05,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:21:05,017 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-09-26 21:21:05,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:05,018 INFO L225 Difference]: With dead ends: 93 [2018-09-26 21:21:05,018 INFO L226 Difference]: Without dead ends: 91 [2018-09-26 21:21:05,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=807, Invalid=1355, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:21:05,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-26 21:21:05,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-09-26 21:21:05,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-26 21:21:05,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-09-26 21:21:05,032 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-09-26 21:21:05,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:05,033 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-09-26 21:21:05,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:21:05,033 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-09-26 21:21:05,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-26 21:21:05,033 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:05,033 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-09-26 21:21:05,033 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:05,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:05,034 INFO L82 PathProgramCache]: Analyzing trace with hash 40231745, now seen corresponding path program 39 times [2018-09-26 21:21:05,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:05,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:05,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:05,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:05,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:05,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:05,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:05,907 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:05,967 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-26 21:21:05,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:05,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:06,007 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:06,008 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-26 21:21:06,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:21:06,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:21:06,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:21:06,008 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 44 states. [2018-09-26 21:21:06,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:06,997 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-09-26 21:21:06,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:21:06,997 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-26 21:21:06,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:06,998 INFO L225 Difference]: With dead ends: 134 [2018-09-26 21:21:06,998 INFO L226 Difference]: Without dead ends: 89 [2018-09-26 21:21:06,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1009, Invalid=3151, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:21:06,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-26 21:21:07,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-26 21:21:07,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-26 21:21:07,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-09-26 21:21:07,010 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2018-09-26 21:21:07,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:07,010 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-09-26 21:21:07,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:21:07,010 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-09-26 21:21:07,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-26 21:21:07,011 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:07,011 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-09-26 21:21:07,011 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:07,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:07,011 INFO L82 PathProgramCache]: Analyzing trace with hash -2030121349, now seen corresponding path program 40 times [2018-09-26 21:21:07,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:07,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:07,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:07,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:07,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:07,354 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:07,354 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 21:21:07,362 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:07,411 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:07,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:07,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:07,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:07,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-09-26 21:21:07,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:21:07,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:21:07,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2018-09-26 21:21:07,494 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2018-09-26 21:21:07,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:07,985 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-09-26 21:21:07,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:21:07,986 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2018-09-26 21:21:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:07,987 INFO L225 Difference]: With dead ends: 97 [2018-09-26 21:21:07,987 INFO L226 Difference]: Without dead ends: 95 [2018-09-26 21:21:07,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=878, Invalid=1474, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:21:07,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-26 21:21:08,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2018-09-26 21:21:08,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-26 21:21:08,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-09-26 21:21:08,006 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-09-26 21:21:08,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:08,006 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-09-26 21:21:08,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:21:08,007 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-09-26 21:21:08,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-26 21:21:08,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:08,007 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-09-26 21:21:08,007 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:08,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:08,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1031530761, now seen corresponding path program 41 times [2018-09-26 21:21:08,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:08,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:08,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:08,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:08,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:08,800 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:08,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:08,800 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 21:21:08,807 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:08,870 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-26 21:21:08,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:08,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:08,918 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:08,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-26 21:21:08,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:21:08,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:21:08,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:21:08,920 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 46 states. [2018-09-26 21:21:09,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:09,561 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-09-26 21:21:09,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:21:09,561 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-26 21:21:09,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:09,561 INFO L225 Difference]: With dead ends: 140 [2018-09-26 21:21:09,562 INFO L226 Difference]: Without dead ends: 93 [2018-09-26 21:21:09,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1101, Invalid=3455, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:21:09,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-26 21:21:09,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-26 21:21:09,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-26 21:21:09,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-09-26 21:21:09,575 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-09-26 21:21:09,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:09,576 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-09-26 21:21:09,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:21:09,576 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-09-26 21:21:09,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-26 21:21:09,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:09,577 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-09-26 21:21:09,577 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:09,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:09,577 INFO L82 PathProgramCache]: Analyzing trace with hash 769709361, now seen corresponding path program 42 times [2018-09-26 21:21:09,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:09,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:09,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:09,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:09,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:10,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:10,132 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 21:21:10,140 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:10,205 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-09-26 21:21:10,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:10,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:10,277 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:10,278 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-09-26 21:21:10,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:21:10,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:21:10,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2018-09-26 21:21:10,278 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-09-26 21:21:10,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:10,705 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-09-26 21:21:10,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:21:10,705 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-09-26 21:21:10,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:10,705 INFO L225 Difference]: With dead ends: 101 [2018-09-26 21:21:10,706 INFO L226 Difference]: Without dead ends: 99 [2018-09-26 21:21:10,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=952, Invalid=1598, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:21:10,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-26 21:21:10,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-09-26 21:21:10,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-26 21:21:10,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-09-26 21:21:10,720 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2018-09-26 21:21:10,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:10,721 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-09-26 21:21:10,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:21:10,721 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-09-26 21:21:10,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-26 21:21:10,721 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:10,721 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-09-26 21:21:10,721 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:10,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:10,722 INFO L82 PathProgramCache]: Analyzing trace with hash 956254253, now seen corresponding path program 43 times [2018-09-26 21:21:10,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:10,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:10,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:10,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:10,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:11,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:11,537 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:11,537 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 21:21:11,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:11,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:11,640 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:11,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-26 21:21:11,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:21:11,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:21:11,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:21:11,641 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 48 states. [2018-09-26 21:21:12,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:12,759 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-09-26 21:21:12,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:21:12,759 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-26 21:21:12,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:12,760 INFO L225 Difference]: With dead ends: 146 [2018-09-26 21:21:12,760 INFO L226 Difference]: Without dead ends: 97 [2018-09-26 21:21:12,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1197, Invalid=3773, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:21:12,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-26 21:21:12,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-26 21:21:12,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-26 21:21:12,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-09-26 21:21:12,776 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2018-09-26 21:21:12,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:12,776 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-09-26 21:21:12,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:21:12,777 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-09-26 21:21:12,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-26 21:21:12,777 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:12,777 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-09-26 21:21:12,778 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:12,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:12,778 INFO L82 PathProgramCache]: Analyzing trace with hash 251550055, now seen corresponding path program 44 times [2018-09-26 21:21:12,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:12,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:12,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:12,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:12,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:13,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:13,522 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:13,522 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 21:21:13,530 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:13,606 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:13,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:13,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:14,017 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:14,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-09-26 21:21:14,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:21:14,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:21:14,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=456, Unknown=0, NotChecked=0, Total=812 [2018-09-26 21:21:14,018 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2018-09-26 21:21:14,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:14,774 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-09-26 21:21:14,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:21:14,774 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2018-09-26 21:21:14,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:14,775 INFO L225 Difference]: With dead ends: 105 [2018-09-26 21:21:14,775 INFO L226 Difference]: Without dead ends: 103 [2018-09-26 21:21:14,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1029, Invalid=1727, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:21:14,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-26 21:21:14,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-09-26 21:21:14,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-26 21:21:14,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-09-26 21:21:14,791 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-09-26 21:21:14,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:14,791 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-09-26 21:21:14,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:21:14,791 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-09-26 21:21:14,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 21:21:14,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:14,792 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-09-26 21:21:14,792 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:14,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:14,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1221367523, now seen corresponding path program 45 times [2018-09-26 21:21:14,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:14,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:14,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:14,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:14,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:14,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:15,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:15,675 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:15,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:15,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:15,758 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-26 21:21:15,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:15,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:15,811 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:15,812 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-26 21:21:15,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:21:15,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:21:15,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:21:15,813 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 50 states. [2018-09-26 21:21:17,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:17,739 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-09-26 21:21:17,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:21:17,739 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-26 21:21:17,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:17,740 INFO L225 Difference]: With dead ends: 152 [2018-09-26 21:21:17,740 INFO L226 Difference]: Without dead ends: 101 [2018-09-26 21:21:17,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1297, Invalid=4105, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:21:17,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-26 21:21:17,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-26 21:21:17,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 21:21:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-09-26 21:21:17,756 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-09-26 21:21:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:17,756 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-09-26 21:21:17,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:21:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-09-26 21:21:17,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-26 21:21:17,757 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:17,757 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-09-26 21:21:17,757 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:17,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:17,757 INFO L82 PathProgramCache]: Analyzing trace with hash -99845347, now seen corresponding path program 46 times [2018-09-26 21:21:17,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:17,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:17,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:17,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:17,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:18,779 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:18,780 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 21:21:18,787 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:18,849 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:18,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:18,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:18,924 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:18,924 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-09-26 21:21:18,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:21:18,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:21:18,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2018-09-26 21:21:18,925 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-09-26 21:21:19,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:19,438 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-09-26 21:21:19,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:21:19,438 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-09-26 21:21:19,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:19,439 INFO L225 Difference]: With dead ends: 109 [2018-09-26 21:21:19,439 INFO L226 Difference]: Without dead ends: 107 [2018-09-26 21:21:19,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1109, Invalid=1861, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:21:19,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-26 21:21:19,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-09-26 21:21:19,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-26 21:21:19,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-09-26 21:21:19,458 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2018-09-26 21:21:19,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:19,459 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-09-26 21:21:19,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:21:19,459 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-09-26 21:21:19,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-26 21:21:19,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:19,459 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-09-26 21:21:19,460 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:19,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:19,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1462164711, now seen corresponding path program 47 times [2018-09-26 21:21:19,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:19,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:19,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:19,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:19,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:20,476 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:20,476 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 21:21:20,483 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:20,563 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-26 21:21:20,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:20,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:20,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:20,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-26 21:21:20,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:21:20,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:21:20,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=1951, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:21:20,619 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 52 states. [2018-09-26 21:21:21,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:21,930 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-09-26 21:21:21,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:21:21,930 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-26 21:21:21,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:21,931 INFO L225 Difference]: With dead ends: 158 [2018-09-26 21:21:21,931 INFO L226 Difference]: Without dead ends: 105 [2018-09-26 21:21:21,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1401, Invalid=4451, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:21:21,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-26 21:21:21,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-26 21:21:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-26 21:21:21,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-09-26 21:21:21,954 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-09-26 21:21:21,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:21,955 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-09-26 21:21:21,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:21:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-09-26 21:21:21,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-26 21:21:21,955 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:21,955 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-09-26 21:21:21,956 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:21,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:21,956 INFO L82 PathProgramCache]: Analyzing trace with hash 850942547, now seen corresponding path program 48 times [2018-09-26 21:21:21,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:21,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:21,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:21,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:21,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:23,401 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:23,401 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 21:21:23,408 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:23,496 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-09-26 21:21:23,496 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:23,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:23,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:23,600 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:23,600 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-09-26 21:21:23,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:21:23,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:21:23,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2018-09-26 21:21:23,601 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2018-09-26 21:21:24,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:24,146 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-09-26 21:21:24,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:21:24,146 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2018-09-26 21:21:24,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:24,147 INFO L225 Difference]: With dead ends: 113 [2018-09-26 21:21:24,148 INFO L226 Difference]: Without dead ends: 111 [2018-09-26 21:21:24,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1192, Invalid=2000, Unknown=0, NotChecked=0, Total=3192 [2018-09-26 21:21:24,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-26 21:21:24,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2018-09-26 21:21:24,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-26 21:21:24,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-09-26 21:21:24,171 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-09-26 21:21:24,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:24,172 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-09-26 21:21:24,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:21:24,172 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-09-26 21:21:24,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-26 21:21:24,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:24,172 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-09-26 21:21:24,173 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:24,173 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:24,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1711934671, now seen corresponding path program 49 times [2018-09-26 21:21:24,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:24,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:24,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:24,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:24,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:25,140 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:25,140 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 21:21:25,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:25,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:25,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:25,260 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:25,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-26 21:21:25,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:21:25,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:21:25,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:21:25,262 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 54 states. [2018-09-26 21:21:26,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:26,808 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-09-26 21:21:26,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:21:26,808 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-26 21:21:26,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:26,809 INFO L225 Difference]: With dead ends: 164 [2018-09-26 21:21:26,810 INFO L226 Difference]: Without dead ends: 109 [2018-09-26 21:21:26,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1509, Invalid=4811, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:21:26,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-26 21:21:26,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-26 21:21:26,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-26 21:21:26,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-09-26 21:21:26,836 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-09-26 21:21:26,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:26,837 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-09-26 21:21:26,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:21:26,837 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-09-26 21:21:26,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-26 21:21:26,838 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:26,838 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-09-26 21:21:26,838 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:26,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:26,839 INFO L82 PathProgramCache]: Analyzing trace with hash -223930615, now seen corresponding path program 50 times [2018-09-26 21:21:26,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:26,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:26,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:26,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:26,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:27,802 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:27,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:27,810 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:27,874 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:27,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:27,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:27,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:27,977 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:27,977 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-09-26 21:21:27,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:21:27,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:21:27,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2018-09-26 21:21:27,979 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-09-26 21:21:28,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:28,743 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-09-26 21:21:28,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:21:28,743 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-09-26 21:21:28,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:28,744 INFO L225 Difference]: With dead ends: 117 [2018-09-26 21:21:28,745 INFO L226 Difference]: Without dead ends: 115 [2018-09-26 21:21:28,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1278, Invalid=2144, Unknown=0, NotChecked=0, Total=3422 [2018-09-26 21:21:28,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-26 21:21:28,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-09-26 21:21:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-26 21:21:28,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-09-26 21:21:28,764 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-09-26 21:21:28,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:28,765 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-09-26 21:21:28,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:21:28,765 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-09-26 21:21:28,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-26 21:21:28,765 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:28,766 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-09-26 21:21:28,766 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:28,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:28,766 INFO L82 PathProgramCache]: Analyzing trace with hash -449022971, now seen corresponding path program 51 times [2018-09-26 21:21:28,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:28,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:28,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:28,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:28,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:30,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:30,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:30,176 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 21:21:30,187 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:30,268 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-26 21:21:30,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:30,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:30,315 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:30,316 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-26 21:21:30,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:21:30,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:21:30,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=2269, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:21:30,317 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 56 states. [2018-09-26 21:21:31,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:31,837 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-09-26 21:21:31,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:21:31,837 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-26 21:21:31,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:31,838 INFO L225 Difference]: With dead ends: 170 [2018-09-26 21:21:31,838 INFO L226 Difference]: Without dead ends: 113 [2018-09-26 21:21:31,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2018-09-26 21:21:31,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-26 21:21:31,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-26 21:21:31,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-26 21:21:31,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-09-26 21:21:31,856 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2018-09-26 21:21:31,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:31,856 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-09-26 21:21:31,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:21:31,857 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-09-26 21:21:31,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-26 21:21:31,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:31,857 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-09-26 21:21:31,857 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:31,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:31,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1802883391, now seen corresponding path program 52 times [2018-09-26 21:21:31,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:31,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:31,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:31,858 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:31,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:32,400 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:32,400 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 21:21:32,407 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:32,471 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:32,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:32,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:32,748 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:32,748 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-09-26 21:21:32,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:21:32,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:21:32,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=586, Unknown=0, NotChecked=0, Total=1056 [2018-09-26 21:21:32,749 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2018-09-26 21:21:33,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:33,422 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-09-26 21:21:33,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:21:33,422 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2018-09-26 21:21:33,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:33,423 INFO L225 Difference]: With dead ends: 121 [2018-09-26 21:21:33,424 INFO L226 Difference]: Without dead ends: 119 [2018-09-26 21:21:33,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1367, Invalid=2293, Unknown=0, NotChecked=0, Total=3660 [2018-09-26 21:21:33,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-26 21:21:33,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-09-26 21:21:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-26 21:21:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-09-26 21:21:33,452 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-09-26 21:21:33,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:33,452 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-09-26 21:21:33,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:21:33,452 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-09-26 21:21:33,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-26 21:21:33,453 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:33,453 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-09-26 21:21:33,453 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:33,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:33,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1699051707, now seen corresponding path program 53 times [2018-09-26 21:21:33,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:33,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:33,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:33,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:33,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:34,671 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:34,671 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:21:34,680 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:34,763 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-26 21:21:34,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:34,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:34,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:34,821 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:34,822 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-26 21:21:34,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:21:34,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:21:34,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-09-26 21:21:34,823 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 58 states. [2018-09-26 21:21:36,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:36,209 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-09-26 21:21:36,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:21:36,209 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-26 21:21:36,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:36,210 INFO L225 Difference]: With dead ends: 176 [2018-09-26 21:21:36,210 INFO L226 Difference]: Without dead ends: 117 [2018-09-26 21:21:36,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1737, Invalid=5573, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:21:36,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-26 21:21:36,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-26 21:21:36,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-26 21:21:36,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-09-26 21:21:36,229 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-09-26 21:21:36,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:36,230 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-09-26 21:21:36,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:21:36,230 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-09-26 21:21:36,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-26 21:21:36,231 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:36,231 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-09-26 21:21:36,231 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:36,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:36,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1220126965, now seen corresponding path program 54 times [2018-09-26 21:21:36,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:36,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:36,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:36,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:36,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:37,206 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:37,206 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 21:21:37,213 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:37,299 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-09-26 21:21:37,300 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:37,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:37,609 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:37,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-09-26 21:21:37,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:21:37,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:21:37,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2018-09-26 21:21:37,610 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-09-26 21:21:38,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:38,189 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-09-26 21:21:38,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:21:38,190 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-09-26 21:21:38,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:38,190 INFO L225 Difference]: With dead ends: 125 [2018-09-26 21:21:38,190 INFO L226 Difference]: Without dead ends: 123 [2018-09-26 21:21:38,191 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1459, Invalid=2447, Unknown=0, NotChecked=0, Total=3906 [2018-09-26 21:21:38,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-26 21:21:38,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-09-26 21:21:38,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-26 21:21:38,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-09-26 21:21:38,218 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2018-09-26 21:21:38,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:38,219 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-09-26 21:21:38,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:21:38,219 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-09-26 21:21:38,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-26 21:21:38,219 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:38,219 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-09-26 21:21:38,220 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:38,220 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:38,220 INFO L82 PathProgramCache]: Analyzing trace with hash 15874801, now seen corresponding path program 55 times [2018-09-26 21:21:38,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:38,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:38,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:38,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:38,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:39,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:39,663 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:39,664 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 21:21:39,675 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:39,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:39,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:39,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:39,799 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-26 21:21:39,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:21:39,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:21:39,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2018-09-26 21:21:39,800 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 60 states. [2018-09-26 21:21:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:42,724 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-09-26 21:21:42,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:21:42,724 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-26 21:21:42,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:42,724 INFO L225 Difference]: With dead ends: 182 [2018-09-26 21:21:42,725 INFO L226 Difference]: Without dead ends: 121 [2018-09-26 21:21:42,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1857, Invalid=5975, Unknown=0, NotChecked=0, Total=7832 [2018-09-26 21:21:42,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-26 21:21:42,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-26 21:21:42,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-26 21:21:42,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-09-26 21:21:42,746 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2018-09-26 21:21:42,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:42,746 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-09-26 21:21:42,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:21:42,746 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-09-26 21:21:42,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-26 21:21:42,747 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:42,747 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-09-26 21:21:42,747 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:42,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:42,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1308639701, now seen corresponding path program 56 times [2018-09-26 21:21:42,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:42,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:42,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:42,748 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:42,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:43,468 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:43,468 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 21:21:43,477 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:43,543 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:43,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:43,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:43,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:43,811 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:43,811 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-09-26 21:21:43,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:21:43,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:21:43,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=657, Unknown=0, NotChecked=0, Total=1190 [2018-09-26 21:21:43,812 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2018-09-26 21:21:44,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:44,552 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-09-26 21:21:44,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:21:44,552 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2018-09-26 21:21:44,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:44,553 INFO L225 Difference]: With dead ends: 129 [2018-09-26 21:21:44,553 INFO L226 Difference]: Without dead ends: 127 [2018-09-26 21:21:44,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1554, Invalid=2606, Unknown=0, NotChecked=0, Total=4160 [2018-09-26 21:21:44,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-26 21:21:44,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-09-26 21:21:44,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-26 21:21:44,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-09-26 21:21:44,579 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-09-26 21:21:44,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:44,579 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-09-26 21:21:44,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:21:44,579 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-09-26 21:21:44,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-26 21:21:44,579 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:44,579 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-09-26 21:21:44,580 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:44,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:44,580 INFO L82 PathProgramCache]: Analyzing trace with hash 822598311, now seen corresponding path program 57 times [2018-09-26 21:21:44,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:44,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:44,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:44,581 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:44,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:44,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:45,693 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:45,693 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 21:21:45,700 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:21:45,827 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-26 21:21:45,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:45,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:45,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:45,884 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-26 21:21:45,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:21:45,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:21:45,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-09-26 21:21:45,885 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 62 states. [2018-09-26 21:21:47,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:47,653 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-09-26 21:21:47,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:21:47,653 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-09-26 21:21:47,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:47,654 INFO L225 Difference]: With dead ends: 188 [2018-09-26 21:21:47,654 INFO L226 Difference]: Without dead ends: 125 [2018-09-26 21:21:47,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1981, Invalid=6391, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:21:47,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-26 21:21:47,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-26 21:21:47,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-26 21:21:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-09-26 21:21:47,684 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-09-26 21:21:47,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:47,684 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-09-26 21:21:47,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:21:47,684 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-09-26 21:21:47,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-26 21:21:47,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:47,685 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-09-26 21:21:47,685 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:47,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:47,686 INFO L82 PathProgramCache]: Analyzing trace with hash -858967839, now seen corresponding path program 58 times [2018-09-26 21:21:47,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:47,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:47,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:47,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:47,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:48,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:48,250 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:48,250 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 21:21:48,260 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:21:48,334 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:21:48,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:48,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:48,492 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:48,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-09-26 21:21:48,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:21:48,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:21:48,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2018-09-26 21:21:48,493 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-09-26 21:21:49,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:49,359 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-09-26 21:21:49,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:21:49,359 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-09-26 21:21:49,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:49,360 INFO L225 Difference]: With dead ends: 133 [2018-09-26 21:21:49,360 INFO L226 Difference]: Without dead ends: 131 [2018-09-26 21:21:49,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1652, Invalid=2770, Unknown=0, NotChecked=0, Total=4422 [2018-09-26 21:21:49,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-26 21:21:49,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-09-26 21:21:49,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-26 21:21:49,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-09-26 21:21:49,383 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2018-09-26 21:21:49,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:49,383 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-09-26 21:21:49,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:21:49,383 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-09-26 21:21:49,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-26 21:21:49,384 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:49,384 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-09-26 21:21:49,384 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:49,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:49,385 INFO L82 PathProgramCache]: Analyzing trace with hash -834439203, now seen corresponding path program 59 times [2018-09-26 21:21:49,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:49,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:49,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:49,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:49,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:50,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:50,565 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 21:21:50,573 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:21:50,677 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-26 21:21:50,677 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:50,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:50,735 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:50,736 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-26 21:21:50,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-26 21:21:50,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-26 21:21:50,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2018-09-26 21:21:50,737 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 64 states. [2018-09-26 21:21:52,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:52,804 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-09-26 21:21:52,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-26 21:21:52,804 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-09-26 21:21:52,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:52,805 INFO L225 Difference]: With dead ends: 194 [2018-09-26 21:21:52,805 INFO L226 Difference]: Without dead ends: 129 [2018-09-26 21:21:52,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2109, Invalid=6821, Unknown=0, NotChecked=0, Total=8930 [2018-09-26 21:21:52,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-26 21:21:52,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-26 21:21:52,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-26 21:21:52,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-09-26 21:21:52,829 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-09-26 21:21:52,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:52,829 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-09-26 21:21:52,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-26 21:21:52,829 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-09-26 21:21:52,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-26 21:21:52,830 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:52,830 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-09-26 21:21:52,830 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:52,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:52,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1096867561, now seen corresponding path program 60 times [2018-09-26 21:21:52,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:52,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:52,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:52,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:52,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:53,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:53,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:21:53,366 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:21:53,473 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-09-26 21:21:53,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:53,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:53,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:53,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-09-26 21:21:53,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:21:53,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:21:53,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2018-09-26 21:21:53,552 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2018-09-26 21:21:54,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:54,465 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-09-26 21:21:54,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:21:54,465 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2018-09-26 21:21:54,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:54,466 INFO L225 Difference]: With dead ends: 137 [2018-09-26 21:21:54,466 INFO L226 Difference]: Without dead ends: 135 [2018-09-26 21:21:54,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1753, Invalid=2939, Unknown=0, NotChecked=0, Total=4692 [2018-09-26 21:21:54,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-26 21:21:54,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2018-09-26 21:21:54,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-26 21:21:54,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-09-26 21:21:54,492 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-09-26 21:21:54,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:54,492 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-09-26 21:21:54,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:21:54,492 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-09-26 21:21:54,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-26 21:21:54,493 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:54,493 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-09-26 21:21:54,493 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:54,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:54,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1822805357, now seen corresponding path program 61 times [2018-09-26 21:21:54,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:54,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:54,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:54,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:54,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:55,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:55,684 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 21:21:55,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:55,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:55,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:55,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-26 21:21:55,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:21:55,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:21:55,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-09-26 21:21:55,824 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 66 states. [2018-09-26 21:21:57,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:57,946 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-09-26 21:21:57,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:21:57,946 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-09-26 21:21:57,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:57,947 INFO L225 Difference]: With dead ends: 200 [2018-09-26 21:21:57,947 INFO L226 Difference]: Without dead ends: 133 [2018-09-26 21:21:57,947 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2241, Invalid=7265, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:21:57,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-26 21:21:57,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-26 21:21:57,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-26 21:21:57,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-09-26 21:21:57,971 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-09-26 21:21:57,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:57,971 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-09-26 21:21:57,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:21:57,971 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-09-26 21:21:57,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-26 21:21:57,972 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:57,972 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-09-26 21:21:57,972 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:57,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:57,972 INFO L82 PathProgramCache]: Analyzing trace with hash 787132109, now seen corresponding path program 62 times [2018-09-26 21:21:57,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:57,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:57,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:57,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:21:57,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:21:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:58,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:21:58,690 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 21:21:58,699 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:21:58,777 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:21:58,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:21:58,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:21:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:21:59,038 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:21:59,038 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-09-26 21:21:59,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:21:59,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:21:59,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2018-09-26 21:21:59,039 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-09-26 21:21:59,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:21:59,939 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-09-26 21:21:59,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:21:59,940 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-09-26 21:21:59,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:21:59,940 INFO L225 Difference]: With dead ends: 141 [2018-09-26 21:21:59,940 INFO L226 Difference]: Without dead ends: 139 [2018-09-26 21:21:59,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1857, Invalid=3113, Unknown=0, NotChecked=0, Total=4970 [2018-09-26 21:21:59,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-26 21:21:59,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-09-26 21:21:59,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-26 21:21:59,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-09-26 21:21:59,966 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-09-26 21:21:59,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:21:59,967 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-09-26 21:21:59,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:21:59,967 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-09-26 21:21:59,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-26 21:21:59,968 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:21:59,968 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-09-26 21:21:59,968 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:21:59,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:21:59,968 INFO L82 PathProgramCache]: Analyzing trace with hash 519645897, now seen corresponding path program 63 times [2018-09-26 21:21:59,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:21:59,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:21:59,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:59,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:21:59,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:21:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:01,401 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:01,401 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 21:22:01,411 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:22:01,519 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-26 21:22:01,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:01,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:01,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:01,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-26 21:22:01,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:22:01,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:22:01,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=3367, Unknown=0, NotChecked=0, Total=4556 [2018-09-26 21:22:01,575 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 68 states. [2018-09-26 21:22:03,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:03,787 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2018-09-26 21:22:03,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-26 21:22:03,787 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-09-26 21:22:03,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:03,788 INFO L225 Difference]: With dead ends: 206 [2018-09-26 21:22:03,788 INFO L226 Difference]: Without dead ends: 137 [2018-09-26 21:22:03,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2377, Invalid=7723, Unknown=0, NotChecked=0, Total=10100 [2018-09-26 21:22:03,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-26 21:22:03,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-26 21:22:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-26 21:22:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-09-26 21:22:03,814 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2018-09-26 21:22:03,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:03,814 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-09-26 21:22:03,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:22:03,814 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-09-26 21:22:03,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-26 21:22:03,815 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:03,815 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-09-26 21:22:03,815 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:03,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:03,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1226635779, now seen corresponding path program 64 times [2018-09-26 21:22:03,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:03,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:03,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:03,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:03,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:04,673 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:04,673 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 21:22:04,680 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:22:04,765 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:22:04,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:04,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:04,917 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:04,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-09-26 21:22:04,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:22:04,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:22:04,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=811, Unknown=0, NotChecked=0, Total=1482 [2018-09-26 21:22:04,919 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 39 states. [2018-09-26 21:22:05,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:05,744 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-09-26 21:22:05,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:22:05,745 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 136 [2018-09-26 21:22:05,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:05,745 INFO L225 Difference]: With dead ends: 145 [2018-09-26 21:22:05,745 INFO L226 Difference]: Without dead ends: 143 [2018-09-26 21:22:05,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1964, Invalid=3292, Unknown=0, NotChecked=0, Total=5256 [2018-09-26 21:22:05,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-26 21:22:05,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-09-26 21:22:05,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-26 21:22:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-09-26 21:22:05,772 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-09-26 21:22:05,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:05,773 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-09-26 21:22:05,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:22:05,773 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-09-26 21:22:05,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-26 21:22:05,774 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:05,774 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-09-26 21:22:05,774 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:05,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:05,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1975877759, now seen corresponding path program 65 times [2018-09-26 21:22:05,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:05,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:05,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:05,775 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:05,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:07,217 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:07,217 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 21:22:07,226 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:22:07,337 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-26 21:22:07,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:07,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:07,389 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:07,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-26 21:22:07,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-26 21:22:07,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-26 21:22:07,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-09-26 21:22:07,391 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 70 states. [2018-09-26 21:22:09,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:09,966 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-09-26 21:22:09,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:22:09,966 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-09-26 21:22:09,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:09,967 INFO L225 Difference]: With dead ends: 212 [2018-09-26 21:22:09,967 INFO L226 Difference]: Without dead ends: 141 [2018-09-26 21:22:09,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2517, Invalid=8195, Unknown=0, NotChecked=0, Total=10712 [2018-09-26 21:22:09,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-26 21:22:09,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-26 21:22:09,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-26 21:22:09,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-09-26 21:22:09,994 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-09-26 21:22:09,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:09,995 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-09-26 21:22:09,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-26 21:22:09,995 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-09-26 21:22:09,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-26 21:22:09,995 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:09,995 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-09-26 21:22:09,996 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:09,996 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:09,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1050354361, now seen corresponding path program 66 times [2018-09-26 21:22:09,996 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:09,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:09,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:09,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:09,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:10,574 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:10,574 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 21:22:10,582 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:22:10,698 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-09-26 21:22:10,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:10,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:10,765 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:10,765 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-09-26 21:22:10,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:22:10,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:22:10,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2018-09-26 21:22:10,766 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-09-26 21:22:11,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:11,532 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-09-26 21:22:11,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-26 21:22:11,532 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-09-26 21:22:11,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:11,533 INFO L225 Difference]: With dead ends: 149 [2018-09-26 21:22:11,533 INFO L226 Difference]: Without dead ends: 147 [2018-09-26 21:22:11,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2074, Invalid=3476, Unknown=0, NotChecked=0, Total=5550 [2018-09-26 21:22:11,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-26 21:22:11,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2018-09-26 21:22:11,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-26 21:22:11,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-09-26 21:22:11,561 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2018-09-26 21:22:11,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:11,561 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-09-26 21:22:11,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:22:11,562 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-09-26 21:22:11,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-26 21:22:11,562 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:11,562 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-09-26 21:22:11,562 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:11,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:11,563 INFO L82 PathProgramCache]: Analyzing trace with hash 73159605, now seen corresponding path program 67 times [2018-09-26 21:22:11,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:11,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:11,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:11,563 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:11,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:13,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:13,096 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:13,096 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 21:22:13,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:13,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:13,238 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:13,238 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-26 21:22:13,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:22:13,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:22:13,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=3781, Unknown=0, NotChecked=0, Total=5112 [2018-09-26 21:22:13,240 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 72 states. [2018-09-26 21:22:15,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:15,964 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2018-09-26 21:22:15,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:22:15,964 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-09-26 21:22:15,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:15,965 INFO L225 Difference]: With dead ends: 218 [2018-09-26 21:22:15,965 INFO L226 Difference]: Without dead ends: 145 [2018-09-26 21:22:15,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2661, Invalid=8681, Unknown=0, NotChecked=0, Total=11342 [2018-09-26 21:22:15,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-26 21:22:16,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-26 21:22:16,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-26 21:22:16,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-09-26 21:22:16,005 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2018-09-26 21:22:16,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:16,005 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-09-26 21:22:16,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:22:16,006 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-09-26 21:22:16,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-26 21:22:16,006 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:16,007 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-09-26 21:22:16,007 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:16,007 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:16,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1220692207, now seen corresponding path program 68 times [2018-09-26 21:22:16,007 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:16,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:16,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:16,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:16,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:16,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:16,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:22:16,627 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:22:16,715 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:22:16,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:16,719 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:17,006 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:17,006 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-09-26 21:22:17,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:22:17,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:22:17,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=894, Unknown=0, NotChecked=0, Total=1640 [2018-09-26 21:22:17,007 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 41 states. [2018-09-26 21:22:17,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:17,807 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-09-26 21:22:17,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-26 21:22:17,808 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2018-09-26 21:22:17,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:17,809 INFO L225 Difference]: With dead ends: 153 [2018-09-26 21:22:17,809 INFO L226 Difference]: Without dead ends: 151 [2018-09-26 21:22:17,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2187, Invalid=3665, Unknown=0, NotChecked=0, Total=5852 [2018-09-26 21:22:17,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-26 21:22:17,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2018-09-26 21:22:17,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-26 21:22:17,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-09-26 21:22:17,844 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-09-26 21:22:17,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:17,844 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-09-26 21:22:17,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:22:17,844 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-09-26 21:22:17,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-26 21:22:17,845 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:17,845 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-09-26 21:22:17,845 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:17,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:17,846 INFO L82 PathProgramCache]: Analyzing trace with hash 559072363, now seen corresponding path program 69 times [2018-09-26 21:22:17,846 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:17,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:17,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:17,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:17,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:19,343 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:19,343 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 21:22:19,350 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:22:19,477 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-26 21:22:19,478 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:19,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:19,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:19,529 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-26 21:22:19,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-26 21:22:19,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-26 21:22:19,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-09-26 21:22:19,530 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 74 states. [2018-09-26 21:22:22,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:22,345 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2018-09-26 21:22:22,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-26 21:22:22,345 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-09-26 21:22:22,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:22,346 INFO L225 Difference]: With dead ends: 224 [2018-09-26 21:22:22,346 INFO L226 Difference]: Without dead ends: 149 [2018-09-26 21:22:22,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2809, Invalid=9181, Unknown=0, NotChecked=0, Total=11990 [2018-09-26 21:22:22,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-26 21:22:22,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-26 21:22:22,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-26 21:22:22,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-09-26 21:22:22,386 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-09-26 21:22:22,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:22,386 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-09-26 21:22:22,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-26 21:22:22,386 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-09-26 21:22:22,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-26 21:22:22,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:22,387 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-09-26 21:22:22,387 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:22,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:22,388 INFO L82 PathProgramCache]: Analyzing trace with hash 719817893, now seen corresponding path program 70 times [2018-09-26 21:22:22,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:22,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:22,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:22,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:22,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:23,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:23,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:23,230 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 21:22:23,236 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:22:23,329 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:22:23,330 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:23,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:23,433 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:23,433 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-09-26 21:22:23,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:22:23,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:22:23,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2018-09-26 21:22:23,434 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-09-26 21:22:24,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:24,313 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-09-26 21:22:24,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-26 21:22:24,313 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-09-26 21:22:24,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:24,314 INFO L225 Difference]: With dead ends: 157 [2018-09-26 21:22:24,314 INFO L226 Difference]: Without dead ends: 155 [2018-09-26 21:22:24,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2303, Invalid=3859, Unknown=0, NotChecked=0, Total=6162 [2018-09-26 21:22:24,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-26 21:22:24,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2018-09-26 21:22:24,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-26 21:22:24,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-09-26 21:22:24,355 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2018-09-26 21:22:24,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:24,355 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-09-26 21:22:24,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:22:24,355 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-09-26 21:22:24,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-26 21:22:24,356 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:24,356 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-09-26 21:22:24,356 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:24,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:24,357 INFO L82 PathProgramCache]: Analyzing trace with hash 255193761, now seen corresponding path program 71 times [2018-09-26 21:22:24,357 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:24,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:24,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:24,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:24,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:26,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:26,314 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:26,314 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 21:22:26,321 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:22:26,446 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-26 21:22:26,446 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:26,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:26,498 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:26,498 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-26 21:22:26,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-26 21:22:26,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-26 21:22:26,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1481, Invalid=4219, Unknown=0, NotChecked=0, Total=5700 [2018-09-26 21:22:26,500 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 76 states. [2018-09-26 21:22:29,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:29,249 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2018-09-26 21:22:29,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-26 21:22:29,249 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-09-26 21:22:29,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:29,250 INFO L225 Difference]: With dead ends: 230 [2018-09-26 21:22:29,250 INFO L226 Difference]: Without dead ends: 153 [2018-09-26 21:22:29,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2961, Invalid=9695, Unknown=0, NotChecked=0, Total=12656 [2018-09-26 21:22:29,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-26 21:22:29,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-26 21:22:29,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-26 21:22:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-09-26 21:22:29,289 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2018-09-26 21:22:29,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:29,289 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-09-26 21:22:29,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-26 21:22:29,290 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-09-26 21:22:29,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-26 21:22:29,290 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:29,290 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-09-26 21:22:29,290 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:29,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:29,291 INFO L82 PathProgramCache]: Analyzing trace with hash 878185947, now seen corresponding path program 72 times [2018-09-26 21:22:29,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:29,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:29,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:29,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:29,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:29,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:30,288 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:30,288 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 21:22:30,296 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:22:30,424 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-09-26 21:22:30,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:30,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:30,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:30,583 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-09-26 21:22:30,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-26 21:22:30,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-26 21:22:30,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2018-09-26 21:22:30,584 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 43 states. [2018-09-26 21:22:31,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:31,445 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2018-09-26 21:22:31,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-26 21:22:31,446 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 152 [2018-09-26 21:22:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:31,447 INFO L225 Difference]: With dead ends: 161 [2018-09-26 21:22:31,447 INFO L226 Difference]: Without dead ends: 159 [2018-09-26 21:22:31,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2422, Invalid=4058, Unknown=0, NotChecked=0, Total=6480 [2018-09-26 21:22:31,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-26 21:22:31,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-09-26 21:22:31,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-26 21:22:31,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-09-26 21:22:31,485 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-09-26 21:22:31,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:31,485 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-09-26 21:22:31,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-26 21:22:31,485 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-09-26 21:22:31,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-26 21:22:31,486 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:31,486 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-09-26 21:22:31,486 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:31,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:31,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2123038295, now seen corresponding path program 73 times [2018-09-26 21:22:31,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:31,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:31,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:31,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:31,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:33,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:33,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:22:33,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:33,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:33,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:33,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-26 21:22:33,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-26 21:22:33,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-26 21:22:33,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-09-26 21:22:33,306 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 78 states. [2018-09-26 21:22:36,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:36,490 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-09-26 21:22:36,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-26 21:22:36,490 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-09-26 21:22:36,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:36,490 INFO L225 Difference]: With dead ends: 236 [2018-09-26 21:22:36,491 INFO L226 Difference]: Without dead ends: 157 [2018-09-26 21:22:36,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3117, Invalid=10223, Unknown=0, NotChecked=0, Total=13340 [2018-09-26 21:22:36,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-26 21:22:36,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-26 21:22:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-26 21:22:36,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-09-26 21:22:36,524 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-09-26 21:22:36,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:36,524 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-09-26 21:22:36,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-26 21:22:36,524 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-09-26 21:22:36,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-26 21:22:36,524 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:36,524 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-09-26 21:22:36,525 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:36,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:36,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1034359663, now seen corresponding path program 74 times [2018-09-26 21:22:36,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:36,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:36,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:36,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:36,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:37,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:37,251 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 21:22:37,258 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:22:37,354 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:22:37,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:37,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:37,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:37,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-09-26 21:22:37,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:22:37,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:22:37,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2018-09-26 21:22:37,497 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-09-26 21:22:38,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:38,404 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2018-09-26 21:22:38,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-26 21:22:38,405 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-09-26 21:22:38,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:38,406 INFO L225 Difference]: With dead ends: 165 [2018-09-26 21:22:38,406 INFO L226 Difference]: Without dead ends: 163 [2018-09-26 21:22:38,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2544, Invalid=4262, Unknown=0, NotChecked=0, Total=6806 [2018-09-26 21:22:38,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-26 21:22:38,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-09-26 21:22:38,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-26 21:22:38,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-09-26 21:22:38,448 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2018-09-26 21:22:38,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:38,448 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-09-26 21:22:38,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:22:38,448 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-09-26 21:22:38,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-26 21:22:38,448 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:38,449 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-09-26 21:22:38,449 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:38,449 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:38,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1882257523, now seen corresponding path program 75 times [2018-09-26 21:22:38,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:38,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:38,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:38,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:38,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:40,540 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:40,540 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 21:22:40,546 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:22:40,684 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-26 21:22:40,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:40,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:40,749 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:40,749 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-26 21:22:40,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-26 21:22:40,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-26 21:22:40,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1639, Invalid=4681, Unknown=0, NotChecked=0, Total=6320 [2018-09-26 21:22:40,750 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 80 states. [2018-09-26 21:22:43,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:43,933 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2018-09-26 21:22:43,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-26 21:22:43,933 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-09-26 21:22:43,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:43,934 INFO L225 Difference]: With dead ends: 242 [2018-09-26 21:22:43,934 INFO L226 Difference]: Without dead ends: 161 [2018-09-26 21:22:43,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3277, Invalid=10765, Unknown=0, NotChecked=0, Total=14042 [2018-09-26 21:22:43,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-26 21:22:43,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-26 21:22:43,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-26 21:22:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-09-26 21:22:43,968 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2018-09-26 21:22:43,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:43,969 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-09-26 21:22:43,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-26 21:22:43,969 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-09-26 21:22:43,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-26 21:22:43,969 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:43,970 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-09-26 21:22:43,970 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:43,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:43,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1109870791, now seen corresponding path program 76 times [2018-09-26 21:22:43,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:43,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:43,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:43,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:43,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:44,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:44,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:44,722 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:22:44,812 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:22:44,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:44,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:44,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:44,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-09-26 21:22:44,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:22:44,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:22:44,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=1072, Unknown=0, NotChecked=0, Total=1980 [2018-09-26 21:22:44,912 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 45 states. [2018-09-26 21:22:46,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:46,011 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-09-26 21:22:46,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-26 21:22:46,011 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 160 [2018-09-26 21:22:46,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:46,012 INFO L225 Difference]: With dead ends: 169 [2018-09-26 21:22:46,012 INFO L226 Difference]: Without dead ends: 167 [2018-09-26 21:22:46,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2669, Invalid=4471, Unknown=0, NotChecked=0, Total=7140 [2018-09-26 21:22:46,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-26 21:22:46,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2018-09-26 21:22:46,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-26 21:22:46,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-09-26 21:22:46,056 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-09-26 21:22:46,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:46,056 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-09-26 21:22:46,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:22:46,056 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-09-26 21:22:46,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-26 21:22:46,057 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:46,057 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-09-26 21:22:46,057 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:46,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:46,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1433873987, now seen corresponding path program 77 times [2018-09-26 21:22:46,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:46,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:46,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:46,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:46,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:48,095 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:48,095 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:48,101 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:22:48,242 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-26 21:22:48,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:48,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:48,306 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:48,306 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-26 21:22:48,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-26 21:22:48,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-26 21:22:48,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-09-26 21:22:48,307 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 82 states. [2018-09-26 21:22:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:51,973 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2018-09-26 21:22:51,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-26 21:22:51,973 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-09-26 21:22:51,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:51,974 INFO L225 Difference]: With dead ends: 248 [2018-09-26 21:22:51,974 INFO L226 Difference]: Without dead ends: 165 [2018-09-26 21:22:51,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3441, Invalid=11321, Unknown=0, NotChecked=0, Total=14762 [2018-09-26 21:22:51,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-26 21:22:52,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-26 21:22:52,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-26 21:22:52,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-09-26 21:22:52,010 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-09-26 21:22:52,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:52,011 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-09-26 21:22:52,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-26 21:22:52,011 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-09-26 21:22:52,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-26 21:22:52,012 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:52,012 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-09-26 21:22:52,012 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:52,012 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:52,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1292352899, now seen corresponding path program 78 times [2018-09-26 21:22:52,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:52,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:52,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:52,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:52,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:52,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:52,835 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:52,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:52,843 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:22:52,991 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-09-26 21:22:52,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:22:52,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:53,088 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:53,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-09-26 21:22:53,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:22:53,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:22:53,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2018-09-26 21:22:53,089 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-09-26 21:22:54,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:22:54,091 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2018-09-26 21:22:54,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-26 21:22:54,092 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-09-26 21:22:54,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:22:54,093 INFO L225 Difference]: With dead ends: 173 [2018-09-26 21:22:54,093 INFO L226 Difference]: Without dead ends: 171 [2018-09-26 21:22:54,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2797, Invalid=4685, Unknown=0, NotChecked=0, Total=7482 [2018-09-26 21:22:54,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-26 21:22:54,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2018-09-26 21:22:54,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-26 21:22:54,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-09-26 21:22:54,135 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2018-09-26 21:22:54,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:22:54,135 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-09-26 21:22:54,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:22:54,136 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-09-26 21:22:54,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-26 21:22:54,136 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:22:54,136 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-09-26 21:22:54,137 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:22:54,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:22:54,137 INFO L82 PathProgramCache]: Analyzing trace with hash -705654151, now seen corresponding path program 79 times [2018-09-26 21:22:54,137 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:22:54,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:22:54,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:54,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:22:54,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:22:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:56,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:56,889 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:22:56,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:22:56,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:22:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:22:56,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:22:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:22:57,051 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:22:57,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-26 21:22:57,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-26 21:22:57,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-26 21:22:57,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1805, Invalid=5167, Unknown=0, NotChecked=0, Total=6972 [2018-09-26 21:22:57,052 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 84 states. [2018-09-26 21:23:00,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:00,605 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2018-09-26 21:23:00,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-26 21:23:00,605 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-09-26 21:23:00,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:00,606 INFO L225 Difference]: With dead ends: 254 [2018-09-26 21:23:00,606 INFO L226 Difference]: Without dead ends: 169 [2018-09-26 21:23:00,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3609, Invalid=11891, Unknown=0, NotChecked=0, Total=15500 [2018-09-26 21:23:00,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-26 21:23:00,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-26 21:23:00,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-26 21:23:00,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-09-26 21:23:00,646 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 166 [2018-09-26 21:23:00,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:00,646 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-09-26 21:23:00,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-26 21:23:00,647 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-09-26 21:23:00,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-26 21:23:00,647 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:00,647 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-09-26 21:23:00,648 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:00,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:00,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1476855373, now seen corresponding path program 80 times [2018-09-26 21:23:00,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:00,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:00,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:00,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:23:00,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:01,568 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:01,568 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:01,575 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:23:01,676 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:23:01,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:01,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:01,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:01,920 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:01,920 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2018-09-26 21:23:01,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:23:01,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:23:01,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=1167, Unknown=0, NotChecked=0, Total=2162 [2018-09-26 21:23:01,921 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 47 states. [2018-09-26 21:23:02,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:02,963 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2018-09-26 21:23:02,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-26 21:23:02,963 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 168 [2018-09-26 21:23:02,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:02,964 INFO L225 Difference]: With dead ends: 177 [2018-09-26 21:23:02,964 INFO L226 Difference]: Without dead ends: 175 [2018-09-26 21:23:02,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1806 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2928, Invalid=4904, Unknown=0, NotChecked=0, Total=7832 [2018-09-26 21:23:02,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-26 21:23:03,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2018-09-26 21:23:03,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-26 21:23:03,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-09-26 21:23:03,004 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-09-26 21:23:03,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:03,004 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-09-26 21:23:03,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:23:03,005 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-09-26 21:23:03,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-26 21:23:03,005 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:03,005 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-09-26 21:23:03,005 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:03,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:03,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1918872529, now seen corresponding path program 81 times [2018-09-26 21:23:03,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:03,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:03,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:03,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:03,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:04,971 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:04,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:04,978 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:23:05,142 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-26 21:23:05,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:05,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:05,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:05,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-26 21:23:05,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-26 21:23:05,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-26 21:23:05,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-09-26 21:23:05,197 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 86 states. [2018-09-26 21:23:09,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:09,007 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2018-09-26 21:23:09,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-26 21:23:09,007 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-09-26 21:23:09,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:09,008 INFO L225 Difference]: With dead ends: 260 [2018-09-26 21:23:09,008 INFO L226 Difference]: Without dead ends: 173 [2018-09-26 21:23:09,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3781, Invalid=12475, Unknown=0, NotChecked=0, Total=16256 [2018-09-26 21:23:09,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-26 21:23:09,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-26 21:23:09,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-26 21:23:09,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-09-26 21:23:09,048 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2018-09-26 21:23:09,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:09,049 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-09-26 21:23:09,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-26 21:23:09,049 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-09-26 21:23:09,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-26 21:23:09,050 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:09,050 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1] [2018-09-26 21:23:09,050 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:09,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:09,050 INFO L82 PathProgramCache]: Analyzing trace with hash -900821399, now seen corresponding path program 82 times [2018-09-26 21:23:09,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:09,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:09,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:09,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:09,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:09,926 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:09,926 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:09,936 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:23:10,045 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:23:10,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:10,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:10,140 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:10,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-09-26 21:23:10,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:23:10,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:23:10,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2018-09-26 21:23:10,141 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 48 states. [2018-09-26 21:23:11,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:11,437 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-09-26 21:23:11,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-26 21:23:11,438 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2018-09-26 21:23:11,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:11,439 INFO L225 Difference]: With dead ends: 181 [2018-09-26 21:23:11,439 INFO L226 Difference]: Without dead ends: 179 [2018-09-26 21:23:11,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3062, Invalid=5128, Unknown=0, NotChecked=0, Total=8190 [2018-09-26 21:23:11,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-26 21:23:11,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-09-26 21:23:11,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-26 21:23:11,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-09-26 21:23:11,486 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 172 [2018-09-26 21:23:11,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:11,487 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-09-26 21:23:11,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:23:11,487 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-09-26 21:23:11,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-26 21:23:11,488 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:11,488 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1] [2018-09-26 21:23:11,488 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:11,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:11,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1893962597, now seen corresponding path program 83 times [2018-09-26 21:23:11,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:11,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:11,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:11,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:11,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:13,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:13,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:13,632 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:23:13,793 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-26 21:23:13,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:13,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:13,849 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:13,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-26 21:23:13,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-26 21:23:13,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-26 21:23:13,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1979, Invalid=5677, Unknown=0, NotChecked=0, Total=7656 [2018-09-26 21:23:13,850 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 88 states. [2018-09-26 21:23:16,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:16,199 INFO L93 Difference]: Finished difference Result 266 states and 268 transitions. [2018-09-26 21:23:16,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-26 21:23:16,199 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-09-26 21:23:16,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:16,199 INFO L225 Difference]: With dead ends: 266 [2018-09-26 21:23:16,200 INFO L226 Difference]: Without dead ends: 177 [2018-09-26 21:23:16,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2667 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3957, Invalid=13073, Unknown=0, NotChecked=0, Total=17030 [2018-09-26 21:23:16,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-26 21:23:16,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-26 21:23:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-26 21:23:16,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-09-26 21:23:16,242 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 174 [2018-09-26 21:23:16,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:16,242 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-09-26 21:23:16,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-26 21:23:16,243 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-09-26 21:23:16,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-26 21:23:16,243 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:16,244 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 1, 1, 1, 1] [2018-09-26 21:23:16,244 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:16,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:16,244 INFO L82 PathProgramCache]: Analyzing trace with hash -619306849, now seen corresponding path program 84 times [2018-09-26 21:23:16,244 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:16,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:16,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:16,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:16,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:17,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:17,120 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:17,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:17,127 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:23:17,286 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-09-26 21:23:17,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:17,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:17,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:17,383 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:17,383 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2018-09-26 21:23:17,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:23:17,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:23:17,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2018-09-26 21:23:17,385 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 49 states. [2018-09-26 21:23:18,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:18,450 INFO L93 Difference]: Finished difference Result 185 states and 186 transitions. [2018-09-26 21:23:18,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-26 21:23:18,451 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 176 [2018-09-26 21:23:18,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:18,452 INFO L225 Difference]: With dead ends: 185 [2018-09-26 21:23:18,453 INFO L226 Difference]: Without dead ends: 183 [2018-09-26 21:23:18,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1980 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3199, Invalid=5357, Unknown=0, NotChecked=0, Total=8556 [2018-09-26 21:23:18,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-26 21:23:18,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-09-26 21:23:18,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-26 21:23:18,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-09-26 21:23:18,498 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2018-09-26 21:23:18,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:18,499 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-09-26 21:23:18,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:23:18,499 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-09-26 21:23:18,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-26 21:23:18,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:18,500 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-09-26 21:23:18,500 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:18,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:18,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1846505499, now seen corresponding path program 85 times [2018-09-26 21:23:18,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:18,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:18,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:18,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:18,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:18,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:20,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:20,716 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:20,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:20,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:23:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:20,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:20,900 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:20,900 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-26 21:23:20,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-26 21:23:20,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-26 21:23:20,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-09-26 21:23:20,902 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 90 states. [2018-09-26 21:23:23,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:23,435 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2018-09-26 21:23:23,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-26 21:23:23,436 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-09-26 21:23:23,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:23,436 INFO L225 Difference]: With dead ends: 272 [2018-09-26 21:23:23,436 INFO L226 Difference]: Without dead ends: 181 [2018-09-26 21:23:23,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4137, Invalid=13685, Unknown=0, NotChecked=0, Total=17822 [2018-09-26 21:23:23,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-26 21:23:23,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-26 21:23:23,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-26 21:23:23,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-09-26 21:23:23,480 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2018-09-26 21:23:23,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:23,481 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-09-26 21:23:23,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-26 21:23:23,481 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-09-26 21:23:23,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-26 21:23:23,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:23,481 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 1, 1, 1, 1] [2018-09-26 21:23:23,482 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:23,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:23,482 INFO L82 PathProgramCache]: Analyzing trace with hash 895799381, now seen corresponding path program 86 times [2018-09-26 21:23:23,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:23,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:23,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:23,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:23:23,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:24,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:24,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:24,437 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:23:24,546 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:23:24,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:24,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:24,646 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:24,647 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-09-26 21:23:24,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:23:24,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:23:24,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2018-09-26 21:23:24,648 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 50 states. [2018-09-26 21:23:25,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:25,772 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2018-09-26 21:23:25,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-26 21:23:25,773 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 180 [2018-09-26 21:23:25,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:25,774 INFO L225 Difference]: With dead ends: 189 [2018-09-26 21:23:25,775 INFO L226 Difference]: Without dead ends: 187 [2018-09-26 21:23:25,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3339, Invalid=5591, Unknown=0, NotChecked=0, Total=8930 [2018-09-26 21:23:25,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-26 21:23:25,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2018-09-26 21:23:25,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-26 21:23:25,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2018-09-26 21:23:25,825 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 180 [2018-09-26 21:23:25,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:25,825 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2018-09-26 21:23:25,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:23:25,826 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2018-09-26 21:23:25,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-26 21:23:25,826 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:25,826 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1] [2018-09-26 21:23:25,827 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:25,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:25,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1869679185, now seen corresponding path program 87 times [2018-09-26 21:23:25,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:25,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:25,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:25,827 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:25,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:28,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:28,450 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:28,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:28,458 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:23:28,629 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-26 21:23:28,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:28,634 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:28,687 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:28,687 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-26 21:23:28,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-26 21:23:28,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-26 21:23:28,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2161, Invalid=6211, Unknown=0, NotChecked=0, Total=8372 [2018-09-26 21:23:28,688 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 92 states. [2018-09-26 21:23:31,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:31,968 INFO L93 Difference]: Finished difference Result 278 states and 280 transitions. [2018-09-26 21:23:31,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-26 21:23:31,968 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-09-26 21:23:31,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:31,969 INFO L225 Difference]: With dead ends: 278 [2018-09-26 21:23:31,969 INFO L226 Difference]: Without dead ends: 185 [2018-09-26 21:23:31,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4321, Invalid=14311, Unknown=0, NotChecked=0, Total=18632 [2018-09-26 21:23:31,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-26 21:23:32,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-26 21:23:32,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-26 21:23:32,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2018-09-26 21:23:32,015 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 182 [2018-09-26 21:23:32,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:32,015 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2018-09-26 21:23:32,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-26 21:23:32,015 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2018-09-26 21:23:32,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-26 21:23:32,016 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:32,016 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 44, 1, 1, 1, 1] [2018-09-26 21:23:32,016 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:32,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:32,016 INFO L82 PathProgramCache]: Analyzing trace with hash -800604789, now seen corresponding path program 88 times [2018-09-26 21:23:32,016 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:32,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:32,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:32,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:32,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:32,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:32,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:32,993 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:23:33,110 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:23:33,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:33,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:33,193 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:33,193 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2018-09-26 21:23:33,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-26 21:23:33,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-26 21:23:33,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=1369, Unknown=0, NotChecked=0, Total=2550 [2018-09-26 21:23:33,194 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 51 states. [2018-09-26 21:23:34,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:34,367 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2018-09-26 21:23:34,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-26 21:23:34,368 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 184 [2018-09-26 21:23:34,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:34,369 INFO L225 Difference]: With dead ends: 193 [2018-09-26 21:23:34,369 INFO L226 Difference]: Without dead ends: 191 [2018-09-26 21:23:34,370 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2162 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3482, Invalid=5830, Unknown=0, NotChecked=0, Total=9312 [2018-09-26 21:23:34,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-26 21:23:34,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2018-09-26 21:23:34,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-26 21:23:34,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-09-26 21:23:34,420 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2018-09-26 21:23:34,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:34,420 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-09-26 21:23:34,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-26 21:23:34,420 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-09-26 21:23:34,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-26 21:23:34,421 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:34,421 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-09-26 21:23:34,421 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:34,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:34,421 INFO L82 PathProgramCache]: Analyzing trace with hash -582123001, now seen corresponding path program 89 times [2018-09-26 21:23:34,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:34,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:34,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:34,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:34,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:37,095 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:37,095 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:37,103 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:23:37,277 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-26 21:23:37,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:37,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:37,337 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:37,337 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-26 21:23:37,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-26 21:23:37,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-26 21:23:37,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-09-26 21:23:37,339 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 94 states. [2018-09-26 21:23:39,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:39,252 INFO L93 Difference]: Finished difference Result 284 states and 286 transitions. [2018-09-26 21:23:39,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-26 21:23:39,252 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-09-26 21:23:39,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:39,253 INFO L225 Difference]: With dead ends: 284 [2018-09-26 21:23:39,253 INFO L226 Difference]: Without dead ends: 189 [2018-09-26 21:23:39,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4509, Invalid=14951, Unknown=0, NotChecked=0, Total=19460 [2018-09-26 21:23:39,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-26 21:23:39,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-26 21:23:39,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-26 21:23:39,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2018-09-26 21:23:39,296 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2018-09-26 21:23:39,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:39,297 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2018-09-26 21:23:39,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-26 21:23:39,297 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2018-09-26 21:23:39,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-26 21:23:39,297 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:39,297 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 1, 1, 1, 1] [2018-09-26 21:23:39,298 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:39,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:39,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1060894655, now seen corresponding path program 90 times [2018-09-26 21:23:39,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:39,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:39,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:39,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:39,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:39,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:40,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:40,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:40,318 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:23:40,494 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-09-26 21:23:40,494 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:40,499 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:40,597 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:40,597 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2018-09-26 21:23:40,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:23:40,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:23:40,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2018-09-26 21:23:40,598 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 52 states. [2018-09-26 21:23:42,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:42,082 INFO L93 Difference]: Finished difference Result 197 states and 198 transitions. [2018-09-26 21:23:42,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-26 21:23:42,082 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 188 [2018-09-26 21:23:42,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:42,083 INFO L225 Difference]: With dead ends: 197 [2018-09-26 21:23:42,084 INFO L226 Difference]: Without dead ends: 195 [2018-09-26 21:23:42,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3628, Invalid=6074, Unknown=0, NotChecked=0, Total=9702 [2018-09-26 21:23:42,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-26 21:23:42,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 191. [2018-09-26 21:23:42,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-26 21:23:42,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2018-09-26 21:23:42,133 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 188 [2018-09-26 21:23:42,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:42,134 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2018-09-26 21:23:42,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:23:42,134 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2018-09-26 21:23:42,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-26 21:23:42,134 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:42,134 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1] [2018-09-26 21:23:42,135 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:42,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:42,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1612581059, now seen corresponding path program 91 times [2018-09-26 21:23:42,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:42,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:42,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:42,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:42,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2162 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:44,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:44,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:44,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:23:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:44,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2162 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:44,805 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:44,805 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-26 21:23:44,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-26 21:23:44,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-26 21:23:44,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=6769, Unknown=0, NotChecked=0, Total=9120 [2018-09-26 21:23:44,806 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 96 states. [2018-09-26 21:23:48,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:48,356 INFO L93 Difference]: Finished difference Result 290 states and 292 transitions. [2018-09-26 21:23:48,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-26 21:23:48,356 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-09-26 21:23:48,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:48,357 INFO L225 Difference]: With dead ends: 290 [2018-09-26 21:23:48,357 INFO L226 Difference]: Without dead ends: 193 [2018-09-26 21:23:48,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3197 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4701, Invalid=15605, Unknown=0, NotChecked=0, Total=20306 [2018-09-26 21:23:48,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-26 21:23:48,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-26 21:23:48,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-26 21:23:48,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2018-09-26 21:23:48,407 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 190 [2018-09-26 21:23:48,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:48,407 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2018-09-26 21:23:48,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-26 21:23:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2018-09-26 21:23:48,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-26 21:23:48,408 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:48,408 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 46, 1, 1, 1, 1] [2018-09-26 21:23:48,408 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:48,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:48,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1003933815, now seen corresponding path program 92 times [2018-09-26 21:23:48,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:48,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:48,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:48,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:23:48,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:49,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:49,480 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:49,480 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:49,488 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:23:49,604 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:23:49,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:49,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:49,708 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:49,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2018-09-26 21:23:49,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:23:49,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:23:49,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=1476, Unknown=0, NotChecked=0, Total=2756 [2018-09-26 21:23:49,709 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand 53 states. [2018-09-26 21:23:50,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:50,994 INFO L93 Difference]: Finished difference Result 201 states and 202 transitions. [2018-09-26 21:23:50,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-26 21:23:50,994 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 192 [2018-09-26 21:23:50,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:50,996 INFO L225 Difference]: With dead ends: 201 [2018-09-26 21:23:50,996 INFO L226 Difference]: Without dead ends: 199 [2018-09-26 21:23:50,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3777, Invalid=6323, Unknown=0, NotChecked=0, Total=10100 [2018-09-26 21:23:50,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-26 21:23:51,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2018-09-26 21:23:51,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-26 21:23:51,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-09-26 21:23:51,047 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2018-09-26 21:23:51,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:51,047 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-09-26 21:23:51,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:23:51,047 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-09-26 21:23:51,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-26 21:23:51,048 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:51,048 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-09-26 21:23:51,048 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:51,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:51,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1587312141, now seen corresponding path program 93 times [2018-09-26 21:23:51,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:51,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:51,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:51,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:51,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:53,939 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:53,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:53,946 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:23:54,135 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-26 21:23:54,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:54,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:54,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:54,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-26 21:23:54,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-26 21:23:54,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-26 21:23:54,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-09-26 21:23:54,198 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 98 states. [2018-09-26 21:23:57,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:23:57,915 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2018-09-26 21:23:57,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-26 21:23:57,915 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-09-26 21:23:57,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:23:57,916 INFO L225 Difference]: With dead ends: 296 [2018-09-26 21:23:57,916 INFO L226 Difference]: Without dead ends: 197 [2018-09-26 21:23:57,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3337 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4897, Invalid=16273, Unknown=0, NotChecked=0, Total=21170 [2018-09-26 21:23:57,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-26 21:23:57,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-26 21:23:57,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-26 21:23:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2018-09-26 21:23:57,967 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2018-09-26 21:23:57,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:23:57,967 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2018-09-26 21:23:57,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-26 21:23:57,967 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2018-09-26 21:23:57,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-26 21:23:57,968 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:23:57,968 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 47, 1, 1, 1, 1] [2018-09-26 21:23:57,968 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:23:57,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:23:57,968 INFO L82 PathProgramCache]: Analyzing trace with hash 410334765, now seen corresponding path program 94 times [2018-09-26 21:23:57,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:23:57,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:23:57,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:57,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:23:57,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:23:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:23:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:59,078 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:23:59,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:23:59,085 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:23:59,209 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:23:59,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:23:59,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:23:59,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:23:59,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:23:59,313 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2018-09-26 21:23:59,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:23:59,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:23:59,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2018-09-26 21:23:59,314 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 54 states. [2018-09-26 21:24:00,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:00,662 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2018-09-26 21:24:00,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-26 21:24:00,663 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 196 [2018-09-26 21:24:00,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:00,664 INFO L225 Difference]: With dead ends: 205 [2018-09-26 21:24:00,664 INFO L226 Difference]: Without dead ends: 203 [2018-09-26 21:24:00,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3929, Invalid=6577, Unknown=0, NotChecked=0, Total=10506 [2018-09-26 21:24:00,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-26 21:24:00,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-09-26 21:24:00,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-26 21:24:00,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2018-09-26 21:24:00,718 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 196 [2018-09-26 21:24:00,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:00,718 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2018-09-26 21:24:00,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:24:00,718 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2018-09-26 21:24:00,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-26 21:24:00,719 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:00,719 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1] [2018-09-26 21:24:00,719 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:00,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:00,719 INFO L82 PathProgramCache]: Analyzing trace with hash -805348823, now seen corresponding path program 95 times [2018-09-26 21:24:00,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:00,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:00,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:00,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:00,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2352 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:03,672 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:03,672 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:24:03,684 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:24:03,874 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-26 21:24:03,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:03,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2352 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:03,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:03,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-26 21:24:03,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-26 21:24:03,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-26 21:24:03,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2549, Invalid=7351, Unknown=0, NotChecked=0, Total=9900 [2018-09-26 21:24:03,940 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 100 states. [2018-09-26 21:24:07,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:07,612 INFO L93 Difference]: Finished difference Result 302 states and 304 transitions. [2018-09-26 21:24:07,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-26 21:24:07,612 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-09-26 21:24:07,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:07,613 INFO L225 Difference]: With dead ends: 302 [2018-09-26 21:24:07,613 INFO L226 Difference]: Without dead ends: 201 [2018-09-26 21:24:07,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3480 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5097, Invalid=16955, Unknown=0, NotChecked=0, Total=22052 [2018-09-26 21:24:07,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-26 21:24:07,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-26 21:24:07,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-26 21:24:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2018-09-26 21:24:07,666 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 198 [2018-09-26 21:24:07,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:07,666 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2018-09-26 21:24:07,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-26 21:24:07,667 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2018-09-26 21:24:07,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-26 21:24:07,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:07,667 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 48, 1, 1, 1, 1] [2018-09-26 21:24:07,667 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:07,668 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:07,668 INFO L82 PathProgramCache]: Analyzing trace with hash -779331229, now seen corresponding path program 96 times [2018-09-26 21:24:07,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:07,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:07,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:07,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:07,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:07,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:08,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:08,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:24:08,824 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:24:09,021 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-09-26 21:24:09,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:09,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:09,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:09,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2018-09-26 21:24:09,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-26 21:24:09,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-26 21:24:09,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2018-09-26 21:24:09,131 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand 55 states. [2018-09-26 21:24:10,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:10,468 INFO L93 Difference]: Finished difference Result 209 states and 210 transitions. [2018-09-26 21:24:10,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-26 21:24:10,469 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 200 [2018-09-26 21:24:10,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:10,470 INFO L225 Difference]: With dead ends: 209 [2018-09-26 21:24:10,470 INFO L226 Difference]: Without dead ends: 207 [2018-09-26 21:24:10,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4084, Invalid=6836, Unknown=0, NotChecked=0, Total=10920 [2018-09-26 21:24:10,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-26 21:24:10,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2018-09-26 21:24:10,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-26 21:24:10,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-09-26 21:24:10,525 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2018-09-26 21:24:10,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:10,526 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-09-26 21:24:10,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-26 21:24:10,526 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-09-26 21:24:10,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-26 21:24:10,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:10,526 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-09-26 21:24:10,527 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:10,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:10,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1613068321, now seen corresponding path program 97 times [2018-09-26 21:24:10,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:10,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:10,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:10,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:10,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:13,664 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:13,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:24:13,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:24:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:13,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:13,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:13,853 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:13,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-26 21:24:13,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-26 21:24:13,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-26 21:24:13,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-09-26 21:24:13,855 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 102 states. [2018-09-26 21:24:17,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:17,819 INFO L93 Difference]: Finished difference Result 308 states and 310 transitions. [2018-09-26 21:24:17,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-26 21:24:17,819 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-09-26 21:24:17,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:17,820 INFO L225 Difference]: With dead ends: 308 [2018-09-26 21:24:17,820 INFO L226 Difference]: Without dead ends: 205 [2018-09-26 21:24:17,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5301, Invalid=17651, Unknown=0, NotChecked=0, Total=22952 [2018-09-26 21:24:17,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-26 21:24:17,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-26 21:24:17,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-26 21:24:17,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2018-09-26 21:24:17,876 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 202 [2018-09-26 21:24:17,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:17,876 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2018-09-26 21:24:17,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-26 21:24:17,876 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2018-09-26 21:24:17,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-26 21:24:17,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:17,877 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 50, 49, 1, 1, 1, 1] [2018-09-26 21:24:17,877 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:17,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:17,878 INFO L82 PathProgramCache]: Analyzing trace with hash 134306329, now seen corresponding path program 98 times [2018-09-26 21:24:17,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:17,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:17,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:17,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:24:17,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:24:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:19,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:24:19,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 21:24:19,154 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:24:19,278 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:24:19,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:24:19,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:24:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:24:19,389 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:24:19,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2018-09-26 21:24:19,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:24:19,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:24:19,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=1644, Unknown=0, NotChecked=0, Total=3080 [2018-09-26 21:24:19,390 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand 56 states. [2018-09-26 21:24:20,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:24:20,783 INFO L93 Difference]: Finished difference Result 213 states and 214 transitions. [2018-09-26 21:24:20,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-26 21:24:20,784 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 204 [2018-09-26 21:24:20,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:24:20,784 INFO L225 Difference]: With dead ends: 213 [2018-09-26 21:24:20,785 INFO L226 Difference]: Without dead ends: 211 [2018-09-26 21:24:20,785 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2652 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4242, Invalid=7100, Unknown=0, NotChecked=0, Total=11342 [2018-09-26 21:24:20,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-26 21:24:20,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 207. [2018-09-26 21:24:20,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-26 21:24:20,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2018-09-26 21:24:20,842 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 204 [2018-09-26 21:24:20,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:24:20,842 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2018-09-26 21:24:20,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:24:20,842 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2018-09-26 21:24:20,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-26 21:24:20,843 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:24:20,843 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1, 1, 1] [2018-09-26 21:24:20,843 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:24:20,843 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-26 21:24:20,844 INFO L82 PathProgramCache]: Analyzing trace with hash 219296533, now seen corresponding path program 99 times [2018-09-26 21:24:20,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:24:20,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:24:20,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:20,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:24:20,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:24:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-26 21:24:21,910 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 21:24:21,914 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 21:24:21,914 INFO L202 PluginConnector]: Adding new model down.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 09:24:21 BoogieIcfgContainer [2018-09-26 21:24:21,915 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 21:24:21,915 INFO L168 Benchmark]: Toolchain (without parser) took 235952.68 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 206.0 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 75.1 MB). Peak memory consumption was 281.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:24:21,917 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 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 21:24:21,917 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.30 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 21:24:21,917 INFO L168 Benchmark]: Boogie Preprocessor took 23.14 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 21:24:21,918 INFO L168 Benchmark]: RCFGBuilder took 353.43 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-26 21:24:21,918 INFO L168 Benchmark]: TraceAbstraction took 235527.57 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 206.0 MB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 53.9 MB). Peak memory consumption was 260.0 MB. Max. memory is 7.1 GB. [2018-09-26 21:24:21,920 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 0.19 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 42.30 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 23.14 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 353.43 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 235527.57 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 206.0 MB). Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 53.9 MB). Peak memory consumption was 260.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 66). Cancelled while BasicCegarLoop was analyzing trace of length 207 with TraceHistMax 51, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 54 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 235.4s OverallTime, 101 OverallIterations, 51 TraceHistogramMax, 120.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1727 SDtfs, 1115 SDslu, 8075 SDs, 0 SdLazy, 76014 SolverSat, 5793 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 45.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18287 GetRequests, 11664 SyntacticMatches, 0 SemanticMatches, 6623 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108096 ImplicationChecksByTransitivity, 148.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=207occurred in iteration=100, 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: 2.3s AutomataMinimizationTime, 100 MinimizatonAttempts, 200 StatesRemovedByMinimization, 50 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.5s SsaConstructionTime, 8.0s SatisfiabilityAnalysisTime, 97.4s InterpolantComputationTime, 20986 NumberOfCodeBlocks, 20986 NumberOfCodeBlocksAsserted, 1455 NumberOfCheckSat, 20788 ConstructedInterpolants, 0 QuantifiedInterpolants, 8474199 SizeOfPredicates, 294 NumberOfNonLiveVariables, 41454 ConjunctsInSsa, 5488 ConjunctsInUnsatCore, 198 InterpolantComputations, 2 PerfectInterpolantSequences, 171698/338298 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.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_21-24-21-928.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_21-24-21-928.csv Completed graceful shutdown