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/count_by_2.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 08:42:50,002 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 08:42:50,005 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 08:42:50,018 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 08:42:50,019 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 08:42:50,020 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 08:42:50,021 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 08:42:50,023 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 08:42:50,025 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 08:42:50,026 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 08:42:50,027 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-03 08:42:50,063 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 [2018-10-03 08:42:50,097 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 08:42:50,097 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 08:42:50,098 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 08:42:50,098 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 08:42:50,099 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 08:42:50,099 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 08:42:50,100 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 08:42:50,100 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 08:42:50,100 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 08:42:50,100 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 08:42:50,100 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 08:42:50,101 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 08:42:50,101 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 08:42:50,101 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 08:42:50,101 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 08:42:50,101 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 08:42:50,103 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 08:42:50,103 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 08:42:50,103 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 08:42:50,103 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 08:42:50,104 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 08:42:50,104 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 08:42:50,104 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:42:50,104 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 08:42:50,104 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 08:42:50,105 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 08:42:50,105 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 08:42:50,105 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 08:42:50,105 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 08:42:50,105 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 08:42:50,154 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 08:42:50,170 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 08:42:50,177 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 08:42:50,179 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 08:42:50,180 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 08:42:50,181 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_2.i_3.bpl [2018-10-03 08:42:50,182 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_2.i_3.bpl' [2018-10-03 08:42:50,244 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 08:42:50,247 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 08:42:50,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 08:42:50,248 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 08:42:50,249 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 08:42:50,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:42:50" (1/1) ... [2018-10-03 08:42:50,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:42:50" (1/1) ... [2018-10-03 08:42:50,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 08:42:50,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 08:42:50,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 08:42:50,295 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 08:42:50,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:42:50" (1/1) ... [2018-10-03 08:42:50,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:42:50" (1/1) ... [2018-10-03 08:42:50,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:42:50" (1/1) ... [2018-10-03 08:42:50,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:42:50" (1/1) ... [2018-10-03 08:42:50,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:42:50" (1/1) ... [2018-10-03 08:42:50,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:42:50" (1/1) ... [2018-10-03 08:42:50,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:42:50" (1/1) ... [2018-10-03 08:42:50,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 08:42:50,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 08:42:50,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 08:42:50,322 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 08:42:50,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:42:50" (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 [2018-10-03 08:42:50,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-03 08:42:50,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-03 08:42:50,634 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-03 08:42:50,635 INFO L202 PluginConnector]: Adding new model count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:42:50 BoogieIcfgContainer [2018-10-03 08:42:50,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 08:42:50,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 08:42:50,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 08:42:50,641 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 08:42:50,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:42:50" (1/2) ... [2018-10-03 08:42:50,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7924994d and model type count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 08:42:50, skipping insertion in model container [2018-10-03 08:42:50,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:42:50" (2/2) ... [2018-10-03 08:42:50,648 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_2.i_3.bpl [2018-10-03 08:42:50,659 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 08:42:50,671 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 08:42:50,719 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 08:42:50,720 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 08:42:50,721 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 08:42:50,721 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 08:42:50,721 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 08:42:50,721 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 08:42:50,721 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 08:42:50,722 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 08:42:50,722 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 08:42:50,739 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-03 08:42:50,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-03 08:42:50,755 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:50,756 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-03 08:42:50,757 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:50,763 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:50,764 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-03 08:42:50,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:50,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:50,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:50,814 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:50,814 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:50,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:50,917 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:42:50,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-03 08:42:50,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 08:42:50,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 08:42:50,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:42:50,940 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-03 08:42:50,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:50,986 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-03 08:42:50,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 08:42:50,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-03 08:42:50,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:50,999 INFO L225 Difference]: With dead ends: 11 [2018-10-03 08:42:50,999 INFO L226 Difference]: Without dead ends: 7 [2018-10-03 08:42:51,003 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:42:51,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-03 08:42:51,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-03 08:42:51,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-03 08:42:51,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-03 08:42:51,038 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-03 08:42:51,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:51,038 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-03 08:42:51,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 08:42:51,038 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-03 08:42:51,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 08:42:51,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:51,039 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-03 08:42:51,040 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:51,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:51,040 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-03 08:42:51,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:51,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:51,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:51,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:51,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:51,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:51,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:51,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:42:51,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:51,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:51,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:51,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:51,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-03 08:42:51,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 08:42:51,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 08:42:51,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:42:51,298 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-03 08:42:51,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:51,398 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-03 08:42:51,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 08:42:51,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-03 08:42:51,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:51,399 INFO L225 Difference]: With dead ends: 11 [2018-10-03 08:42:51,399 INFO L226 Difference]: Without dead ends: 9 [2018-10-03 08:42:51,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:42:51,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-03 08:42:51,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-03 08:42:51,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-03 08:42:51,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-03 08:42:51,404 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-03 08:42:51,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:51,405 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-03 08:42:51,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 08:42:51,405 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-03 08:42:51,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 08:42:51,406 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:51,406 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-03 08:42:51,406 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:51,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:51,407 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-03 08:42:51,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:51,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:51,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:51,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:51,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:51,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:51,640 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:42:51,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:42:51,680 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:42:51,681 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:51,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:51,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:51,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 08:42:51,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:42:51,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:42:51,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:42:51,723 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-03 08:42:51,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:51,763 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-03 08:42:51,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:42:51,765 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-03 08:42:51,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:51,765 INFO L225 Difference]: With dead ends: 13 [2018-10-03 08:42:51,765 INFO L226 Difference]: Without dead ends: 11 [2018-10-03 08:42:51,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:42:51,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-03 08:42:51,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-03 08:42:51,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 08:42:51,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-03 08:42:51,770 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-03 08:42:51,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:51,770 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-03 08:42:51,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:42:51,771 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-03 08:42:51,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-03 08:42:51,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:51,772 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-03 08:42:51,772 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:51,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:51,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-03 08:42:51,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:51,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:51,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:51,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:51,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:51,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:51,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:51,868 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:42:51,888 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:42:51,913 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-03 08:42:51,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:51,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:51,942 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:51,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:42:51,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:42:51,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:42:51,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:42:51,944 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-03 08:42:51,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:51,977 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-03 08:42:51,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:42:51,978 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-03 08:42:51,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:51,979 INFO L225 Difference]: With dead ends: 15 [2018-10-03 08:42:51,979 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 08:42:51,979 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:42:51,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 08:42:51,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-03 08:42:51,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-03 08:42:51,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-03 08:42:51,984 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-03 08:42:51,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:51,984 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-03 08:42:51,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:42:51,985 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-03 08:42:51,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-03 08:42:51,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:51,986 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-03 08:42:51,986 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:51,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:51,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-03 08:42:51,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:51,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:51,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:51,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:51,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:52,232 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:52,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:52,236 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 [2018-10-03 08:42:52,251 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:42:52,285 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:42:52,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:52,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:52,329 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:52,329 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:42:52,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:42:52,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:42:52,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:42:52,331 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-03 08:42:52,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:52,412 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-03 08:42:52,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:42:52,413 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-03 08:42:52,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:52,414 INFO L225 Difference]: With dead ends: 17 [2018-10-03 08:42:52,414 INFO L226 Difference]: Without dead ends: 15 [2018-10-03 08:42:52,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:42:52,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-03 08:42:52,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-03 08:42:52,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-03 08:42:52,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-03 08:42:52,419 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-03 08:42:52,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:52,419 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-03 08:42:52,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:42:52,420 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-03 08:42:52,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-03 08:42:52,422 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:52,422 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-03 08:42:52,423 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:52,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:52,423 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-03 08:42:52,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:52,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:52,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:52,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:52,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:52,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:52,560 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 [2018-10-03 08:42:52,568 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:42:52,595 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-03 08:42:52,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:52,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:52,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:52,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:42:52,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:42:52,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:42:52,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:42:52,640 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-03 08:42:52,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:52,672 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-03 08:42:52,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:42:52,674 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-03 08:42:52,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:52,675 INFO L225 Difference]: With dead ends: 19 [2018-10-03 08:42:52,675 INFO L226 Difference]: Without dead ends: 17 [2018-10-03 08:42:52,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:42:52,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-03 08:42:52,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-03 08:42:52,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-03 08:42:52,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-03 08:42:52,680 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-03 08:42:52,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:52,680 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-03 08:42:52,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:42:52,681 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-03 08:42:52,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-03 08:42:52,681 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:52,681 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-03 08:42:52,682 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:52,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:52,682 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-03 08:42:52,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:52,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:52,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:52,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:52,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:52,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:52,912 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 [2018-10-03 08:42:52,926 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:42:52,943 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:42:52,944 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:52,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:52,956 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:52,977 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:52,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:42:52,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:42:52,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:42:52,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:42:52,979 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-03 08:42:53,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:53,023 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-03 08:42:53,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:42:53,025 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-03 08:42:53,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:53,026 INFO L225 Difference]: With dead ends: 21 [2018-10-03 08:42:53,026 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 08:42:53,026 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:42:53,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 08:42:53,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-03 08:42:53,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 08:42:53,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-03 08:42:53,031 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-03 08:42:53,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:53,032 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-03 08:42:53,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:42:53,032 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-03 08:42:53,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 08:42:53,032 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:53,032 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-03 08:42:53,033 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:53,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:53,033 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-03 08:42:53,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:53,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:53,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:53,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:53,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:53,212 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:53,213 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 [2018-10-03 08:42:53,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:53,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:53,288 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:53,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:42:53,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:42:53,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:42:53,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:42:53,290 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-03 08:42:53,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:53,523 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-03 08:42:53,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:42:53,526 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-03 08:42:53,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:53,527 INFO L225 Difference]: With dead ends: 23 [2018-10-03 08:42:53,527 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 08:42:53,527 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:42:53,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 08:42:53,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-03 08:42:53,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-03 08:42:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-03 08:42:53,535 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-03 08:42:53,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:53,537 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-03 08:42:53,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:42:53,537 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-03 08:42:53,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 08:42:53,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:53,538 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-03 08:42:53,538 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:53,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:53,539 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-03 08:42:53,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:53,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:53,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:53,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:53,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:53,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:53,710 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 [2018-10-03 08:42:53,727 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:42:53,738 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:42:53,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:53,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:53,758 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:53,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:53,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:42:53,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:42:53,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:42:53,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:42:53,795 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-03 08:42:53,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:53,926 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-03 08:42:53,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:42:53,927 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-03 08:42:53,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:53,928 INFO L225 Difference]: With dead ends: 25 [2018-10-03 08:42:53,928 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:42:53,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:42:53,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:42:53,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-03 08:42:53,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-03 08:42:53,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-03 08:42:53,933 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-03 08:42:53,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:53,934 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-03 08:42:53,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:42:53,934 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-03 08:42:53,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 08:42:53,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:53,935 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-03 08:42:53,935 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:53,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:53,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-03 08:42:53,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:53,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:53,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:53,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:53,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:54,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:54,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:42:54,130 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:42:54,156 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-03 08:42:54,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:54,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:54,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:54,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-03 08:42:54,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 08:42:54,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 08:42:54,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:42:54,193 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-10-03 08:42:54,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:54,248 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-03 08:42:54,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 08:42:54,249 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-03 08:42:54,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:54,249 INFO L225 Difference]: With dead ends: 27 [2018-10-03 08:42:54,249 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 08:42:54,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:42:54,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 08:42:54,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-03 08:42:54,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-03 08:42:54,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-03 08:42:54,255 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-03 08:42:54,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:54,256 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-03 08:42:54,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 08:42:54,256 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-03 08:42:54,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-03 08:42:54,256 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:54,257 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-03 08:42:54,257 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:54,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:54,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-10-03 08:42:54,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:54,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:54,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:54,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:54,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:54,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:54,536 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 [2018-10-03 08:42:54,544 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:42:54,554 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:42:54,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:54,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:54,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:54,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-03 08:42:54,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 08:42:54,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 08:42:54,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:42:54,593 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-10-03 08:42:54,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:54,641 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-03 08:42:54,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 08:42:54,642 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-03 08:42:54,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:54,643 INFO L225 Difference]: With dead ends: 29 [2018-10-03 08:42:54,643 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:42:54,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:42:54,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:42:54,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-03 08:42:54,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-03 08:42:54,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-03 08:42:54,648 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-03 08:42:54,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:54,649 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-03 08:42:54,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 08:42:54,649 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-03 08:42:54,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 08:42:54,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:54,650 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-03 08:42:54,650 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:54,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:54,650 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-10-03 08:42:54,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:54,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:54,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:54,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:54,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:54,901 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:54,901 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 [2018-10-03 08:42:54,912 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:42:54,933 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-03 08:42:54,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:54,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:54,974 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:54,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-03 08:42:54,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:42:54,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:42:54,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:42:54,976 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-10-03 08:42:55,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:55,173 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-03 08:42:55,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 08:42:55,174 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-03 08:42:55,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:55,175 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:42:55,175 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:42:55,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:42:55,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:42:55,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-03 08:42:55,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-03 08:42:55,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-03 08:42:55,184 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-03 08:42:55,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:55,185 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-03 08:42:55,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:42:55,185 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-03 08:42:55,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-03 08:42:55,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:55,186 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-03 08:42:55,186 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:55,187 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:55,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-10-03 08:42:55,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:55,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:55,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:55,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:55,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:55,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:55,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:55,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:42:55,486 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:42:55,501 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-03 08:42:55,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:55,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:55,514 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:55,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:55,544 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-03 08:42:55,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 08:42:55,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 08:42:55,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:42:55,546 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-10-03 08:42:55,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:55,755 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-03 08:42:55,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 08:42:55,756 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-03 08:42:55,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:55,757 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:42:55,757 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:42:55,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:42:55,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:42:55,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-03 08:42:55,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 08:42:55,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-03 08:42:55,764 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-03 08:42:55,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:55,765 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-03 08:42:55,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 08:42:55,765 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-03 08:42:55,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 08:42:55,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:55,766 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-03 08:42:55,766 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:55,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:55,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-10-03 08:42:55,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:55,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:55,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:55,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:55,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:56,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:56,130 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 [2018-10-03 08:42:56,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:56,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:56,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:56,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 08:42:56,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 08:42:56,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 08:42:56,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:42:56,193 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-10-03 08:42:56,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:56,236 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-03 08:42:56,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 08:42:56,237 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-03 08:42:56,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:56,238 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:42:56,238 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:42:56,239 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:42:56,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:42:56,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-03 08:42:56,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-03 08:42:56,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-03 08:42:56,245 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-03 08:42:56,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:56,245 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-03 08:42:56,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 08:42:56,245 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-03 08:42:56,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-03 08:42:56,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:56,246 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-03 08:42:56,246 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:56,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:56,247 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-10-03 08:42:56,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:56,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:56,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:56,248 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:56,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:56,473 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:56,473 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 [2018-10-03 08:42:56,482 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:42:56,525 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:42:56,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:56,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:56,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:56,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-03 08:42:56,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 08:42:56,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 08:42:56,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:42:56,570 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-10-03 08:42:56,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:56,610 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-03 08:42:56,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 08:42:56,610 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-03 08:42:56,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:56,611 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:42:56,612 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:42:56,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:42:56,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:42:56,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-03 08:42:56,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 08:42:56,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-03 08:42:56,619 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-03 08:42:56,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:56,620 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-03 08:42:56,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 08:42:56,620 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-03 08:42:56,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 08:42:56,621 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:56,621 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-03 08:42:56,621 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:56,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:56,622 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-10-03 08:42:56,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:56,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:56,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:56,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:56,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:56,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:56,861 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 [2018-10-03 08:42:56,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:42:56,884 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-03 08:42:56,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:56,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:56,898 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:56,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:56,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-03 08:42:56,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 08:42:56,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 08:42:56,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:42:56,924 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-10-03 08:42:56,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:56,992 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-03 08:42:56,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 08:42:56,993 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-03 08:42:56,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:56,994 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:42:56,994 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:42:56,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:42:56,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:42:56,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-03 08:42:56,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-03 08:42:56,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-03 08:42:56,999 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-03 08:42:56,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:56,999 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-03 08:42:56,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 08:42:57,000 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-03 08:42:57,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-03 08:42:57,000 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:57,001 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-10-03 08:42:57,001 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:57,001 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:57,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-10-03 08:42:57,001 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:57,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:57,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:57,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:57,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:57,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:57,218 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 [2018-10-03 08:42:57,227 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:42:57,264 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:42:57,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:57,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:57,280 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:57,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:57,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-03 08:42:57,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 08:42:57,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 08:42:57,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:42:57,312 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-10-03 08:42:57,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:57,403 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-03 08:42:57,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 08:42:57,404 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-03 08:42:57,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:57,405 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:42:57,405 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:42:57,406 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:42:57,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:42:57,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-03 08:42:57,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-03 08:42:57,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-03 08:42:57,411 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-10-03 08:42:57,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:57,411 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-03 08:42:57,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 08:42:57,411 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-03 08:42:57,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 08:42:57,412 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:57,412 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-03 08:42:57,412 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:57,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:57,413 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-10-03 08:42:57,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:57,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:57,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:57,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:57,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:57,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:57,913 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 [2018-10-03 08:42:57,920 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:42:57,953 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-03 08:42:57,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:57,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:58,005 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:58,005 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-03 08:42:58,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:42:58,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:42:58,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:42:58,006 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-10-03 08:42:58,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:58,332 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-03 08:42:58,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 08:42:58,332 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-03 08:42:58,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:58,333 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:42:58,333 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:42:58,333 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:42:58,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:42:58,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-03 08:42:58,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-03 08:42:58,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-03 08:42:58,338 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-10-03 08:42:58,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:58,338 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-03 08:42:58,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:42:58,338 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-03 08:42:58,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-03 08:42:58,339 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:58,339 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-10-03 08:42:58,340 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:58,340 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:58,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-10-03 08:42:58,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:58,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:58,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:58,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:58,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:58,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:58,599 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 [2018-10-03 08:42:58,607 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:42:58,668 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-03 08:42:58,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:58,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:58,719 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:58,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-03 08:42:58,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 08:42:58,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 08:42:58,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:42:58,720 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-10-03 08:42:58,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:58,778 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-03 08:42:58,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 08:42:58,778 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-03 08:42:58,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:58,779 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:42:58,779 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:42:58,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:42:58,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:42:58,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-03 08:42:58,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-03 08:42:58,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-03 08:42:58,785 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-10-03 08:42:58,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:58,785 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-03 08:42:58,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 08:42:58,785 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-03 08:42:58,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-03 08:42:58,786 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:58,786 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-10-03 08:42:58,786 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:58,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:58,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-10-03 08:42:58,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:58,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:58,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:58,787 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:58,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:59,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:59,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:42:59,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:59,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:59,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:59,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-03 08:42:59,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 08:42:59,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 08:42:59,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:42:59,195 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-10-03 08:42:59,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:59,319 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-03 08:42:59,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 08:42:59,319 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-03 08:42:59,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:59,320 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:42:59,320 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:42:59,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:42:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:42:59,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-03 08:42:59,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-03 08:42:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-03 08:42:59,325 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-10-03 08:42:59,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:59,325 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-03 08:42:59,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 08:42:59,326 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-03 08:42:59,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-03 08:42:59,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:59,326 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-10-03 08:42:59,326 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:59,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:59,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-10-03 08:42:59,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:59,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:59,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:59,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:59,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:59,948 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:59,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:42:59,961 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:42:59,975 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:42:59,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:59,978 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:59,988 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:00,020 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:00,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-03 08:43:00,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 08:43:00,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 08:43:00,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:43:00,022 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-10-03 08:43:00,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:00,182 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-03 08:43:00,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 08:43:00,183 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-03 08:43:00,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:00,184 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:43:00,184 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:43:00,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:43:00,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:43:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-03 08:43:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-03 08:43:00,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-03 08:43:00,190 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-10-03 08:43:00,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:00,190 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-03 08:43:00,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 08:43:00,190 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-03 08:43:00,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-03 08:43:00,191 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:00,191 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-10-03 08:43:00,191 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:00,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:00,192 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-10-03 08:43:00,192 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:00,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:00,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:00,193 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:00,193 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:00,554 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:00,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:00,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:00,563 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:00,589 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-03 08:43:00,590 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:00,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:00,627 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:00,627 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-03 08:43:00,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 08:43:00,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 08:43:00,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:43:00,629 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-10-03 08:43:00,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:00,891 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-03 08:43:00,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 08:43:00,893 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-03 08:43:00,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:00,893 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:43:00,893 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:43:00,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:43:00,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:43:00,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-03 08:43:00,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-03 08:43:00,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-03 08:43:00,901 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-10-03 08:43:00,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:00,901 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-03 08:43:00,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 08:43:00,901 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-03 08:43:00,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-03 08:43:00,902 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:00,902 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-10-03 08:43:00,902 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:00,902 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:00,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-10-03 08:43:00,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:00,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:00,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:00,903 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:00,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:01,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:01,237 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 [2018-10-03 08:43:01,246 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:01,261 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:01,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:01,265 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:01,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:01,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-03 08:43:01,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 08:43:01,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 08:43:01,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:43:01,304 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-10-03 08:43:01,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:01,364 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-03 08:43:01,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 08:43:01,365 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-03 08:43:01,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:01,366 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:43:01,366 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:43:01,367 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:43:01,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:43:01,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-03 08:43:01,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-03 08:43:01,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-03 08:43:01,371 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-10-03 08:43:01,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:01,372 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-03 08:43:01,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 08:43:01,372 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-03 08:43:01,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-03 08:43:01,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:01,373 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-10-03 08:43:01,373 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:01,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:01,374 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-10-03 08:43:01,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:01,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:01,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:01,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:01,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:02,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:02,855 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 [2018-10-03 08:43:02,863 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:02,888 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-03 08:43:02,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:02,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:02,950 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:02,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-03 08:43:02,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:43:02,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:43:02,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:43:02,951 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-10-03 08:43:03,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:03,098 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-03 08:43:03,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 08:43:03,099 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-03 08:43:03,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:03,100 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:43:03,100 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:43:03,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:43:03,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:43:03,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-03 08:43:03,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-03 08:43:03,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-03 08:43:03,105 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-10-03 08:43:03,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:03,105 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-03 08:43:03,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:43:03,106 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-03 08:43:03,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-03 08:43:03,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:03,106 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-10-03 08:43:03,107 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:03,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:03,107 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-10-03 08:43:03,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:03,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:03,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:03,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:03,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:03,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:03,842 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 [2018-10-03 08:43:03,849 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:03,920 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-03 08:43:03,921 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:03,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:03,964 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:03,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-03 08:43:03,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 08:43:03,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 08:43:03,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:43:03,966 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-10-03 08:43:04,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:04,032 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-03 08:43:04,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 08:43:04,032 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-10-03 08:43:04,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:04,033 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:43:04,033 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:43:04,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:43:04,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:43:04,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-03 08:43:04,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-03 08:43:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-03 08:43:04,038 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-10-03 08:43:04,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:04,038 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-03 08:43:04,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 08:43:04,038 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-03 08:43:04,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-03 08:43:04,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:04,039 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-10-03 08:43:04,039 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:04,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:04,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-10-03 08:43:04,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:04,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:04,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:04,040 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:04,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:05,105 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:05,105 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 [2018-10-03 08:43:05,114 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:05,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:05,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:05,143 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:05,172 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:05,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-03 08:43:05,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 08:43:05,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 08:43:05,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:43:05,174 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-10-03 08:43:05,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:05,242 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-03 08:43:05,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 08:43:05,243 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-10-03 08:43:05,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:05,243 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:43:05,243 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:43:05,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:43:05,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:43:05,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-03 08:43:05,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-03 08:43:05,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-03 08:43:05,248 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-10-03 08:43:05,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:05,248 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-03 08:43:05,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 08:43:05,248 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-03 08:43:05,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-03 08:43:05,249 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:05,249 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-10-03 08:43:05,249 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:05,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:05,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-10-03 08:43:05,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:05,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:05,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:05,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:05,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:06,146 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:06,146 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 [2018-10-03 08:43:06,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:06,174 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:06,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:06,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:06,188 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:06,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:06,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-03 08:43:06,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 08:43:06,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 08:43:06,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:43:06,219 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-10-03 08:43:06,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:06,274 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-03 08:43:06,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 08:43:06,274 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-10-03 08:43:06,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:06,275 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:43:06,275 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:43:06,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:43:06,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:43:06,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-03 08:43:06,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-03 08:43:06,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-03 08:43:06,279 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-10-03 08:43:06,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:06,280 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-03 08:43:06,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 08:43:06,280 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-03 08:43:06,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 08:43:06,281 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:06,281 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-10-03 08:43:06,281 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:06,281 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:06,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-10-03 08:43:06,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:06,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:06,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:06,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:06,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:06,702 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:06,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:06,703 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 [2018-10-03 08:43:06,711 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:06,734 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-10-03 08:43:06,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:06,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:06,750 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:06,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:06,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-03 08:43:06,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 08:43:06,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 08:43:06,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:43:06,779 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-10-03 08:43:06,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:06,832 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-03 08:43:06,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 08:43:06,832 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-10-03 08:43:06,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:06,833 INFO L225 Difference]: With dead ends: 63 [2018-10-03 08:43:06,833 INFO L226 Difference]: Without dead ends: 61 [2018-10-03 08:43:06,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:43:06,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-03 08:43:06,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-03 08:43:06,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-03 08:43:06,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-03 08:43:06,838 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-10-03 08:43:06,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:06,838 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-03 08:43:06,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 08:43:06,839 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-03 08:43:06,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-03 08:43:06,839 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:06,839 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-10-03 08:43:06,839 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:06,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:06,840 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-10-03 08:43:06,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:06,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:06,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:06,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:06,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:07,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:07,592 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 [2018-10-03 08:43:07,599 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:07,616 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:07,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:07,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:07,629 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:07,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:07,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-03 08:43:07,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 08:43:07,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 08:43:07,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:43:07,650 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-10-03 08:43:07,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:07,721 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-03 08:43:07,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 08:43:07,721 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-10-03 08:43:07,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:07,722 INFO L225 Difference]: With dead ends: 65 [2018-10-03 08:43:07,722 INFO L226 Difference]: Without dead ends: 63 [2018-10-03 08:43:07,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:43:07,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-03 08:43:07,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-03 08:43:07,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-03 08:43:07,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-03 08:43:07,727 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-10-03 08:43:07,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:07,727 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-03 08:43:07,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 08:43:07,727 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-03 08:43:07,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 08:43:07,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:07,728 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-10-03 08:43:07,728 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:07,728 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:07,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-10-03 08:43:07,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:07,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:07,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:07,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:07,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:08,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:08,563 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 [2018-10-03 08:43:08,571 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:08,595 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-10-03 08:43:08,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:08,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:08,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:08,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-03 08:43:08,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 08:43:08,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 08:43:08,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:43:08,634 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-10-03 08:43:08,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:08,698 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-03 08:43:08,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 08:43:08,699 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-10-03 08:43:08,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:08,700 INFO L225 Difference]: With dead ends: 67 [2018-10-03 08:43:08,700 INFO L226 Difference]: Without dead ends: 65 [2018-10-03 08:43:08,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:43:08,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-03 08:43:08,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-03 08:43:08,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-03 08:43:08,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-03 08:43:08,705 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-10-03 08:43:08,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:08,705 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-03 08:43:08,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 08:43:08,705 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-03 08:43:08,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-03 08:43:08,706 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:08,706 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-10-03 08:43:08,706 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:08,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:08,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-10-03 08:43:08,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:08,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:08,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:08,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:08,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:09,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:09,371 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 [2018-10-03 08:43:09,380 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:09,411 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-03 08:43:09,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:09,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:09,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:09,447 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-03 08:43:09,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 08:43:09,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 08:43:09,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:43:09,448 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-10-03 08:43:09,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:09,617 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-03 08:43:09,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 08:43:09,618 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-10-03 08:43:09,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:09,618 INFO L225 Difference]: With dead ends: 69 [2018-10-03 08:43:09,618 INFO L226 Difference]: Without dead ends: 67 [2018-10-03 08:43:09,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:43:09,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-03 08:43:09,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-03 08:43:09,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-03 08:43:09,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-03 08:43:09,622 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-10-03 08:43:09,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:09,623 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-03 08:43:09,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 08:43:09,623 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-03 08:43:09,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-03 08:43:09,624 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:09,624 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-10-03 08:43:09,624 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:09,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:09,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-10-03 08:43:09,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:09,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:09,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:09,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:09,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:10,946 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:10,946 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 [2018-10-03 08:43:10,954 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:10,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:11,007 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:11,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-03 08:43:11,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 08:43:11,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 08:43:11,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:43:11,008 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-10-03 08:43:11,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:11,070 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-03 08:43:11,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 08:43:11,070 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-10-03 08:43:11,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:11,071 INFO L225 Difference]: With dead ends: 71 [2018-10-03 08:43:11,071 INFO L226 Difference]: Without dead ends: 69 [2018-10-03 08:43:11,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:43:11,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-03 08:43:11,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-03 08:43:11,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-03 08:43:11,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-03 08:43:11,075 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-10-03 08:43:11,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:11,076 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-03 08:43:11,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 08:43:11,076 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-03 08:43:11,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-03 08:43:11,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:11,076 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-10-03 08:43:11,076 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:11,076 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:11,077 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-10-03 08:43:11,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:11,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:11,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:11,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:11,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:11,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:11,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:11,573 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 [2018-10-03 08:43:11,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:11,609 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:11,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:11,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:11,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:11,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-03 08:43:11,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 08:43:11,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 08:43:11,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:43:11,662 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-10-03 08:43:11,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:11,723 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-03 08:43:11,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 08:43:11,723 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-10-03 08:43:11,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:11,724 INFO L225 Difference]: With dead ends: 73 [2018-10-03 08:43:11,724 INFO L226 Difference]: Without dead ends: 71 [2018-10-03 08:43:11,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:43:11,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-03 08:43:11,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-03 08:43:11,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-03 08:43:11,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-03 08:43:11,729 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-10-03 08:43:11,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:11,729 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-03 08:43:11,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 08:43:11,730 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-03 08:43:11,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-03 08:43:11,730 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:11,730 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-10-03 08:43:11,731 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:11,731 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:11,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-10-03 08:43:11,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:11,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:11,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:11,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:11,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:12,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:12,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:12,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:12,327 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:12,357 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-10-03 08:43:12,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:12,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:12,392 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:12,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-03 08:43:12,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 08:43:12,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 08:43:12,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:43:12,393 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-10-03 08:43:12,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:12,467 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-03 08:43:12,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 08:43:12,468 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-10-03 08:43:12,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:12,469 INFO L225 Difference]: With dead ends: 75 [2018-10-03 08:43:12,469 INFO L226 Difference]: Without dead ends: 73 [2018-10-03 08:43:12,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:43:12,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-03 08:43:12,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-03 08:43:12,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-03 08:43:12,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-03 08:43:12,473 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-10-03 08:43:12,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:12,473 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-03 08:43:12,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 08:43:12,473 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-03 08:43:12,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-03 08:43:12,474 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:12,474 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-10-03 08:43:12,474 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:12,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:12,474 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-10-03 08:43:12,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:12,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:12,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:12,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:12,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:13,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:13,423 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 [2018-10-03 08:43:13,430 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:13,449 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:13,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:13,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:13,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:13,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-03 08:43:13,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 08:43:13,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 08:43:13,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:43:13,483 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-10-03 08:43:13,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:13,638 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-03 08:43:13,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 08:43:13,639 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-10-03 08:43:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:13,639 INFO L225 Difference]: With dead ends: 77 [2018-10-03 08:43:13,639 INFO L226 Difference]: Without dead ends: 75 [2018-10-03 08:43:13,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:43:13,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-03 08:43:13,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-03 08:43:13,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-03 08:43:13,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-03 08:43:13,643 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-10-03 08:43:13,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:13,643 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-03 08:43:13,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 08:43:13,644 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-03 08:43:13,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-03 08:43:13,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:13,644 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-10-03 08:43:13,644 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:13,645 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:13,645 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-10-03 08:43:13,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:13,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:13,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:13,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:13,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:14,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:14,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:14,453 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:14,485 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-03 08:43:14,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:14,487 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:14,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:14,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-03 08:43:14,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:43:14,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:43:14,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:43:14,531 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-10-03 08:43:14,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:14,657 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-03 08:43:14,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 08:43:14,660 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-10-03 08:43:14,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:14,660 INFO L225 Difference]: With dead ends: 79 [2018-10-03 08:43:14,660 INFO L226 Difference]: Without dead ends: 77 [2018-10-03 08:43:14,661 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:43:14,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-03 08:43:14,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-03 08:43:14,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-03 08:43:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-03 08:43:14,663 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-10-03 08:43:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:14,663 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-03 08:43:14,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:43:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-03 08:43:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-03 08:43:14,664 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:14,664 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-10-03 08:43:14,664 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:14,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:14,664 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-10-03 08:43:14,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:14,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:14,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:14,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:14,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:14,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:15,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:15,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:15,440 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:15,474 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-03 08:43:15,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:15,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:15,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:15,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:15,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-03 08:43:15,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 08:43:15,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 08:43:15,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:43:15,525 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-10-03 08:43:16,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:16,026 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-03 08:43:16,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 08:43:16,028 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-10-03 08:43:16,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:16,029 INFO L225 Difference]: With dead ends: 81 [2018-10-03 08:43:16,029 INFO L226 Difference]: Without dead ends: 79 [2018-10-03 08:43:16,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:43:16,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-03 08:43:16,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-03 08:43:16,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-03 08:43:16,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-03 08:43:16,034 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-10-03 08:43:16,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:16,034 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-03 08:43:16,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 08:43:16,034 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-03 08:43:16,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-03 08:43:16,035 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:16,035 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-10-03 08:43:16,035 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:16,035 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:16,035 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-10-03 08:43:16,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:16,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:16,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:16,036 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:16,036 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:16,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:16,687 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:16,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:16,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:16,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:16,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:16,769 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-03 08:43:16,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 08:43:16,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 08:43:16,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:43:16,771 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-10-03 08:43:16,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:16,843 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-03 08:43:16,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 08:43:16,843 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-10-03 08:43:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:16,844 INFO L225 Difference]: With dead ends: 83 [2018-10-03 08:43:16,845 INFO L226 Difference]: Without dead ends: 81 [2018-10-03 08:43:16,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:43:16,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-03 08:43:16,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-03 08:43:16,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-03 08:43:16,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-03 08:43:16,848 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-10-03 08:43:16,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:16,849 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-03 08:43:16,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 08:43:16,849 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-03 08:43:16,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-03 08:43:16,849 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:16,849 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-10-03 08:43:16,849 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:16,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:16,850 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-10-03 08:43:16,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:16,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:16,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:16,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:16,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:17,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:17,462 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 [2018-10-03 08:43:17,469 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:17,492 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:17,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:17,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:17,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:17,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:17,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-03 08:43:17,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 08:43:17,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 08:43:17,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:43:17,536 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-10-03 08:43:17,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:17,622 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-03 08:43:17,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 08:43:17,622 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-10-03 08:43:17,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:17,623 INFO L225 Difference]: With dead ends: 85 [2018-10-03 08:43:17,623 INFO L226 Difference]: Without dead ends: 83 [2018-10-03 08:43:17,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:43:17,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-03 08:43:17,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-03 08:43:17,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-03 08:43:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-03 08:43:17,628 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-10-03 08:43:17,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:17,628 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-03 08:43:17,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 08:43:17,628 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-03 08:43:17,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-03 08:43:17,629 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:17,629 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-10-03 08:43:17,629 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:17,629 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:17,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-10-03 08:43:17,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:17,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:17,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:17,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:17,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:18,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:18,515 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:18,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:18,561 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-10-03 08:43:18,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:18,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:18,602 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:18,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-03 08:43:18,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 08:43:18,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 08:43:18,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:43:18,604 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-10-03 08:43:18,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:18,711 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-03 08:43:18,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 08:43:18,711 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-10-03 08:43:18,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:18,712 INFO L225 Difference]: With dead ends: 87 [2018-10-03 08:43:18,713 INFO L226 Difference]: Without dead ends: 85 [2018-10-03 08:43:18,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:43:18,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-03 08:43:18,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-03 08:43:18,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-03 08:43:18,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-03 08:43:18,717 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-10-03 08:43:18,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:18,717 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-03 08:43:18,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 08:43:18,718 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-03 08:43:18,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-03 08:43:18,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:18,718 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-10-03 08:43:18,718 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:18,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:18,719 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-10-03 08:43:18,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:18,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:18,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:18,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:18,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:20,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:20,420 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 [2018-10-03 08:43:20,427 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:20,450 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:20,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:20,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:20,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:20,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-03 08:43:20,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 08:43:20,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 08:43:20,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:43:20,492 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-10-03 08:43:20,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:20,591 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-03 08:43:20,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 08:43:20,592 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-10-03 08:43:20,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:20,593 INFO L225 Difference]: With dead ends: 89 [2018-10-03 08:43:20,593 INFO L226 Difference]: Without dead ends: 87 [2018-10-03 08:43:20,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:43:20,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-03 08:43:20,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-03 08:43:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-03 08:43:20,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-03 08:43:20,597 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-10-03 08:43:20,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:20,597 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-03 08:43:20,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 08:43:20,598 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-03 08:43:20,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-03 08:43:20,598 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:20,598 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-10-03 08:43:20,599 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:20,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:20,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-10-03 08:43:20,599 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:20,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:20,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:20,600 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:20,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:21,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:21,486 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 [2018-10-03 08:43:21,494 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:21,529 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-10-03 08:43:21,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:21,533 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:21,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:21,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-03 08:43:21,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 08:43:21,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 08:43:21,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:43:21,583 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-10-03 08:43:21,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:21,686 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-03 08:43:21,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 08:43:21,686 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-10-03 08:43:21,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:21,687 INFO L225 Difference]: With dead ends: 91 [2018-10-03 08:43:21,688 INFO L226 Difference]: Without dead ends: 89 [2018-10-03 08:43:21,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:43:21,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-03 08:43:21,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-03 08:43:21,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-03 08:43:21,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-03 08:43:21,692 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-10-03 08:43:21,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:21,692 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-03 08:43:21,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 08:43:21,692 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-03 08:43:21,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-03 08:43:21,694 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:21,694 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-10-03 08:43:21,694 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:21,694 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:21,694 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-10-03 08:43:21,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:21,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:21,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:21,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:21,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:22,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:22,495 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 [2018-10-03 08:43:22,503 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:22,541 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-03 08:43:22,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:22,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:22,589 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:22,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-03 08:43:22,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 08:43:22,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 08:43:22,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:43:22,591 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-10-03 08:43:22,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:22,664 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-03 08:43:22,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 08:43:22,664 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-10-03 08:43:22,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:22,665 INFO L225 Difference]: With dead ends: 93 [2018-10-03 08:43:22,665 INFO L226 Difference]: Without dead ends: 91 [2018-10-03 08:43:22,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:43:22,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-03 08:43:22,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-03 08:43:22,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-03 08:43:22,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-03 08:43:22,669 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-10-03 08:43:22,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:22,670 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-03 08:43:22,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 08:43:22,670 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-03 08:43:22,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-03 08:43:22,670 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:22,670 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-10-03 08:43:22,670 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:22,671 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:22,671 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-10-03 08:43:22,671 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:22,671 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:22,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:22,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:22,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:24,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:24,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:24,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:24,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:24,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:24,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:24,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-03 08:43:24,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 08:43:24,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 08:43:24,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:43:24,641 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-10-03 08:43:24,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:24,737 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-03 08:43:24,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 08:43:24,738 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-10-03 08:43:24,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:24,739 INFO L225 Difference]: With dead ends: 95 [2018-10-03 08:43:24,739 INFO L226 Difference]: Without dead ends: 93 [2018-10-03 08:43:24,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:43:24,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-03 08:43:24,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-03 08:43:24,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-03 08:43:24,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-03 08:43:24,742 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-10-03 08:43:24,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:24,743 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-03 08:43:24,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 08:43:24,743 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-03 08:43:24,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-03 08:43:24,743 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:24,743 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-10-03 08:43:24,744 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:24,744 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:24,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-10-03 08:43:24,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:24,744 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:24,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:24,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:24,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:25,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:25,843 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:25,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:25,852 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:25,877 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:25,877 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:25,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:25,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:25,915 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:25,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-03 08:43:25,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 08:43:25,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 08:43:25,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:43:25,916 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-10-03 08:43:26,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:26,206 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-03 08:43:26,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 08:43:26,206 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-10-03 08:43:26,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:26,207 INFO L225 Difference]: With dead ends: 97 [2018-10-03 08:43:26,208 INFO L226 Difference]: Without dead ends: 95 [2018-10-03 08:43:26,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:43:26,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-03 08:43:26,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-03 08:43:26,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-03 08:43:26,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-03 08:43:26,213 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-10-03 08:43:26,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:26,213 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-03 08:43:26,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 08:43:26,213 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-03 08:43:26,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-03 08:43:26,214 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:26,214 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-10-03 08:43:26,214 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:26,214 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:26,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-10-03 08:43:26,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:26,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:26,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:26,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:26,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:26,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:27,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:27,120 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:27,129 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:27,172 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-10-03 08:43:27,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:27,175 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:27,227 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:27,227 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-03 08:43:27,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 08:43:27,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 08:43:27,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:43:27,229 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-10-03 08:43:27,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:27,316 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-03 08:43:27,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 08:43:27,317 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-10-03 08:43:27,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:27,318 INFO L225 Difference]: With dead ends: 99 [2018-10-03 08:43:27,318 INFO L226 Difference]: Without dead ends: 97 [2018-10-03 08:43:27,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:43:27,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-03 08:43:27,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-03 08:43:27,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-03 08:43:27,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-03 08:43:27,321 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-10-03 08:43:27,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:27,322 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-03 08:43:27,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 08:43:27,322 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-03 08:43:27,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-03 08:43:27,323 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:27,323 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-10-03 08:43:27,323 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:27,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:27,323 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-10-03 08:43:27,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:27,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:27,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:27,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:27,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:27,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:28,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:28,550 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 [2018-10-03 08:43:28,558 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:28,597 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:28,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:28,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:28,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:28,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-03 08:43:28,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 08:43:28,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 08:43:28,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:43:28,647 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-10-03 08:43:28,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:28,729 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-03 08:43:28,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 08:43:28,730 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-10-03 08:43:28,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:28,730 INFO L225 Difference]: With dead ends: 101 [2018-10-03 08:43:28,730 INFO L226 Difference]: Without dead ends: 99 [2018-10-03 08:43:28,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:43:28,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-03 08:43:28,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-03 08:43:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-03 08:43:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-03 08:43:28,735 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-10-03 08:43:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:28,735 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-03 08:43:28,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 08:43:28,735 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-03 08:43:28,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-03 08:43:28,736 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:28,736 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-10-03 08:43:28,736 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:28,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:28,736 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-10-03 08:43:28,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:28,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:28,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:28,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:28,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:29,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:29,731 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 [2018-10-03 08:43:29,738 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:29,783 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-10-03 08:43:29,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:29,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:29,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:29,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-03 08:43:29,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:43:29,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:43:29,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:43:29,828 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-10-03 08:43:29,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:29,916 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-03 08:43:29,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 08:43:29,916 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-10-03 08:43:29,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:29,917 INFO L225 Difference]: With dead ends: 103 [2018-10-03 08:43:29,918 INFO L226 Difference]: Without dead ends: 101 [2018-10-03 08:43:29,918 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:43:29,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-03 08:43:29,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-03 08:43:29,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-03 08:43:29,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-03 08:43:29,921 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-10-03 08:43:29,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:29,921 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-03 08:43:29,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:43:29,921 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-03 08:43:29,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-03 08:43:29,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:29,922 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-10-03 08:43:29,922 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:29,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:29,922 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-10-03 08:43:29,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:29,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:29,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:29,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:29,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:31,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:31,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:31,242 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:31,300 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-03 08:43:31,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:31,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:31,340 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:31,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-03 08:43:31,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 08:43:31,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 08:43:31,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:43:31,342 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-10-03 08:43:31,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:31,464 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-03 08:43:31,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 08:43:31,465 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-10-03 08:43:31,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:31,466 INFO L225 Difference]: With dead ends: 105 [2018-10-03 08:43:31,467 INFO L226 Difference]: Without dead ends: 103 [2018-10-03 08:43:31,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:43:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-03 08:43:31,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-03 08:43:31,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-03 08:43:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-03 08:43:31,470 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-10-03 08:43:31,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:31,471 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-03 08:43:31,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 08:43:31,471 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-03 08:43:31,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-03 08:43:31,471 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:31,471 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-10-03 08:43:31,472 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:31,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:31,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-10-03 08:43:31,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:31,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:31,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:31,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:31,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:32,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:32,494 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 [2018-10-03 08:43:32,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:32,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:32,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:32,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-03 08:43:32,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 08:43:32,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 08:43:32,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:43:32,568 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-10-03 08:43:32,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:32,660 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-03 08:43:32,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 08:43:32,660 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-10-03 08:43:32,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:32,661 INFO L225 Difference]: With dead ends: 107 [2018-10-03 08:43:32,661 INFO L226 Difference]: Without dead ends: 105 [2018-10-03 08:43:32,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:43:32,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-03 08:43:32,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-03 08:43:32,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-03 08:43:32,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-03 08:43:32,665 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-10-03 08:43:32,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:32,665 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-03 08:43:32,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 08:43:32,665 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-03 08:43:32,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-03 08:43:32,666 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:32,666 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-10-03 08:43:32,666 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:32,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:32,667 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-10-03 08:43:32,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:32,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:32,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:32,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:32,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:33,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:33,769 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 [2018-10-03 08:43:33,778 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:33,830 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:33,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:33,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:33,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:33,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-03 08:43:33,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 08:43:33,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 08:43:33,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:43:33,897 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-10-03 08:43:34,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:34,243 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-03 08:43:34,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 08:43:34,244 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-10-03 08:43:34,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:34,245 INFO L225 Difference]: With dead ends: 109 [2018-10-03 08:43:34,245 INFO L226 Difference]: Without dead ends: 107 [2018-10-03 08:43:34,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:43:34,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-03 08:43:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-03 08:43:34,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-03 08:43:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-03 08:43:34,249 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-10-03 08:43:34,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:34,249 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-03 08:43:34,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 08:43:34,249 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-03 08:43:34,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-03 08:43:34,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:34,250 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-10-03 08:43:34,250 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:34,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:34,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-10-03 08:43:34,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:34,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:34,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:34,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:34,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:35,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:35,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:35,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:35,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:35,733 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-10-03 08:43:35,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:35,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:35,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:35,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-03 08:43:35,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 08:43:35,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 08:43:35,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:43:35,791 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-10-03 08:43:35,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:35,930 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-03 08:43:35,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 08:43:35,931 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-10-03 08:43:35,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:35,932 INFO L225 Difference]: With dead ends: 111 [2018-10-03 08:43:35,932 INFO L226 Difference]: Without dead ends: 109 [2018-10-03 08:43:35,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:43:35,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-03 08:43:35,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-03 08:43:35,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-03 08:43:35,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-03 08:43:35,937 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-10-03 08:43:35,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:35,937 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-03 08:43:35,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 08:43:35,937 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-03 08:43:35,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-03 08:43:35,938 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:35,938 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-10-03 08:43:35,938 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:35,938 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:35,938 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-10-03 08:43:35,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:35,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:35,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:35,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:35,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:37,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:37,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:37,488 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 [2018-10-03 08:43:37,503 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:37,553 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:37,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:37,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:37,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:37,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-03 08:43:37,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-03 08:43:37,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-03 08:43:37,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:43:37,611 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-10-03 08:43:37,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:37,874 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-03 08:43:37,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 08:43:37,875 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-10-03 08:43:37,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:37,876 INFO L225 Difference]: With dead ends: 113 [2018-10-03 08:43:37,876 INFO L226 Difference]: Without dead ends: 111 [2018-10-03 08:43:37,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:43:37,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-03 08:43:37,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-03 08:43:37,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-03 08:43:37,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-03 08:43:37,881 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-10-03 08:43:37,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:37,881 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-03 08:43:37,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-03 08:43:37,881 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-03 08:43:37,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-03 08:43:37,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:37,882 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-10-03 08:43:37,882 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:37,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:37,882 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-10-03 08:43:37,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:37,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:37,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:37,883 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:37,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:37,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:39,184 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:39,185 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 [2018-10-03 08:43:39,192 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:39,250 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-10-03 08:43:39,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:39,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:39,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:39,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-03 08:43:39,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 08:43:39,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 08:43:39,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:43:39,309 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-10-03 08:43:39,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:39,450 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-03 08:43:39,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 08:43:39,451 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-10-03 08:43:39,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:39,452 INFO L225 Difference]: With dead ends: 115 [2018-10-03 08:43:39,452 INFO L226 Difference]: Without dead ends: 113 [2018-10-03 08:43:39,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:43:39,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-03 08:43:39,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-03 08:43:39,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-03 08:43:39,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-03 08:43:39,454 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-10-03 08:43:39,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:39,455 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-03 08:43:39,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 08:43:39,455 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-03 08:43:39,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-03 08:43:39,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:39,455 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-10-03 08:43:39,455 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:39,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:39,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-10-03 08:43:39,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:39,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:39,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:39,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:39,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:41,088 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:41,088 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 [2018-10-03 08:43:41,094 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:41,158 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-03 08:43:41,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:41,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:41,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:41,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-03 08:43:41,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-03 08:43:41,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-03 08:43:41,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:43:41,201 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-10-03 08:43:41,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:41,537 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-03 08:43:41,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 08:43:41,537 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-10-03 08:43:41,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:41,538 INFO L225 Difference]: With dead ends: 117 [2018-10-03 08:43:41,539 INFO L226 Difference]: Without dead ends: 115 [2018-10-03 08:43:41,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:43:41,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-03 08:43:41,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-03 08:43:41,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-03 08:43:41,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-03 08:43:41,542 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-10-03 08:43:41,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:41,543 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-03 08:43:41,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-03 08:43:41,543 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-03 08:43:41,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-03 08:43:41,543 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:41,544 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-10-03 08:43:41,544 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:41,544 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:41,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-10-03 08:43:41,544 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:41,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:41,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:41,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:41,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:42,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:42,799 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:42,799 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 [2018-10-03 08:43:42,806 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:42,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:42,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:42,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:42,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-03 08:43:42,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 08:43:42,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 08:43:42,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:43:42,913 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-10-03 08:43:43,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:43,556 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-10-03 08:43:43,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 08:43:43,557 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-10-03 08:43:43,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:43,558 INFO L225 Difference]: With dead ends: 119 [2018-10-03 08:43:43,558 INFO L226 Difference]: Without dead ends: 117 [2018-10-03 08:43:43,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:43:43,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-03 08:43:43,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-03 08:43:43,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-03 08:43:43,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-10-03 08:43:43,561 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-10-03 08:43:43,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:43,562 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-10-03 08:43:43,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 08:43:43,562 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-10-03 08:43:43,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-03 08:43:43,563 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:43,563 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-10-03 08:43:43,563 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:43,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:43,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-10-03 08:43:43,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:43,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:43,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:43,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:43,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:44,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:44,803 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 [2018-10-03 08:43:44,811 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:44,840 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:44,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:44,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:44,887 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:44,887 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-03 08:43:44,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 08:43:44,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 08:43:44,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:43:44,888 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-10-03 08:43:44,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:44,971 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-10-03 08:43:44,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 08:43:44,971 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-10-03 08:43:44,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:44,972 INFO L225 Difference]: With dead ends: 121 [2018-10-03 08:43:44,972 INFO L226 Difference]: Without dead ends: 119 [2018-10-03 08:43:44,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:43:44,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-03 08:43:44,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-10-03 08:43:44,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-03 08:43:44,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-10-03 08:43:44,975 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-10-03 08:43:44,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:44,976 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-10-03 08:43:44,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 08:43:44,976 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-10-03 08:43:44,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-03 08:43:44,976 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:44,976 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-10-03 08:43:44,977 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:44,977 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:44,977 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-10-03 08:43:44,977 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:44,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:44,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:44,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:44,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:46,660 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:46,660 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 [2018-10-03 08:43:46,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:43:46,723 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-10-03 08:43:46,724 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:46,726 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:46,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:46,775 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:46,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-03 08:43:46,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-03 08:43:46,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-03 08:43:46,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:43:46,776 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-10-03 08:43:46,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:46,893 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-10-03 08:43:46,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-03 08:43:46,893 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-10-03 08:43:46,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:46,894 INFO L225 Difference]: With dead ends: 123 [2018-10-03 08:43:46,894 INFO L226 Difference]: Without dead ends: 121 [2018-10-03 08:43:46,894 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:43:46,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-03 08:43:46,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-03 08:43:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-03 08:43:46,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-10-03 08:43:46,897 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-10-03 08:43:46,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:46,897 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-10-03 08:43:46,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-03 08:43:46,897 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-10-03 08:43:46,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-03 08:43:46,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:46,898 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-10-03 08:43:46,898 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:46,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:46,898 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-10-03 08:43:46,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:46,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:46,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:46,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:46,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:49,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:49,888 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:49,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:49,900 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:49,929 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:49,930 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:49,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:49,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:49,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-03 08:43:49,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-03 08:43:49,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-03 08:43:49,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:43:49,995 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-10-03 08:43:51,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:51,197 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-10-03 08:43:51,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-03 08:43:51,197 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-10-03 08:43:51,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:51,198 INFO L225 Difference]: With dead ends: 125 [2018-10-03 08:43:51,199 INFO L226 Difference]: Without dead ends: 123 [2018-10-03 08:43:51,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:43:51,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-03 08:43:51,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-10-03 08:43:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-03 08:43:51,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-10-03 08:43:51,202 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-10-03 08:43:51,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:51,202 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-10-03 08:43:51,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-03 08:43:51,203 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-10-03 08:43:51,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-03 08:43:51,203 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:51,203 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-10-03 08:43:51,204 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:51,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:51,204 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-10-03 08:43:51,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:51,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:51,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:51,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:51,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:52,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:52,624 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 [2018-10-03 08:43:52,632 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:52,686 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-10-03 08:43:52,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:52,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:52,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:52,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-03 08:43:52,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-03 08:43:52,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-03 08:43:52,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:43:52,750 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-10-03 08:43:52,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:52,999 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-10-03 08:43:52,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-03 08:43:53,000 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-10-03 08:43:53,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:53,001 INFO L225 Difference]: With dead ends: 127 [2018-10-03 08:43:53,001 INFO L226 Difference]: Without dead ends: 125 [2018-10-03 08:43:53,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:43:53,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-03 08:43:53,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-03 08:43:53,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-03 08:43:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-10-03 08:43:53,004 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-10-03 08:43:53,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:53,004 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-10-03 08:43:53,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-03 08:43:53,004 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-10-03 08:43:53,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-03 08:43:53,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:53,005 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-10-03 08:43:53,005 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:53,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:53,005 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-10-03 08:43:53,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:53,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:53,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:53,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:53,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:54,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:54,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:54,563 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 [2018-10-03 08:43:54,573 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:43:54,631 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-10-03 08:43:54,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:54,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:54,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:54,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-03 08:43:54,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-03 08:43:54,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-03 08:43:54,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:43:54,699 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-10-03 08:43:54,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:54,869 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-10-03 08:43:54,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-03 08:43:54,869 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-10-03 08:43:54,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:54,871 INFO L225 Difference]: With dead ends: 129 [2018-10-03 08:43:54,871 INFO L226 Difference]: Without dead ends: 127 [2018-10-03 08:43:54,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:43:54,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-03 08:43:54,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-10-03 08:43:54,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-03 08:43:54,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-10-03 08:43:54,876 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-10-03 08:43:54,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:54,876 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-10-03 08:43:54,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-03 08:43:54,877 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-10-03 08:43:54,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-03 08:43:54,877 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:54,878 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-10-03 08:43:54,878 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:54,878 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:54,878 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-10-03 08:43:54,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:54,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:54,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:54,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:54,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:57,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:57,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:57,137 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:57,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:57,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:57,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:57,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:57,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-03 08:43:57,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-03 08:43:57,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-03 08:43:57,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:43:57,241 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-10-03 08:43:57,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:57,383 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-10-03 08:43:57,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-03 08:43:57,383 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-10-03 08:43:57,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:57,384 INFO L225 Difference]: With dead ends: 131 [2018-10-03 08:43:57,384 INFO L226 Difference]: Without dead ends: 129 [2018-10-03 08:43:57,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:43:57,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-03 08:43:57,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-03 08:43:57,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-03 08:43:57,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-10-03 08:43:57,387 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-10-03 08:43:57,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:57,387 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-10-03 08:43:57,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-03 08:43:57,387 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-10-03 08:43:57,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-03 08:43:57,388 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:57,388 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-10-03 08:43:57,388 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:57,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:57,388 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-10-03 08:43:57,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:57,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:57,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:57,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:43:57,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:58,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:58,890 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:43:58,898 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:43:58,931 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:43:58,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:58,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:58,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:58,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-03 08:43:58,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 08:43:58,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 08:43:58,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:43:58,977 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-10-03 08:43:59,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:59,086 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-10-03 08:43:59,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 08:43:59,086 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-10-03 08:43:59,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:59,087 INFO L225 Difference]: With dead ends: 133 [2018-10-03 08:43:59,087 INFO L226 Difference]: Without dead ends: 131 [2018-10-03 08:43:59,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:43:59,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-03 08:43:59,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-03 08:43:59,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-03 08:43:59,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-10-03 08:43:59,092 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-10-03 08:43:59,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:59,093 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-10-03 08:43:59,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 08:43:59,093 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-10-03 08:43:59,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-03 08:43:59,093 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:59,094 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-10-03 08:43:59,094 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:59,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:59,094 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-10-03 08:43:59,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:59,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:59,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:59,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:59,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:00,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:00,628 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 [2018-10-03 08:44:00,638 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:44:00,733 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-10-03 08:44:00,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:00,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:00,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:00,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-03 08:44:00,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-03 08:44:00,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-03 08:44:00,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:44:00,781 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-10-03 08:44:00,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:00,959 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-10-03 08:44:00,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-03 08:44:00,959 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-10-03 08:44:00,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:00,960 INFO L225 Difference]: With dead ends: 135 [2018-10-03 08:44:00,960 INFO L226 Difference]: Without dead ends: 133 [2018-10-03 08:44:00,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:44:00,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-03 08:44:00,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-03 08:44:00,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-03 08:44:00,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-10-03 08:44:00,963 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-10-03 08:44:00,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:00,964 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-10-03 08:44:00,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-03 08:44:00,964 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-10-03 08:44:00,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-03 08:44:00,965 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:00,965 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-10-03 08:44:00,965 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:00,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:00,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-10-03 08:44:00,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:00,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:00,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:00,967 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:00,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:00,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:02,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:02,545 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 [2018-10-03 08:44:02,555 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:44:02,587 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:44:02,588 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:02,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:02,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:02,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-03 08:44:02,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-03 08:44:02,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-03 08:44:02,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:44:02,663 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-10-03 08:44:02,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:02,866 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-10-03 08:44:02,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-03 08:44:02,866 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-10-03 08:44:02,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:02,868 INFO L225 Difference]: With dead ends: 137 [2018-10-03 08:44:02,868 INFO L226 Difference]: Without dead ends: 135 [2018-10-03 08:44:02,868 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:44:02,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-03 08:44:02,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-10-03 08:44:02,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-03 08:44:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-10-03 08:44:02,871 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-10-03 08:44:02,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:02,872 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-10-03 08:44:02,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-03 08:44:02,872 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-10-03 08:44:02,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-03 08:44:02,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:02,873 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-10-03 08:44:02,873 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:02,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:02,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-10-03 08:44:02,873 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:02,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:02,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:02,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:02,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:04,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:04,645 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 [2018-10-03 08:44:04,653 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:44:04,714 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-10-03 08:44:04,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:04,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:04,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:04,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-03 08:44:04,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-03 08:44:04,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-03 08:44:04,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:44:04,785 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-10-03 08:44:05,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:05,844 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-10-03 08:44:05,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-03 08:44:05,844 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-10-03 08:44:05,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:05,845 INFO L225 Difference]: With dead ends: 139 [2018-10-03 08:44:05,845 INFO L226 Difference]: Without dead ends: 137 [2018-10-03 08:44:05,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:44:05,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-03 08:44:05,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-03 08:44:05,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-03 08:44:05,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-10-03 08:44:05,850 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-10-03 08:44:05,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:05,850 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-10-03 08:44:05,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-03 08:44:05,850 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-10-03 08:44:05,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-03 08:44:05,851 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:05,851 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-10-03 08:44:05,851 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:05,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:05,852 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-10-03 08:44:05,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:05,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:05,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:05,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:05,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:07,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:07,654 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 [2018-10-03 08:44:07,662 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:44:07,730 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-10-03 08:44:07,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:07,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:07,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:07,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-03 08:44:07,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-03 08:44:07,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-03 08:44:07,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:44:07,799 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-10-03 08:44:07,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:07,938 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-10-03 08:44:07,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-03 08:44:07,938 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-10-03 08:44:07,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:07,939 INFO L225 Difference]: With dead ends: 141 [2018-10-03 08:44:07,939 INFO L226 Difference]: Without dead ends: 139 [2018-10-03 08:44:07,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:44:07,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-03 08:44:07,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-10-03 08:44:07,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-03 08:44:07,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-10-03 08:44:07,943 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-10-03 08:44:07,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:07,943 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-10-03 08:44:07,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-03 08:44:07,943 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-10-03 08:44:07,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-03 08:44:07,943 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:07,943 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-10-03 08:44:07,944 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:07,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:07,944 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-10-03 08:44:07,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:07,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:07,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:07,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:07,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:09,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:09,674 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 [2018-10-03 08:44:09,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:09,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:09,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:09,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-03 08:44:09,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-03 08:44:09,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-03 08:44:09,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:44:09,768 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-10-03 08:44:09,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:09,888 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-10-03 08:44:09,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-03 08:44:09,888 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-10-03 08:44:09,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:09,889 INFO L225 Difference]: With dead ends: 143 [2018-10-03 08:44:09,889 INFO L226 Difference]: Without dead ends: 141 [2018-10-03 08:44:09,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:44:09,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-03 08:44:09,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-03 08:44:09,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-03 08:44:09,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-10-03 08:44:09,894 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-10-03 08:44:09,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:09,894 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-10-03 08:44:09,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-03 08:44:09,894 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-10-03 08:44:09,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-03 08:44:09,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:09,895 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-10-03 08:44:09,895 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:09,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:09,895 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-10-03 08:44:09,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:09,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:09,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:09,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:09,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:12,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:12,141 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 [2018-10-03 08:44:12,148 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:44:12,184 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:44:12,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:12,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:12,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:12,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-03 08:44:12,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-03 08:44:12,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-03 08:44:12,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:44:12,246 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-10-03 08:44:12,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:12,360 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-10-03 08:44:12,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-03 08:44:12,360 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-10-03 08:44:12,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:12,361 INFO L225 Difference]: With dead ends: 145 [2018-10-03 08:44:12,362 INFO L226 Difference]: Without dead ends: 143 [2018-10-03 08:44:12,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:44:12,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-03 08:44:12,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-10-03 08:44:12,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-03 08:44:12,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-10-03 08:44:12,364 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-10-03 08:44:12,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:12,365 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-10-03 08:44:12,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-03 08:44:12,365 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-10-03 08:44:12,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-03 08:44:12,365 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:12,366 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-10-03 08:44:12,366 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:12,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:12,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-10-03 08:44:12,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:12,366 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:12,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:12,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:12,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:14,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:14,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:14,259 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 [2018-10-03 08:44:14,281 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:44:14,383 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-10-03 08:44:14,383 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:14,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:14,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:14,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-03 08:44:14,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-03 08:44:14,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-03 08:44:14,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:44:14,451 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-10-03 08:44:14,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:14,754 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-10-03 08:44:14,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-03 08:44:14,754 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-10-03 08:44:14,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:14,755 INFO L225 Difference]: With dead ends: 147 [2018-10-03 08:44:14,755 INFO L226 Difference]: Without dead ends: 145 [2018-10-03 08:44:14,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:44:14,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-03 08:44:14,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-03 08:44:14,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-03 08:44:14,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-10-03 08:44:14,758 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-10-03 08:44:14,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:14,759 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-10-03 08:44:14,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-03 08:44:14,759 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-10-03 08:44:14,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-03 08:44:14,759 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:14,760 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-10-03 08:44:14,760 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:14,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:14,760 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-10-03 08:44:14,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:14,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:14,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:14,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:14,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:16,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:16,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:16,850 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 [2018-10-03 08:44:16,857 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:44:16,893 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:44:16,893 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:16,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:16,963 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:16,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-03 08:44:16,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-03 08:44:16,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-03 08:44:16,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:44:16,965 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-10-03 08:44:17,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:17,247 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-10-03 08:44:17,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-03 08:44:17,247 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-10-03 08:44:17,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:17,248 INFO L225 Difference]: With dead ends: 149 [2018-10-03 08:44:17,248 INFO L226 Difference]: Without dead ends: 147 [2018-10-03 08:44:17,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:44:17,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-03 08:44:17,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-10-03 08:44:17,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-03 08:44:17,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-10-03 08:44:17,253 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-10-03 08:44:17,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:17,253 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-10-03 08:44:17,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-03 08:44:17,253 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-10-03 08:44:17,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-03 08:44:17,254 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:17,254 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-10-03 08:44:17,254 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:17,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:17,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-10-03 08:44:17,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:17,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:17,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:17,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:17,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:19,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:19,280 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 [2018-10-03 08:44:19,287 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:44:19,736 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-10-03 08:44:19,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:19,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:19,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:19,807 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-03 08:44:19,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 08:44:19,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 08:44:19,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:44:19,808 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-10-03 08:44:19,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:19,996 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-10-03 08:44:19,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-03 08:44:19,996 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-10-03 08:44:19,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:19,997 INFO L225 Difference]: With dead ends: 151 [2018-10-03 08:44:19,998 INFO L226 Difference]: Without dead ends: 149 [2018-10-03 08:44:19,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:44:19,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-03 08:44:20,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-03 08:44:20,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-03 08:44:20,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-10-03 08:44:20,001 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-10-03 08:44:20,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:20,001 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-10-03 08:44:20,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 08:44:20,002 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-10-03 08:44:20,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-03 08:44:20,003 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:20,003 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-10-03 08:44:20,003 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:20,003 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:20,003 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-10-03 08:44:20,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:20,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:20,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:20,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:20,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:22,305 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:22,305 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 [2018-10-03 08:44:22,313 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:44:22,386 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-10-03 08:44:22,386 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:22,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:22,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:22,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-03 08:44:22,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-03 08:44:22,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-03 08:44:22,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:44:22,438 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-10-03 08:44:22,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:22,575 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-10-03 08:44:22,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-03 08:44:22,576 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-10-03 08:44:22,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:22,577 INFO L225 Difference]: With dead ends: 153 [2018-10-03 08:44:22,577 INFO L226 Difference]: Without dead ends: 151 [2018-10-03 08:44:22,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:44:22,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-03 08:44:22,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-03 08:44:22,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-03 08:44:22,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-10-03 08:44:22,583 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-10-03 08:44:22,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:22,583 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-10-03 08:44:22,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-03 08:44:22,583 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-10-03 08:44:22,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-03 08:44:22,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:22,584 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-10-03 08:44:22,584 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:22,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:22,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-10-03 08:44:22,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:22,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:22,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:22,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:22,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:24,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:24,683 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 [2018-10-03 08:44:24,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:24,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:24,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:24,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-03 08:44:24,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-03 08:44:24,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-03 08:44:24,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:44:24,795 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-10-03 08:44:24,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:24,980 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-10-03 08:44:24,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-03 08:44:24,981 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-10-03 08:44:24,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:24,982 INFO L225 Difference]: With dead ends: 155 [2018-10-03 08:44:24,982 INFO L226 Difference]: Without dead ends: 153 [2018-10-03 08:44:24,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:44:24,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-03 08:44:24,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-03 08:44:24,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-03 08:44:24,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-10-03 08:44:24,985 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-10-03 08:44:24,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:24,985 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-10-03 08:44:24,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-03 08:44:24,985 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-10-03 08:44:24,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-03 08:44:24,986 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:24,986 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-10-03 08:44:24,986 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:24,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:24,986 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-10-03 08:44:24,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:24,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:24,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:24,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:24,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:27,425 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:27,425 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:44:27,432 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:44:27,471 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:44:27,471 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:27,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:27,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:27,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-03 08:44:27,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-03 08:44:27,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-03 08:44:27,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:44:27,540 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-10-03 08:44:27,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:27,772 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-10-03 08:44:27,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-03 08:44:27,772 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-10-03 08:44:27,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:27,773 INFO L225 Difference]: With dead ends: 157 [2018-10-03 08:44:27,773 INFO L226 Difference]: Without dead ends: 155 [2018-10-03 08:44:27,773 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:44:27,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-03 08:44:27,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-10-03 08:44:27,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-03 08:44:27,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-10-03 08:44:27,776 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-10-03 08:44:27,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:27,776 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-10-03 08:44:27,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-03 08:44:27,776 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-10-03 08:44:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-03 08:44:27,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:27,777 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-10-03 08:44:27,777 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:27,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:27,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-10-03 08:44:27,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:27,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:27,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:27,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:27,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:27,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:29,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:29,876 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 [2018-10-03 08:44:29,886 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:44:29,965 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-10-03 08:44:29,965 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:29,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:30,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:30,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:30,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-03 08:44:30,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-03 08:44:30,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-03 08:44:30,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:44:30,025 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-10-03 08:44:30,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:30,229 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-10-03 08:44:30,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-03 08:44:30,229 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-10-03 08:44:30,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:30,230 INFO L225 Difference]: With dead ends: 159 [2018-10-03 08:44:30,230 INFO L226 Difference]: Without dead ends: 157 [2018-10-03 08:44:30,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:44:30,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-03 08:44:30,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-03 08:44:30,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-03 08:44:30,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-10-03 08:44:30,234 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-10-03 08:44:30,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:30,235 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-10-03 08:44:30,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-03 08:44:30,235 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-10-03 08:44:30,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-03 08:44:30,235 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:30,235 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-10-03 08:44:30,236 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:30,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:30,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-10-03 08:44:30,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:30,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:30,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:30,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:30,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:30,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:32,729 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:32,730 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 [2018-10-03 08:44:32,745 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:44:32,782 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:44:32,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:32,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:32,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:32,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:32,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-03 08:44:32,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-03 08:44:32,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-03 08:44:32,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:44:32,835 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-10-03 08:44:33,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:33,052 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-10-03 08:44:33,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-03 08:44:33,052 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-10-03 08:44:33,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:33,053 INFO L225 Difference]: With dead ends: 161 [2018-10-03 08:44:33,053 INFO L226 Difference]: Without dead ends: 159 [2018-10-03 08:44:33,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:44:33,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-03 08:44:33,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-10-03 08:44:33,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-03 08:44:33,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-10-03 08:44:33,056 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-10-03 08:44:33,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:33,056 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-10-03 08:44:33,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-03 08:44:33,056 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-10-03 08:44:33,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-03 08:44:33,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:33,057 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-10-03 08:44:33,057 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:33,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:33,058 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-10-03 08:44:33,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:33,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:33,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:33,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:33,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:35,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:35,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:35,232 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 [2018-10-03 08:44:35,240 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:44:35,317 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-10-03 08:44:35,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:35,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:35,375 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:35,376 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-03 08:44:35,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-03 08:44:35,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-03 08:44:35,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:44:35,377 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-10-03 08:44:35,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:35,889 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-10-03 08:44:35,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-03 08:44:35,890 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-10-03 08:44:35,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:35,891 INFO L225 Difference]: With dead ends: 163 [2018-10-03 08:44:35,891 INFO L226 Difference]: Without dead ends: 161 [2018-10-03 08:44:35,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:44:35,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-03 08:44:35,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-03 08:44:35,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-03 08:44:35,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-10-03 08:44:35,895 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-10-03 08:44:35,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:35,896 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-10-03 08:44:35,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-03 08:44:35,896 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-10-03 08:44:35,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-03 08:44:35,897 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:35,897 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-10-03 08:44:35,897 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:35,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:35,898 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-10-03 08:44:35,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:35,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:35,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:35,899 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:35,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:39,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:39,214 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 [2018-10-03 08:44:39,221 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:44:39,343 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-10-03 08:44:39,343 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:39,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:39,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:39,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-03 08:44:39,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-03 08:44:39,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-03 08:44:39,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:44:39,407 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-10-03 08:44:39,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:39,552 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-10-03 08:44:39,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-03 08:44:39,553 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-10-03 08:44:39,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:39,554 INFO L225 Difference]: With dead ends: 165 [2018-10-03 08:44:39,554 INFO L226 Difference]: Without dead ends: 163 [2018-10-03 08:44:39,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:44:39,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-03 08:44:39,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-10-03 08:44:39,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-03 08:44:39,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-10-03 08:44:39,559 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-10-03 08:44:39,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:39,559 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-10-03 08:44:39,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-03 08:44:39,560 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-10-03 08:44:39,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-03 08:44:39,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:39,561 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-10-03 08:44:39,561 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:39,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:39,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-10-03 08:44:39,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:39,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:39,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:39,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:39,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:42,218 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:42,218 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 [2018-10-03 08:44:42,226 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:42,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:42,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:42,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-03 08:44:42,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-03 08:44:42,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-03 08:44:42,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:44:42,327 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-10-03 08:44:42,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:42,550 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-10-03 08:44:42,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-03 08:44:42,550 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-10-03 08:44:42,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:42,551 INFO L225 Difference]: With dead ends: 167 [2018-10-03 08:44:42,551 INFO L226 Difference]: Without dead ends: 165 [2018-10-03 08:44:42,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:44:42,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-03 08:44:42,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-03 08:44:42,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-03 08:44:42,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-10-03 08:44:42,554 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-10-03 08:44:42,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:42,554 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-10-03 08:44:42,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-03 08:44:42,554 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-10-03 08:44:42,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-03 08:44:42,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:42,555 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-10-03 08:44:42,555 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:42,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:42,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-10-03 08:44:42,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:42,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:42,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:42,557 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:44:42,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:44,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:44,941 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 [2018-10-03 08:44:44,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:44:44,990 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:44:44,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:44,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:45,048 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:45,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-03 08:44:45,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-03 08:44:45,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-03 08:44:45,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:44:45,049 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-10-03 08:44:45,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:45,211 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-10-03 08:44:45,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-03 08:44:45,211 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-10-03 08:44:45,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:45,212 INFO L225 Difference]: With dead ends: 169 [2018-10-03 08:44:45,212 INFO L226 Difference]: Without dead ends: 167 [2018-10-03 08:44:45,213 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:44:45,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-03 08:44:45,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-10-03 08:44:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-03 08:44:45,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-10-03 08:44:45,215 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-10-03 08:44:45,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:45,215 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-10-03 08:44:45,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-03 08:44:45,216 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-10-03 08:44:45,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-03 08:44:45,216 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:45,216 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-10-03 08:44:45,216 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:45,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:45,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-10-03 08:44:45,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:45,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:45,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:45,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:45,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:47,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:47,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:47,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:44:47,954 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:44:48,042 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-10-03 08:44:48,043 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:48,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:48,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:48,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-03 08:44:48,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-03 08:44:48,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-03 08:44:48,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:44:48,100 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-10-03 08:44:48,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:48,276 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-10-03 08:44:48,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-03 08:44:48,276 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-10-03 08:44:48,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:48,277 INFO L225 Difference]: With dead ends: 171 [2018-10-03 08:44:48,278 INFO L226 Difference]: Without dead ends: 169 [2018-10-03 08:44:48,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:44:48,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-03 08:44:48,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-03 08:44:48,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-03 08:44:48,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-10-03 08:44:48,282 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-10-03 08:44:48,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:48,282 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-10-03 08:44:48,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-03 08:44:48,282 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-10-03 08:44:48,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-03 08:44:48,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:48,283 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-10-03 08:44:48,283 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:48,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:48,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-10-03 08:44:48,283 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:48,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:48,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:48,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:48,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:50,857 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:50,857 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:44:50,866 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:44:50,906 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:44:50,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:50,910 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:50,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:50,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-03 08:44:50,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-03 08:44:50,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-03 08:44:50,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 08:44:50,983 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-10-03 08:44:51,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:51,267 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-10-03 08:44:51,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-03 08:44:51,268 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-10-03 08:44:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:51,268 INFO L225 Difference]: With dead ends: 173 [2018-10-03 08:44:51,268 INFO L226 Difference]: Without dead ends: 171 [2018-10-03 08:44:51,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 08:44:51,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-03 08:44:51,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-03 08:44:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-03 08:44:51,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-10-03 08:44:51,272 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-10-03 08:44:51,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:51,273 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-10-03 08:44:51,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-03 08:44:51,273 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-10-03 08:44:51,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-03 08:44:51,273 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:51,273 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-10-03 08:44:51,274 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:51,274 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:51,274 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-10-03 08:44:51,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:51,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:51,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:51,275 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:51,275 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:54,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:54,049 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 [2018-10-03 08:44:54,057 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:44:54,142 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-10-03 08:44:54,142 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:54,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:54,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:54,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:54,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-03 08:44:54,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-03 08:44:54,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-03 08:44:54,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:44:54,200 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-10-03 08:44:54,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:54,463 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-10-03 08:44:54,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-03 08:44:54,463 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-10-03 08:44:54,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:54,464 INFO L225 Difference]: With dead ends: 175 [2018-10-03 08:44:54,464 INFO L226 Difference]: Without dead ends: 173 [2018-10-03 08:44:54,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:44:54,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-03 08:44:54,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-03 08:44:54,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-03 08:44:54,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-10-03 08:44:54,469 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-10-03 08:44:54,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:54,469 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-10-03 08:44:54,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-03 08:44:54,470 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-10-03 08:44:54,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-03 08:44:54,470 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:54,471 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-10-03 08:44:54,471 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:54,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:54,471 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-10-03 08:44:54,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:54,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:54,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:54,472 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:54,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:44:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:57,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:44:57,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:44:57,270 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:44:57,355 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-10-03 08:44:57,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:44:57,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:44:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:44:57,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:44:57,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-03 08:44:57,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-03 08:44:57,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-03 08:44:57,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 08:44:57,414 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-10-03 08:44:57,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:44:57,851 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-10-03 08:44:57,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-03 08:44:57,851 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-10-03 08:44:57,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:44:57,852 INFO L225 Difference]: With dead ends: 177 [2018-10-03 08:44:57,852 INFO L226 Difference]: Without dead ends: 175 [2018-10-03 08:44:57,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 08:44:57,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-03 08:44:57,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-10-03 08:44:57,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-03 08:44:57,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-10-03 08:44:57,856 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-10-03 08:44:57,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:44:57,856 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-10-03 08:44:57,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-03 08:44:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-10-03 08:44:57,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-03 08:44:57,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:44:57,857 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-10-03 08:44:57,858 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:44:57,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:44:57,858 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-10-03 08:44:57,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:44:57,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:44:57,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:57,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:44:57,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:44:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:00,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:00,533 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 [2018-10-03 08:45:00,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:45:00,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:00,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:00,658 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:00,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-03 08:45:00,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-03 08:45:00,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-03 08:45:00,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:45:00,659 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-10-03 08:45:00,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:00,948 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-10-03 08:45:00,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-03 08:45:00,949 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-10-03 08:45:00,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:00,950 INFO L225 Difference]: With dead ends: 179 [2018-10-03 08:45:00,950 INFO L226 Difference]: Without dead ends: 177 [2018-10-03 08:45:00,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:45:00,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-03 08:45:00,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-10-03 08:45:00,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-03 08:45:00,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-10-03 08:45:00,954 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-10-03 08:45:00,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:00,955 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-10-03 08:45:00,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-03 08:45:00,955 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-10-03 08:45:00,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-03 08:45:00,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:00,956 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-10-03 08:45:00,956 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:00,956 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:00,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-10-03 08:45:00,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:00,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:00,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:00,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:45:00,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:03,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:03,958 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 [2018-10-03 08:45:03,966 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:45:04,009 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:45:04,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:04,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:04,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:04,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:04,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-03 08:45:04,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-03 08:45:04,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-03 08:45:04,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:45:04,068 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-10-03 08:45:04,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:04,229 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-10-03 08:45:04,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-03 08:45:04,229 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-10-03 08:45:04,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:04,230 INFO L225 Difference]: With dead ends: 181 [2018-10-03 08:45:04,231 INFO L226 Difference]: Without dead ends: 179 [2018-10-03 08:45:04,231 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:45:04,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-03 08:45:04,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-10-03 08:45:04,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-03 08:45:04,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-10-03 08:45:04,235 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-10-03 08:45:04,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:04,235 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-10-03 08:45:04,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-03 08:45:04,235 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-10-03 08:45:04,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-03 08:45:04,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:04,236 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-10-03 08:45:04,236 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:04,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:04,236 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-10-03 08:45:04,236 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:04,236 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:04,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:04,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:04,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:07,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:07,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:45:07,245 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:45:07,399 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-10-03 08:45:07,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:07,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:07,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:07,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-03 08:45:07,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-03 08:45:07,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-03 08:45:07,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:45:07,458 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-10-03 08:45:07,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:07,711 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-10-03 08:45:07,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-03 08:45:07,712 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-10-03 08:45:07,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:07,712 INFO L225 Difference]: With dead ends: 183 [2018-10-03 08:45:07,712 INFO L226 Difference]: Without dead ends: 181 [2018-10-03 08:45:07,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:45:07,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-03 08:45:07,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-03 08:45:07,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-03 08:45:07,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-10-03 08:45:07,717 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-10-03 08:45:07,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:07,717 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-10-03 08:45:07,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-03 08:45:07,717 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-10-03 08:45:07,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-03 08:45:07,718 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:07,718 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-10-03 08:45:07,718 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:07,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:07,719 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-10-03 08:45:07,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:07,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:07,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:07,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:07,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:10,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:10,553 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 [2018-10-03 08:45:10,560 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:45:10,603 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:45:10,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:10,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:10,662 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:10,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-03 08:45:10,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-03 08:45:10,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-03 08:45:10,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-03 08:45:10,664 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-10-03 08:45:10,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:10,855 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-10-03 08:45:10,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-03 08:45:10,856 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-10-03 08:45:10,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:10,857 INFO L225 Difference]: With dead ends: 185 [2018-10-03 08:45:10,857 INFO L226 Difference]: Without dead ends: 183 [2018-10-03 08:45:10,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-03 08:45:10,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-03 08:45:10,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-10-03 08:45:10,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-03 08:45:10,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-10-03 08:45:10,862 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-10-03 08:45:10,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:10,862 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-10-03 08:45:10,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-03 08:45:10,862 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-10-03 08:45:10,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-03 08:45:10,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:10,863 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-10-03 08:45:10,863 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:10,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:10,864 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-10-03 08:45:10,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:10,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:10,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:10,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:10,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:14,034 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:14,034 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 [2018-10-03 08:45:14,041 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:45:14,134 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-10-03 08:45:14,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:14,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:14,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:14,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-03 08:45:14,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-03 08:45:14,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-03 08:45:14,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:45:14,197 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-10-03 08:45:14,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:14,497 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-10-03 08:45:14,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-03 08:45:14,497 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-10-03 08:45:14,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:14,498 INFO L225 Difference]: With dead ends: 187 [2018-10-03 08:45:14,498 INFO L226 Difference]: Without dead ends: 185 [2018-10-03 08:45:14,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:45:14,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-03 08:45:14,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-03 08:45:14,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-03 08:45:14,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-10-03 08:45:14,502 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-10-03 08:45:14,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:14,502 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-10-03 08:45:14,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-03 08:45:14,502 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-10-03 08:45:14,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-03 08:45:14,503 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:14,503 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-10-03 08:45:14,503 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:14,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:14,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-10-03 08:45:14,504 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:14,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:14,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:14,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:14,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:17,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:17,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:17,879 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 [2018-10-03 08:45:17,887 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:45:17,983 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-10-03 08:45:17,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:17,986 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:18,043 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:18,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-03 08:45:18,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-03 08:45:18,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-03 08:45:18,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-03 08:45:18,044 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-10-03 08:45:18,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:18,268 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-10-03 08:45:18,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-03 08:45:18,268 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-10-03 08:45:18,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:18,269 INFO L225 Difference]: With dead ends: 189 [2018-10-03 08:45:18,269 INFO L226 Difference]: Without dead ends: 187 [2018-10-03 08:45:18,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-03 08:45:18,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-03 08:45:18,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-10-03 08:45:18,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-03 08:45:18,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-10-03 08:45:18,274 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-10-03 08:45:18,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:18,274 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-10-03 08:45:18,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-03 08:45:18,274 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-10-03 08:45:18,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-03 08:45:18,275 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:18,275 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-10-03 08:45:18,276 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:18,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:18,276 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-10-03 08:45:18,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:18,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:18,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:18,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:18,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:21,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:21,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:21,397 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 [2018-10-03 08:45:21,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:45:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:21,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:21,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:21,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-03 08:45:21,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-03 08:45:21,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-03 08:45:21,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:45:21,511 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-10-03 08:45:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:21,700 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-10-03 08:45:21,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-03 08:45:21,700 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-10-03 08:45:21,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:21,701 INFO L225 Difference]: With dead ends: 191 [2018-10-03 08:45:21,701 INFO L226 Difference]: Without dead ends: 189 [2018-10-03 08:45:21,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:45:21,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-03 08:45:21,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-03 08:45:21,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-03 08:45:21,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-10-03 08:45:21,706 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-10-03 08:45:21,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:21,706 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-10-03 08:45:21,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-03 08:45:21,706 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-10-03 08:45:21,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-03 08:45:21,707 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:21,707 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-10-03 08:45:21,707 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:21,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:21,708 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-10-03 08:45:21,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:21,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:21,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:21,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:45:21,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:25,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:25,153 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 [2018-10-03 08:45:25,162 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:45:25,209 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:45:25,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:25,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:25,279 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:25,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-03 08:45:25,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-03 08:45:25,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-03 08:45:25,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-03 08:45:25,281 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-10-03 08:45:25,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:25,450 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-10-03 08:45:25,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-03 08:45:25,450 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-10-03 08:45:25,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:25,451 INFO L225 Difference]: With dead ends: 193 [2018-10-03 08:45:25,451 INFO L226 Difference]: Without dead ends: 191 [2018-10-03 08:45:25,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-03 08:45:25,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-03 08:45:25,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-03 08:45:25,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-03 08:45:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-10-03 08:45:25,455 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-10-03 08:45:25,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:25,456 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-10-03 08:45:25,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-03 08:45:25,456 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-10-03 08:45:25,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-03 08:45:25,457 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:25,457 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-10-03 08:45:25,457 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:25,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:25,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-10-03 08:45:25,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:25,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:25,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:25,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:25,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:29,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:29,545 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 [2018-10-03 08:45:29,554 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:45:29,667 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-10-03 08:45:29,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:29,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:29,730 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:29,730 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-03 08:45:29,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-03 08:45:29,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-03 08:45:29,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-03 08:45:29,732 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-10-03 08:45:29,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:29,927 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-10-03 08:45:29,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-03 08:45:29,927 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-10-03 08:45:29,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:29,928 INFO L225 Difference]: With dead ends: 195 [2018-10-03 08:45:29,929 INFO L226 Difference]: Without dead ends: 193 [2018-10-03 08:45:29,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-03 08:45:29,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-03 08:45:29,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-03 08:45:29,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-03 08:45:29,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-10-03 08:45:29,932 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-10-03 08:45:29,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:29,932 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-10-03 08:45:29,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-03 08:45:29,933 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-10-03 08:45:29,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-03 08:45:29,933 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:29,933 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-10-03 08:45:29,933 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:29,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:29,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-10-03 08:45:29,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:29,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:29,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:29,934 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:29,934 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:33,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:33,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-10-03 08:45:33,333 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:45:33,381 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:45:33,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:33,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:33,462 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:33,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-03 08:45:33,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-03 08:45:33,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-03 08:45:33,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-03 08:45:33,464 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-10-03 08:45:33,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:33,754 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-10-03 08:45:33,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-03 08:45:33,754 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-10-03 08:45:33,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:33,755 INFO L225 Difference]: With dead ends: 197 [2018-10-03 08:45:33,755 INFO L226 Difference]: Without dead ends: 195 [2018-10-03 08:45:33,756 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-03 08:45:33,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-03 08:45:33,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-10-03 08:45:33,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-03 08:45:33,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-10-03 08:45:33,758 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-10-03 08:45:33,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:33,759 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-10-03 08:45:33,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-03 08:45:33,759 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-10-03 08:45:33,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-03 08:45:33,759 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:33,760 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-10-03 08:45:33,760 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:33,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:33,760 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-10-03 08:45:33,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:33,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:33,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:33,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:33,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:37,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:37,108 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 [2018-10-03 08:45:37,118 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:45:37,218 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-10-03 08:45:37,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:37,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:37,283 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:37,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-03 08:45:37,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-03 08:45:37,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-03 08:45:37,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:45:37,285 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-10-03 08:45:37,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:37,590 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-10-03 08:45:37,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-03 08:45:37,590 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-10-03 08:45:37,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:37,591 INFO L225 Difference]: With dead ends: 199 [2018-10-03 08:45:37,591 INFO L226 Difference]: Without dead ends: 197 [2018-10-03 08:45:37,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:45:37,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-03 08:45:37,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-10-03 08:45:37,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-03 08:45:37,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-10-03 08:45:37,596 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-10-03 08:45:37,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:37,596 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-10-03 08:45:37,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-03 08:45:37,596 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-10-03 08:45:37,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-03 08:45:37,597 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:37,597 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-10-03 08:45:37,597 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:37,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:37,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-10-03 08:45:37,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:37,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:37,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:37,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:37,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:41,314 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:41,315 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 [2018-10-03 08:45:41,322 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:45:41,429 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-10-03 08:45:41,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:41,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:41,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:41,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:41,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-03 08:45:41,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-03 08:45:41,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-03 08:45:41,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-03 08:45:41,497 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-10-03 08:45:41,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:41,679 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-10-03 08:45:41,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-03 08:45:41,680 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-10-03 08:45:41,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:41,681 INFO L225 Difference]: With dead ends: 201 [2018-10-03 08:45:41,681 INFO L226 Difference]: Without dead ends: 199 [2018-10-03 08:45:41,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-03 08:45:41,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-03 08:45:41,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-10-03 08:45:41,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-03 08:45:41,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-10-03 08:45:41,684 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-10-03 08:45:41,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:41,684 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-10-03 08:45:41,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-03 08:45:41,684 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-10-03 08:45:41,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-03 08:45:41,685 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:41,685 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-10-03 08:45:41,685 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:41,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:41,686 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-10-03 08:45:41,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:41,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:41,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:41,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:41,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:45,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:45,490 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 [2018-10-03 08:45:45,496 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:45:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:45,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:45,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:45,611 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:45,611 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-03 08:45:45,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-03 08:45:45,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-03 08:45:45,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-03 08:45:45,613 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2018-10-03 08:45:45,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:45,922 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-10-03 08:45:45,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-03 08:45:45,922 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-10-03 08:45:45,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:45,923 INFO L225 Difference]: With dead ends: 203 [2018-10-03 08:45:45,923 INFO L226 Difference]: Without dead ends: 201 [2018-10-03 08:45:45,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-03 08:45:45,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-03 08:45:45,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-10-03 08:45:45,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-03 08:45:45,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-10-03 08:45:45,926 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2018-10-03 08:45:45,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:45,927 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-10-03 08:45:45,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-03 08:45:45,927 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-10-03 08:45:45,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-03 08:45:45,927 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:45,928 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1] [2018-10-03 08:45:45,928 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:45,928 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:45,928 INFO L82 PathProgramCache]: Analyzing trace with hash 925303419, now seen corresponding path program 98 times [2018-10-03 08:45:45,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:45,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:45,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:45,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:45:45,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:49,782 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:49,782 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 [2018-10-03 08:45:49,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:45:49,840 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:45:49,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:49,844 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:49,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:49,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-03 08:45:49,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-03 08:45:49,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-03 08:45:49,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-03 08:45:49,909 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 101 states. [2018-10-03 08:45:50,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:50,251 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-10-03 08:45:50,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-03 08:45:50,251 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2018-10-03 08:45:50,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:50,252 INFO L225 Difference]: With dead ends: 205 [2018-10-03 08:45:50,252 INFO L226 Difference]: Without dead ends: 203 [2018-10-03 08:45:50,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-03 08:45:50,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-03 08:45:50,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-10-03 08:45:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-03 08:45:50,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-10-03 08:45:50,256 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2018-10-03 08:45:50,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:50,256 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-10-03 08:45:50,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-03 08:45:50,256 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-10-03 08:45:50,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-03 08:45:50,257 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:50,257 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1] [2018-10-03 08:45:50,257 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:50,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:50,257 INFO L82 PathProgramCache]: Analyzing trace with hash 158407477, now seen corresponding path program 99 times [2018-10-03 08:45:50,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:50,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:50,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:50,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:50,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:54,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:54,067 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:54,067 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:45:54,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:45:54,195 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-10-03 08:45:54,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:54,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:54,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:54,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-03 08:45:54,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-03 08:45:54,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-03 08:45:54,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:45:54,265 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 102 states. [2018-10-03 08:45:54,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:54,514 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-10-03 08:45:54,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-03 08:45:54,515 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-10-03 08:45:54,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:54,516 INFO L225 Difference]: With dead ends: 207 [2018-10-03 08:45:54,516 INFO L226 Difference]: Without dead ends: 205 [2018-10-03 08:45:54,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:45:54,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-10-03 08:45:54,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-10-03 08:45:54,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-03 08:45:54,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-10-03 08:45:54,520 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2018-10-03 08:45:54,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:54,521 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-10-03 08:45:54,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-03 08:45:54,521 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-10-03 08:45:54,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-03 08:45:54,521 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:54,522 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1] [2018-10-03 08:45:54,522 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:54,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:54,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1905782127, now seen corresponding path program 100 times [2018-10-03 08:45:54,522 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:54,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:54,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:54,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:54,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:45:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:58,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:45:58,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:45:58,155 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:45:58,206 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:45:58,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:45:58,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:45:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:45:58,277 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:45:58,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-03 08:45:58,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-03 08:45:58,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-03 08:45:58,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-03 08:45:58,279 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 103 states. [2018-10-03 08:45:58,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:45:58,533 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-10-03 08:45:58,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-03 08:45:58,534 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 204 [2018-10-03 08:45:58,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:45:58,535 INFO L225 Difference]: With dead ends: 209 [2018-10-03 08:45:58,535 INFO L226 Difference]: Without dead ends: 207 [2018-10-03 08:45:58,535 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-03 08:45:58,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-03 08:45:58,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-10-03 08:45:58,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-10-03 08:45:58,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-10-03 08:45:58,539 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2018-10-03 08:45:58,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:45:58,539 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-10-03 08:45:58,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-03 08:45:58,540 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-10-03 08:45:58,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-03 08:45:58,541 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:45:58,541 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1] [2018-10-03 08:45:58,541 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:45:58,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:45:58,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1800608041, now seen corresponding path program 101 times [2018-10-03 08:45:58,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:45:58,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:45:58,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:58,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:45:58,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:45:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:02,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:02,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:46:02,411 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:46:02,662 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-10-03 08:46:02,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:02,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:02,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:02,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-03 08:46:02,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-03 08:46:02,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-03 08:46:02,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-03 08:46:02,737 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 104 states. [2018-10-03 08:46:02,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:02,976 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-10-03 08:46:02,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-03 08:46:02,976 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2018-10-03 08:46:02,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:02,977 INFO L225 Difference]: With dead ends: 211 [2018-10-03 08:46:02,977 INFO L226 Difference]: Without dead ends: 209 [2018-10-03 08:46:02,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-03 08:46:02,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-03 08:46:02,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-10-03 08:46:02,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-03 08:46:02,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-10-03 08:46:02,981 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2018-10-03 08:46:02,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:02,981 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-10-03 08:46:02,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-03 08:46:02,981 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-10-03 08:46:02,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-03 08:46:02,982 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:02,982 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1] [2018-10-03 08:46:02,982 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:02,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:02,982 INFO L82 PathProgramCache]: Analyzing trace with hash -487440797, now seen corresponding path program 102 times [2018-10-03 08:46:02,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:02,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:02,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:02,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:02,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:06,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:06,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:46:06,993 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:46:07,109 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-10-03 08:46:07,110 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:07,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:07,179 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:07,180 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-03 08:46:07,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-03 08:46:07,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-03 08:46:07,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-03 08:46:07,181 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 105 states. [2018-10-03 08:46:07,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:07,478 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-10-03 08:46:07,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-03 08:46:07,479 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 208 [2018-10-03 08:46:07,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:07,479 INFO L225 Difference]: With dead ends: 213 [2018-10-03 08:46:07,479 INFO L226 Difference]: Without dead ends: 211 [2018-10-03 08:46:07,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-03 08:46:07,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-03 08:46:07,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-10-03 08:46:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-03 08:46:07,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-10-03 08:46:07,484 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2018-10-03 08:46:07,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:07,485 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-10-03 08:46:07,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-03 08:46:07,485 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-10-03 08:46:07,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-10-03 08:46:07,486 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:07,486 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1] [2018-10-03 08:46:07,486 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:07,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:07,487 INFO L82 PathProgramCache]: Analyzing trace with hash -279118563, now seen corresponding path program 103 times [2018-10-03 08:46:07,487 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:07,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:07,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:07,488 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:07,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:11,616 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:11,616 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:46:11,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:46:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:11,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:11,746 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:11,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-03 08:46:11,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-03 08:46:11,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-03 08:46:11,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-03 08:46:11,748 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 106 states. [2018-10-03 08:46:12,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:12,125 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-10-03 08:46:12,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-03 08:46:12,125 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 210 [2018-10-03 08:46:12,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:12,126 INFO L225 Difference]: With dead ends: 215 [2018-10-03 08:46:12,126 INFO L226 Difference]: Without dead ends: 213 [2018-10-03 08:46:12,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-03 08:46:12,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-10-03 08:46:12,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-10-03 08:46:12,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-10-03 08:46:12,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-10-03 08:46:12,130 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2018-10-03 08:46:12,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:12,130 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-10-03 08:46:12,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-03 08:46:12,131 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-10-03 08:46:12,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-03 08:46:12,132 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:12,132 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1] [2018-10-03 08:46:12,132 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:12,132 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:12,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1944914601, now seen corresponding path program 104 times [2018-10-03 08:46:12,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:12,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:12,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:12,133 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:46:12,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:12,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:16,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:16,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:46:16,422 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:46:16,475 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:46:16,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:16,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:16,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:16,574 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-03 08:46:16,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-03 08:46:16,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-03 08:46:16,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-03 08:46:16,576 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 107 states. [2018-10-03 08:46:16,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:16,889 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-10-03 08:46:16,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-03 08:46:16,889 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 212 [2018-10-03 08:46:16,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:16,890 INFO L225 Difference]: With dead ends: 217 [2018-10-03 08:46:16,890 INFO L226 Difference]: Without dead ends: 215 [2018-10-03 08:46:16,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-03 08:46:16,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-10-03 08:46:16,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-10-03 08:46:16,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-03 08:46:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-10-03 08:46:16,895 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2018-10-03 08:46:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:16,895 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-10-03 08:46:16,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-03 08:46:16,896 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-10-03 08:46:16,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-10-03 08:46:16,896 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:16,896 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1] [2018-10-03 08:46:16,896 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:16,897 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:16,897 INFO L82 PathProgramCache]: Analyzing trace with hash -752105711, now seen corresponding path program 105 times [2018-10-03 08:46:16,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:16,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:16,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:16,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:16,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:21,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:21,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:46:21,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:46:21,286 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-10-03 08:46:21,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:21,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:21,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:21,361 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-03 08:46:21,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-03 08:46:21,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-03 08:46:21,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-03 08:46:21,363 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 108 states. [2018-10-03 08:46:21,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:21,730 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-10-03 08:46:21,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-03 08:46:21,730 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 214 [2018-10-03 08:46:21,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:21,731 INFO L225 Difference]: With dead ends: 219 [2018-10-03 08:46:21,731 INFO L226 Difference]: Without dead ends: 217 [2018-10-03 08:46:21,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-03 08:46:21,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-10-03 08:46:21,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-10-03 08:46:21,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-10-03 08:46:21,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2018-10-03 08:46:21,736 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2018-10-03 08:46:21,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:21,736 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2018-10-03 08:46:21,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-03 08:46:21,736 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2018-10-03 08:46:21,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-10-03 08:46:21,737 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:21,737 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1] [2018-10-03 08:46:21,737 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:21,738 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:21,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1219030453, now seen corresponding path program 106 times [2018-10-03 08:46:21,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:21,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:21,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:21,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:21,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:25,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:25,980 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:46:25,987 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:46:26,038 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:46:26,039 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:26,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:26,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:26,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-10-03 08:46:26,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-03 08:46:26,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-03 08:46:26,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-03 08:46:26,111 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 109 states. [2018-10-03 08:46:26,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:26,411 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-10-03 08:46:26,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-03 08:46:26,411 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 216 [2018-10-03 08:46:26,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:26,412 INFO L225 Difference]: With dead ends: 221 [2018-10-03 08:46:26,412 INFO L226 Difference]: Without dead ends: 219 [2018-10-03 08:46:26,413 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-03 08:46:26,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-03 08:46:26,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-10-03 08:46:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-03 08:46:26,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-10-03 08:46:26,415 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2018-10-03 08:46:26,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:26,416 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-10-03 08:46:26,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-03 08:46:26,416 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-10-03 08:46:26,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-03 08:46:26,416 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:26,417 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1] [2018-10-03 08:46:26,417 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:26,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:26,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1037858565, now seen corresponding path program 107 times [2018-10-03 08:46:26,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:26,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:26,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:26,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:26,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:30,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:30,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:46:30,764 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:46:30,897 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2018-10-03 08:46:30,897 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:30,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:30,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:30,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-10-03 08:46:30,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-03 08:46:30,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-03 08:46:30,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-03 08:46:30,968 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 110 states. [2018-10-03 08:46:31,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:31,300 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-10-03 08:46:31,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-03 08:46:31,300 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 218 [2018-10-03 08:46:31,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:31,301 INFO L225 Difference]: With dead ends: 223 [2018-10-03 08:46:31,301 INFO L226 Difference]: Without dead ends: 221 [2018-10-03 08:46:31,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-03 08:46:31,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-03 08:46:31,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-10-03 08:46:31,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-03 08:46:31,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-10-03 08:46:31,307 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2018-10-03 08:46:31,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:31,307 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-10-03 08:46:31,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-03 08:46:31,308 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-10-03 08:46:31,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-10-03 08:46:31,308 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:31,309 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 1, 1, 1] [2018-10-03 08:46:31,309 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:31,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:31,309 INFO L82 PathProgramCache]: Analyzing trace with hash 949720383, now seen corresponding path program 108 times [2018-10-03 08:46:31,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:31,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:31,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:31,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:31,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:35,875 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:35,875 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:46:35,882 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:46:36,012 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 109 check-sat command(s) [2018-10-03 08:46:36,012 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:46:36,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:36,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:36,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-10-03 08:46:36,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-10-03 08:46:36,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-10-03 08:46:36,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-03 08:46:36,089 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 111 states. [2018-10-03 08:46:36,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:36,525 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-10-03 08:46:36,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-03 08:46:36,525 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 220 [2018-10-03 08:46:36,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:36,525 INFO L225 Difference]: With dead ends: 225 [2018-10-03 08:46:36,526 INFO L226 Difference]: Without dead ends: 223 [2018-10-03 08:46:36,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-10-03 08:46:36,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-03 08:46:36,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-10-03 08:46:36,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-03 08:46:36,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-10-03 08:46:36,530 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 220 [2018-10-03 08:46:36,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:36,530 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-10-03 08:46:36,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-10-03 08:46:36,530 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-10-03 08:46:36,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-03 08:46:36,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:36,531 INFO L375 BasicCegarLoop]: trace histogram [110, 109, 1, 1, 1] [2018-10-03 08:46:36,531 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:36,531 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:36,531 INFO L82 PathProgramCache]: Analyzing trace with hash -2146693895, now seen corresponding path program 109 times [2018-10-03 08:46:36,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:36,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:36,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:36,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:46:36,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:41,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:46:41,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:46:41,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:46:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:46:41,219 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:46:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:46:41,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:46:41,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-10-03 08:46:41,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-03 08:46:41,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-03 08:46:41,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-10-03 08:46:41,305 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 112 states. [2018-10-03 08:46:41,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:46:41,745 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2018-10-03 08:46:41,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-03 08:46:41,746 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 222 [2018-10-03 08:46:41,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:46:41,746 INFO L225 Difference]: With dead ends: 227 [2018-10-03 08:46:41,746 INFO L226 Difference]: Without dead ends: 225 [2018-10-03 08:46:41,747 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-10-03 08:46:41,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-10-03 08:46:41,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-10-03 08:46:41,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-10-03 08:46:41,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2018-10-03 08:46:41,750 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 222 [2018-10-03 08:46:41,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:46:41,750 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2018-10-03 08:46:41,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-03 08:46:41,751 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2018-10-03 08:46:41,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-10-03 08:46:41,751 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:46:41,751 INFO L375 BasicCegarLoop]: trace histogram [111, 110, 1, 1, 1] [2018-10-03 08:46:41,751 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:46:41,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:46:41,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1388478925, now seen corresponding path program 110 times [2018-10-03 08:46:41,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:46:41,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:46:41,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:41,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:46:41,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:46:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-03 08:46:43,976 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 08:46:43,980 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 08:46:43,980 INFO L202 PluginConnector]: Adding new model count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 08:46:43 BoogieIcfgContainer [2018-10-03 08:46:43,980 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 08:46:43,981 INFO L168 Benchmark]: Toolchain (without parser) took 233736.63 ms. Allocated memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: -41.9 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 192.7 MB). Peak memory consumption was 150.8 MB. Max. memory is 7.1 GB. [2018-10-03 08:46:43,982 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:46:43,982 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.81 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:46:43,982 INFO L168 Benchmark]: Boogie Preprocessor took 26.22 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:46:43,983 INFO L168 Benchmark]: RCFGBuilder took 314.08 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-03 08:46:43,983 INFO L168 Benchmark]: TraceAbstraction took 233343.29 ms. Allocated memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: -41.9 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 171.6 MB). Peak memory consumption was 129.6 MB. Max. memory is 7.1 GB. [2018-10-03 08:46:43,985 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 0.21 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.81 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.22 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 314.08 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 233343.29 ms. Allocated memory was 1.6 GB in the beginning and 1.5 GB in the end (delta: -41.9 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 171.6 MB). Peak memory consumption was 129.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 31). Cancelled while BasicCegarLoop was analyzing trace of length 225 with TraceHistMax 111, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 80 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 233.2s OverallTime, 111 OverallIterations, 111 TraceHistogramMax, 22.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 440 SDtfs, 0 SDslu, 9822 SDs, 0 SdLazy, 9932 SolverSat, 184 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18532 GetRequests, 12427 SyntacticMatches, 0 SemanticMatches, 6105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 189.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=225occurred in iteration=110, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 110 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 7.0s SatisfiabilityAnalysisTime, 194.7s InterpolantComputationTime, 24856 NumberOfCodeBlocks, 24856 NumberOfCodeBlocksAsserted, 3261 NumberOfCheckSat, 24637 ConstructedInterpolants, 0 QuantifiedInterpolants, 10891519 SizeOfPredicates, 109 NumberOfNonLiveVariables, 25397 ConjunctsInSsa, 6213 ConjunctsInUnsatCore, 219 InterpolantComputations, 1 PerfectInterpolantSequences, 0/887260 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/count_by_2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-03_08-46-43-993.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_08-46-43-993.csv Completed graceful shutdown