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/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:10:25,311 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:10:25,313 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:10:25,325 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-09-30 20:10:25,371 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 20:10:25,394 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:10:25,394 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:10:25,398 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:10:25,398 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:10:25,399 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:10:25,399 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:10:25,399 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:10:25,404 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:10:25,404 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:10:25,404 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:10:25,404 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:10:25,404 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:10:25,405 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:10:25,405 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:10:25,405 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:10:25,405 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:10:25,405 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:10:25,406 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:10:25,406 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:10:25,406 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:10:25,406 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:10:25,407 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:10:25,408 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:10:25,408 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:10:25,408 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:10:25,408 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:10:25,409 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:10:25,409 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:10:25,409 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:10:25,409 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:10:25,455 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:10:25,468 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:10:25,474 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:10:25,476 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:10:25,476 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:10:25,477 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-09-30 20:10:25,478 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl' [2018-09-30 20:10:25,534 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:10:25,537 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:10:25,537 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:10:25,538 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:10:25,538 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:10:25,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:10:25" (1/1) ... [2018-09-30 20:10:25,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:10:25" (1/1) ... [2018-09-30 20:10:25,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:10:25,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:10:25,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:10:25,582 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:10:25,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:10:25" (1/1) ... [2018-09-30 20:10:25,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:10:25" (1/1) ... [2018-09-30 20:10:25,594 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:10:25" (1/1) ... [2018-09-30 20:10:25,595 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:10:25" (1/1) ... [2018-09-30 20:10:25,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:10:25" (1/1) ... [2018-09-30 20:10:25,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:10:25" (1/1) ... [2018-09-30 20:10:25,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:10:25" (1/1) ... [2018-09-30 20:10:25,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:10:25,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:10:25,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:10:25,607 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:10:25,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:10:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:10:25,685 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-30 20:10:25,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 20:10:25,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 20:10:25,950 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 20:10:25,950 INFO L202 PluginConnector]: Adding new model down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:10:25 BoogieIcfgContainer [2018-09-30 20:10:25,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:10:25,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:10:25,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:10:25,955 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:10:25,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:10:25" (1/2) ... [2018-09-30 20:10:25,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@654567b0 and model type down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:10:25, skipping insertion in model container [2018-09-30 20:10:25,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:10:25" (2/2) ... [2018-09-30 20:10:25,959 INFO L112 eAbstractionObserver]: Analyzing ICFG down.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-09-30 20:10:25,968 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:10:25,976 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:10:26,026 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:10:26,027 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:10:26,027 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:10:26,027 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:10:26,027 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:10:26,027 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:10:26,028 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:10:26,028 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:10:26,028 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:10:26,043 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-09-30 20:10:26,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:10:26,050 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:26,051 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:10:26,052 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:26,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:26,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1951930377, now seen corresponding path program 1 times [2018-09-30 20:10:26,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:26,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:26,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:26,109 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:26,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:26,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:26,214 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:10:26,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 20:10:26,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:10:26,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:10:26,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:10:26,242 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-09-30 20:10:26,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:26,353 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2018-09-30 20:10:26,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:10:26,356 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-09-30 20:10:26,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:26,367 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:10:26,367 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 20:10:26,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 20:10:26,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 20:10:26,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2018-09-30 20:10:26,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 20:10:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2018-09-30 20:10:26,410 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 7 [2018-09-30 20:10:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:26,410 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2018-09-30 20:10:26,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:10:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2018-09-30 20:10:26,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 20:10:26,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:26,412 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:10:26,412 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:26,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:26,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1951989959, now seen corresponding path program 1 times [2018-09-30 20:10:26,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:26,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:26,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:26,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:26,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:26,494 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:10:26,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 20:10:26,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:10:26,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:10:26,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:10:26,498 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand 4 states. [2018-09-30 20:10:26,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:26,584 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2018-09-30 20:10:26,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:10:26,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-09-30 20:10:26,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:26,586 INFO L225 Difference]: With dead ends: 20 [2018-09-30 20:10:26,586 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 20:10:26,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:10:26,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 20:10:26,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 20:10:26,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 20:10:26,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2018-09-30 20:10:26,592 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 7 [2018-09-30 20:10:26,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:26,593 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2018-09-30 20:10:26,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:10:26,593 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2018-09-30 20:10:26,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:10:26,594 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:26,594 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:10:26,594 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:26,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:26,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1455783312, now seen corresponding path program 1 times [2018-09-30 20:10:26,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:26,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:26,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:26,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:26,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-30 20:10:26,643 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:10:26,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-09-30 20:10:26,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:10:26,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:10:26,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:10:26,644 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2018-09-30 20:10:26,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:26,720 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2018-09-30 20:10:26,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:10:26,720 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-30 20:10:26,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:26,722 INFO L225 Difference]: With dead ends: 19 [2018-09-30 20:10:26,722 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 20:10:26,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:10:26,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 20:10:26,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 13. [2018-09-30 20:10:26,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 20:10:26,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2018-09-30 20:10:26,728 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2018-09-30 20:10:26,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:26,729 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-09-30 20:10:26,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:10:26,729 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2018-09-30 20:10:26,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:10:26,730 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:26,730 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:10:26,730 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:26,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:26,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1455723730, now seen corresponding path program 1 times [2018-09-30 20:10:26,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:26,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:26,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:26,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:26,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:26,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:26,789 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:10:26,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-30 20:10:26,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:10:26,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:10:26,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:10:26,791 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 4 states. [2018-09-30 20:10:26,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:26,862 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2018-09-30 20:10:26,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:10:26,863 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-30 20:10:26,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:26,865 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:10:26,865 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:10:26,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-30 20:10:26,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:10:26,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-09-30 20:10:26,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 20:10:26,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2018-09-30 20:10:26,871 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2018-09-30 20:10:26,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:26,872 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2018-09-30 20:10:26,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:10:26,872 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2018-09-30 20:10:26,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 20:10:26,873 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:26,873 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:10:26,874 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:26,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:26,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1394403420, now seen corresponding path program 1 times [2018-09-30 20:10:26,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:26,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:26,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:26,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:26,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:27,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:27,061 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:27,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:27,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:27,119 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:27,137 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:27,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:27,161 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 20:10:27,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:10:27,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:10:27,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:10:27,163 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 6 states. [2018-09-30 20:10:27,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:27,327 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-09-30 20:10:27,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:10:27,330 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-09-30 20:10:27,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:27,331 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:10:27,331 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 20:10:27,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:10:27,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 20:10:27,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 20:10:27,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 20:10:27,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-30 20:10:27,337 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2018-09-30 20:10:27,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:27,337 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-30 20:10:27,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:10:27,338 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-30 20:10:27,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 20:10:27,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:27,339 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-30 20:10:27,339 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:27,339 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:27,339 INFO L82 PathProgramCache]: Analyzing trace with hash -961145443, now seen corresponding path program 2 times [2018-09-30 20:10:27,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:27,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:27,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:27,341 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:27,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:27,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:27,568 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:27,585 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:10:27,619 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:10:27,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:27,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:27,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:27,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 20:10:27,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:10:27,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:10:27,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:10:27,658 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2018-09-30 20:10:27,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:27,730 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-09-30 20:10:27,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:10:27,731 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-09-30 20:10:27,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:27,732 INFO L225 Difference]: With dead ends: 30 [2018-09-30 20:10:27,732 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 20:10:27,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 20:10:27,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 20:10:27,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2018-09-30 20:10:27,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 20:10:27,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-09-30 20:10:27,739 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2018-09-30 20:10:27,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:27,739 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-09-30 20:10:27,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:10:27,740 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-09-30 20:10:27,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 20:10:27,740 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:27,741 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-30 20:10:27,741 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:27,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:27,742 INFO L82 PathProgramCache]: Analyzing trace with hash -552275309, now seen corresponding path program 3 times [2018-09-30 20:10:27,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:27,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:27,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:27,743 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:27,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:27,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:27,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:27,970 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:10:27,993 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 20:10:27,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:27,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:28,030 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:28,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:10:28,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:10:28,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:10:28,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:10:28,032 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2018-09-30 20:10:28,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:28,157 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-09-30 20:10:28,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:10:28,158 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-09-30 20:10:28,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:28,159 INFO L225 Difference]: With dead ends: 40 [2018-09-30 20:10:28,159 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 20:10:28,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:10:28,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 20:10:28,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 20:10:28,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 20:10:28,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-09-30 20:10:28,165 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2018-09-30 20:10:28,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:28,165 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-09-30 20:10:28,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:10:28,166 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-09-30 20:10:28,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:10:28,166 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:28,167 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2018-09-30 20:10:28,167 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:28,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:28,167 INFO L82 PathProgramCache]: Analyzing trace with hash 2071906362, now seen corresponding path program 4 times [2018-09-30 20:10:28,168 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:28,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:28,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:28,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:28,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:28,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:28,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:28,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:28,283 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:10:28,296 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:10:28,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:28,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:28,304 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:28,327 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:28,328 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 20:10:28,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:10:28,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:10:28,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:10:28,329 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2018-09-30 20:10:28,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:28,606 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-09-30 20:10:28,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:10:28,607 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-09-30 20:10:28,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:28,608 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:10:28,608 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:10:28,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 20:10:28,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:10:28,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2018-09-30 20:10:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 20:10:28,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-30 20:10:28,620 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 18 [2018-09-30 20:10:28,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:28,621 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-30 20:10:28,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:10:28,621 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-30 20:10:28,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:10:28,623 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:28,623 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 20:10:28,624 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:28,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:28,624 INFO L82 PathProgramCache]: Analyzing trace with hash -992407888, now seen corresponding path program 5 times [2018-09-30 20:10:28,624 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:28,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:28,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:28,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:28,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:28,773 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:28,773 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:28,790 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:10:28,828 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 20:10:28,829 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:28,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:28,875 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:28,875 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:10:28,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:10:28,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:10:28,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:10:28,876 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-09-30 20:10:29,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:29,009 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-09-30 20:10:29,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:10:29,009 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-09-30 20:10:29,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:29,010 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:10:29,010 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 20:10:29,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:10:29,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 20:10:29,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 20:10:29,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 20:10:29,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-09-30 20:10:29,017 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2018-09-30 20:10:29,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:29,017 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-09-30 20:10:29,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:10:29,018 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-09-30 20:10:29,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 20:10:29,018 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:29,019 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2018-09-30 20:10:29,019 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:29,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:29,019 INFO L82 PathProgramCache]: Analyzing trace with hash 390441321, now seen corresponding path program 6 times [2018-09-30 20:10:29,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:29,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:29,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:29,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:29,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:29,107 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:29,107 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:29,115 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:10:29,148 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 20:10:29,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:29,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:29,180 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:29,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:10:29,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:10:29,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:10:29,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:10:29,182 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2018-09-30 20:10:29,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:29,245 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2018-09-30 20:10:29,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:10:29,245 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-09-30 20:10:29,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:29,247 INFO L225 Difference]: With dead ends: 40 [2018-09-30 20:10:29,247 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 20:10:29,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 20:10:29,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 20:10:29,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2018-09-30 20:10:29,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 20:10:29,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-09-30 20:10:29,256 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2018-09-30 20:10:29,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:29,256 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-09-30 20:10:29,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:10:29,256 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-09-30 20:10:29,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 20:10:29,257 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:29,257 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-09-30 20:10:29,258 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:29,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:29,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1927135327, now seen corresponding path program 7 times [2018-09-30 20:10:29,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:29,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:29,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:29,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:29,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:29,570 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:29,570 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:29,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:29,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:29,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:29,624 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:29,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:29,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 20:10:29,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:10:29,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:10:29,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:10:29,647 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 12 states. [2018-09-30 20:10:29,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:29,924 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2018-09-30 20:10:29,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:10:29,924 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2018-09-30 20:10:29,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:29,925 INFO L225 Difference]: With dead ends: 58 [2018-09-30 20:10:29,925 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:10:29,926 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:10:29,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:10:29,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 20:10:29,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 20:10:29,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-09-30 20:10:29,933 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-09-30 20:10:29,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:29,934 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-09-30 20:10:29,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:10:29,934 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-09-30 20:10:29,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 20:10:29,935 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:29,935 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2018-09-30 20:10:29,935 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:29,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:29,936 INFO L82 PathProgramCache]: Analyzing trace with hash -906890938, now seen corresponding path program 8 times [2018-09-30 20:10:29,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:29,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:29,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:29,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:29,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:30,034 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:30,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:30,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:30,050 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:10:30,095 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:10:30,096 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:30,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:30,140 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:30,140 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:10:30,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:10:30,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:10:30,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:10:30,142 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 8 states. [2018-09-30 20:10:30,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:30,223 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-09-30 20:10:30,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:10:30,223 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2018-09-30 20:10:30,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:30,224 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:10:30,224 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:10:30,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 20:10:30,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:10:30,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-09-30 20:10:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:10:30,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-09-30 20:10:30,232 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2018-09-30 20:10:30,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:30,233 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-09-30 20:10:30,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:10:30,233 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-09-30 20:10:30,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 20:10:30,234 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:30,234 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-09-30 20:10:30,235 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:30,235 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:30,235 INFO L82 PathProgramCache]: Analyzing trace with hash -466038340, now seen corresponding path program 9 times [2018-09-30 20:10:30,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:30,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:30,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:30,236 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:30,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:30,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:30,406 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:30,407 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:30,407 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:30,415 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:10:30,518 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 20:10:30,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:30,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:30,539 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:30,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:30,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 20:10:30,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:10:30,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:10:30,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:10:30,576 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 14 states. [2018-09-30 20:10:31,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:31,152 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2018-09-30 20:10:31,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:10:31,153 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2018-09-30 20:10:31,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:31,154 INFO L225 Difference]: With dead ends: 67 [2018-09-30 20:10:31,154 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 20:10:31,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:10:31,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 20:10:31,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 20:10:31,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 20:10:31,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-09-30 20:10:31,162 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2018-09-30 20:10:31,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:31,163 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-09-30 20:10:31,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:10:31,163 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-09-30 20:10:31,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 20:10:31,164 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:31,164 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2018-09-30 20:10:31,164 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:31,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:31,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1282545973, now seen corresponding path program 10 times [2018-09-30 20:10:31,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:31,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:31,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:31,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:31,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:31,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:31,302 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:31,309 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:10:31,337 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:10:31,338 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:31,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:31,351 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:31,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:31,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:10:31,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:10:31,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:10:31,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:10:31,385 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 9 states. [2018-09-30 20:10:31,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:31,722 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2018-09-30 20:10:31,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:10:31,722 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-09-30 20:10:31,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:31,724 INFO L225 Difference]: With dead ends: 50 [2018-09-30 20:10:31,724 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 20:10:31,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 20:10:31,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 20:10:31,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2018-09-30 20:10:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 20:10:31,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-09-30 20:10:31,733 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2018-09-30 20:10:31,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:31,733 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-09-30 20:10:31,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:10:31,733 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-09-30 20:10:31,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 20:10:31,734 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:31,735 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-09-30 20:10:31,735 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:31,735 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:31,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1500867115, now seen corresponding path program 11 times [2018-09-30 20:10:31,736 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:31,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:31,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:31,737 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:31,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:31,948 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:31,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:31,956 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:10:31,992 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 20:10:31,992 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:31,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:32,007 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:32,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:32,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 20:10:32,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:10:32,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:10:32,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:10:32,038 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 16 states. [2018-09-30 20:10:32,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:32,352 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2018-09-30 20:10:32,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:10:32,352 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2018-09-30 20:10:32,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:32,353 INFO L225 Difference]: With dead ends: 76 [2018-09-30 20:10:32,353 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:10:32,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:10:32,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:10:32,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 20:10:32,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 20:10:32,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-09-30 20:10:32,361 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2018-09-30 20:10:32,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:32,361 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-09-30 20:10:32,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:10:32,361 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-09-30 20:10:32,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 20:10:32,362 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:32,362 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1] [2018-09-30 20:10:32,363 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:32,363 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:32,363 INFO L82 PathProgramCache]: Analyzing trace with hash 594208338, now seen corresponding path program 12 times [2018-09-30 20:10:32,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:32,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:32,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:32,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:32,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 40 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:32,466 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:32,466 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:32,474 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:10:32,496 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:10:32,496 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:32,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 40 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:32,542 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:32,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:10:32,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:10:32,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:10:32,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:10:32,543 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 10 states. [2018-09-30 20:10:32,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:32,675 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2018-09-30 20:10:32,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:10:32,676 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2018-09-30 20:10:32,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:32,677 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:10:32,677 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:10:32,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 20:10:32,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:10:32,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2018-09-30 20:10:32,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 20:10:32,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-09-30 20:10:32,685 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 38 [2018-09-30 20:10:32,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:32,686 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-09-30 20:10:32,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:10:32,686 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-09-30 20:10:32,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 20:10:32,687 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:32,687 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-09-30 20:10:32,687 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:32,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:32,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1054367944, now seen corresponding path program 13 times [2018-09-30 20:10:32,688 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:32,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:32,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:32,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:32,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 112 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:32,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:32,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:32,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:32,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 112 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:33,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:33,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 20:10:33,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:10:33,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:10:33,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:10:33,014 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 18 states. [2018-09-30 20:10:33,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:33,677 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2018-09-30 20:10:33,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:10:33,677 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2018-09-30 20:10:33,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:33,678 INFO L225 Difference]: With dead ends: 85 [2018-09-30 20:10:33,679 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 20:10:33,680 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:10:33,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 20:10:33,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 20:10:33,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 20:10:33,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-09-30 20:10:33,687 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2018-09-30 20:10:33,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:33,687 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-09-30 20:10:33,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:10:33,687 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-09-30 20:10:33,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 20:10:33,688 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:33,688 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2018-09-30 20:10:33,688 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:33,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:33,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1098736897, now seen corresponding path program 14 times [2018-09-30 20:10:33,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:33,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:33,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:33,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:33,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 50 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:33,929 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:33,929 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:33,940 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:10:33,978 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:10:33,979 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:33,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:34,007 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 50 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:34,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:34,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:10:34,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:10:34,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:10:34,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:10:34,038 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2018-09-30 20:10:34,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:34,146 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2018-09-30 20:10:34,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:10:34,146 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2018-09-30 20:10:34,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:34,147 INFO L225 Difference]: With dead ends: 60 [2018-09-30 20:10:34,148 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 20:10:34,148 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 20:10:34,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 20:10:34,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2018-09-30 20:10:34,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 20:10:34,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-09-30 20:10:34,157 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 43 [2018-09-30 20:10:34,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:34,157 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-09-30 20:10:34,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:10:34,157 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-09-30 20:10:34,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 20:10:34,158 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:34,158 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-09-30 20:10:34,159 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:34,159 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:34,159 INFO L82 PathProgramCache]: Analyzing trace with hash -48369673, now seen corresponding path program 15 times [2018-09-30 20:10:34,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:34,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:34,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:34,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:34,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 144 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:34,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:34,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:34,757 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:10:34,787 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 20:10:34,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:34,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:34,808 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 144 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:34,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:34,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 20:10:34,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:10:34,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:10:34,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:10:34,832 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 20 states. [2018-09-30 20:10:35,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:35,453 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2018-09-30 20:10:35,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:10:35,454 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2018-09-30 20:10:35,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:35,455 INFO L225 Difference]: With dead ends: 94 [2018-09-30 20:10:35,455 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:10:35,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:10:35,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:10:35,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 20:10:35,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 20:10:35,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2018-09-30 20:10:35,462 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 47 [2018-09-30 20:10:35,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:35,463 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2018-09-30 20:10:35,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:10:35,463 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2018-09-30 20:10:35,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 20:10:35,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:35,464 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1] [2018-09-30 20:10:35,464 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:35,464 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:35,464 INFO L82 PathProgramCache]: Analyzing trace with hash 239052638, now seen corresponding path program 16 times [2018-09-30 20:10:35,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:35,465 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:35,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:35,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:35,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 61 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:35,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:35,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:35,622 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:10:35,646 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:10:35,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:35,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 61 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:35,689 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:35,689 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 20:10:35,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:10:35,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:10:35,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:10:35,691 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 12 states. [2018-09-30 20:10:35,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:35,826 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2018-09-30 20:10:35,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:10:35,826 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2018-09-30 20:10:35,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:35,828 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:10:35,828 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:10:35,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 20:10:35,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:10:35,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-09-30 20:10:35,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 20:10:35,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-09-30 20:10:35,837 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 48 [2018-09-30 20:10:35,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:35,837 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-09-30 20:10:35,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:10:35,838 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-09-30 20:10:35,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 20:10:35,839 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:35,839 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-09-30 20:10:35,839 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:35,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:35,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1074641876, now seen corresponding path program 17 times [2018-09-30 20:10:35,840 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:35,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:35,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:35,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:35,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 180 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:36,160 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:36,160 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:36,168 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:10:36,199 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 20:10:36,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:36,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 180 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:36,240 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:36,240 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 20:10:36,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:10:36,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:10:36,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:10:36,241 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2018-09-30 20:10:36,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:36,839 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2018-09-30 20:10:36,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:10:36,840 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2018-09-30 20:10:36,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:36,840 INFO L225 Difference]: With dead ends: 103 [2018-09-30 20:10:36,840 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 20:10:36,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=731, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:10:36,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 20:10:36,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 20:10:36,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 20:10:36,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-09-30 20:10:36,847 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2018-09-30 20:10:36,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:36,848 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-09-30 20:10:36,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:10:36,848 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-09-30 20:10:36,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 20:10:36,849 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:36,849 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2018-09-30 20:10:36,849 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:36,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:36,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1305899827, now seen corresponding path program 18 times [2018-09-30 20:10:36,850 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:36,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:36,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:36,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:36,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 73 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:36,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:36,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:37,007 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:10:37,041 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 20:10:37,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:37,044 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 73 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:37,078 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:37,078 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 20:10:37,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:10:37,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:10:37,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:10:37,079 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 13 states. [2018-09-30 20:10:37,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:37,144 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2018-09-30 20:10:37,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:10:37,146 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2018-09-30 20:10:37,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:37,147 INFO L225 Difference]: With dead ends: 70 [2018-09-30 20:10:37,147 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 20:10:37,147 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 20:10:37,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 20:10:37,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2018-09-30 20:10:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 20:10:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-09-30 20:10:37,154 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 53 [2018-09-30 20:10:37,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:37,155 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-09-30 20:10:37,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:10:37,155 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-09-30 20:10:37,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 20:10:37,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:37,156 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-09-30 20:10:37,156 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:37,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:37,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1754878403, now seen corresponding path program 19 times [2018-09-30 20:10:37,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:37,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:37,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:37,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:37,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 220 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:37,524 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:37,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:37,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:37,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:37,580 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 220 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:37,612 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:37,612 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 20:10:37,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:10:37,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:10:37,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:10:37,614 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 24 states. [2018-09-30 20:10:38,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:38,075 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2018-09-30 20:10:38,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:10:38,075 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2018-09-30 20:10:38,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:38,076 INFO L225 Difference]: With dead ends: 112 [2018-09-30 20:10:38,076 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 20:10:38,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 20:10:38,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 20:10:38,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 20:10:38,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 20:10:38,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-09-30 20:10:38,084 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 57 [2018-09-30 20:10:38,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:38,085 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-09-30 20:10:38,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:10:38,085 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-09-30 20:10:38,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 20:10:38,085 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:38,086 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2018-09-30 20:10:38,086 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:38,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:38,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1471794070, now seen corresponding path program 20 times [2018-09-30 20:10:38,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:38,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:38,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:38,087 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:38,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 86 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:38,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:38,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:38,409 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:10:38,436 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:10:38,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:38,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 86 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:38,471 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:38,472 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 20:10:38,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:10:38,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:10:38,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:10:38,473 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 14 states. [2018-09-30 20:10:38,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:38,636 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2018-09-30 20:10:38,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:10:38,637 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2018-09-30 20:10:38,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:38,638 INFO L225 Difference]: With dead ends: 75 [2018-09-30 20:10:38,638 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 20:10:38,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 20:10:38,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 20:10:38,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2018-09-30 20:10:38,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 20:10:38,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-09-30 20:10:38,646 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 58 [2018-09-30 20:10:38,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:38,646 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-09-30 20:10:38,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:10:38,647 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-09-30 20:10:38,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 20:10:38,647 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:38,647 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2018-09-30 20:10:38,648 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:38,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:38,648 INFO L82 PathProgramCache]: Analyzing trace with hash 716104416, now seen corresponding path program 21 times [2018-09-30 20:10:38,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:38,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:38,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:38,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:38,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 264 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:39,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:39,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:39,827 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:10:39,862 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 20:10:39,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:39,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 264 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:39,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:39,910 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 20:10:39,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:10:39,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:10:39,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:10:39,911 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 26 states. [2018-09-30 20:10:40,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:40,285 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2018-09-30 20:10:40,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:10:40,286 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2018-09-30 20:10:40,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:40,286 INFO L225 Difference]: With dead ends: 121 [2018-09-30 20:10:40,286 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 20:10:40,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:10:40,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 20:10:40,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 20:10:40,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 20:10:40,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-09-30 20:10:40,294 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2018-09-30 20:10:40,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:40,294 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-09-30 20:10:40,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:10:40,294 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-09-30 20:10:40,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 20:10:40,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:40,295 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 1, 1, 1, 1, 1] [2018-09-30 20:10:40,295 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:40,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:40,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1699180391, now seen corresponding path program 22 times [2018-09-30 20:10:40,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:40,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:40,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:40,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:40,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:40,673 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:40,673 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:40,673 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:40,688 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:10:40,725 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:10:40,726 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:40,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:40,762 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:40,762 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 20:10:40,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:10:40,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:10:40,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:10:40,763 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 15 states. [2018-09-30 20:10:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:40,852 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2018-09-30 20:10:40,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:10:40,852 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2018-09-30 20:10:40,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:40,853 INFO L225 Difference]: With dead ends: 80 [2018-09-30 20:10:40,853 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 20:10:40,854 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 20:10:40,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 20:10:40,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2018-09-30 20:10:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 20:10:40,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-09-30 20:10:40,861 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2018-09-30 20:10:40,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:40,862 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-09-30 20:10:40,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:10:40,862 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-09-30 20:10:40,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 20:10:40,862 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:40,863 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2018-09-30 20:10:40,863 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:40,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:40,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1490448497, now seen corresponding path program 23 times [2018-09-30 20:10:40,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:40,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:40,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:40,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:40,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 312 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:41,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:41,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:41,421 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:10:41,463 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 20:10:41,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:41,465 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 312 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:41,500 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:41,500 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 20:10:41,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:10:41,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:10:41,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:10:41,501 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 28 states. [2018-09-30 20:10:41,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:41,955 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2018-09-30 20:10:41,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:10:41,955 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 67 [2018-09-30 20:10:41,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:41,956 INFO L225 Difference]: With dead ends: 130 [2018-09-30 20:10:41,956 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 20:10:41,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 20:10:41,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 20:10:41,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 20:10:41,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 20:10:41,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2018-09-30 20:10:41,965 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2018-09-30 20:10:41,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:41,965 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2018-09-30 20:10:41,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:10:41,965 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2018-09-30 20:10:41,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 20:10:41,966 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:41,966 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2018-09-30 20:10:41,966 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:41,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:41,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1188334966, now seen corresponding path program 24 times [2018-09-30 20:10:41,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:41,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:41,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:41,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:41,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 115 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:42,463 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:42,463 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:42,476 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:10:42,516 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 20:10:42,516 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:42,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 115 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:42,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:42,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 20:10:42,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:10:42,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:10:42,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:10:42,555 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 16 states. [2018-09-30 20:10:42,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:42,656 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2018-09-30 20:10:42,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:10:42,656 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2018-09-30 20:10:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:42,657 INFO L225 Difference]: With dead ends: 85 [2018-09-30 20:10:42,657 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 20:10:42,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 20:10:42,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 20:10:42,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-09-30 20:10:42,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 20:10:42,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2018-09-30 20:10:42,665 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 68 [2018-09-30 20:10:42,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:42,666 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2018-09-30 20:10:42,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:10:42,666 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2018-09-30 20:10:42,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 20:10:42,666 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:42,666 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2018-09-30 20:10:42,667 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:42,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:42,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1190013460, now seen corresponding path program 25 times [2018-09-30 20:10:42,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:42,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:42,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:42,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:42,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:43,891 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 364 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:43,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:43,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:43,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:43,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:43,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:43,959 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 364 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:43,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:43,985 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 20:10:43,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:10:43,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:10:43,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:10:43,986 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 30 states. [2018-09-30 20:10:44,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:44,758 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2018-09-30 20:10:44,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:10:44,758 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 72 [2018-09-30 20:10:44,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:44,759 INFO L225 Difference]: With dead ends: 139 [2018-09-30 20:10:44,760 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 20:10:44,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:10:44,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 20:10:44,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 20:10:44,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 20:10:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-09-30 20:10:44,769 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 72 [2018-09-30 20:10:44,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:44,769 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-09-30 20:10:44,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:10:44,769 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-09-30 20:10:44,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 20:10:44,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:44,770 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 1, 1, 1, 1, 1] [2018-09-30 20:10:44,770 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:44,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:44,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1746112411, now seen corresponding path program 26 times [2018-09-30 20:10:44,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:44,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:44,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:44,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:44,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 131 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:45,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:45,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:45,534 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:10:45,570 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:10:45,570 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:45,572 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:45,582 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 131 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:45,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:45,603 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 20:10:45,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:10:45,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:10:45,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:10:45,604 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 17 states. [2018-09-30 20:10:45,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:45,720 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2018-09-30 20:10:45,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:10:45,721 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2018-09-30 20:10:45,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:45,722 INFO L225 Difference]: With dead ends: 90 [2018-09-30 20:10:45,722 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 20:10:45,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 20:10:45,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 20:10:45,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2018-09-30 20:10:45,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 20:10:45,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-09-30 20:10:45,731 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2018-09-30 20:10:45,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:45,731 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-09-30 20:10:45,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:10:45,731 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-09-30 20:10:45,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 20:10:45,732 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:45,732 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2018-09-30 20:10:45,732 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:45,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:45,733 INFO L82 PathProgramCache]: Analyzing trace with hash 613460315, now seen corresponding path program 27 times [2018-09-30 20:10:45,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:45,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:45,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:45,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:45,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 420 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:46,195 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:46,195 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:46,203 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:10:46,254 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 20:10:46,254 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:46,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:46,269 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 420 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:46,291 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:46,291 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 20:10:46,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:10:46,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:10:46,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:10:46,292 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 32 states. [2018-09-30 20:10:47,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:47,111 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2018-09-30 20:10:47,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:10:47,112 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 77 [2018-09-30 20:10:47,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:47,113 INFO L225 Difference]: With dead ends: 148 [2018-09-30 20:10:47,113 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 20:10:47,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=541, Invalid=1621, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:10:47,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 20:10:47,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 20:10:47,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 20:10:47,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2018-09-30 20:10:47,120 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2018-09-30 20:10:47,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:47,120 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2018-09-30 20:10:47,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:10:47,120 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2018-09-30 20:10:47,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 20:10:47,121 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:47,121 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2018-09-30 20:10:47,121 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:47,121 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:47,121 INFO L82 PathProgramCache]: Analyzing trace with hash 381727362, now seen corresponding path program 28 times [2018-09-30 20:10:47,121 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:47,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:47,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:47,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:47,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:47,338 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 148 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:47,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:47,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:47,346 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:10:47,382 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:10:47,382 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:47,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 148 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:47,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:47,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 20:10:47,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:10:47,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:10:47,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:10:47,422 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 18 states. [2018-09-30 20:10:47,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:47,541 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2018-09-30 20:10:47,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:10:47,541 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2018-09-30 20:10:47,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:47,542 INFO L225 Difference]: With dead ends: 95 [2018-09-30 20:10:47,542 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 20:10:47,543 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 20:10:47,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 20:10:47,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2018-09-30 20:10:47,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 20:10:47,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-09-30 20:10:47,552 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 78 [2018-09-30 20:10:47,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:47,553 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-09-30 20:10:47,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:10:47,553 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-09-30 20:10:47,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 20:10:47,554 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:47,554 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2018-09-30 20:10:47,554 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:47,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:47,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1123248904, now seen corresponding path program 29 times [2018-09-30 20:10:47,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:47,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:47,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:47,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:47,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 480 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:48,253 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:48,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:48,260 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:10:48,452 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 20:10:48,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:48,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 480 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:48,490 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:48,490 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 20:10:48,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:10:48,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:10:48,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:10:48,491 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 34 states. [2018-09-30 20:10:49,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:49,580 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2018-09-30 20:10:49,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:10:49,581 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 82 [2018-09-30 20:10:49,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:49,582 INFO L225 Difference]: With dead ends: 157 [2018-09-30 20:10:49,582 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 20:10:49,583 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=609, Invalid=1841, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:10:49,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 20:10:49,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 20:10:49,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 20:10:49,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-09-30 20:10:49,593 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 82 [2018-09-30 20:10:49,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:49,593 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-09-30 20:10:49,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:10:49,593 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-09-30 20:10:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 20:10:49,594 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:49,594 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 1, 1, 1, 1, 1] [2018-09-30 20:10:49,594 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:49,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:49,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1191652401, now seen corresponding path program 30 times [2018-09-30 20:10:49,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:49,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:49,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:49,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:49,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 166 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:50,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:50,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:50,024 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:10:50,074 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 20:10:50,075 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:50,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 166 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:50,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:50,124 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 20:10:50,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:10:50,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:10:50,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:10:50,125 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 19 states. [2018-09-30 20:10:50,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:50,238 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2018-09-30 20:10:50,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:10:50,238 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 83 [2018-09-30 20:10:50,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:50,239 INFO L225 Difference]: With dead ends: 100 [2018-09-30 20:10:50,240 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 20:10:50,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 20:10:50,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 20:10:50,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2018-09-30 20:10:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 20:10:50,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2018-09-30 20:10:50,249 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 83 [2018-09-30 20:10:50,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:50,249 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2018-09-30 20:10:50,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:10:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2018-09-30 20:10:50,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 20:10:50,250 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:50,250 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2018-09-30 20:10:50,251 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:50,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:50,251 INFO L82 PathProgramCache]: Analyzing trace with hash 219193127, now seen corresponding path program 31 times [2018-09-30 20:10:50,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:50,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:50,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:50,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:50,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 544 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:51,371 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:51,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:51,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:51,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 544 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:51,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:51,466 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 20:10:51,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:10:51,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:10:51,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:10:51,468 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 36 states. [2018-09-30 20:10:52,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:52,104 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2018-09-30 20:10:52,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:10:52,104 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 87 [2018-09-30 20:10:52,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:52,105 INFO L225 Difference]: With dead ends: 166 [2018-09-30 20:10:52,105 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 20:10:52,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=681, Invalid=2075, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:10:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 20:10:52,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 20:10:52,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 20:10:52,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-09-30 20:10:52,116 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 87 [2018-09-30 20:10:52,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:52,116 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-09-30 20:10:52,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:10:52,116 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-09-30 20:10:52,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 20:10:52,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:52,117 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 1, 1, 1, 1, 1] [2018-09-30 20:10:52,117 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:52,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:52,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1134517362, now seen corresponding path program 32 times [2018-09-30 20:10:52,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:52,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:52,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:52,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:10:52,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:52,357 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 185 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:52,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:52,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:52,364 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:10:52,405 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:10:52,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:52,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 185 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:52,443 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:52,443 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 20:10:52,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:10:52,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:10:52,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:10:52,444 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 20 states. [2018-09-30 20:10:52,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:52,557 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2018-09-30 20:10:52,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:10:52,557 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 88 [2018-09-30 20:10:52,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:52,558 INFO L225 Difference]: With dead ends: 105 [2018-09-30 20:10:52,558 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 20:10:52,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 20:10:52,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 20:10:52,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-09-30 20:10:52,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 20:10:52,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-09-30 20:10:52,569 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 88 [2018-09-30 20:10:52,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:52,570 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-09-30 20:10:52,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:10:52,570 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-09-30 20:10:52,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 20:10:52,570 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:52,570 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2018-09-30 20:10:52,571 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:52,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:52,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1074454524, now seen corresponding path program 33 times [2018-09-30 20:10:52,571 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:52,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:52,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:52,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:52,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 612 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:53,324 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:53,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:53,333 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:10:53,391 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 20:10:53,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:53,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 612 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:53,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:53,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 20:10:53,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:10:53,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:10:53,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:10:53,430 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 38 states. [2018-09-30 20:10:54,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:54,876 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2018-09-30 20:10:54,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:10:54,877 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 92 [2018-09-30 20:10:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:54,878 INFO L225 Difference]: With dead ends: 175 [2018-09-30 20:10:54,878 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 20:10:54,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=757, Invalid=2323, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 20:10:54,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 20:10:54,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 20:10:54,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 20:10:54,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2018-09-30 20:10:54,886 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 92 [2018-09-30 20:10:54,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:54,886 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2018-09-30 20:10:54,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:10:54,887 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2018-09-30 20:10:54,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 20:10:54,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:54,887 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2018-09-30 20:10:54,887 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:54,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:54,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1513438211, now seen corresponding path program 34 times [2018-09-30 20:10:54,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:54,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:54,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:54,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:54,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 205 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:55,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:55,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:55,205 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:10:55,248 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:10:55,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:55,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 205 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:55,298 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:55,298 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 20:10:55,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:10:55,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:10:55,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:10:55,299 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 21 states. [2018-09-30 20:10:55,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:55,902 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2018-09-30 20:10:55,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:10:55,902 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2018-09-30 20:10:55,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:55,902 INFO L225 Difference]: With dead ends: 110 [2018-09-30 20:10:55,903 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 20:10:55,903 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 20:10:55,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 20:10:55,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2018-09-30 20:10:55,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 20:10:55,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-09-30 20:10:55,910 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2018-09-30 20:10:55,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:55,910 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-09-30 20:10:55,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:10:55,911 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-09-30 20:10:55,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 20:10:55,911 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:55,911 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 1, 1, 1, 1, 1] [2018-09-30 20:10:55,911 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:55,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:55,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1385467661, now seen corresponding path program 35 times [2018-09-30 20:10:55,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:55,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:55,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:55,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:55,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:55,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 684 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:58,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:58,257 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:58,278 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:10:58,338 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 20:10:58,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:58,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:58,360 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 684 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:58,388 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:58,388 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 20:10:58,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 20:10:58,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 20:10:58,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 20:10:58,389 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 40 states. [2018-09-30 20:10:59,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:59,272 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2018-09-30 20:10:59,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:10:59,272 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 97 [2018-09-30 20:10:59,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:59,273 INFO L225 Difference]: With dead ends: 184 [2018-09-30 20:10:59,273 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 20:10:59,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 20:10:59,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 20:10:59,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 20:10:59,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 20:10:59,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-09-30 20:10:59,282 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 97 [2018-09-30 20:10:59,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:59,282 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-09-30 20:10:59,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 20:10:59,282 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-09-30 20:10:59,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 20:10:59,283 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:59,283 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 1, 1, 1, 1, 1] [2018-09-30 20:10:59,283 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:59,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:59,284 INFO L82 PathProgramCache]: Analyzing trace with hash -209035110, now seen corresponding path program 36 times [2018-09-30 20:10:59,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:59,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:59,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:59,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:59,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:59,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:10:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 226 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:59,600 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:10:59,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:10:59,607 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:10:59,669 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 20:10:59,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:10:59,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:10:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 226 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:10:59,708 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:10:59,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 20:10:59,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:10:59,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:10:59,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:10:59,709 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 22 states. [2018-09-30 20:10:59,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:10:59,844 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2018-09-30 20:10:59,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:10:59,845 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2018-09-30 20:10:59,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:10:59,845 INFO L225 Difference]: With dead ends: 115 [2018-09-30 20:10:59,845 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 20:10:59,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 20:10:59,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 20:10:59,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2018-09-30 20:10:59,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 20:10:59,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-09-30 20:10:59,854 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 98 [2018-09-30 20:10:59,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:10:59,855 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-09-30 20:10:59,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:10:59,855 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-09-30 20:10:59,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 20:10:59,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:10:59,855 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 1, 1, 1, 1, 1] [2018-09-30 20:10:59,856 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:10:59,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:10:59,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1566476528, now seen corresponding path program 37 times [2018-09-30 20:10:59,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:10:59,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:10:59,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:59,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:10:59,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:10:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 760 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:00,438 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:00,438 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:00,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:00,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:00,509 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 760 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:00,539 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:00,540 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 20:11:00,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:11:00,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:11:00,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:11:00,541 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 42 states. [2018-09-30 20:11:02,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:02,150 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2018-09-30 20:11:02,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:11:02,150 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 102 [2018-09-30 20:11:02,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:02,151 INFO L225 Difference]: With dead ends: 193 [2018-09-30 20:11:02,151 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 20:11:02,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=921, Invalid=2861, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 20:11:02,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 20:11:02,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 20:11:02,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 20:11:02,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-09-30 20:11:02,164 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 102 [2018-09-30 20:11:02,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:02,165 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-09-30 20:11:02,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:11:02,165 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-09-30 20:11:02,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 20:11:02,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:02,166 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 1, 1, 1, 1, 1] [2018-09-30 20:11:02,166 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:02,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:02,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1920546761, now seen corresponding path program 38 times [2018-09-30 20:11:02,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:02,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:02,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:02,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:02,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 248 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:02,966 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:02,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:02,974 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:11:03,019 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:11:03,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:03,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:03,043 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 248 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:03,068 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:03,068 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 20:11:03,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:11:03,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:11:03,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:11:03,069 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 23 states. [2018-09-30 20:11:03,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:03,187 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2018-09-30 20:11:03,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:11:03,188 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 103 [2018-09-30 20:11:03,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:03,189 INFO L225 Difference]: With dead ends: 120 [2018-09-30 20:11:03,189 INFO L226 Difference]: Without dead ends: 114 [2018-09-30 20:11:03,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 20:11:03,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-30 20:11:03,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2018-09-30 20:11:03,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 20:11:03,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-09-30 20:11:03,201 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 103 [2018-09-30 20:11:03,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:03,202 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-09-30 20:11:03,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:11:03,202 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-09-30 20:11:03,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 20:11:03,202 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:03,203 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 1, 1, 1, 1, 1] [2018-09-30 20:11:03,203 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:03,203 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:03,203 INFO L82 PathProgramCache]: Analyzing trace with hash -756867393, now seen corresponding path program 39 times [2018-09-30 20:11:03,203 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:03,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:03,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:03,204 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:03,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 840 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:04,648 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:04,648 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:04,670 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:11:04,770 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 20:11:04,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:04,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 840 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:04,828 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:04,828 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 20:11:04,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:11:04,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:11:04,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:11:04,830 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 44 states. [2018-09-30 20:11:06,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:06,754 INFO L93 Difference]: Finished difference Result 202 states and 206 transitions. [2018-09-30 20:11:06,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:11:06,755 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 107 [2018-09-30 20:11:06,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:06,755 INFO L225 Difference]: With dead ends: 202 [2018-09-30 20:11:06,755 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 20:11:06,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1009, Invalid=3151, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 20:11:06,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 20:11:06,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 20:11:06,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 20:11:06,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2018-09-30 20:11:06,766 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 107 [2018-09-30 20:11:06,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:06,766 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2018-09-30 20:11:06,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:11:06,766 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2018-09-30 20:11:06,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 20:11:06,766 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:06,767 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 1, 1, 1, 1, 1] [2018-09-30 20:11:06,767 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:06,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:06,767 INFO L82 PathProgramCache]: Analyzing trace with hash 798222758, now seen corresponding path program 40 times [2018-09-30 20:11:06,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:06,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:06,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:06,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:06,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 271 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:07,105 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:07,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:07,113 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:11:07,168 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:11:07,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:07,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 271 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:07,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:07,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 20:11:07,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:11:07,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:11:07,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:11:07,213 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 24 states. [2018-09-30 20:11:07,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:07,333 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2018-09-30 20:11:07,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:11:07,333 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 108 [2018-09-30 20:11:07,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:07,334 INFO L225 Difference]: With dead ends: 125 [2018-09-30 20:11:07,334 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 20:11:07,335 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 20:11:07,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 20:11:07,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-09-30 20:11:07,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 20:11:07,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-09-30 20:11:07,347 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 108 [2018-09-30 20:11:07,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:07,348 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-09-30 20:11:07,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:11:07,348 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-09-30 20:11:07,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 20:11:07,348 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:07,349 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 1, 1, 1, 1, 1] [2018-09-30 20:11:07,349 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:07,349 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:07,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1030199836, now seen corresponding path program 41 times [2018-09-30 20:11:07,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:07,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:07,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:07,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:07,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 924 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:08,182 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:08,182 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:08,189 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:11:08,257 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 20:11:08,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:08,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 924 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:08,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:08,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 20:11:08,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:11:08,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:11:08,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:11:08,301 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 46 states. [2018-09-30 20:11:09,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:09,583 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2018-09-30 20:11:09,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:11:09,584 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 112 [2018-09-30 20:11:09,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:09,585 INFO L225 Difference]: With dead ends: 211 [2018-09-30 20:11:09,585 INFO L226 Difference]: Without dead ends: 116 [2018-09-30 20:11:09,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1101, Invalid=3455, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 20:11:09,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-30 20:11:09,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-30 20:11:09,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-30 20:11:09,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2018-09-30 20:11:09,600 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 112 [2018-09-30 20:11:09,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:09,600 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2018-09-30 20:11:09,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:11:09,600 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2018-09-30 20:11:09,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-30 20:11:09,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:09,601 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 1, 1, 1, 1, 1] [2018-09-30 20:11:09,601 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:09,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:09,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1949005931, now seen corresponding path program 42 times [2018-09-30 20:11:09,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:09,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:09,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:09,602 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:09,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 295 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:11,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:11,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:11,024 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:11:11,123 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 20:11:11,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:11,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 295 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:11,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:11,164 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 20:11:11,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 20:11:11,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 20:11:11,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:11:11,165 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 25 states. [2018-09-30 20:11:11,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:11,416 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2018-09-30 20:11:11,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:11:11,417 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 113 [2018-09-30 20:11:11,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:11,418 INFO L225 Difference]: With dead ends: 130 [2018-09-30 20:11:11,418 INFO L226 Difference]: Without dead ends: 124 [2018-09-30 20:11:11,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 20:11:11,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-30 20:11:11,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2018-09-30 20:11:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-30 20:11:11,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2018-09-30 20:11:11,431 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 113 [2018-09-30 20:11:11,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:11,431 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2018-09-30 20:11:11,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 20:11:11,432 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2018-09-30 20:11:11,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-30 20:11:11,432 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:11,432 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1] [2018-09-30 20:11:11,432 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:11,432 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:11,433 INFO L82 PathProgramCache]: Analyzing trace with hash 725198987, now seen corresponding path program 43 times [2018-09-30 20:11:11,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:11,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:11,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:11,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:11,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:12,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 1012 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:12,271 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:12,271 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:12,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:12,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 1012 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:12,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:12,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 20:11:12,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:11:12,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:11:12,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 20:11:12,397 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 48 states. [2018-09-30 20:11:13,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:13,535 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2018-09-30 20:11:13,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:11:13,536 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 117 [2018-09-30 20:11:13,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:13,536 INFO L225 Difference]: With dead ends: 220 [2018-09-30 20:11:13,536 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 20:11:13,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1197, Invalid=3773, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 20:11:13,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 20:11:13,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 20:11:13,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 20:11:13,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-09-30 20:11:13,549 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 117 [2018-09-30 20:11:13,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:13,549 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-09-30 20:11:13,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:11:13,549 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-09-30 20:11:13,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 20:11:13,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:13,550 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2018-09-30 20:11:13,550 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:13,551 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:13,551 INFO L82 PathProgramCache]: Analyzing trace with hash 995311282, now seen corresponding path program 44 times [2018-09-30 20:11:13,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:13,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:13,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:13,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:13,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:13,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 320 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:13,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:13,930 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:13,940 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:11:13,993 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:11:13,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:13,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 320 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:14,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:14,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 20:11:14,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:11:14,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:11:14,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:11:14,047 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 26 states. [2018-09-30 20:11:14,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:14,206 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2018-09-30 20:11:14,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:11:14,207 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2018-09-30 20:11:14,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:14,207 INFO L225 Difference]: With dead ends: 135 [2018-09-30 20:11:14,208 INFO L226 Difference]: Without dead ends: 129 [2018-09-30 20:11:14,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 20:11:14,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-30 20:11:14,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2018-09-30 20:11:14,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 20:11:14,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2018-09-30 20:11:14,222 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 118 [2018-09-30 20:11:14,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:14,223 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2018-09-30 20:11:14,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:11:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2018-09-30 20:11:14,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 20:11:14,223 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:14,224 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 1, 1, 1, 1, 1] [2018-09-30 20:11:14,224 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:14,224 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:14,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1935656, now seen corresponding path program 45 times [2018-09-30 20:11:14,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:14,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:14,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:14,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:14,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 1104 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:15,436 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:15,436 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:15,445 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:11:15,519 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 20:11:15,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:15,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 1104 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:15,582 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:15,583 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 20:11:15,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:11:15,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:11:15,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:11:15,584 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 50 states. [2018-09-30 20:11:16,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:16,985 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2018-09-30 20:11:16,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:11:16,985 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 122 [2018-09-30 20:11:16,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:16,986 INFO L225 Difference]: With dead ends: 229 [2018-09-30 20:11:16,986 INFO L226 Difference]: Without dead ends: 126 [2018-09-30 20:11:16,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1297, Invalid=4105, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 20:11:16,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-30 20:11:17,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-30 20:11:17,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-30 20:11:17,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2018-09-30 20:11:17,018 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 122 [2018-09-30 20:11:17,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:17,018 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2018-09-30 20:11:17,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:11:17,018 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2018-09-30 20:11:17,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-30 20:11:17,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:17,019 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 1, 1, 1, 1, 1] [2018-09-30 20:11:17,019 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:17,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:17,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1360966497, now seen corresponding path program 46 times [2018-09-30 20:11:17,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:17,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:17,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:17,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:17,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 346 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:17,455 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:17,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:17,464 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:11:17,521 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:11:17,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:17,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 346 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:17,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:17,573 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 20:11:17,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 20:11:17,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 20:11:17,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:11:17,573 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 27 states. [2018-09-30 20:11:17,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:17,705 INFO L93 Difference]: Finished difference Result 140 states and 143 transitions. [2018-09-30 20:11:17,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:11:17,705 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 123 [2018-09-30 20:11:17,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:17,706 INFO L225 Difference]: With dead ends: 140 [2018-09-30 20:11:17,706 INFO L226 Difference]: Without dead ends: 134 [2018-09-30 20:11:17,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 20:11:17,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-30 20:11:17,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2018-09-30 20:11:17,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-30 20:11:17,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-09-30 20:11:17,719 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 123 [2018-09-30 20:11:17,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:17,719 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-09-30 20:11:17,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 20:11:17,719 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-09-30 20:11:17,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-30 20:11:17,720 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:17,720 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 1, 1, 1, 1, 1] [2018-09-30 20:11:17,720 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:17,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:17,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1531900329, now seen corresponding path program 47 times [2018-09-30 20:11:17,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:17,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:17,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:17,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:17,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 1200 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:18,958 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:18,958 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:18,965 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:11:19,044 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 20:11:19,045 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:19,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:19,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 1200 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:19,093 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:19,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 20:11:19,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 20:11:19,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 20:11:19,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=1951, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 20:11:19,094 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 52 states. [2018-09-30 20:11:20,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:20,637 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2018-09-30 20:11:20,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 20:11:20,637 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 127 [2018-09-30 20:11:20,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:20,638 INFO L225 Difference]: With dead ends: 238 [2018-09-30 20:11:20,638 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 20:11:20,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1401, Invalid=4451, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 20:11:20,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 20:11:20,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 20:11:20,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 20:11:20,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-09-30 20:11:20,649 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 127 [2018-09-30 20:11:20,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:20,649 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-09-30 20:11:20,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 20:11:20,649 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-09-30 20:11:20,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 20:11:20,650 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:20,650 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 1, 1, 1, 1, 1] [2018-09-30 20:11:20,651 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:20,651 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:20,651 INFO L82 PathProgramCache]: Analyzing trace with hash -652320834, now seen corresponding path program 48 times [2018-09-30 20:11:20,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:20,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:20,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:20,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:20,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 373 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:22,682 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:22,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:22,690 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:11:22,773 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 20:11:22,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:22,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 373 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:22,818 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:22,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 20:11:22,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:11:22,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:11:22,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:11:22,819 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 28 states. [2018-09-30 20:11:22,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:22,956 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2018-09-30 20:11:22,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:11:22,957 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 128 [2018-09-30 20:11:22,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:22,958 INFO L225 Difference]: With dead ends: 145 [2018-09-30 20:11:22,958 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 20:11:22,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 20:11:22,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 20:11:22,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-09-30 20:11:22,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 20:11:22,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2018-09-30 20:11:22,973 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 128 [2018-09-30 20:11:22,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:22,973 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2018-09-30 20:11:22,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:11:22,973 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2018-09-30 20:11:22,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 20:11:22,974 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:22,974 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 1, 1, 1, 1, 1] [2018-09-30 20:11:22,974 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:22,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:22,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1843837900, now seen corresponding path program 49 times [2018-09-30 20:11:22,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:22,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:22,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:22,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:22,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1300 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:24,134 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:24,134 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:24,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:24,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1300 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:24,260 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:24,261 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 20:11:24,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 20:11:24,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 20:11:24,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:11:24,262 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 54 states. [2018-09-30 20:11:25,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:25,931 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2018-09-30 20:11:25,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 20:11:25,932 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 132 [2018-09-30 20:11:25,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:25,933 INFO L225 Difference]: With dead ends: 247 [2018-09-30 20:11:25,933 INFO L226 Difference]: Without dead ends: 136 [2018-09-30 20:11:25,934 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1509, Invalid=4811, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 20:11:25,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-30 20:11:25,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-30 20:11:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-30 20:11:25,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-09-30 20:11:25,944 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 132 [2018-09-30 20:11:25,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:25,944 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-09-30 20:11:25,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 20:11:25,944 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-09-30 20:11:25,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-30 20:11:25,945 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:25,945 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 1, 1, 1, 1, 1] [2018-09-30 20:11:25,945 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:25,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:25,945 INFO L82 PathProgramCache]: Analyzing trace with hash 35240749, now seen corresponding path program 50 times [2018-09-30 20:11:25,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:25,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:25,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:25,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:25,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:25,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:26,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 401 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:26,321 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:26,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:26,331 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:11:26,391 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:11:26,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:26,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 401 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:26,454 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:26,454 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 20:11:26,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:11:26,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:11:26,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:11:26,455 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 29 states. [2018-09-30 20:11:26,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:26,792 INFO L93 Difference]: Finished difference Result 150 states and 153 transitions. [2018-09-30 20:11:26,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:11:26,792 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 133 [2018-09-30 20:11:26,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:26,793 INFO L225 Difference]: With dead ends: 150 [2018-09-30 20:11:26,794 INFO L226 Difference]: Without dead ends: 144 [2018-09-30 20:11:26,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 20:11:26,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-09-30 20:11:26,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2018-09-30 20:11:26,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-30 20:11:26,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2018-09-30 20:11:26,810 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 133 [2018-09-30 20:11:26,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:26,810 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2018-09-30 20:11:26,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:11:26,810 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2018-09-30 20:11:26,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-30 20:11:26,811 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:26,811 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 1, 1, 1, 1, 1] [2018-09-30 20:11:26,811 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:26,812 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:26,812 INFO L82 PathProgramCache]: Analyzing trace with hash -838119389, now seen corresponding path program 51 times [2018-09-30 20:11:26,812 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:26,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:26,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:26,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:26,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 1404 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:27,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:27,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:27,736 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:11:27,827 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 20:11:27,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:27,831 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 1404 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:27,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:27,876 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 20:11:27,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 20:11:27,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 20:11:27,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=2269, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 20:11:27,877 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 56 states. [2018-09-30 20:11:29,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:29,273 INFO L93 Difference]: Finished difference Result 256 states and 260 transitions. [2018-09-30 20:11:29,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 20:11:29,274 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 137 [2018-09-30 20:11:29,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:29,274 INFO L225 Difference]: With dead ends: 256 [2018-09-30 20:11:29,275 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 20:11:29,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 20:11:29,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 20:11:29,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 20:11:29,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 20:11:29,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2018-09-30 20:11:29,291 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 137 [2018-09-30 20:11:29,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:29,291 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2018-09-30 20:11:29,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 20:11:29,291 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2018-09-30 20:11:29,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 20:11:29,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:29,292 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 1, 1, 1, 1, 1] [2018-09-30 20:11:29,292 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:29,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:29,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1657490634, now seen corresponding path program 52 times [2018-09-30 20:11:29,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:29,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:29,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:29,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:29,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:29,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 430 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:29,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:29,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:29,949 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:11:30,006 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:11:30,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:30,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 430 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:30,060 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:30,060 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 20:11:30,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:11:30,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:11:30,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:11:30,061 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 30 states. [2018-09-30 20:11:30,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:30,213 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2018-09-30 20:11:30,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:11:30,213 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 138 [2018-09-30 20:11:30,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:30,214 INFO L225 Difference]: With dead ends: 155 [2018-09-30 20:11:30,214 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 20:11:30,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 20:11:30,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 20:11:30,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2018-09-30 20:11:30,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 20:11:30,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-09-30 20:11:30,225 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 138 [2018-09-30 20:11:30,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:30,226 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-09-30 20:11:30,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:11:30,226 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-09-30 20:11:30,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 20:11:30,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:30,227 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 1, 1, 1, 1, 1] [2018-09-30 20:11:30,227 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:30,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:30,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1915800384, now seen corresponding path program 53 times [2018-09-30 20:11:30,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:30,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:30,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:30,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:30,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1512 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:31,393 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:31,393 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:31,401 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:11:31,486 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 20:11:31,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:31,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1512 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:31,549 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:31,550 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 20:11:31,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 20:11:31,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 20:11:31,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 20:11:31,551 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 58 states. [2018-09-30 20:11:33,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:33,198 INFO L93 Difference]: Finished difference Result 265 states and 269 transitions. [2018-09-30 20:11:33,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 20:11:33,198 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 142 [2018-09-30 20:11:33,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:33,199 INFO L225 Difference]: With dead ends: 265 [2018-09-30 20:11:33,199 INFO L226 Difference]: Without dead ends: 146 [2018-09-30 20:11:33,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1737, Invalid=5573, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 20:11:33,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-09-30 20:11:33,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-09-30 20:11:33,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-09-30 20:11:33,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2018-09-30 20:11:33,211 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 142 [2018-09-30 20:11:33,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:33,211 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2018-09-30 20:11:33,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 20:11:33,211 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2018-09-30 20:11:33,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-09-30 20:11:33,212 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:33,212 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 1, 1, 1, 1, 1] [2018-09-30 20:11:33,212 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:33,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:33,213 INFO L82 PathProgramCache]: Analyzing trace with hash 520593145, now seen corresponding path program 54 times [2018-09-30 20:11:33,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:33,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:33,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:33,214 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:33,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 460 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:33,670 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:33,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:33,679 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:11:33,768 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 20:11:33,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:33,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 460 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:33,840 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:33,840 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 20:11:33,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 20:11:33,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 20:11:33,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:11:33,843 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 31 states. [2018-09-30 20:11:34,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:34,817 INFO L93 Difference]: Finished difference Result 160 states and 163 transitions. [2018-09-30 20:11:34,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:11:34,817 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 143 [2018-09-30 20:11:34,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:34,818 INFO L225 Difference]: With dead ends: 160 [2018-09-30 20:11:34,818 INFO L226 Difference]: Without dead ends: 154 [2018-09-30 20:11:34,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 20:11:34,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-09-30 20:11:34,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2018-09-30 20:11:34,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-09-30 20:11:34,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2018-09-30 20:11:34,830 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 143 [2018-09-30 20:11:34,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:34,831 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2018-09-30 20:11:34,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 20:11:34,831 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2018-09-30 20:11:34,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-30 20:11:34,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:34,832 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 1, 1, 1, 1, 1] [2018-09-30 20:11:34,832 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:34,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:34,833 INFO L82 PathProgramCache]: Analyzing trace with hash 915041775, now seen corresponding path program 55 times [2018-09-30 20:11:34,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:34,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:34,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:34,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:34,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1624 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:35,836 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:35,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:35,843 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:35,919 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1624 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:35,988 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:35,988 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 20:11:35,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 20:11:35,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 20:11:35,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 20:11:35,990 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 60 states. [2018-09-30 20:11:37,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:37,950 INFO L93 Difference]: Finished difference Result 274 states and 278 transitions. [2018-09-30 20:11:37,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 20:11:37,950 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 147 [2018-09-30 20:11:37,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:37,951 INFO L225 Difference]: With dead ends: 274 [2018-09-30 20:11:37,951 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 20:11:37,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1857, Invalid=5975, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 20:11:37,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 20:11:37,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 20:11:37,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 20:11:37,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-09-30 20:11:37,967 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 147 [2018-09-30 20:11:37,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:37,967 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-09-30 20:11:37,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 20:11:37,967 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-09-30 20:11:37,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 20:11:37,968 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:37,968 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 1, 1, 1, 1, 1] [2018-09-30 20:11:37,968 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:37,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:37,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1773143510, now seen corresponding path program 56 times [2018-09-30 20:11:37,969 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:37,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:37,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:37,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:37,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 491 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:38,407 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:38,407 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:38,415 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:11:38,483 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:11:38,483 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:38,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 491 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:38,531 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:38,531 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 20:11:38,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:11:38,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:11:38,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:11:38,532 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 32 states. [2018-09-30 20:11:38,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:38,696 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2018-09-30 20:11:38,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:11:38,696 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 148 [2018-09-30 20:11:38,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:38,697 INFO L225 Difference]: With dead ends: 165 [2018-09-30 20:11:38,697 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 20:11:38,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 20:11:38,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 20:11:38,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-09-30 20:11:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 20:11:38,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-09-30 20:11:38,710 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 148 [2018-09-30 20:11:38,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:38,710 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-09-30 20:11:38,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:11:38,710 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-09-30 20:11:38,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 20:11:38,710 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:38,711 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 1, 1, 1, 1, 1] [2018-09-30 20:11:38,711 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:38,711 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:38,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1766187444, now seen corresponding path program 57 times [2018-09-30 20:11:38,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:38,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:38,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:38,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:38,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:40,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 1740 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:40,171 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:40,171 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:40,178 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:11:40,273 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 20:11:40,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:40,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 1740 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:40,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:40,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 20:11:40,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 20:11:40,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 20:11:40,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 20:11:40,342 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 62 states. [2018-09-30 20:11:41,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:41,338 INFO L93 Difference]: Finished difference Result 283 states and 287 transitions. [2018-09-30 20:11:41,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 20:11:41,338 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 152 [2018-09-30 20:11:41,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:41,339 INFO L225 Difference]: With dead ends: 283 [2018-09-30 20:11:41,339 INFO L226 Difference]: Without dead ends: 156 [2018-09-30 20:11:41,340 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1981, Invalid=6391, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 20:11:41,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-09-30 20:11:41,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-09-30 20:11:41,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-09-30 20:11:41,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2018-09-30 20:11:41,352 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 152 [2018-09-30 20:11:41,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:41,352 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2018-09-30 20:11:41,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 20:11:41,352 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2018-09-30 20:11:41,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-09-30 20:11:41,353 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:41,353 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 1, 1, 1, 1, 1] [2018-09-30 20:11:41,353 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:41,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:41,353 INFO L82 PathProgramCache]: Analyzing trace with hash -928358715, now seen corresponding path program 58 times [2018-09-30 20:11:41,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:41,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:41,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:41,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:41,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 523 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:41,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:41,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:41,810 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:11:41,879 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:11:41,879 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:41,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 523 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:41,942 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:41,943 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 20:11:41,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 20:11:41,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 20:11:41,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 20:11:41,944 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand 33 states. [2018-09-30 20:11:42,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:42,173 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2018-09-30 20:11:42,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:11:42,173 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 153 [2018-09-30 20:11:42,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:42,174 INFO L225 Difference]: With dead ends: 170 [2018-09-30 20:11:42,174 INFO L226 Difference]: Without dead ends: 164 [2018-09-30 20:11:42,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 20:11:42,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-09-30 20:11:42,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2018-09-30 20:11:42,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-30 20:11:42,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-09-30 20:11:42,193 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 153 [2018-09-30 20:11:42,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:42,193 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-09-30 20:11:42,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 20:11:42,194 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-09-30 20:11:42,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-09-30 20:11:42,194 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:42,194 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 1, 1, 1, 1, 1] [2018-09-30 20:11:42,195 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:42,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:42,195 INFO L82 PathProgramCache]: Analyzing trace with hash -839882821, now seen corresponding path program 59 times [2018-09-30 20:11:42,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:42,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:42,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:42,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:42,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:42,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 1860 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:43,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:43,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:43,355 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:11:43,448 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 20:11:43,448 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:43,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 1860 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:43,516 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:43,517 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 20:11:43,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 20:11:43,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 20:11:43,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 20:11:43,518 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 64 states. [2018-09-30 20:11:45,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:45,807 INFO L93 Difference]: Finished difference Result 292 states and 296 transitions. [2018-09-30 20:11:45,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 20:11:45,808 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 157 [2018-09-30 20:11:45,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:45,809 INFO L225 Difference]: With dead ends: 292 [2018-09-30 20:11:45,809 INFO L226 Difference]: Without dead ends: 161 [2018-09-30 20:11:45,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2109, Invalid=6821, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 20:11:45,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-30 20:11:45,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-30 20:11:45,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 20:11:45,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-09-30 20:11:45,828 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 157 [2018-09-30 20:11:45,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:45,828 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-09-30 20:11:45,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 20:11:45,828 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-09-30 20:11:45,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 20:11:45,829 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:45,829 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 1, 1, 1, 1, 1] [2018-09-30 20:11:45,829 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:45,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:45,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1453492962, now seen corresponding path program 60 times [2018-09-30 20:11:45,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:45,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:45,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:45,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:45,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 556 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:46,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:46,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:46,386 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:11:46,535 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 20:11:46,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:46,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 556 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:46,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:46,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 20:11:46,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:11:46,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:11:46,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:11:46,586 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 34 states. [2018-09-30 20:11:46,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:46,758 INFO L93 Difference]: Finished difference Result 175 states and 178 transitions. [2018-09-30 20:11:46,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:11:46,759 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 158 [2018-09-30 20:11:46,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:46,759 INFO L225 Difference]: With dead ends: 175 [2018-09-30 20:11:46,760 INFO L226 Difference]: Without dead ends: 169 [2018-09-30 20:11:46,760 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 20:11:46,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-30 20:11:46,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2018-09-30 20:11:46,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-30 20:11:46,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2018-09-30 20:11:46,778 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 158 [2018-09-30 20:11:46,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:46,778 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2018-09-30 20:11:46,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:11:46,778 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2018-09-30 20:11:46,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 20:11:46,779 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:46,779 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 1, 1, 1, 1, 1] [2018-09-30 20:11:46,779 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:46,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:46,780 INFO L82 PathProgramCache]: Analyzing trace with hash 227229016, now seen corresponding path program 61 times [2018-09-30 20:11:46,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:46,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:46,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:46,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:46,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 1984 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:48,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:48,051 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:48,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:48,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 1984 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:48,193 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:48,193 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 20:11:48,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 20:11:48,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 20:11:48,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 20:11:48,194 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 66 states. [2018-09-30 20:11:50,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:50,270 INFO L93 Difference]: Finished difference Result 301 states and 305 transitions. [2018-09-30 20:11:50,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 20:11:50,271 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 162 [2018-09-30 20:11:50,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:50,271 INFO L225 Difference]: With dead ends: 301 [2018-09-30 20:11:50,271 INFO L226 Difference]: Without dead ends: 166 [2018-09-30 20:11:50,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2241, Invalid=7265, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 20:11:50,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-09-30 20:11:50,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-09-30 20:11:50,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-09-30 20:11:50,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2018-09-30 20:11:50,290 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 162 [2018-09-30 20:11:50,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:50,291 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2018-09-30 20:11:50,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 20:11:50,291 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2018-09-30 20:11:50,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-09-30 20:11:50,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:50,292 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 1, 1, 1, 1, 1] [2018-09-30 20:11:50,292 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:50,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:50,292 INFO L82 PathProgramCache]: Analyzing trace with hash 541325969, now seen corresponding path program 62 times [2018-09-30 20:11:50,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:50,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:50,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:50,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:11:50,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:50,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 590 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:50,854 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:50,854 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:50,862 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:11:50,932 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:11:50,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:50,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 590 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:50,984 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:50,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 20:11:50,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 20:11:50,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 20:11:50,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 20:11:50,985 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 35 states. [2018-09-30 20:11:51,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:51,162 INFO L93 Difference]: Finished difference Result 180 states and 183 transitions. [2018-09-30 20:11:51,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:11:51,162 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 163 [2018-09-30 20:11:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:51,163 INFO L225 Difference]: With dead ends: 180 [2018-09-30 20:11:51,164 INFO L226 Difference]: Without dead ends: 174 [2018-09-30 20:11:51,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 20:11:51,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-09-30 20:11:51,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2018-09-30 20:11:51,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-09-30 20:11:51,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2018-09-30 20:11:51,180 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 163 [2018-09-30 20:11:51,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:51,180 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2018-09-30 20:11:51,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 20:11:51,181 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2018-09-30 20:11:51,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-09-30 20:11:51,181 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:51,182 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 1, 1, 1, 1, 1] [2018-09-30 20:11:51,182 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:51,182 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:51,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1149189511, now seen corresponding path program 63 times [2018-09-30 20:11:51,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:51,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:51,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:51,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:51,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 2112 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:52,473 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:52,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:52,481 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:11:52,618 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-30 20:11:52,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:52,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 2112 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:52,681 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:52,681 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 20:11:52,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 20:11:52,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 20:11:52,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=3367, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 20:11:52,683 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand 68 states. [2018-09-30 20:11:54,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:54,909 INFO L93 Difference]: Finished difference Result 310 states and 314 transitions. [2018-09-30 20:11:54,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 20:11:54,909 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 167 [2018-09-30 20:11:54,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:54,910 INFO L225 Difference]: With dead ends: 310 [2018-09-30 20:11:54,910 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 20:11:54,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2377, Invalid=7723, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 20:11:54,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 20:11:54,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-30 20:11:54,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 20:11:54,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-09-30 20:11:54,925 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 167 [2018-09-30 20:11:54,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:54,925 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-09-30 20:11:54,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 20:11:54,925 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-09-30 20:11:54,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-30 20:11:54,925 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:54,926 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 1, 1, 1, 1, 1] [2018-09-30 20:11:54,926 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:54,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:54,926 INFO L82 PathProgramCache]: Analyzing trace with hash 167304174, now seen corresponding path program 64 times [2018-09-30 20:11:54,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:54,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:54,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:54,927 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:54,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:54,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 625 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:55,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:55,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:55,733 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:11:55,809 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:11:55,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:55,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 625 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:55,873 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:55,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 20:11:55,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:11:55,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:11:55,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:11:55,874 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 36 states. [2018-09-30 20:11:56,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:11:56,093 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2018-09-30 20:11:56,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:11:56,093 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 168 [2018-09-30 20:11:56,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:11:56,095 INFO L225 Difference]: With dead ends: 185 [2018-09-30 20:11:56,095 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 20:11:56,095 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 20:11:56,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 20:11:56,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-09-30 20:11:56,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 20:11:56,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-09-30 20:11:56,115 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 168 [2018-09-30 20:11:56,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:11:56,116 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-09-30 20:11:56,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:11:56,116 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-09-30 20:11:56,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-30 20:11:56,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:11:56,117 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 1, 1, 1, 1, 1] [2018-09-30 20:11:56,117 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:11:56,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:11:56,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1678104476, now seen corresponding path program 65 times [2018-09-30 20:11:56,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:11:56,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:11:56,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:56,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:11:56,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:11:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:11:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 2244 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:57,499 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:11:57,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:11:57,506 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:11:57,610 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 20:11:57,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:11:57,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:11:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 2244 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:11:57,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:11:57,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 20:11:57,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 20:11:57,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 20:11:57,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 20:11:57,687 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 70 states. [2018-09-30 20:12:00,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:00,435 INFO L93 Difference]: Finished difference Result 319 states and 323 transitions. [2018-09-30 20:12:00,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 20:12:00,435 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 172 [2018-09-30 20:12:00,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:00,436 INFO L225 Difference]: With dead ends: 319 [2018-09-30 20:12:00,436 INFO L226 Difference]: Without dead ends: 176 [2018-09-30 20:12:00,437 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2517, Invalid=8195, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 20:12:00,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-09-30 20:12:00,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-09-30 20:12:00,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-09-30 20:12:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-09-30 20:12:00,457 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 172 [2018-09-30 20:12:00,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:00,457 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-09-30 20:12:00,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 20:12:00,457 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-09-30 20:12:00,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-09-30 20:12:00,458 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:00,458 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 1, 1, 1, 1, 1] [2018-09-30 20:12:00,458 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:00,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:00,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1483312547, now seen corresponding path program 66 times [2018-09-30 20:12:00,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:00,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:00,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:00,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:00,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 661 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:00,997 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:00,997 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:01,004 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:12:01,117 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 20:12:01,117 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:01,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 661 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:01,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:01,172 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 20:12:01,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 20:12:01,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 20:12:01,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:12:01,173 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 37 states. [2018-09-30 20:12:01,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:01,366 INFO L93 Difference]: Finished difference Result 190 states and 193 transitions. [2018-09-30 20:12:01,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:12:01,366 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 173 [2018-09-30 20:12:01,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:01,367 INFO L225 Difference]: With dead ends: 190 [2018-09-30 20:12:01,368 INFO L226 Difference]: Without dead ends: 184 [2018-09-30 20:12:01,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 20:12:01,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-09-30 20:12:01,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2018-09-30 20:12:01,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-09-30 20:12:01,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 182 transitions. [2018-09-30 20:12:01,385 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 182 transitions. Word has length 173 [2018-09-30 20:12:01,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:01,385 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 182 transitions. [2018-09-30 20:12:01,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 20:12:01,385 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 182 transitions. [2018-09-30 20:12:01,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-09-30 20:12:01,386 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:01,386 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 1, 1, 1, 1, 1] [2018-09-30 20:12:01,387 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:01,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:01,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1794699091, now seen corresponding path program 67 times [2018-09-30 20:12:01,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:01,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:01,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:01,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:01,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:01,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 2380 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:02,798 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:02,798 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:02,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:02,890 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:02,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 2380 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:02,942 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:02,942 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 20:12:02,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 20:12:02,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 20:12:02,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=3781, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 20:12:02,944 INFO L87 Difference]: Start difference. First operand 180 states and 182 transitions. Second operand 72 states. [2018-09-30 20:12:05,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:05,680 INFO L93 Difference]: Finished difference Result 328 states and 332 transitions. [2018-09-30 20:12:05,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 20:12:05,680 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 177 [2018-09-30 20:12:05,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:05,681 INFO L225 Difference]: With dead ends: 328 [2018-09-30 20:12:05,681 INFO L226 Difference]: Without dead ends: 181 [2018-09-30 20:12:05,681 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2661, Invalid=8681, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 20:12:05,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-30 20:12:05,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-30 20:12:05,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 20:12:05,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-09-30 20:12:05,697 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 177 [2018-09-30 20:12:05,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:05,697 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-09-30 20:12:05,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 20:12:05,697 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-09-30 20:12:05,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-30 20:12:05,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:05,698 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 1, 1, 1, 1, 1] [2018-09-30 20:12:05,698 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:05,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:05,698 INFO L82 PathProgramCache]: Analyzing trace with hash 2072574202, now seen corresponding path program 68 times [2018-09-30 20:12:05,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:05,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:05,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:05,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:05,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:06,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 698 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:06,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:06,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:06,365 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:12:06,446 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:12:06,446 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:06,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 698 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:06,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:06,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 20:12:06,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:12:06,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:12:06,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:12:06,502 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 38 states. [2018-09-30 20:12:06,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:06,702 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2018-09-30 20:12:06,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:12:06,703 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 178 [2018-09-30 20:12:06,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:06,704 INFO L225 Difference]: With dead ends: 195 [2018-09-30 20:12:06,704 INFO L226 Difference]: Without dead ends: 189 [2018-09-30 20:12:06,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 20:12:06,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-30 20:12:06,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2018-09-30 20:12:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 20:12:06,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-09-30 20:12:06,720 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 178 [2018-09-30 20:12:06,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:06,721 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-09-30 20:12:06,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:12:06,721 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-09-30 20:12:06,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 20:12:06,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:06,722 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 1, 1, 1, 1, 1] [2018-09-30 20:12:06,722 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:06,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:06,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1591533424, now seen corresponding path program 69 times [2018-09-30 20:12:06,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:06,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:06,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:06,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:06,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 2520 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:08,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:08,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:08,270 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:12:08,431 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 20:12:08,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:08,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:08,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 2520 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:08,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:08,502 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 20:12:08,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 20:12:08,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 20:12:08,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 20:12:08,503 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 74 states. [2018-09-30 20:12:11,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:11,286 INFO L93 Difference]: Finished difference Result 337 states and 341 transitions. [2018-09-30 20:12:11,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 20:12:11,286 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 182 [2018-09-30 20:12:11,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:11,287 INFO L225 Difference]: With dead ends: 337 [2018-09-30 20:12:11,287 INFO L226 Difference]: Without dead ends: 186 [2018-09-30 20:12:11,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2809, Invalid=9181, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 20:12:11,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-09-30 20:12:11,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-09-30 20:12:11,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-09-30 20:12:11,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2018-09-30 20:12:11,304 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 182 [2018-09-30 20:12:11,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:11,304 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2018-09-30 20:12:11,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 20:12:11,304 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2018-09-30 20:12:11,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-30 20:12:11,305 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:11,305 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 1, 1, 1, 1, 1] [2018-09-30 20:12:11,305 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:11,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:11,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1595685335, now seen corresponding path program 70 times [2018-09-30 20:12:11,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:11,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:11,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:11,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:11,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:11,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 736 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:11,892 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:11,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:11,899 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:12:11,982 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:12:11,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:11,988 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 736 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:12,062 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:12,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 20:12:12,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 20:12:12,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 20:12:12,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 20:12:12,064 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand 39 states. [2018-09-30 20:12:12,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:12,305 INFO L93 Difference]: Finished difference Result 200 states and 203 transitions. [2018-09-30 20:12:12,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:12:12,305 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 183 [2018-09-30 20:12:12,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:12,307 INFO L225 Difference]: With dead ends: 200 [2018-09-30 20:12:12,307 INFO L226 Difference]: Without dead ends: 194 [2018-09-30 20:12:12,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 20:12:12,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-09-30 20:12:12,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 190. [2018-09-30 20:12:12,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-09-30 20:12:12,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2018-09-30 20:12:12,324 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 183 [2018-09-30 20:12:12,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:12,325 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2018-09-30 20:12:12,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 20:12:12,325 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2018-09-30 20:12:12,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-09-30 20:12:12,325 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:12,325 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 1, 1, 1, 1, 1] [2018-09-30 20:12:12,326 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:12,326 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:12,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1835041505, now seen corresponding path program 71 times [2018-09-30 20:12:12,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:12,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:12,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:12,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:12,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 2664 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:14,052 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:14,052 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:14,060 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:12:14,174 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 20:12:14,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:14,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 2664 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:14,249 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:14,249 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 20:12:14,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 20:12:14,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 20:12:14,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1481, Invalid=4219, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 20:12:14,250 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 76 states. [2018-09-30 20:12:17,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:17,216 INFO L93 Difference]: Finished difference Result 346 states and 350 transitions. [2018-09-30 20:12:17,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 20:12:17,216 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 187 [2018-09-30 20:12:17,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:17,217 INFO L225 Difference]: With dead ends: 346 [2018-09-30 20:12:17,217 INFO L226 Difference]: Without dead ends: 191 [2018-09-30 20:12:17,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2961, Invalid=9695, Unknown=0, NotChecked=0, Total=12656 [2018-09-30 20:12:17,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-30 20:12:17,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-30 20:12:17,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-30 20:12:17,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-09-30 20:12:17,241 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 187 [2018-09-30 20:12:17,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:17,241 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-09-30 20:12:17,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 20:12:17,241 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-09-30 20:12:17,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 20:12:17,242 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:17,242 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 1, 1, 1, 1, 1] [2018-09-30 20:12:17,242 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:17,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:17,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1521017350, now seen corresponding path program 72 times [2018-09-30 20:12:17,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:17,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:17,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:17,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:17,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:17,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 775 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:17,901 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:17,901 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:17,909 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:12:18,033 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 20:12:18,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:18,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 775 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:18,095 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:18,095 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 20:12:18,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 20:12:18,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 20:12:18,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 20:12:18,096 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 40 states. [2018-09-30 20:12:18,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:18,307 INFO L93 Difference]: Finished difference Result 205 states and 208 transitions. [2018-09-30 20:12:18,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:12:18,307 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 188 [2018-09-30 20:12:18,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:18,308 INFO L225 Difference]: With dead ends: 205 [2018-09-30 20:12:18,308 INFO L226 Difference]: Without dead ends: 199 [2018-09-30 20:12:18,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 20:12:18,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-30 20:12:18,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2018-09-30 20:12:18,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-30 20:12:18,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2018-09-30 20:12:18,332 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 188 [2018-09-30 20:12:18,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:18,332 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2018-09-30 20:12:18,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 20:12:18,332 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2018-09-30 20:12:18,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-30 20:12:18,333 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:18,333 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 1, 1, 1, 1, 1] [2018-09-30 20:12:18,333 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:18,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:18,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1787388540, now seen corresponding path program 73 times [2018-09-30 20:12:18,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:18,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:18,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:18,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:18,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 2812 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:20,208 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:20,208 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:20,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:20,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 2812 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:20,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:20,368 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 20:12:20,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 20:12:20,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 20:12:20,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 20:12:20,369 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand 78 states. [2018-09-30 20:12:22,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:22,893 INFO L93 Difference]: Finished difference Result 355 states and 359 transitions. [2018-09-30 20:12:22,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 20:12:22,893 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 192 [2018-09-30 20:12:22,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:22,894 INFO L225 Difference]: With dead ends: 355 [2018-09-30 20:12:22,894 INFO L226 Difference]: Without dead ends: 196 [2018-09-30 20:12:22,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3117, Invalid=10223, Unknown=0, NotChecked=0, Total=13340 [2018-09-30 20:12:22,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-09-30 20:12:22,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-09-30 20:12:22,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-30 20:12:22,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2018-09-30 20:12:22,916 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 192 [2018-09-30 20:12:22,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:22,917 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2018-09-30 20:12:22,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 20:12:22,917 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2018-09-30 20:12:22,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-09-30 20:12:22,918 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:22,918 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 1, 1, 1, 1, 1] [2018-09-30 20:12:22,918 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:22,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:22,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1861088757, now seen corresponding path program 74 times [2018-09-30 20:12:22,918 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:22,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:22,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:22,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:22,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 815 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:23,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:23,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:23,610 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:12:23,700 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:12:23,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:23,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 815 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:23,775 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:23,775 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 20:12:23,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:12:23,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:12:23,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 20:12:23,776 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 41 states. [2018-09-30 20:12:23,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:23,991 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2018-09-30 20:12:23,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:12:23,991 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 193 [2018-09-30 20:12:23,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:23,992 INFO L225 Difference]: With dead ends: 210 [2018-09-30 20:12:23,992 INFO L226 Difference]: Without dead ends: 204 [2018-09-30 20:12:23,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 20:12:23,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-09-30 20:12:24,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2018-09-30 20:12:24,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-09-30 20:12:24,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2018-09-30 20:12:24,010 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 193 [2018-09-30 20:12:24,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:24,010 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2018-09-30 20:12:24,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:12:24,010 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2018-09-30 20:12:24,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-09-30 20:12:24,011 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:24,011 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 1, 1, 1, 1, 1] [2018-09-30 20:12:24,011 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:24,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:24,011 INFO L82 PathProgramCache]: Analyzing trace with hash -315300117, now seen corresponding path program 75 times [2018-09-30 20:12:24,012 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:24,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:24,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:24,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:24,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 2964 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:25,798 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:25,798 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:25,804 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:12:25,963 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-30 20:12:25,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:25,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 2964 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:26,031 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:26,031 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 20:12:26,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 20:12:26,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 20:12:26,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1639, Invalid=4681, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 20:12:26,032 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 80 states. [2018-09-30 20:12:29,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:29,101 INFO L93 Difference]: Finished difference Result 364 states and 368 transitions. [2018-09-30 20:12:29,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 20:12:29,101 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 197 [2018-09-30 20:12:29,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:29,103 INFO L225 Difference]: With dead ends: 364 [2018-09-30 20:12:29,103 INFO L226 Difference]: Without dead ends: 201 [2018-09-30 20:12:29,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3277, Invalid=10765, Unknown=0, NotChecked=0, Total=14042 [2018-09-30 20:12:29,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-30 20:12:29,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-30 20:12:29,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-30 20:12:29,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2018-09-30 20:12:29,128 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 197 [2018-09-30 20:12:29,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:29,128 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2018-09-30 20:12:29,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 20:12:29,128 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2018-09-30 20:12:29,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-30 20:12:29,129 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:29,129 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 1, 1, 1, 1, 1] [2018-09-30 20:12:29,129 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:29,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:29,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1372678382, now seen corresponding path program 76 times [2018-09-30 20:12:29,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:29,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:29,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:29,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:29,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 856 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:29,872 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:29,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:29,879 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:12:29,971 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:12:29,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:29,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 856 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:30,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:30,033 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 20:12:30,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:12:30,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:12:30,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:12:30,034 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand 42 states. [2018-09-30 20:12:30,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:30,299 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2018-09-30 20:12:30,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:12:30,307 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 198 [2018-09-30 20:12:30,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:30,308 INFO L225 Difference]: With dead ends: 215 [2018-09-30 20:12:30,308 INFO L226 Difference]: Without dead ends: 209 [2018-09-30 20:12:30,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 20:12:30,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-30 20:12:30,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 205. [2018-09-30 20:12:30,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-30 20:12:30,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-09-30 20:12:30,334 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 198 [2018-09-30 20:12:30,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:30,334 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-09-30 20:12:30,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:12:30,334 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-09-30 20:12:30,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-30 20:12:30,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:30,335 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 1, 1, 1, 1, 1] [2018-09-30 20:12:30,335 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:30,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:30,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1792389512, now seen corresponding path program 77 times [2018-09-30 20:12:30,336 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:30,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:30,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:30,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:30,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3900 backedges. 3120 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:32,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:32,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:32,477 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:12:32,612 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-30 20:12:32,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:32,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3900 backedges. 3120 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:32,675 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:32,676 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 20:12:32,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 20:12:32,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 20:12:32,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 20:12:32,677 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 82 states. [2018-09-30 20:12:35,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:35,174 INFO L93 Difference]: Finished difference Result 373 states and 377 transitions. [2018-09-30 20:12:35,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 20:12:35,174 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 202 [2018-09-30 20:12:35,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:35,175 INFO L225 Difference]: With dead ends: 373 [2018-09-30 20:12:35,175 INFO L226 Difference]: Without dead ends: 206 [2018-09-30 20:12:35,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3441, Invalid=11321, Unknown=0, NotChecked=0, Total=14762 [2018-09-30 20:12:35,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-09-30 20:12:35,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2018-09-30 20:12:35,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-09-30 20:12:35,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 208 transitions. [2018-09-30 20:12:35,202 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 208 transitions. Word has length 202 [2018-09-30 20:12:35,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:35,202 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 208 transitions. [2018-09-30 20:12:35,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 20:12:35,202 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 208 transitions. [2018-09-30 20:12:35,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-09-30 20:12:35,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:35,203 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 39, 1, 1, 1, 1, 1] [2018-09-30 20:12:35,203 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:35,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:35,204 INFO L82 PathProgramCache]: Analyzing trace with hash -185138751, now seen corresponding path program 78 times [2018-09-30 20:12:35,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:35,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:35,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:35,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:35,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 898 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:35,954 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:35,954 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:35,962 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:12:36,108 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-30 20:12:36,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:36,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:36,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 898 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:36,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:36,172 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 20:12:36,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 20:12:36,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 20:12:36,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:12:36,173 INFO L87 Difference]: Start difference. First operand 206 states and 208 transitions. Second operand 43 states. [2018-09-30 20:12:36,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:36,513 INFO L93 Difference]: Finished difference Result 220 states and 223 transitions. [2018-09-30 20:12:36,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:12:36,514 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 203 [2018-09-30 20:12:36,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:36,515 INFO L225 Difference]: With dead ends: 220 [2018-09-30 20:12:36,515 INFO L226 Difference]: Without dead ends: 214 [2018-09-30 20:12:36,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 20:12:36,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-09-30 20:12:36,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2018-09-30 20:12:36,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-09-30 20:12:36,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 212 transitions. [2018-09-30 20:12:36,541 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 212 transitions. Word has length 203 [2018-09-30 20:12:36,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:36,542 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 212 transitions. [2018-09-30 20:12:36,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 20:12:36,542 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 212 transitions. [2018-09-30 20:12:36,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-09-30 20:12:36,543 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:36,543 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 1, 1, 1, 1, 1] [2018-09-30 20:12:36,543 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:36,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:36,543 INFO L82 PathProgramCache]: Analyzing trace with hash -319083337, now seen corresponding path program 79 times [2018-09-30 20:12:36,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:36,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:36,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:36,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:36,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 3280 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:38,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:38,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:38,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:38,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 3280 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:38,618 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:38,618 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 20:12:38,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 20:12:38,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 20:12:38,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1805, Invalid=5167, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 20:12:38,620 INFO L87 Difference]: Start difference. First operand 210 states and 212 transitions. Second operand 84 states. [2018-09-30 20:12:41,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:41,265 INFO L93 Difference]: Finished difference Result 382 states and 386 transitions. [2018-09-30 20:12:41,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 20:12:41,265 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 207 [2018-09-30 20:12:41,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:41,266 INFO L225 Difference]: With dead ends: 382 [2018-09-30 20:12:41,266 INFO L226 Difference]: Without dead ends: 211 [2018-09-30 20:12:41,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3609, Invalid=11891, Unknown=0, NotChecked=0, Total=15500 [2018-09-30 20:12:41,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-30 20:12:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-30 20:12:41,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-30 20:12:41,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-09-30 20:12:41,285 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 207 [2018-09-30 20:12:41,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:41,286 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-09-30 20:12:41,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 20:12:41,286 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-09-30 20:12:41,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-30 20:12:41,286 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:41,286 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 1, 1, 1, 1, 1] [2018-09-30 20:12:41,287 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:41,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:41,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1953503262, now seen corresponding path program 80 times [2018-09-30 20:12:41,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:41,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:41,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:41,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:41,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 941 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:42,183 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:42,183 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:42,190 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:12:42,285 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:12:42,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:42,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 941 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:42,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:42,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 20:12:42,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:12:42,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:12:42,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:12:42,350 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 44 states. [2018-09-30 20:12:42,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:42,618 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2018-09-30 20:12:42,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:12:42,618 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 208 [2018-09-30 20:12:42,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:42,619 INFO L225 Difference]: With dead ends: 225 [2018-09-30 20:12:42,620 INFO L226 Difference]: Without dead ends: 219 [2018-09-30 20:12:42,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 20:12:42,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-30 20:12:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2018-09-30 20:12:42,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-30 20:12:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2018-09-30 20:12:42,640 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 208 [2018-09-30 20:12:42,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:42,640 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2018-09-30 20:12:42,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:12:42,640 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2018-09-30 20:12:42,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-30 20:12:42,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:42,641 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 1, 1, 1, 1, 1] [2018-09-30 20:12:42,641 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:42,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:42,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1125633172, now seen corresponding path program 81 times [2018-09-30 20:12:42,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:42,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:42,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:42,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:42,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:44,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 3444 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:44,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:44,655 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:44,662 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:12:44,820 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-30 20:12:44,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:44,826 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 3444 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:44,913 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:44,914 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 20:12:44,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 20:12:44,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 20:12:44,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 20:12:44,915 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand 86 states. [2018-09-30 20:12:47,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:47,745 INFO L93 Difference]: Finished difference Result 391 states and 395 transitions. [2018-09-30 20:12:47,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 20:12:47,746 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 212 [2018-09-30 20:12:47,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:47,747 INFO L225 Difference]: With dead ends: 391 [2018-09-30 20:12:47,747 INFO L226 Difference]: Without dead ends: 216 [2018-09-30 20:12:47,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3781, Invalid=12475, Unknown=0, NotChecked=0, Total=16256 [2018-09-30 20:12:47,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-09-30 20:12:47,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-09-30 20:12:47,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-09-30 20:12:47,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 218 transitions. [2018-09-30 20:12:47,769 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 218 transitions. Word has length 212 [2018-09-30 20:12:47,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:47,769 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 218 transitions. [2018-09-30 20:12:47,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 20:12:47,769 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 218 transitions. [2018-09-30 20:12:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-09-30 20:12:47,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:47,771 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 1, 1, 1, 1, 1] [2018-09-30 20:12:47,771 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:47,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:47,771 INFO L82 PathProgramCache]: Analyzing trace with hash -155129459, now seen corresponding path program 82 times [2018-09-30 20:12:47,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:47,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:47,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:47,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:47,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 985 proven. 3362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:48,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:48,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:48,629 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:12:48,730 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:12:48,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:48,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 985 proven. 3362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:48,797 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:48,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 20:12:48,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 20:12:48,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 20:12:48,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:12:48,799 INFO L87 Difference]: Start difference. First operand 216 states and 218 transitions. Second operand 45 states. [2018-09-30 20:12:49,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:49,095 INFO L93 Difference]: Finished difference Result 230 states and 233 transitions. [2018-09-30 20:12:49,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:12:49,095 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 213 [2018-09-30 20:12:49,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:49,096 INFO L225 Difference]: With dead ends: 230 [2018-09-30 20:12:49,096 INFO L226 Difference]: Without dead ends: 224 [2018-09-30 20:12:49,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 20:12:49,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-09-30 20:12:49,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2018-09-30 20:12:49,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-09-30 20:12:49,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2018-09-30 20:12:49,117 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 213 [2018-09-30 20:12:49,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:49,118 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2018-09-30 20:12:49,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 20:12:49,118 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2018-09-30 20:12:49,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-09-30 20:12:49,119 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:49,119 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 1, 1, 1, 1, 1] [2018-09-30 20:12:49,119 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:49,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:49,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1531687293, now seen corresponding path program 83 times [2018-09-30 20:12:49,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:49,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:49,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:49,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:49,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:49,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:51,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4515 backedges. 3612 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:51,701 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:51,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:51,709 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:12:51,854 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-30 20:12:51,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:51,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4515 backedges. 3612 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:51,922 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:51,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 20:12:51,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 20:12:51,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 20:12:51,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1979, Invalid=5677, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 20:12:51,923 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand 88 states. [2018-09-30 20:12:54,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:54,631 INFO L93 Difference]: Finished difference Result 400 states and 404 transitions. [2018-09-30 20:12:54,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 20:12:54,631 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 217 [2018-09-30 20:12:54,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:54,632 INFO L225 Difference]: With dead ends: 400 [2018-09-30 20:12:54,632 INFO L226 Difference]: Without dead ends: 221 [2018-09-30 20:12:54,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2667 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3957, Invalid=13073, Unknown=0, NotChecked=0, Total=17030 [2018-09-30 20:12:54,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-30 20:12:54,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-30 20:12:54,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-30 20:12:54,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2018-09-30 20:12:54,654 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 217 [2018-09-30 20:12:54,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:54,654 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2018-09-30 20:12:54,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 20:12:54,654 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2018-09-30 20:12:54,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-30 20:12:54,655 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:54,655 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 1, 1, 1, 1, 1] [2018-09-30 20:12:54,655 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:54,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:54,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1128490282, now seen corresponding path program 84 times [2018-09-30 20:12:54,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:54,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:54,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:54,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:54,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:54,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 1030 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:55,488 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:55,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:55,497 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:12:55,646 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 20:12:55,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:12:55,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:55,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 1030 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:55,714 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:55,714 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 20:12:55,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:12:55,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:12:55,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:12:55,715 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand 46 states. [2018-09-30 20:12:55,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:12:55,968 INFO L93 Difference]: Finished difference Result 235 states and 238 transitions. [2018-09-30 20:12:55,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:12:55,968 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 218 [2018-09-30 20:12:55,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:12:55,969 INFO L225 Difference]: With dead ends: 235 [2018-09-30 20:12:55,969 INFO L226 Difference]: Without dead ends: 229 [2018-09-30 20:12:55,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 20:12:55,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-09-30 20:12:55,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 225. [2018-09-30 20:12:55,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-09-30 20:12:55,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2018-09-30 20:12:55,991 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 218 [2018-09-30 20:12:55,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:12:55,991 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2018-09-30 20:12:55,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:12:55,991 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2018-09-30 20:12:55,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-30 20:12:55,992 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:12:55,992 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 1, 1, 1, 1, 1] [2018-09-30 20:12:55,992 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:12:55,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:12:55,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1373260896, now seen corresponding path program 85 times [2018-09-30 20:12:55,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:12:55,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:12:55,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:55,993 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:12:55,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:12:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4730 backedges. 3784 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:58,567 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:12:58,567 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:12:58,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:12:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:12:58,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:12:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4730 backedges. 3784 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:12:58,748 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:12:58,749 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 20:12:58,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 20:12:58,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 20:12:58,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 20:12:58,750 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand 90 states. [2018-09-30 20:13:01,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:01,561 INFO L93 Difference]: Finished difference Result 409 states and 413 transitions. [2018-09-30 20:13:01,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 20:13:01,562 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 222 [2018-09-30 20:13:01,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:01,563 INFO L225 Difference]: With dead ends: 409 [2018-09-30 20:13:01,563 INFO L226 Difference]: Without dead ends: 226 [2018-09-30 20:13:01,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4137, Invalid=13685, Unknown=0, NotChecked=0, Total=17822 [2018-09-30 20:13:01,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-09-30 20:13:01,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2018-09-30 20:13:01,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-09-30 20:13:01,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 228 transitions. [2018-09-30 20:13:01,586 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 228 transitions. Word has length 222 [2018-09-30 20:13:01,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:01,587 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 228 transitions. [2018-09-30 20:13:01,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 20:13:01,587 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 228 transitions. [2018-09-30 20:13:01,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-09-30 20:13:01,587 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:01,588 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 1, 1, 1, 1, 1] [2018-09-30 20:13:01,588 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:01,588 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:01,588 INFO L82 PathProgramCache]: Analyzing trace with hash 2022550873, now seen corresponding path program 86 times [2018-09-30 20:13:01,588 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:01,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:01,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:01,589 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:01,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:02,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 1076 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:02,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:02,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:02,735 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:13:02,835 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:13:02,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:02,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 1076 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:02,906 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:02,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 20:13:02,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:13:02,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:13:02,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:13:02,908 INFO L87 Difference]: Start difference. First operand 226 states and 228 transitions. Second operand 47 states. [2018-09-30 20:13:03,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:03,193 INFO L93 Difference]: Finished difference Result 240 states and 243 transitions. [2018-09-30 20:13:03,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:13:03,193 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 223 [2018-09-30 20:13:03,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:03,194 INFO L225 Difference]: With dead ends: 240 [2018-09-30 20:13:03,194 INFO L226 Difference]: Without dead ends: 234 [2018-09-30 20:13:03,195 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 20:13:03,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-09-30 20:13:03,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 230. [2018-09-30 20:13:03,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-09-30 20:13:03,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 232 transitions. [2018-09-30 20:13:03,216 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 232 transitions. Word has length 223 [2018-09-30 20:13:03,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:03,217 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 232 transitions. [2018-09-30 20:13:03,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:13:03,217 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 232 transitions. [2018-09-30 20:13:03,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-09-30 20:13:03,217 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:03,218 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 1, 1, 1, 1, 1] [2018-09-30 20:13:03,218 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:03,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:03,218 INFO L82 PathProgramCache]: Analyzing trace with hash 664947791, now seen corresponding path program 87 times [2018-09-30 20:13:03,218 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:03,218 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:03,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:03,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:03,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 3960 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:05,562 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:05,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:05,570 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:13:05,752 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-30 20:13:05,753 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:05,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 3960 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:05,824 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:05,825 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 20:13:05,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 20:13:05,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 20:13:05,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2161, Invalid=6211, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 20:13:05,826 INFO L87 Difference]: Start difference. First operand 230 states and 232 transitions. Second operand 92 states. [2018-09-30 20:13:09,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:09,102 INFO L93 Difference]: Finished difference Result 418 states and 422 transitions. [2018-09-30 20:13:09,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 20:13:09,102 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 227 [2018-09-30 20:13:09,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:09,103 INFO L225 Difference]: With dead ends: 418 [2018-09-30 20:13:09,103 INFO L226 Difference]: Without dead ends: 231 [2018-09-30 20:13:09,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4321, Invalid=14311, Unknown=0, NotChecked=0, Total=18632 [2018-09-30 20:13:09,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-30 20:13:09,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-09-30 20:13:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-30 20:13:09,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2018-09-30 20:13:09,126 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 227 [2018-09-30 20:13:09,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:09,126 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2018-09-30 20:13:09,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 20:13:09,126 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2018-09-30 20:13:09,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-30 20:13:09,127 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:09,127 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 1, 1, 1, 1, 1] [2018-09-30 20:13:09,127 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:09,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:09,127 INFO L82 PathProgramCache]: Analyzing trace with hash -402751946, now seen corresponding path program 88 times [2018-09-30 20:13:09,127 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:09,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:09,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:09,129 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:09,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 1123 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:10,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:10,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:10,037 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:13:10,146 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:13:10,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:10,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:10,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 1123 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:10,219 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:10,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 20:13:10,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:13:10,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:13:10,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 20:13:10,220 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 48 states. [2018-09-30 20:13:10,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:10,554 INFO L93 Difference]: Finished difference Result 245 states and 248 transitions. [2018-09-30 20:13:10,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:13:10,554 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 228 [2018-09-30 20:13:10,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:10,555 INFO L225 Difference]: With dead ends: 245 [2018-09-30 20:13:10,555 INFO L226 Difference]: Without dead ends: 239 [2018-09-30 20:13:10,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 20:13:10,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-09-30 20:13:10,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2018-09-30 20:13:10,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-30 20:13:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2018-09-30 20:13:10,584 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 228 [2018-09-30 20:13:10,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:10,584 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2018-09-30 20:13:10,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:13:10,584 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2018-09-30 20:13:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-09-30 20:13:10,585 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:10,585 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 45, 1, 1, 1, 1, 1] [2018-09-30 20:13:10,585 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:10,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:10,586 INFO L82 PathProgramCache]: Analyzing trace with hash -564828500, now seen corresponding path program 89 times [2018-09-30 20:13:10,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:10,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:10,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:10,586 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:10,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5175 backedges. 4140 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:13,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:13,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:13,510 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:13:13,668 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 20:13:13,669 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:13,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5175 backedges. 4140 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:13,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:13,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 20:13:13,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 20:13:13,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 20:13:13,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 20:13:13,742 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand 94 states. [2018-09-30 20:13:16,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:16,948 INFO L93 Difference]: Finished difference Result 427 states and 431 transitions. [2018-09-30 20:13:16,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 20:13:16,949 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 232 [2018-09-30 20:13:16,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:16,950 INFO L225 Difference]: With dead ends: 427 [2018-09-30 20:13:16,950 INFO L226 Difference]: Without dead ends: 236 [2018-09-30 20:13:16,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4509, Invalid=14951, Unknown=0, NotChecked=0, Total=19460 [2018-09-30 20:13:16,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2018-09-30 20:13:16,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2018-09-30 20:13:16,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-09-30 20:13:16,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 238 transitions. [2018-09-30 20:13:16,979 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 238 transitions. Word has length 232 [2018-09-30 20:13:16,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:16,979 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 238 transitions. [2018-09-30 20:13:16,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 20:13:16,979 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 238 transitions. [2018-09-30 20:13:16,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-09-30 20:13:16,980 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:16,980 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 45, 45, 1, 1, 1, 1, 1] [2018-09-30 20:13:16,980 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:16,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:16,980 INFO L82 PathProgramCache]: Analyzing trace with hash 522145061, now seen corresponding path program 90 times [2018-09-30 20:13:16,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:16,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:16,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:16,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:16,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 1171 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:18,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:18,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:18,589 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:13:18,757 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-30 20:13:18,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:18,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 1171 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:18,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:18,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 20:13:18,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 20:13:18,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 20:13:18,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 20:13:18,832 INFO L87 Difference]: Start difference. First operand 236 states and 238 transitions. Second operand 49 states. [2018-09-30 20:13:19,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:19,190 INFO L93 Difference]: Finished difference Result 250 states and 253 transitions. [2018-09-30 20:13:19,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:13:19,196 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 233 [2018-09-30 20:13:19,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:19,198 INFO L225 Difference]: With dead ends: 250 [2018-09-30 20:13:19,198 INFO L226 Difference]: Without dead ends: 244 [2018-09-30 20:13:19,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 20:13:19,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-09-30 20:13:19,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2018-09-30 20:13:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-09-30 20:13:19,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2018-09-30 20:13:19,224 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 233 [2018-09-30 20:13:19,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:19,225 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2018-09-30 20:13:19,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 20:13:19,225 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2018-09-30 20:13:19,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-09-30 20:13:19,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:19,226 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 1, 1, 1, 1, 1] [2018-09-30 20:13:19,226 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:19,226 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:19,226 INFO L82 PathProgramCache]: Analyzing trace with hash -377018853, now seen corresponding path program 91 times [2018-09-30 20:13:19,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:19,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:19,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:19,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:19,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 4324 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:21,799 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:21,799 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:21,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:21,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 4324 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:21,990 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:21,990 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 20:13:21,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 20:13:21,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 20:13:21,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=6769, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 20:13:21,992 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand 96 states. [2018-09-30 20:13:25,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:25,288 INFO L93 Difference]: Finished difference Result 436 states and 440 transitions. [2018-09-30 20:13:25,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 20:13:25,288 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 237 [2018-09-30 20:13:25,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:25,289 INFO L225 Difference]: With dead ends: 436 [2018-09-30 20:13:25,289 INFO L226 Difference]: Without dead ends: 241 [2018-09-30 20:13:25,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3197 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4701, Invalid=15605, Unknown=0, NotChecked=0, Total=20306 [2018-09-30 20:13:25,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-09-30 20:13:25,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-09-30 20:13:25,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-09-30 20:13:25,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 243 transitions. [2018-09-30 20:13:25,313 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 243 transitions. Word has length 237 [2018-09-30 20:13:25,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:25,314 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 243 transitions. [2018-09-30 20:13:25,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 20:13:25,314 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 243 transitions. [2018-09-30 20:13:25,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-30 20:13:25,314 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:25,315 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1, 1, 1, 1] [2018-09-30 20:13:25,315 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:25,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:25,315 INFO L82 PathProgramCache]: Analyzing trace with hash 125264706, now seen corresponding path program 92 times [2018-09-30 20:13:25,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:25,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:25,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:25,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:25,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 1220 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:26,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:26,272 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:26,280 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:13:26,387 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:13:26,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:26,392 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 1220 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:26,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:26,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 20:13:26,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:13:26,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:13:26,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:13:26,480 INFO L87 Difference]: Start difference. First operand 241 states and 243 transitions. Second operand 50 states. [2018-09-30 20:13:26,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:26,867 INFO L93 Difference]: Finished difference Result 255 states and 258 transitions. [2018-09-30 20:13:26,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:13:26,867 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 238 [2018-09-30 20:13:26,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:26,868 INFO L225 Difference]: With dead ends: 255 [2018-09-30 20:13:26,868 INFO L226 Difference]: Without dead ends: 249 [2018-09-30 20:13:26,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 20:13:26,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-09-30 20:13:26,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 245. [2018-09-30 20:13:26,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-09-30 20:13:26,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2018-09-30 20:13:26,894 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 238 [2018-09-30 20:13:26,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:26,894 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2018-09-30 20:13:26,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:13:26,894 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2018-09-30 20:13:26,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-30 20:13:26,895 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:26,895 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 1, 1, 1, 1, 1] [2018-09-30 20:13:26,896 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:26,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:26,896 INFO L82 PathProgramCache]: Analyzing trace with hash 494724536, now seen corresponding path program 93 times [2018-09-30 20:13:26,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:26,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:26,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:26,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:26,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:29,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5640 backedges. 4512 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:29,773 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:29,773 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:29,782 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:13:29,981 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-30 20:13:29,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:29,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5640 backedges. 4512 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:30,079 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:30,079 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 20:13:30,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 20:13:30,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 20:13:30,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 20:13:30,080 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand 98 states. [2018-09-30 20:13:33,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:33,684 INFO L93 Difference]: Finished difference Result 445 states and 449 transitions. [2018-09-30 20:13:33,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 20:13:33,685 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 242 [2018-09-30 20:13:33,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:33,686 INFO L225 Difference]: With dead ends: 445 [2018-09-30 20:13:33,686 INFO L226 Difference]: Without dead ends: 246 [2018-09-30 20:13:33,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3337 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4897, Invalid=16273, Unknown=0, NotChecked=0, Total=21170 [2018-09-30 20:13:33,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-09-30 20:13:33,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-09-30 20:13:33,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-09-30 20:13:33,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 248 transitions. [2018-09-30 20:13:33,721 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 248 transitions. Word has length 242 [2018-09-30 20:13:33,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:33,721 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 248 transitions. [2018-09-30 20:13:33,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 20:13:33,721 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 248 transitions. [2018-09-30 20:13:33,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-30 20:13:33,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:33,722 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 47, 47, 1, 1, 1, 1, 1] [2018-09-30 20:13:33,722 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:33,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:33,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1883780879, now seen corresponding path program 94 times [2018-09-30 20:13:33,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:33,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:33,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:33,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:33,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 1270 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:34,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:34,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:34,841 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:13:34,948 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:13:34,949 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:34,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:35,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 1270 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:35,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:35,028 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 20:13:35,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 20:13:35,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 20:13:35,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 20:13:35,029 INFO L87 Difference]: Start difference. First operand 246 states and 248 transitions. Second operand 51 states. [2018-09-30 20:13:35,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:35,328 INFO L93 Difference]: Finished difference Result 260 states and 263 transitions. [2018-09-30 20:13:35,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:13:35,329 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 243 [2018-09-30 20:13:35,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:35,330 INFO L225 Difference]: With dead ends: 260 [2018-09-30 20:13:35,330 INFO L226 Difference]: Without dead ends: 254 [2018-09-30 20:13:35,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 20:13:35,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-09-30 20:13:35,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 250. [2018-09-30 20:13:35,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-09-30 20:13:35,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 252 transitions. [2018-09-30 20:13:35,356 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 252 transitions. Word has length 243 [2018-09-30 20:13:35,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:35,356 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 252 transitions. [2018-09-30 20:13:35,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 20:13:35,356 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 252 transitions. [2018-09-30 20:13:35,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-09-30 20:13:35,357 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:35,357 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 48, 1, 1, 1, 1, 1] [2018-09-30 20:13:35,357 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:35,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:35,358 INFO L82 PathProgramCache]: Analyzing trace with hash 514120679, now seen corresponding path program 95 times [2018-09-30 20:13:35,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:35,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:35,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:35,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:35,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:38,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5880 backedges. 4704 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:38,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:38,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:38,342 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:13:38,524 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 20:13:38,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:38,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5880 backedges. 4704 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:38,603 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:38,603 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 20:13:38,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 20:13:38,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 20:13:38,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2549, Invalid=7351, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 20:13:38,605 INFO L87 Difference]: Start difference. First operand 250 states and 252 transitions. Second operand 100 states. [2018-09-30 20:13:42,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:42,143 INFO L93 Difference]: Finished difference Result 454 states and 458 transitions. [2018-09-30 20:13:42,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 20:13:42,143 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 247 [2018-09-30 20:13:42,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:42,144 INFO L225 Difference]: With dead ends: 454 [2018-09-30 20:13:42,144 INFO L226 Difference]: Without dead ends: 251 [2018-09-30 20:13:42,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3480 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5097, Invalid=16955, Unknown=0, NotChecked=0, Total=22052 [2018-09-30 20:13:42,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-09-30 20:13:42,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-09-30 20:13:42,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-09-30 20:13:42,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 253 transitions. [2018-09-30 20:13:42,172 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 253 transitions. Word has length 247 [2018-09-30 20:13:42,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:42,173 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 253 transitions. [2018-09-30 20:13:42,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 20:13:42,173 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 253 transitions. [2018-09-30 20:13:42,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-30 20:13:42,173 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:42,174 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 48, 48, 1, 1, 1, 1, 1] [2018-09-30 20:13:42,174 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:42,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:42,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1107028914, now seen corresponding path program 96 times [2018-09-30 20:13:42,174 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:42,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:42,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:42,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:42,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 1321 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:43,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:43,598 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:43,606 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:13:43,784 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 20:13:43,784 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:43,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:43,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 1321 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:43,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:43,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 20:13:43,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 20:13:43,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 20:13:43,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 20:13:43,864 INFO L87 Difference]: Start difference. First operand 251 states and 253 transitions. Second operand 52 states. [2018-09-30 20:13:44,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:44,204 INFO L93 Difference]: Finished difference Result 265 states and 268 transitions. [2018-09-30 20:13:44,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 20:13:44,204 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 248 [2018-09-30 20:13:44,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:44,205 INFO L225 Difference]: With dead ends: 265 [2018-09-30 20:13:44,205 INFO L226 Difference]: Without dead ends: 259 [2018-09-30 20:13:44,206 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 20:13:44,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-30 20:13:44,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 255. [2018-09-30 20:13:44,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-09-30 20:13:44,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 257 transitions. [2018-09-30 20:13:44,232 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 257 transitions. Word has length 248 [2018-09-30 20:13:44,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:44,233 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 257 transitions. [2018-09-30 20:13:44,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 20:13:44,233 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 257 transitions. [2018-09-30 20:13:44,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-09-30 20:13:44,233 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:44,234 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 49, 1, 1, 1, 1, 1] [2018-09-30 20:13:44,234 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:44,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:44,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1827811524, now seen corresponding path program 97 times [2018-09-30 20:13:44,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:44,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:44,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:44,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:44,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6125 backedges. 4900 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:47,116 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:47,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:47,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:47,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6125 backedges. 4900 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:47,320 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:47,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 20:13:47,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 20:13:47,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 20:13:47,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 20:13:47,322 INFO L87 Difference]: Start difference. First operand 255 states and 257 transitions. Second operand 102 states. [2018-09-30 20:13:50,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:50,601 INFO L93 Difference]: Finished difference Result 463 states and 467 transitions. [2018-09-30 20:13:50,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 20:13:50,601 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 252 [2018-09-30 20:13:50,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:50,602 INFO L225 Difference]: With dead ends: 463 [2018-09-30 20:13:50,602 INFO L226 Difference]: Without dead ends: 256 [2018-09-30 20:13:50,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5301, Invalid=17651, Unknown=0, NotChecked=0, Total=22952 [2018-09-30 20:13:50,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-09-30 20:13:50,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2018-09-30 20:13:50,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-09-30 20:13:50,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 258 transitions. [2018-09-30 20:13:50,631 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 258 transitions. Word has length 252 [2018-09-30 20:13:50,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:50,631 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 258 transitions. [2018-09-30 20:13:50,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 20:13:50,631 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 258 transitions. [2018-09-30 20:13:50,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-09-30 20:13:50,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:50,632 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 49, 49, 1, 1, 1, 1, 1] [2018-09-30 20:13:50,633 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:50,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:50,633 INFO L82 PathProgramCache]: Analyzing trace with hash -803659587, now seen corresponding path program 98 times [2018-09-30 20:13:50,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:50,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:50,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:50,634 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:13:50,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:51,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 1373 proven. 4802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:51,750 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:51,750 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:51,759 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:13:51,871 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:13:51,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:51,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 1373 proven. 4802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:51,953 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:51,953 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 20:13:51,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:13:51,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:13:51,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:13:51,954 INFO L87 Difference]: Start difference. First operand 256 states and 258 transitions. Second operand 53 states. [2018-09-30 20:13:52,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:52,255 INFO L93 Difference]: Finished difference Result 270 states and 273 transitions. [2018-09-30 20:13:52,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:13:52,255 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 253 [2018-09-30 20:13:52,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:52,256 INFO L225 Difference]: With dead ends: 270 [2018-09-30 20:13:52,257 INFO L226 Difference]: Without dead ends: 264 [2018-09-30 20:13:52,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 20:13:52,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-09-30 20:13:52,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2018-09-30 20:13:52,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2018-09-30 20:13:52,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 262 transitions. [2018-09-30 20:13:52,291 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 262 transitions. Word has length 253 [2018-09-30 20:13:52,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:52,291 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 262 transitions. [2018-09-30 20:13:52,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:13:52,291 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 262 transitions. [2018-09-30 20:13:52,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-09-30 20:13:52,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:52,292 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 1, 1, 1, 1, 1] [2018-09-30 20:13:52,292 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:52,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:52,293 INFO L82 PathProgramCache]: Analyzing trace with hash 465399219, now seen corresponding path program 99 times [2018-09-30 20:13:52,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:52,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:52,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:52,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:52,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:52,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:13:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6375 backedges. 5100 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:55,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:13:55,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:13:55,688 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:13:55,907 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-30 20:13:55,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:13:55,914 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:13:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6375 backedges. 5100 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:13:55,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:13:55,991 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 20:13:55,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 20:13:55,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 20:13:55,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2755, Invalid=7957, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 20:13:55,993 INFO L87 Difference]: Start difference. First operand 260 states and 262 transitions. Second operand 104 states. [2018-09-30 20:13:59,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:13:59,860 INFO L93 Difference]: Finished difference Result 472 states and 476 transitions. [2018-09-30 20:13:59,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 20:13:59,860 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 257 [2018-09-30 20:13:59,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:13:59,862 INFO L225 Difference]: With dead ends: 472 [2018-09-30 20:13:59,862 INFO L226 Difference]: Without dead ends: 261 [2018-09-30 20:13:59,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3775 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=5509, Invalid=18361, Unknown=0, NotChecked=0, Total=23870 [2018-09-30 20:13:59,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-09-30 20:13:59,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-09-30 20:13:59,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-09-30 20:13:59,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 263 transitions. [2018-09-30 20:13:59,890 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 263 transitions. Word has length 257 [2018-09-30 20:13:59,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:13:59,890 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 263 transitions. [2018-09-30 20:13:59,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 20:13:59,890 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 263 transitions. [2018-09-30 20:13:59,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-30 20:13:59,891 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:13:59,891 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 50, 50, 1, 1, 1, 1, 1] [2018-09-30 20:13:59,891 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:13:59,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:13:59,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1064997210, now seen corresponding path program 100 times [2018-09-30 20:13:59,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:13:59,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:13:59,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:59,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:13:59,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:13:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:01,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 1426 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:01,055 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:01,055 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:01,084 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:14:01,208 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:14:01,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:01,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 1426 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:01,295 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:01,295 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 20:14:01,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 20:14:01,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 20:14:01,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:14:01,296 INFO L87 Difference]: Start difference. First operand 261 states and 263 transitions. Second operand 54 states. [2018-09-30 20:14:01,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:01,653 INFO L93 Difference]: Finished difference Result 275 states and 278 transitions. [2018-09-30 20:14:01,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 20:14:01,653 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 258 [2018-09-30 20:14:01,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:01,654 INFO L225 Difference]: With dead ends: 275 [2018-09-30 20:14:01,654 INFO L226 Difference]: Without dead ends: 269 [2018-09-30 20:14:01,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 20:14:01,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-09-30 20:14:01,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 265. [2018-09-30 20:14:01,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-09-30 20:14:01,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 267 transitions. [2018-09-30 20:14:01,684 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 267 transitions. Word has length 258 [2018-09-30 20:14:01,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:01,684 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 267 transitions. [2018-09-30 20:14:01,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 20:14:01,684 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 267 transitions. [2018-09-30 20:14:01,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-09-30 20:14:01,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:01,685 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 51, 1, 1, 1, 1, 1] [2018-09-30 20:14:01,685 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:01,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:01,685 INFO L82 PathProgramCache]: Analyzing trace with hash 629884880, now seen corresponding path program 101 times [2018-09-30 20:14:01,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:01,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:01,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:01,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:01,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6630 backedges. 5304 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:05,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:05,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:05,093 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:14:05,413 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-30 20:14:05,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:05,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:05,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6630 backedges. 5304 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:05,531 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:05,531 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 20:14:05,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 20:14:05,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 20:14:05,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2861, Invalid=8269, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 20:14:05,533 INFO L87 Difference]: Start difference. First operand 265 states and 267 transitions. Second operand 106 states. [2018-09-30 20:14:09,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:09,742 INFO L93 Difference]: Finished difference Result 481 states and 485 transitions. [2018-09-30 20:14:09,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 20:14:09,743 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 262 [2018-09-30 20:14:09,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:09,743 INFO L225 Difference]: With dead ends: 481 [2018-09-30 20:14:09,743 INFO L226 Difference]: Without dead ends: 266 [2018-09-30 20:14:09,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3927 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5721, Invalid=19085, Unknown=0, NotChecked=0, Total=24806 [2018-09-30 20:14:09,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-09-30 20:14:09,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2018-09-30 20:14:09,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2018-09-30 20:14:09,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 268 transitions. [2018-09-30 20:14:09,775 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 268 transitions. Word has length 262 [2018-09-30 20:14:09,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:09,775 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 268 transitions. [2018-09-30 20:14:09,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 20:14:09,775 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 268 transitions. [2018-09-30 20:14:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-09-30 20:14:09,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:09,776 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 52, 51, 51, 1, 1, 1, 1, 1] [2018-09-30 20:14:09,777 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:09,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:09,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1501211511, now seen corresponding path program 102 times [2018-09-30 20:14:09,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:09,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:09,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:09,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:09,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 1480 proven. 5202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:11,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:11,010 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:11,018 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:14:11,218 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-30 20:14:11,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:14:11,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:11,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 1480 proven. 5202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:11,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:11,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 20:14:11,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 20:14:11,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 20:14:11,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 20:14:11,313 INFO L87 Difference]: Start difference. First operand 266 states and 268 transitions. Second operand 55 states. [2018-09-30 20:14:11,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:11,652 INFO L93 Difference]: Finished difference Result 280 states and 283 transitions. [2018-09-30 20:14:11,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:14:11,652 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 263 [2018-09-30 20:14:11,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:11,653 INFO L225 Difference]: With dead ends: 280 [2018-09-30 20:14:11,653 INFO L226 Difference]: Without dead ends: 274 [2018-09-30 20:14:11,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 20:14:11,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-09-30 20:14:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2018-09-30 20:14:11,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-09-30 20:14:11,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 272 transitions. [2018-09-30 20:14:11,683 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 272 transitions. Word has length 263 [2018-09-30 20:14:11,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:11,684 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 272 transitions. [2018-09-30 20:14:11,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 20:14:11,684 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 272 transitions. [2018-09-30 20:14:11,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-09-30 20:14:11,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:11,685 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 52, 1, 1, 1, 1, 1] [2018-09-30 20:14:11,685 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:11,685 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:11,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1240278145, now seen corresponding path program 103 times [2018-09-30 20:14:11,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:11,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:11,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:11,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:14:11,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6890 backedges. 5512 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:15,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:14:15,084 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:14:15,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:14:15,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:14:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6890 backedges. 5512 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:14:15,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:14:15,332 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 20:14:15,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 20:14:15,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 20:14:15,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2969, Invalid=8587, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 20:14:15,333 INFO L87 Difference]: Start difference. First operand 270 states and 272 transitions. Second operand 108 states. [2018-09-30 20:14:19,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:14:19,657 INFO L93 Difference]: Finished difference Result 490 states and 494 transitions. [2018-09-30 20:14:19,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 20:14:19,657 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 267 [2018-09-30 20:14:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:14:19,658 INFO L225 Difference]: With dead ends: 490 [2018-09-30 20:14:19,658 INFO L226 Difference]: Without dead ends: 271 [2018-09-30 20:14:19,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4082 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5937, Invalid=19823, Unknown=0, NotChecked=0, Total=25760 [2018-09-30 20:14:19,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-09-30 20:14:19,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-09-30 20:14:19,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-09-30 20:14:19,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 273 transitions. [2018-09-30 20:14:19,688 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 273 transitions. Word has length 267 [2018-09-30 20:14:19,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:14:19,688 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 273 transitions. [2018-09-30 20:14:19,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 20:14:19,688 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 273 transitions. [2018-09-30 20:14:19,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-09-30 20:14:19,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:14:19,689 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 53, 52, 52, 1, 1, 1, 1, 1] [2018-09-30 20:14:19,689 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:14:19,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 20:14:19,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1999690342, now seen corresponding path program 104 times [2018-09-30 20:14:19,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:14:19,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:14:19,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:19,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:14:19,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:14:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-30 20:14:19,908 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:14:19,913 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:14:19,913 INFO L202 PluginConnector]: Adding new model down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:14:19 BoogieIcfgContainer [2018-09-30 20:14:19,913 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:14:19,914 INFO L168 Benchmark]: Toolchain (without parser) took 234379.74 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 267.9 MB). Free memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: -243.5 MB). Peak memory consumption was 892.0 MB. Max. memory is 7.1 GB. [2018-09-30 20:14:19,916 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:14:19,917 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.59 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:14:19,917 INFO L168 Benchmark]: Boogie Preprocessor took 24.36 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:14:19,917 INFO L168 Benchmark]: RCFGBuilder took 344.44 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:14:19,917 INFO L168 Benchmark]: TraceAbstraction took 233961.47 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 267.9 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -264.6 MB). Peak memory consumption was 870.8 MB. Max. memory is 7.1 GB. [2018-09-30 20:14:19,919 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 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 43.59 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.36 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 344.44 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 233961.47 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 267.9 MB). Free memory was 1.4 GB in the beginning and 1.7 GB in the end (delta: -264.6 MB). Peak memory consumption was 870.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 76). Cancelled while BasicCegarLoop was analyzing trace of length 269 with TraceHistMax 53, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 17 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 233.8s OverallTime, 108 OverallIterations, 53 TraceHistogramMax, 108.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3302 SDtfs, 7619 SDslu, 74152 SDs, 0 SdLazy, 79668 SolverSat, 1660 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 46.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21351 GetRequests, 15624 SyntacticMatches, 0 SemanticMatches, 5727 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73034 ImplicationChecksByTransitivity, 143.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=271occurred in iteration=107, 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: 1.6s AutomataMinimizationTime, 107 MinimizatonAttempts, 214 StatesRemovedByMinimization, 54 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.6s SsaConstructionTime, 8.8s SatisfiabilityAnalysisTime, 106.8s InterpolantComputationTime, 28614 NumberOfCodeBlocks, 28614 NumberOfCodeBlocksAsserted, 1604 NumberOfCheckSat, 28404 ConstructedInterpolants, 0 QuantifiedInterpolants, 14943864 SizeOfPredicates, 207 NumberOfNonLiveVariables, 45579 ConjunctsInSsa, 5769 ConjunctsInUnsatCore, 210 InterpolantComputations, 4 PerfectInterpolantSequences, 253344/485056 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-14-19-928.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-14-19-928.csv Completed graceful shutdown