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/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-bd42740 [2018-09-23 21:22:23,202 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 21:22:23,204 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 21:22:23,216 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 21:22:23,217 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 21:22:23,218 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 21:22:23,219 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 21:22:23,221 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 21:22:23,223 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 21:22:23,223 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 21:22:23,224 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-09-23 21:22:23,262 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 [2018-09-23 21:22:23,291 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 21:22:23,291 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 21:22:23,292 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 21:22:23,293 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 21:22:23,294 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 21:22:23,294 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 21:22:23,294 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 21:22:23,294 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 21:22:23,295 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 21:22:23,296 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 21:22:23,296 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 21:22:23,296 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 21:22:23,296 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 21:22:23,296 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 21:22:23,297 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 21:22:23,297 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 21:22:23,297 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 21:22:23,297 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 21:22:23,297 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 21:22:23,298 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 21:22:23,298 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 21:22:23,298 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 21:22:23,298 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:22:23,300 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 21:22:23,300 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 21:22:23,300 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 21:22:23,300 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 21:22:23,300 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 21:22:23,301 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 21:22:23,301 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 21:22:23,371 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 21:22:23,384 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 21:22:23,388 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 21:22:23,389 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 21:22:23,390 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 21:22:23,391 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl [2018-09-23 21:22:23,391 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl' [2018-09-23 21:22:23,446 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 21:22:23,449 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 21:22:23,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 21:22:23,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 21:22:23,451 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 21:22:23,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:23" (1/1) ... [2018-09-23 21:22:23,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:23" (1/1) ... [2018-09-23 21:22:23,492 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 21:22:23,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 21:22:23,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 21:22:23,493 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 21:22:23,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:23" (1/1) ... [2018-09-23 21:22:23,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:23" (1/1) ... [2018-09-23 21:22:23,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:23" (1/1) ... [2018-09-23 21:22:23,505 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:23" (1/1) ... [2018-09-23 21:22:23,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:23" (1/1) ... [2018-09-23 21:22:23,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:23" (1/1) ... [2018-09-23 21:22:23,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:23" (1/1) ... [2018-09-23 21:22:23,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 21:22:23,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 21:22:23,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 21:22:23,517 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 21:22:23,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:23" (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 [2018-09-23 21:22:23,582 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-23 21:22:23,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 21:22:23,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 21:22:23,778 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 21:22:23,779 INFO L202 PluginConnector]: Adding new model overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:22:23 BoogieIcfgContainer [2018-09-23 21:22:23,779 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 21:22:23,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 21:22:23,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 21:22:23,784 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 21:22:23,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:22:23" (1/2) ... [2018-09-23 21:22:23,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec241c0 and model type overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 09:22:23, skipping insertion in model container [2018-09-23 21:22:23,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:22:23" (2/2) ... [2018-09-23 21:22:23,787 INFO L112 eAbstractionObserver]: Analyzing ICFG overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl [2018-09-23 21:22:23,797 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 21:22:23,806 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 21:22:23,871 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 21:22:23,872 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 21:22:23,873 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 21:22:23,873 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 21:22:23,873 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 21:22:23,873 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 21:22:23,873 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 21:22:23,874 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 21:22:23,874 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 21:22:23,895 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-23 21:22:23,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-23 21:22:23,913 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:23,914 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-23 21:22:23,916 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:23,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:23,925 INFO L82 PathProgramCache]: Analyzing trace with hash 30017, now seen corresponding path program 1 times [2018-09-23 21:22:23,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:23,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:23,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:23,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:23,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:24,099 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:22:24,100 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 21:22:24,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:22:24,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:22:24,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:22:24,121 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-23 21:22:24,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:24,170 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-23 21:22:24,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:22:24,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-23 21:22:24,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:24,183 INFO L225 Difference]: With dead ends: 9 [2018-09-23 21:22:24,184 INFO L226 Difference]: Without dead ends: 5 [2018-09-23 21:22:24,187 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 [2018-09-23 21:22:24,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-23 21:22:24,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-23 21:22:24,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-23 21:22:24,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-23 21:22:24,225 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-23 21:22:24,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:24,226 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-23 21:22:24,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:22:24,226 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-23 21:22:24,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 21:22:24,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:24,227 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-23 21:22:24,227 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:24,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:24,228 INFO L82 PathProgramCache]: Analyzing trace with hash 928552, now seen corresponding path program 1 times [2018-09-23 21:22:24,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:24,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:24,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:24,229 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:24,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:24,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:24,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:24,362 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:24,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:24,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:24,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 21:22:24,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 21:22:24,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 21:22:24,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:22:24,466 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-23 21:22:24,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:24,559 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-23 21:22:24,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 21:22:24,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-23 21:22:24,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:24,561 INFO L225 Difference]: With dead ends: 8 [2018-09-23 21:22:24,561 INFO L226 Difference]: Without dead ends: 6 [2018-09-23 21:22:24,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:22:24,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-23 21:22:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-23 21:22:24,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-23 21:22:24,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-23 21:22:24,565 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-23 21:22:24,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:24,565 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-23 21:22:24,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 21:22:24,565 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-23 21:22:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 21:22:24,566 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:24,566 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-23 21:22:24,566 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:24,567 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:24,567 INFO L82 PathProgramCache]: Analyzing trace with hash 28783137, now seen corresponding path program 2 times [2018-09-23 21:22:24,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:24,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:24,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:24,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:24,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:24,852 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:24,852 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 [2018-09-23 21:22:24,873 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:24,899 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:24,900 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:24,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:24,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:24,929 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:24,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 21:22:24,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 21:22:24,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 21:22:24,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:22:24,931 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-23 21:22:25,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:25,005 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-23 21:22:25,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:22:25,005 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-23 21:22:25,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:25,006 INFO L225 Difference]: With dead ends: 9 [2018-09-23 21:22:25,006 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 21:22:25,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:22:25,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 21:22:25,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 21:22:25,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 21:22:25,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-23 21:22:25,012 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-23 21:22:25,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:25,013 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-23 21:22:25,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 21:22:25,013 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-23 21:22:25,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 21:22:25,013 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:25,014 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-23 21:22:25,014 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:25,014 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:25,014 INFO L82 PathProgramCache]: Analyzing trace with hash 892275272, now seen corresponding path program 3 times [2018-09-23 21:22:25,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:25,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:25,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:25,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:25,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:25,142 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:25,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:25,153 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:25,176 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 21:22:25,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:25,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:25,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:25,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:25,205 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 21:22:25,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:22:25,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:22:25,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:22:25,206 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-23 21:22:25,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:25,257 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-23 21:22:25,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:22:25,258 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-23 21:22:25,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:25,258 INFO L225 Difference]: With dead ends: 10 [2018-09-23 21:22:25,259 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 21:22:25,259 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:22:25,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 21:22:25,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 21:22:25,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 21:22:25,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-23 21:22:25,263 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-23 21:22:25,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:25,263 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-23 21:22:25,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:22:25,264 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-23 21:22:25,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 21:22:25,264 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:25,265 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-23 21:22:25,265 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:25,265 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:25,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1890727681, now seen corresponding path program 4 times [2018-09-23 21:22:25,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:25,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:25,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:25,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:25,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:25,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:25,538 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:25,538 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 [2018-09-23 21:22:25,551 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:25,563 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:25,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:25,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:25,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:25,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:25,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 21:22:25,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 21:22:25,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 21:22:25,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:22:25,597 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-23 21:22:25,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:25,641 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 21:22:25,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 21:22:25,642 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-23 21:22:25,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:25,642 INFO L225 Difference]: With dead ends: 11 [2018-09-23 21:22:25,642 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 21:22:25,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:22:25,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 21:22:25,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 21:22:25,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 21:22:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-23 21:22:25,648 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-23 21:22:25,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:25,648 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-23 21:22:25,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 21:22:25,649 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-23 21:22:25,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 21:22:25,649 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:25,649 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-23 21:22:25,650 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:25,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:25,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1516986008, now seen corresponding path program 5 times [2018-09-23 21:22:25,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:25,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:25,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:25,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:25,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:25,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:25,829 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 [2018-09-23 21:22:25,838 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:25,852 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 21:22:25,852 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:25,854 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:25,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:25,886 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 21:22:25,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:22:25,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:22:25,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:22:25,888 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-23 21:22:26,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:26,015 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-23 21:22:26,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:22:26,019 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-23 21:22:26,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:26,020 INFO L225 Difference]: With dead ends: 12 [2018-09-23 21:22:26,020 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 21:22:26,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:22:26,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 21:22:26,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 21:22:26,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 21:22:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-23 21:22:26,024 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-23 21:22:26,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:26,025 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-23 21:22:26,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:22:26,026 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-23 21:22:26,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 21:22:26,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:26,027 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-23 21:22:26,027 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:26,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:26,027 INFO L82 PathProgramCache]: Analyzing trace with hash 218072033, now seen corresponding path program 6 times [2018-09-23 21:22:26,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:26,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:26,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:26,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:26,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:26,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:26,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:26,162 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:26,180 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-23 21:22:26,180 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:26,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:26,190 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:26,211 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:26,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 21:22:26,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 21:22:26,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 21:22:26,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:22:26,213 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-23 21:22:26,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:26,243 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-23 21:22:26,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:22:26,244 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-23 21:22:26,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:26,244 INFO L225 Difference]: With dead ends: 13 [2018-09-23 21:22:26,244 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 21:22:26,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:22:26,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 21:22:26,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 21:22:26,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 21:22:26,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-23 21:22:26,249 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-23 21:22:26,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:26,249 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-23 21:22:26,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 21:22:26,249 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-23 21:22:26,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 21:22:26,250 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:26,250 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-23 21:22:26,250 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:26,250 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:26,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1829703544, now seen corresponding path program 7 times [2018-09-23 21:22:26,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:26,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:26,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:26,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:26,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:26,492 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:26,493 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:26,493 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 [2018-09-23 21:22:26,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:26,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:26,542 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:26,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:26,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 21:22:26,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:22:26,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:22:26,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:22:26,578 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-23 21:22:26,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:26,809 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-23 21:22:26,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:22:26,810 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-23 21:22:26,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:26,811 INFO L225 Difference]: With dead ends: 14 [2018-09-23 21:22:26,811 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 21:22:26,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:22:26,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 21:22:26,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-23 21:22:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 21:22:26,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-23 21:22:26,819 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-23 21:22:26,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:26,819 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-23 21:22:26,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:22:26,819 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-23 21:22:26,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 21:22:26,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:26,820 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-23 21:22:26,821 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:26,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:26,822 INFO L82 PathProgramCache]: Analyzing trace with hash -886236991, now seen corresponding path program 8 times [2018-09-23 21:22:26,822 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:26,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:26,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:26,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:26,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:26,983 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:26,984 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:26,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:26,996 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:27,007 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:27,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:27,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:27,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:27,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 21:22:27,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 21:22:27,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 21:22:27,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:22:27,047 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-23 21:22:27,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:27,139 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-23 21:22:27,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:22:27,140 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-23 21:22:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:27,140 INFO L225 Difference]: With dead ends: 15 [2018-09-23 21:22:27,141 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 21:22:27,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:22:27,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 21:22:27,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 21:22:27,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 21:22:27,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-23 21:22:27,145 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-23 21:22:27,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:27,145 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-23 21:22:27,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 21:22:27,145 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-23 21:22:27,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 21:22:27,146 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:27,146 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-23 21:22:27,146 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:27,146 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:27,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1703544920, now seen corresponding path program 9 times [2018-09-23 21:22:27,147 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:27,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:27,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:27,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:27,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:27,360 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:27,361 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 [2018-09-23 21:22:27,372 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:27,384 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 21:22:27,385 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:27,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:27,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:27,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 21:22:27,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:22:27,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:22:27,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:22:27,418 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-23 21:22:27,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:27,466 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-23 21:22:27,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:22:27,467 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-23 21:22:27,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:27,468 INFO L225 Difference]: With dead ends: 16 [2018-09-23 21:22:27,468 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 21:22:27,468 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:22:27,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 21:22:27,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-23 21:22:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 21:22:27,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-23 21:22:27,472 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-23 21:22:27,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:27,473 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-23 21:22:27,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:22:27,473 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-23 21:22:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 21:22:27,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:27,474 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-23 21:22:27,474 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:27,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:27,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1270286943, now seen corresponding path program 10 times [2018-09-23 21:22:27,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:27,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:27,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:27,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:27,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:27,804 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:27,805 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 [2018-09-23 21:22:27,812 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:27,826 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:27,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:27,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:27,859 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:27,859 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 21:22:27,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:22:27,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:22:27,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:22:27,860 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-23 21:22:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:27,913 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-23 21:22:27,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:22:27,914 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-23 21:22:27,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:27,915 INFO L225 Difference]: With dead ends: 17 [2018-09-23 21:22:27,916 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 21:22:27,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:22:27,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 21:22:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 21:22:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 21:22:27,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-23 21:22:27,919 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-23 21:22:27,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:27,920 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-23 21:22:27,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:22:27,920 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-23 21:22:27,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 21:22:27,921 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:27,921 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-23 21:22:27,921 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:27,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:27,921 INFO L82 PathProgramCache]: Analyzing trace with hash -724191544, now seen corresponding path program 11 times [2018-09-23 21:22:27,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:27,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:27,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:27,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:27,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:28,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:28,196 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:28,208 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:28,225 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 21:22:28,225 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:28,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:28,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:28,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 21:22:28,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:22:28,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:22:28,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:22:28,260 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-23 21:22:28,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:28,309 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-23 21:22:28,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:22:28,309 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-23 21:22:28,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:28,310 INFO L225 Difference]: With dead ends: 18 [2018-09-23 21:22:28,310 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 21:22:28,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:22:28,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 21:22:28,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 21:22:28,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 21:22:28,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-23 21:22:28,315 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-23 21:22:28,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:28,315 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-23 21:22:28,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:22:28,315 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-23 21:22:28,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 21:22:28,316 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:28,316 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-23 21:22:28,316 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:28,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:28,317 INFO L82 PathProgramCache]: Analyzing trace with hash -975103359, now seen corresponding path program 12 times [2018-09-23 21:22:28,317 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:28,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:28,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:28,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:28,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:28,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:28,523 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:28,524 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:28,533 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:28,545 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 21:22:28,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:28,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:28,584 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:28,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 21:22:28,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:22:28,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:22:28,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:22:28,586 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-23 21:22:28,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:28,623 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-23 21:22:28,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 21:22:28,626 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-23 21:22:28,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:28,627 INFO L225 Difference]: With dead ends: 19 [2018-09-23 21:22:28,627 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 21:22:28,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:22:28,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 21:22:28,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 21:22:28,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 21:22:28,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-23 21:22:28,631 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-23 21:22:28,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:28,632 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-23 21:22:28,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:22:28,632 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-23 21:22:28,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 21:22:28,632 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:28,633 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-23 21:22:28,633 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:28,633 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:28,633 INFO L82 PathProgramCache]: Analyzing trace with hash -163435032, now seen corresponding path program 13 times [2018-09-23 21:22:28,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:28,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:28,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:28,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:28,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:28,897 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:28,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:28,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:28,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:28,923 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:28,965 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:28,965 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 21:22:28,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:22:28,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:22:28,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:22:28,967 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-23 21:22:29,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:29,269 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-23 21:22:29,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:22:29,269 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-23 21:22:29,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:29,270 INFO L225 Difference]: With dead ends: 20 [2018-09-23 21:22:29,270 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 21:22:29,272 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:22:29,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 21:22:29,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-23 21:22:29,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 21:22:29,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-23 21:22:29,279 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-23 21:22:29,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:29,280 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-23 21:22:29,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:22:29,280 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-23 21:22:29,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 21:22:29,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:29,281 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-23 21:22:29,281 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:29,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:29,282 INFO L82 PathProgramCache]: Analyzing trace with hash -771520671, now seen corresponding path program 14 times [2018-09-23 21:22:29,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:29,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:29,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:29,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:29,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:29,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:29,527 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 [2018-09-23 21:22:29,541 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:29,567 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:29,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:29,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:29,600 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:29,600 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 21:22:29,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 21:22:29,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 21:22:29,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:22:29,601 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-23 21:22:29,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:29,941 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-23 21:22:29,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:22:29,942 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-23 21:22:29,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:29,942 INFO L225 Difference]: With dead ends: 21 [2018-09-23 21:22:29,943 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 21:22:29,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:22:29,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 21:22:29,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 21:22:29,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 21:22:29,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-23 21:22:29,947 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-23 21:22:29,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:29,947 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-23 21:22:29,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 21:22:29,948 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-23 21:22:29,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:22:29,948 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:29,948 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-23 21:22:29,949 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:29,949 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:29,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1852661000, now seen corresponding path program 15 times [2018-09-23 21:22:29,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:29,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:29,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:29,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:29,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:29,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:30,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:30,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:30,208 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:30,233 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 21:22:30,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:30,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:30,270 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:30,271 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 21:22:30,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:22:30,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:22:30,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:22:30,272 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-23 21:22:30,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:30,304 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-23 21:22:30,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:22:30,304 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-23 21:22:30,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:30,305 INFO L225 Difference]: With dead ends: 22 [2018-09-23 21:22:30,305 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 21:22:30,306 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:22:30,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 21:22:30,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-23 21:22:30,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 21:22:30,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-23 21:22:30,309 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-23 21:22:30,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:30,310 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-23 21:22:30,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:22:30,310 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-23 21:22:30,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 21:22:30,311 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:30,311 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-23 21:22:30,311 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:30,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:30,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1597914177, now seen corresponding path program 16 times [2018-09-23 21:22:30,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:30,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:30,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:30,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:30,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:30,719 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:30,720 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 [2018-09-23 21:22:30,728 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:30,746 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:30,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:30,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:30,790 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:30,790 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 21:22:30,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 21:22:30,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 21:22:30,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:22:30,791 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-23 21:22:30,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:30,978 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-23 21:22:30,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 21:22:30,979 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-23 21:22:30,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:30,979 INFO L225 Difference]: With dead ends: 23 [2018-09-23 21:22:30,979 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 21:22:30,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:22:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 21:22:30,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 21:22:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 21:22:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-23 21:22:30,983 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-23 21:22:30,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:30,984 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-23 21:22:30,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 21:22:30,984 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-23 21:22:30,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 21:22:30,985 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:30,985 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-23 21:22:30,985 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:30,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:30,985 INFO L82 PathProgramCache]: Analyzing trace with hash -2004270040, now seen corresponding path program 17 times [2018-09-23 21:22:30,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:30,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:30,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:30,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:30,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:31,493 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:31,494 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:31,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:31,502 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:31,524 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-23 21:22:31,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:31,526 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:31,537 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:31,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:31,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 21:22:31,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:22:31,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:22:31,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:22:31,570 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-23 21:22:31,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:31,707 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-23 21:22:31,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:22:31,708 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-23 21:22:31,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:31,709 INFO L225 Difference]: With dead ends: 24 [2018-09-23 21:22:31,709 INFO L226 Difference]: Without dead ends: 22 [2018-09-23 21:22:31,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:22:31,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-23 21:22:31,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-23 21:22:31,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 21:22:31,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-23 21:22:31,713 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-23 21:22:31,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:31,713 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-23 21:22:31,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:22:31,714 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-23 21:22:31,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 21:22:31,714 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:31,714 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-23 21:22:31,715 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:31,715 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:31,715 INFO L82 PathProgramCache]: Analyzing trace with hash -2002831071, now seen corresponding path program 18 times [2018-09-23 21:22:31,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:31,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:31,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:31,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:31,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:32,043 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:32,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:32,043 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 [2018-09-23 21:22:32,053 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:32,204 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-23 21:22:32,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:32,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:32,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:32,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 21:22:32,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:22:32,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:22:32,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:22:32,254 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-23 21:22:32,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:32,363 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-23 21:22:32,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:22:32,363 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-23 21:22:32,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:32,364 INFO L225 Difference]: With dead ends: 25 [2018-09-23 21:22:32,365 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 21:22:32,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:22:32,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 21:22:32,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 21:22:32,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 21:22:32,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-23 21:22:32,370 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-23 21:22:32,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:32,370 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-23 21:22:32,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 21:22:32,371 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-23 21:22:32,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 21:22:32,371 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:32,372 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-23 21:22:32,372 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:32,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:32,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1958223032, now seen corresponding path program 19 times [2018-09-23 21:22:32,372 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:32,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:32,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:32,374 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:32,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:32,692 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:32,692 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:32,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:32,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:32,776 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:32,776 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 21:22:32,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:22:32,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:22:32,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:22:32,778 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-23 21:22:32,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:32,869 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-23 21:22:32,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 21:22:32,869 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-23 21:22:32,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:32,870 INFO L225 Difference]: With dead ends: 26 [2018-09-23 21:22:32,870 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 21:22:32,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:22:32,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 21:22:32,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-23 21:22:32,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 21:22:32,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-23 21:22:32,876 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-23 21:22:32,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:32,876 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-23 21:22:32,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:22:32,876 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-23 21:22:32,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 21:22:32,877 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:32,877 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-23 21:22:32,877 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:32,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:32,877 INFO L82 PathProgramCache]: Analyzing trace with hash -575373823, now seen corresponding path program 20 times [2018-09-23 21:22:32,878 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:32,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:32,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:32,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:32,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:33,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:33,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:33,153 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:33,165 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:33,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:33,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:33,208 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:33,208 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 21:22:33,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 21:22:33,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 21:22:33,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:22:33,210 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-23 21:22:33,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:33,427 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-23 21:22:33,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:22:33,428 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-23 21:22:33,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:33,428 INFO L225 Difference]: With dead ends: 27 [2018-09-23 21:22:33,429 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 21:22:33,430 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:22:33,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 21:22:33,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 21:22:33,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 21:22:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-23 21:22:33,433 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-23 21:22:33,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:33,433 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-23 21:22:33,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 21:22:33,434 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-23 21:22:33,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 21:22:33,434 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:33,434 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-23 21:22:33,435 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:33,435 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:33,435 INFO L82 PathProgramCache]: Analyzing trace with hash -656721304, now seen corresponding path program 21 times [2018-09-23 21:22:33,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:33,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:33,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:33,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:33,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:33,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:33,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:33,809 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:33,828 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 21:22:33,828 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:33,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:33,839 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:33,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:33,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 21:22:33,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:22:33,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:22:33,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:22:33,862 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-23 21:22:33,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:33,949 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-23 21:22:33,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:22:33,952 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-23 21:22:33,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:33,952 INFO L225 Difference]: With dead ends: 28 [2018-09-23 21:22:33,952 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 21:22:33,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:22:33,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 21:22:33,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-23 21:22:33,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 21:22:33,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-23 21:22:33,956 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-23 21:22:33,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:33,956 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-23 21:22:33,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:22:33,956 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-23 21:22:33,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 21:22:33,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:33,957 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-23 21:22:33,957 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:33,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:33,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1116474081, now seen corresponding path program 22 times [2018-09-23 21:22:33,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:33,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:33,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:33,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:33,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:34,273 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:34,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:34,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:34,288 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:34,326 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:34,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:34,329 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:34,362 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:34,362 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 21:22:34,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 21:22:34,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 21:22:34,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:22:34,364 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-23 21:22:34,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:34,419 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-23 21:22:34,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:22:34,420 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-23 21:22:34,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:34,420 INFO L225 Difference]: With dead ends: 29 [2018-09-23 21:22:34,421 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 21:22:34,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:22:34,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 21:22:34,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 21:22:34,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 21:22:34,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-23 21:22:34,426 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-23 21:22:34,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:34,426 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-23 21:22:34,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 21:22:34,426 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-23 21:22:34,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 21:22:34,427 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:34,427 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-23 21:22:34,427 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:34,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:34,428 INFO L82 PathProgramCache]: Analyzing trace with hash 250956168, now seen corresponding path program 23 times [2018-09-23 21:22:34,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:34,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:34,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:34,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:34,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:34,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:34,877 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 [2018-09-23 21:22:34,889 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:34,956 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 21:22:34,957 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:34,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:35,000 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:35,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 21:22:35,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:22:35,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:22:35,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:22:35,001 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-23 21:22:35,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:35,058 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-23 21:22:35,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:22:35,059 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-23 21:22:35,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:35,059 INFO L225 Difference]: With dead ends: 30 [2018-09-23 21:22:35,059 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 21:22:35,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:22:35,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 21:22:35,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-23 21:22:35,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 21:22:35,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-23 21:22:35,065 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-23 21:22:35,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:35,065 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-23 21:22:35,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:22:35,065 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-23 21:22:35,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-23 21:22:35,066 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:35,066 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-23 21:22:35,066 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:35,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:35,067 INFO L82 PathProgramCache]: Analyzing trace with hash -810295359, now seen corresponding path program 24 times [2018-09-23 21:22:35,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:35,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:35,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:35,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:35,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:35,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:35,891 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 [2018-09-23 21:22:35,897 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:35,934 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 21:22:35,935 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:35,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:35,980 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:35,980 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 21:22:35,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 21:22:35,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 21:22:35,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:22:35,981 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-23 21:22:36,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:36,051 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-23 21:22:36,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:22:36,051 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-23 21:22:36,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:36,052 INFO L225 Difference]: With dead ends: 31 [2018-09-23 21:22:36,052 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 21:22:36,053 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:22:36,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 21:22:36,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 21:22:36,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 21:22:36,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-23 21:22:36,056 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-23 21:22:36,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:36,057 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-23 21:22:36,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 21:22:36,057 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-23 21:22:36,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 21:22:36,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:36,058 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-23 21:22:36,058 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:36,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:36,058 INFO L82 PathProgramCache]: Analyzing trace with hash 650645672, now seen corresponding path program 25 times [2018-09-23 21:22:36,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:36,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:36,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:36,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:36,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:36,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:36,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:36,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:36,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:36,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:36,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:36,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 21:22:36,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:22:36,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:22:36,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:22:36,779 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-23 21:22:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:36,849 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-23 21:22:36,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 21:22:36,850 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-23 21:22:36,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:36,850 INFO L225 Difference]: With dead ends: 32 [2018-09-23 21:22:36,850 INFO L226 Difference]: Without dead ends: 30 [2018-09-23 21:22:36,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:22:36,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-23 21:22:36,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-23 21:22:36,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 21:22:36,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-23 21:22:36,855 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-23 21:22:36,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:36,855 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-23 21:22:36,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:22:36,855 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-23 21:22:36,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 21:22:36,856 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:36,856 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-23 21:22:36,856 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:36,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:36,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1304822623, now seen corresponding path program 26 times [2018-09-23 21:22:36,857 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:36,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:36,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:36,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:36,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:37,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:37,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:37,723 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:37,740 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:37,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:37,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:37,773 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:37,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 21:22:37,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 21:22:37,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 21:22:37,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:22:37,775 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-23 21:22:37,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:37,929 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-23 21:22:37,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:22:37,930 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-23 21:22:37,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:37,931 INFO L225 Difference]: With dead ends: 33 [2018-09-23 21:22:37,931 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 21:22:37,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:22:37,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 21:22:37,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 21:22:37,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 21:22:37,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-23 21:22:37,936 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-23 21:22:37,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:37,936 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-23 21:22:37,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 21:22:37,936 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-23 21:22:37,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 21:22:37,937 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:37,937 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-23 21:22:37,937 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:37,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:37,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1794797624, now seen corresponding path program 27 times [2018-09-23 21:22:37,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:37,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:37,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:37,939 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:37,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:38,948 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:38,949 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 [2018-09-23 21:22:38,956 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:38,986 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-23 21:22:38,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:38,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:38,999 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:39,021 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:39,022 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 21:22:39,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:22:39,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:22:39,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:22:39,023 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-23 21:22:39,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:39,070 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-23 21:22:39,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 21:22:39,071 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-23 21:22:39,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:39,072 INFO L225 Difference]: With dead ends: 34 [2018-09-23 21:22:39,072 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 21:22:39,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:22:39,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 21:22:39,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-23 21:22:39,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 21:22:39,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-23 21:22:39,076 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-23 21:22:39,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:39,076 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-23 21:22:39,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:22:39,076 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-23 21:22:39,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-23 21:22:39,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:39,077 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-23 21:22:39,077 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:39,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:39,077 INFO L82 PathProgramCache]: Analyzing trace with hash 195846529, now seen corresponding path program 28 times [2018-09-23 21:22:39,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:39,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:39,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:39,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:39,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:39,472 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:39,472 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:39,484 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:39,502 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:39,503 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:39,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:39,515 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:39,538 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:39,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 21:22:39,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 21:22:39,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 21:22:39,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:22:39,539 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-23 21:22:39,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:39,595 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-23 21:22:39,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 21:22:39,595 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-23 21:22:39,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:39,596 INFO L225 Difference]: With dead ends: 35 [2018-09-23 21:22:39,596 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 21:22:39,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:22:39,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 21:22:39,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 21:22:39,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 21:22:39,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-23 21:22:39,601 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-23 21:22:39,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:39,601 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-23 21:22:39,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 21:22:39,601 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-23 21:22:39,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 21:22:39,602 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:39,602 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-23 21:22:39,602 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:39,602 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:39,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1776273128, now seen corresponding path program 29 times [2018-09-23 21:22:39,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:39,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:39,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:39,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:39,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:40,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:40,051 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:40,059 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:40,082 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-23 21:22:40,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:40,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:40,096 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:40,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:40,124 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 21:22:40,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:22:40,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:22:40,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:22:40,126 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-23 21:22:40,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:40,371 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-23 21:22:40,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:22:40,371 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-23 21:22:40,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:40,371 INFO L225 Difference]: With dead ends: 36 [2018-09-23 21:22:40,372 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 21:22:40,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:22:40,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 21:22:40,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-23 21:22:40,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 21:22:40,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-23 21:22:40,374 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-23 21:22:40,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:40,375 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-23 21:22:40,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:22:40,375 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-23 21:22:40,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 21:22:40,375 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:40,375 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-23 21:22:40,375 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:40,375 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:40,376 INFO L82 PathProgramCache]: Analyzing trace with hash -770109855, now seen corresponding path program 30 times [2018-09-23 21:22:40,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:40,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:40,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:40,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:40,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:41,548 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:41,549 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:41,549 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 [2018-09-23 21:22:41,569 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:41,602 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-23 21:22:41,603 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:41,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:41,646 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:41,646 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 21:22:41,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 21:22:41,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 21:22:41,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:22:41,647 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-23 21:22:41,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:41,788 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-23 21:22:41,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 21:22:41,788 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-23 21:22:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:41,789 INFO L225 Difference]: With dead ends: 37 [2018-09-23 21:22:41,789 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 21:22:41,790 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:22:41,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 21:22:41,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 21:22:41,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 21:22:41,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-23 21:22:41,792 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-23 21:22:41,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:41,792 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-23 21:22:41,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 21:22:41,792 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-23 21:22:41,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 21:22:41,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:41,792 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-23 21:22:41,793 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:41,793 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:41,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1896396296, now seen corresponding path program 31 times [2018-09-23 21:22:41,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:41,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:41,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:41,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:41,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:42,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:42,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:42,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:42,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:42,847 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:42,847 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 21:22:42,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 21:22:42,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 21:22:42,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:22:42,848 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-23 21:22:42,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:42,911 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-23 21:22:42,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:22:42,911 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-23 21:22:42,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:42,912 INFO L225 Difference]: With dead ends: 38 [2018-09-23 21:22:42,912 INFO L226 Difference]: Without dead ends: 36 [2018-09-23 21:22:42,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:22:42,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-23 21:22:42,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-23 21:22:42,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 21:22:42,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-23 21:22:42,917 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-23 21:22:42,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:42,917 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-23 21:22:42,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 21:22:42,917 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-23 21:22:42,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-23 21:22:42,918 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:42,918 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-23 21:22:42,918 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:42,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:42,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1341258943, now seen corresponding path program 32 times [2018-09-23 21:22:42,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:42,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:42,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:42,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:42,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:43,443 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:43,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:43,451 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:43,471 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:43,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:43,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:43,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:43,509 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 21:22:43,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 21:22:43,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 21:22:43,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:22:43,510 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-23 21:22:43,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:43,569 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-23 21:22:43,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 21:22:43,570 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-23 21:22:43,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:43,570 INFO L225 Difference]: With dead ends: 39 [2018-09-23 21:22:43,570 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 21:22:43,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:22:43,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 21:22:43,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 21:22:43,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 21:22:43,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-23 21:22:43,575 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-23 21:22:43,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:43,575 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-23 21:22:43,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 21:22:43,575 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-23 21:22:43,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 21:22:43,576 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:43,576 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-23 21:22:43,576 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:43,576 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:43,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1370643752, now seen corresponding path program 33 times [2018-09-23 21:22:43,576 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:43,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:43,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:43,577 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:43,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:45,065 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:45,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:45,076 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:45,104 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-23 21:22:45,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:45,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:45,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:45,148 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 21:22:45,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 21:22:45,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 21:22:45,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:22:45,149 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-23 21:22:45,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:45,282 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-23 21:22:45,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 21:22:45,283 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-23 21:22:45,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:45,283 INFO L225 Difference]: With dead ends: 40 [2018-09-23 21:22:45,283 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 21:22:45,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:22:45,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 21:22:45,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-23 21:22:45,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 21:22:45,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-23 21:22:45,287 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-23 21:22:45,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:45,287 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-23 21:22:45,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 21:22:45,287 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-23 21:22:45,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-23 21:22:45,287 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:45,288 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-23 21:22:45,288 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:45,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:45,288 INFO L82 PathProgramCache]: Analyzing trace with hash -459718623, now seen corresponding path program 34 times [2018-09-23 21:22:45,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:45,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:45,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:45,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:45,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:45,839 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:45,839 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 [2018-09-23 21:22:45,846 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:45,872 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:45,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:45,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:45,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:45,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 21:22:45,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 21:22:45,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 21:22:45,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:22:45,910 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-23 21:22:45,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:45,972 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-23 21:22:45,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 21:22:45,973 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-23 21:22:45,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:45,973 INFO L225 Difference]: With dead ends: 41 [2018-09-23 21:22:45,974 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 21:22:45,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:22:45,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 21:22:45,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 21:22:45,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 21:22:45,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-23 21:22:45,977 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-23 21:22:45,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:45,978 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-23 21:22:45,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 21:22:45,978 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-23 21:22:45,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 21:22:45,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:45,979 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-23 21:22:45,979 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:45,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:45,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1366377400, now seen corresponding path program 35 times [2018-09-23 21:22:45,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:45,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:45,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:45,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:45,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:46,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:46,632 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 [2018-09-23 21:22:46,639 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:46,682 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 21:22:46,683 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:46,684 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:46,716 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:46,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 21:22:46,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:22:46,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:22:46,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:22:46,718 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-23 21:22:46,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:46,847 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-23 21:22:46,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 21:22:46,847 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-23 21:22:46,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:46,848 INFO L225 Difference]: With dead ends: 42 [2018-09-23 21:22:46,848 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 21:22:46,849 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:22:46,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 21:22:46,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 21:22:46,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 21:22:46,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-23 21:22:46,851 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-23 21:22:46,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:46,851 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-23 21:22:46,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:22:46,851 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-23 21:22:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-23 21:22:46,852 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:46,852 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-23 21:22:46,852 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:46,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:46,852 INFO L82 PathProgramCache]: Analyzing trace with hash 591971585, now seen corresponding path program 36 times [2018-09-23 21:22:46,852 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:46,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:46,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:46,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:46,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:47,755 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:47,755 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 [2018-09-23 21:22:47,763 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:47,792 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 21:22:47,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:47,794 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:47,825 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:47,825 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 21:22:47,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 21:22:47,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 21:22:47,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:22:47,826 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-23 21:22:47,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:47,910 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-23 21:22:47,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 21:22:47,910 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-23 21:22:47,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:47,911 INFO L225 Difference]: With dead ends: 43 [2018-09-23 21:22:47,911 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 21:22:47,912 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:22:47,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 21:22:47,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 21:22:47,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 21:22:47,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-23 21:22:47,915 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-23 21:22:47,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:47,915 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-23 21:22:47,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 21:22:47,915 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-23 21:22:47,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 21:22:47,916 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:47,916 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-23 21:22:47,916 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:47,916 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:47,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1171247976, now seen corresponding path program 37 times [2018-09-23 21:22:47,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:47,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:47,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:47,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:47,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:48,535 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:48,535 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 [2018-09-23 21:22:48,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:48,565 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:48,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:48,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 21:22:48,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 21:22:48,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 21:22:48,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:22:48,597 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-23 21:22:48,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:48,667 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-23 21:22:48,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 21:22:48,667 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-23 21:22:48,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:48,668 INFO L225 Difference]: With dead ends: 44 [2018-09-23 21:22:48,668 INFO L226 Difference]: Without dead ends: 42 [2018-09-23 21:22:48,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:22:48,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-23 21:22:48,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-23 21:22:48,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-23 21:22:48,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-23 21:22:48,672 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-23 21:22:48,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:48,672 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-23 21:22:48,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 21:22:48,672 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-23 21:22:48,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-23 21:22:48,672 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:48,673 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-23 21:22:48,673 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:48,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:48,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1948946913, now seen corresponding path program 38 times [2018-09-23 21:22:48,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:48,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:48,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:48,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:48,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:48,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:49,556 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:49,557 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 [2018-09-23 21:22:49,564 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:49,586 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:49,586 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:49,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:49,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:49,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 21:22:49,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 21:22:49,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 21:22:49,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:22:49,626 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-23 21:22:49,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:49,694 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-23 21:22:49,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 21:22:49,695 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-23 21:22:49,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:49,696 INFO L225 Difference]: With dead ends: 45 [2018-09-23 21:22:49,696 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 21:22:49,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:22:49,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 21:22:49,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 21:22:49,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 21:22:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-23 21:22:49,700 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-23 21:22:49,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:49,700 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-23 21:22:49,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 21:22:49,700 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-23 21:22:49,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 21:22:49,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:49,701 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-23 21:22:49,701 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:49,701 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:49,701 INFO L82 PathProgramCache]: Analyzing trace with hash 287810184, now seen corresponding path program 39 times [2018-09-23 21:22:49,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:49,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:49,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:49,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:49,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:50,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:50,539 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 [2018-09-23 21:22:50,547 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:50,581 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-23 21:22:50,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:50,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:50,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:50,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 21:22:50,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 21:22:50,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 21:22:50,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:22:50,626 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-23 21:22:51,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:51,074 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-23 21:22:51,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 21:22:51,074 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-23 21:22:51,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:51,075 INFO L225 Difference]: With dead ends: 46 [2018-09-23 21:22:51,075 INFO L226 Difference]: Without dead ends: 44 [2018-09-23 21:22:51,076 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:22:51,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-23 21:22:51,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-23 21:22:51,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 21:22:51,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-23 21:22:51,078 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-23 21:22:51,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:51,078 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-23 21:22:51,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 21:22:51,078 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-23 21:22:51,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 21:22:51,079 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:51,079 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-23 21:22:51,079 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:51,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:51,079 INFO L82 PathProgramCache]: Analyzing trace with hash 332179137, now seen corresponding path program 40 times [2018-09-23 21:22:51,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:51,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:51,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:51,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:51,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:52,243 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:52,243 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:52,244 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 [2018-09-23 21:22:52,250 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:22:52,289 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:22:52,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:52,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:52,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:52,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 21:22:52,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 21:22:52,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 21:22:52,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:22:52,331 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-23 21:22:52,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:52,447 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-23 21:22:52,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 21:22:52,448 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-23 21:22:52,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:52,449 INFO L225 Difference]: With dead ends: 47 [2018-09-23 21:22:52,449 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 21:22:52,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:22:52,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 21:22:52,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 21:22:52,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 21:22:52,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-23 21:22:52,452 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-23 21:22:52,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:52,452 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-23 21:22:52,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 21:22:52,453 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-23 21:22:52,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 21:22:52,453 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:52,453 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-23 21:22:52,453 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:52,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:52,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1707616680, now seen corresponding path program 41 times [2018-09-23 21:22:52,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:52,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:52,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:52,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:52,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:53,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:53,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:53,283 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:22:53,318 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-23 21:22:53,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:53,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:53,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:53,357 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 21:22:53,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 21:22:53,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 21:22:53,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:22:53,358 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-23 21:22:53,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:53,429 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-23 21:22:53,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 21:22:53,430 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-23 21:22:53,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:53,430 INFO L225 Difference]: With dead ends: 48 [2018-09-23 21:22:53,431 INFO L226 Difference]: Without dead ends: 46 [2018-09-23 21:22:53,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:22:53,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-23 21:22:53,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-23 21:22:53,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 21:22:53,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-23 21:22:53,434 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-23 21:22:53,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:53,435 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-23 21:22:53,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 21:22:53,435 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-23 21:22:53,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-23 21:22:53,435 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:53,435 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-23 21:22:53,435 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:53,436 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:53,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1396507553, now seen corresponding path program 42 times [2018-09-23 21:22:53,436 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:53,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:53,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:53,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:53,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:54,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:54,229 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 [2018-09-23 21:22:54,236 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:22:54,272 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-23 21:22:54,272 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:54,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:54,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:54,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 21:22:54,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 21:22:54,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 21:22:54,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:22:54,310 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-23 21:22:54,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:54,391 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-23 21:22:54,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 21:22:54,391 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-23 21:22:54,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:54,392 INFO L225 Difference]: With dead ends: 49 [2018-09-23 21:22:54,392 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 21:22:54,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:22:54,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 21:22:54,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 21:22:54,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 21:22:54,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-23 21:22:54,396 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-23 21:22:54,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:54,397 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-23 21:22:54,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 21:22:54,397 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-23 21:22:54,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 21:22:54,397 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:54,398 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-23 21:22:54,398 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:54,398 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:54,398 INFO L82 PathProgramCache]: Analyzing trace with hash 342059208, now seen corresponding path program 43 times [2018-09-23 21:22:54,398 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:54,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:54,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:54,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:54,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:55,287 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:55,287 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:55,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:55,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:55,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:55,331 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:55,352 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:55,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 21:22:55,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 21:22:55,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 21:22:55,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:22:55,354 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-23 21:22:55,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:55,427 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-23 21:22:55,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 21:22:55,428 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-23 21:22:55,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:55,429 INFO L225 Difference]: With dead ends: 50 [2018-09-23 21:22:55,429 INFO L226 Difference]: Without dead ends: 48 [2018-09-23 21:22:55,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:22:55,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-23 21:22:55,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-23 21:22:55,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-23 21:22:55,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-23 21:22:55,432 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-23 21:22:55,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:55,433 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-23 21:22:55,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 21:22:55,433 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-23 21:22:55,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-23 21:22:55,433 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:55,433 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-23 21:22:55,434 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:55,434 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:55,434 INFO L82 PathProgramCache]: Analyzing trace with hash 2013898881, now seen corresponding path program 44 times [2018-09-23 21:22:55,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:55,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:55,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:55,435 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:55,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:56,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:56,428 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 [2018-09-23 21:22:56,437 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:56,467 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:56,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:56,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:56,481 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:56,502 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:56,502 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 21:22:56,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 21:22:56,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 21:22:56,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:22:56,503 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-23 21:22:56,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:56,650 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-23 21:22:56,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 21:22:56,651 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-23 21:22:56,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:56,652 INFO L225 Difference]: With dead ends: 51 [2018-09-23 21:22:56,652 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 21:22:56,652 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:22:56,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 21:22:56,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 21:22:56,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 21:22:56,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-23 21:22:56,656 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-23 21:22:56,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:56,656 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-23 21:22:56,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 21:22:56,656 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-23 21:22:56,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 21:22:56,657 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:56,657 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-23 21:22:56,657 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:56,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:56,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1993646104, now seen corresponding path program 45 times [2018-09-23 21:22:56,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:56,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:56,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:56,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:56,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:57,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:57,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:57,923 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:57,932 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:57,966 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-23 21:22:57,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:57,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:58,005 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:58,005 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 21:22:58,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 21:22:58,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 21:22:58,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:22:58,006 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-23 21:22:58,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:58,395 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-23 21:22:58,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:22:58,396 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-23 21:22:58,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:58,396 INFO L225 Difference]: With dead ends: 52 [2018-09-23 21:22:58,397 INFO L226 Difference]: Without dead ends: 50 [2018-09-23 21:22:58,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:22:58,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-23 21:22:58,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-23 21:22:58,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 21:22:58,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-23 21:22:58,400 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-23 21:22:58,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:58,400 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-23 21:22:58,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 21:22:58,400 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-23 21:22:58,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-23 21:22:58,400 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:58,400 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-23 21:22:58,401 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:58,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:58,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1673489055, now seen corresponding path program 46 times [2018-09-23 21:22:58,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:58,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:58,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:58,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:58,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:59,972 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:59,972 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:22:59,980 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:00,006 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:00,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:00,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:00,050 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:00,050 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 21:23:00,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 21:23:00,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 21:23:00,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:23:00,051 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-23 21:23:00,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:00,135 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-23 21:23:00,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 21:23:00,135 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-23 21:23:00,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:00,136 INFO L225 Difference]: With dead ends: 53 [2018-09-23 21:23:00,137 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 21:23:00,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:23:00,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 21:23:00,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 21:23:00,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 21:23:00,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-23 21:23:00,140 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-23 21:23:00,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:00,140 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-23 21:23:00,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 21:23:00,140 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-23 21:23:00,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 21:23:00,141 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:00,141 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-23 21:23:00,141 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:00,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:00,142 INFO L82 PathProgramCache]: Analyzing trace with hash -338555128, now seen corresponding path program 47 times [2018-09-23 21:23:00,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:00,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:00,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:00,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:00,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:01,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:01,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:01,354 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:01,391 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 21:23:01,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:01,393 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:01,436 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:01,437 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 21:23:01,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 21:23:01,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 21:23:01,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:23:01,438 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-23 21:23:01,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:01,535 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-23 21:23:01,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 21:23:01,535 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-23 21:23:01,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:01,536 INFO L225 Difference]: With dead ends: 54 [2018-09-23 21:23:01,537 INFO L226 Difference]: Without dead ends: 52 [2018-09-23 21:23:01,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:23:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-23 21:23:01,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-23 21:23:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-23 21:23:01,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-23 21:23:01,540 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-23 21:23:01,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:01,540 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-23 21:23:01,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 21:23:01,540 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-23 21:23:01,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-23 21:23:01,541 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:01,541 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-23 21:23:01,541 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:01,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:01,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1905276351, now seen corresponding path program 48 times [2018-09-23 21:23:01,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:01,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:01,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:01,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:01,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:02,862 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:02,862 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 [2018-09-23 21:23:02,881 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:02,934 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 21:23:02,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:02,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:02,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:02,968 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:02,968 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 21:23:02,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 21:23:02,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 21:23:02,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:23:02,969 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-23 21:23:03,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:03,066 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-23 21:23:03,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 21:23:03,067 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-23 21:23:03,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:03,067 INFO L225 Difference]: With dead ends: 55 [2018-09-23 21:23:03,068 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 21:23:03,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:23:03,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 21:23:03,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 21:23:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 21:23:03,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-23 21:23:03,072 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-23 21:23:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:03,072 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-23 21:23:03,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 21:23:03,072 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-23 21:23:03,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 21:23:03,073 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:03,073 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-23 21:23:03,073 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:03,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:03,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1065973288, now seen corresponding path program 49 times [2018-09-23 21:23:03,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:03,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:03,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:03,074 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:03,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:03,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:04,097 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:04,097 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 [2018-09-23 21:23:04,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:04,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:04,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:04,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 21:23:04,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 21:23:04,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 21:23:04,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:23:04,167 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-23 21:23:04,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:04,254 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-23 21:23:04,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 21:23:04,255 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-23 21:23:04,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:04,255 INFO L225 Difference]: With dead ends: 56 [2018-09-23 21:23:04,256 INFO L226 Difference]: Without dead ends: 54 [2018-09-23 21:23:04,256 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:23:04,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-23 21:23:04,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-23 21:23:04,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 21:23:04,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-23 21:23:04,259 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-23 21:23:04,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:04,259 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-23 21:23:04,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 21:23:04,259 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-23 21:23:04,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 21:23:04,259 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:04,259 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-23 21:23:04,260 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:04,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:04,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1314568415, now seen corresponding path program 50 times [2018-09-23 21:23:04,260 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:04,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:04,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:04,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:04,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:05,305 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:05,305 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:05,313 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:05,342 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:05,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:05,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:05,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:05,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 21:23:05,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 21:23:05,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 21:23:05,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:23:05,388 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-23 21:23:05,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:05,486 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-23 21:23:05,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 21:23:05,486 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-23 21:23:05,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:05,487 INFO L225 Difference]: With dead ends: 57 [2018-09-23 21:23:05,487 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 21:23:05,488 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:23:05,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 21:23:05,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 21:23:05,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 21:23:05,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-23 21:23:05,490 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-23 21:23:05,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:05,490 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-23 21:23:05,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 21:23:05,490 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-23 21:23:05,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 21:23:05,491 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:05,491 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-23 21:23:05,491 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:05,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:05,492 INFO L82 PathProgramCache]: Analyzing trace with hash -2096917176, now seen corresponding path program 51 times [2018-09-23 21:23:05,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:05,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:05,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:05,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:05,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:06,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:06,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:06,694 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 [2018-09-23 21:23:06,701 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:06,741 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-23 21:23:06,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:06,743 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:06,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:06,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 21:23:06,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 21:23:06,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 21:23:06,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:23:06,789 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-23 21:23:07,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:07,224 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-23 21:23:07,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 21:23:07,224 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-23 21:23:07,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:07,225 INFO L225 Difference]: With dead ends: 58 [2018-09-23 21:23:07,225 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 21:23:07,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:23:07,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 21:23:07,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-23 21:23:07,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 21:23:07,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-23 21:23:07,228 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-23 21:23:07,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:07,228 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-23 21:23:07,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 21:23:07,229 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-23 21:23:07,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-23 21:23:07,229 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:07,229 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-23 21:23:07,229 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:07,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:07,230 INFO L82 PathProgramCache]: Analyzing trace with hash -579924991, now seen corresponding path program 52 times [2018-09-23 21:23:07,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:07,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:07,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:07,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:07,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:08,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:08,644 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 [2018-09-23 21:23:08,651 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:08,681 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:08,681 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:08,683 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:08,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:08,719 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 21:23:08,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 21:23:08,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 21:23:08,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:23:08,721 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-23 21:23:08,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:08,838 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-23 21:23:08,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 21:23:08,838 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-23 21:23:08,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:08,839 INFO L225 Difference]: With dead ends: 59 [2018-09-23 21:23:08,839 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 21:23:08,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:23:08,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 21:23:08,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 21:23:08,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 21:23:08,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-23 21:23:08,843 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-23 21:23:08,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:08,843 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-23 21:23:08,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 21:23:08,843 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-23 21:23:08,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 21:23:08,844 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:08,844 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-23 21:23:08,844 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:08,844 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:08,845 INFO L82 PathProgramCache]: Analyzing trace with hash -797807512, now seen corresponding path program 53 times [2018-09-23 21:23:08,845 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:08,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:08,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:08,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:08,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:09,982 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:09,982 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 [2018-09-23 21:23:09,990 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:10,030 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-23 21:23:10,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:10,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:10,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:10,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:10,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 21:23:10,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 21:23:10,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 21:23:10,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:23:10,064 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-23 21:23:10,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:10,136 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-23 21:23:10,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 21:23:10,136 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-23 21:23:10,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:10,137 INFO L225 Difference]: With dead ends: 60 [2018-09-23 21:23:10,138 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 21:23:10,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:23:10,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 21:23:10,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-23 21:23:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-23 21:23:10,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-23 21:23:10,141 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-23 21:23:10,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:10,142 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-23 21:23:10,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 21:23:10,142 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-23 21:23:10,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-23 21:23:10,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:10,142 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-23 21:23:10,143 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:10,143 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:10,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1037768929, now seen corresponding path program 54 times [2018-09-23 21:23:10,143 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:10,143 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:10,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:10,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:10,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:10,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:11,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:11,500 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:11,500 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 [2018-09-23 21:23:11,507 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:11,549 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-23 21:23:11,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:11,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:11,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:11,594 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:11,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 21:23:11,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 21:23:11,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 21:23:11,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:23:11,597 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-23 21:23:11,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:11,751 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-23 21:23:11,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 21:23:11,751 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-23 21:23:11,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:11,752 INFO L225 Difference]: With dead ends: 61 [2018-09-23 21:23:11,752 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 21:23:11,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:23:11,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 21:23:11,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 21:23:11,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 21:23:11,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-23 21:23:11,755 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-23 21:23:11,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:11,755 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-23 21:23:11,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 21:23:11,755 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-23 21:23:11,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 21:23:11,756 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:11,756 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-23 21:23:11,756 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:11,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:11,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2106063752, now seen corresponding path program 55 times [2018-09-23 21:23:11,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:11,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:11,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:11,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:11,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:13,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:13,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:13,235 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 [2018-09-23 21:23:13,243 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:13,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:13,307 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:13,307 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 21:23:13,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 21:23:13,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 21:23:13,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:23:13,308 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-23 21:23:13,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:13,407 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-23 21:23:13,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 21:23:13,407 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-23 21:23:13,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:13,408 INFO L225 Difference]: With dead ends: 62 [2018-09-23 21:23:13,408 INFO L226 Difference]: Without dead ends: 60 [2018-09-23 21:23:13,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:23:13,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-23 21:23:13,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-23 21:23:13,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-23 21:23:13,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-23 21:23:13,410 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-23 21:23:13,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:13,411 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-23 21:23:13,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 21:23:13,411 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-23 21:23:13,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-23 21:23:13,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:13,412 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-23 21:23:13,413 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:13,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:13,413 INFO L82 PathProgramCache]: Analyzing trace with hash 863464897, now seen corresponding path program 56 times [2018-09-23 21:23:13,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:13,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:13,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:13,414 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:13,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:14,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:14,710 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:14,710 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:14,720 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:14,750 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:14,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:14,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:14,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:14,782 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 21:23:14,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 21:23:14,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 21:23:14,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:23:14,784 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-23 21:23:14,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:14,885 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-23 21:23:14,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 21:23:14,886 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-23 21:23:14,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:14,886 INFO L225 Difference]: With dead ends: 63 [2018-09-23 21:23:14,887 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 21:23:14,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:23:14,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 21:23:14,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 21:23:14,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 21:23:14,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-23 21:23:14,889 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-23 21:23:14,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:14,889 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-23 21:23:14,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 21:23:14,890 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-23 21:23:14,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 21:23:14,890 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:14,890 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-23 21:23:14,890 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:14,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:14,891 INFO L82 PathProgramCache]: Analyzing trace with hash 997606056, now seen corresponding path program 57 times [2018-09-23 21:23:14,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:14,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:14,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:14,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:14,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:16,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:16,205 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 [2018-09-23 21:23:16,211 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:16,256 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-23 21:23:16,257 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:16,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:16,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:16,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-23 21:23:16,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 21:23:16,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 21:23:16,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:23:16,301 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-23 21:23:16,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:16,420 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-23 21:23:16,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 21:23:16,421 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-23 21:23:16,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:16,422 INFO L225 Difference]: With dead ends: 64 [2018-09-23 21:23:16,422 INFO L226 Difference]: Without dead ends: 62 [2018-09-23 21:23:16,422 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:23:16,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-23 21:23:16,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-23 21:23:16,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-23 21:23:16,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-23 21:23:16,425 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-23 21:23:16,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:16,426 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-23 21:23:16,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 21:23:16,426 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-23 21:23:16,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-23 21:23:16,427 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:16,427 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-23 21:23:16,427 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:16,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:16,427 INFO L82 PathProgramCache]: Analyzing trace with hash 861014689, now seen corresponding path program 58 times [2018-09-23 21:23:16,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:16,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:16,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:16,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:16,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:18,053 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:18,053 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 [2018-09-23 21:23:18,063 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:18,094 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:18,095 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:18,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:18,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:18,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-23 21:23:18,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 21:23:18,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 21:23:18,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:23:18,129 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-23 21:23:18,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:18,232 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-23 21:23:18,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 21:23:18,232 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-23 21:23:18,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:18,233 INFO L225 Difference]: With dead ends: 65 [2018-09-23 21:23:18,233 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 21:23:18,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:23:18,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 21:23:18,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 21:23:18,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 21:23:18,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-23 21:23:18,237 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-23 21:23:18,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:18,237 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-23 21:23:18,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 21:23:18,238 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-23 21:23:18,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 21:23:18,238 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:18,238 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-23 21:23:18,238 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:18,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:18,239 INFO L82 PathProgramCache]: Analyzing trace with hash 921649608, now seen corresponding path program 59 times [2018-09-23 21:23:18,239 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:18,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:18,239 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:18,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:18,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:19,967 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:19,967 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 [2018-09-23 21:23:19,974 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:20,019 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-23 21:23:20,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:20,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:20,057 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:20,057 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 21:23:20,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 21:23:20,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 21:23:20,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:23:20,058 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-23 21:23:20,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:20,206 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-23 21:23:20,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 21:23:20,207 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-23 21:23:20,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:20,208 INFO L225 Difference]: With dead ends: 66 [2018-09-23 21:23:20,208 INFO L226 Difference]: Without dead ends: 64 [2018-09-23 21:23:20,208 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:23:20,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-23 21:23:20,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-23 21:23:20,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 21:23:20,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-23 21:23:20,210 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-23 21:23:20,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:20,210 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-23 21:23:20,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 21:23:20,210 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-23 21:23:20,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-23 21:23:20,211 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:20,211 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-23 21:23:20,211 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:20,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:20,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1493635199, now seen corresponding path program 60 times [2018-09-23 21:23:20,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:20,212 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:20,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:20,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:20,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:22,149 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:22,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:22,159 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:22,205 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 21:23:22,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:22,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:22,254 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:22,254 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-23 21:23:22,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 21:23:22,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 21:23:22,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 21:23:22,256 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-23 21:23:22,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:22,377 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-23 21:23:22,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 21:23:22,378 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-23 21:23:22,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:22,379 INFO L225 Difference]: With dead ends: 67 [2018-09-23 21:23:22,379 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 21:23:22,379 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 21:23:22,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 21:23:22,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 21:23:22,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 21:23:22,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-23 21:23:22,382 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-23 21:23:22,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:22,383 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-23 21:23:22,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 21:23:22,383 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-23 21:23:22,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 21:23:22,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:22,383 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-23 21:23:22,384 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:22,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:22,384 INFO L82 PathProgramCache]: Analyzing trace with hash 941947112, now seen corresponding path program 61 times [2018-09-23 21:23:22,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:22,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:22,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:22,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:22,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:22,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:24,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:24,361 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 [2018-09-23 21:23:24,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:24,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:24,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:24,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:24,435 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 21:23:24,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 21:23:24,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 21:23:24,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:23:24,436 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-23 21:23:24,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:24,526 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-23 21:23:24,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 21:23:24,527 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-23 21:23:24,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:24,528 INFO L225 Difference]: With dead ends: 68 [2018-09-23 21:23:24,528 INFO L226 Difference]: Without dead ends: 66 [2018-09-23 21:23:24,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:23:24,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-23 21:23:24,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-23 21:23:24,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-23 21:23:24,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-23 21:23:24,531 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-23 21:23:24,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:24,531 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-23 21:23:24,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 21:23:24,531 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-23 21:23:24,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-23 21:23:24,531 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:24,532 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-23 21:23:24,532 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:24,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:24,532 INFO L82 PathProgramCache]: Analyzing trace with hash -864412575, now seen corresponding path program 62 times [2018-09-23 21:23:24,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:24,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:24,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:24,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:24,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:26,019 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:26,019 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:26,027 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:26,078 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:26,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:26,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:26,121 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:26,121 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-23 21:23:26,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 21:23:26,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 21:23:26,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:23:26,123 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-23 21:23:26,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:26,278 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-23 21:23:26,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 21:23:26,278 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-23 21:23:26,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:26,279 INFO L225 Difference]: With dead ends: 69 [2018-09-23 21:23:26,279 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 21:23:26,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:23:26,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 21:23:26,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 21:23:26,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 21:23:26,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-23 21:23:26,282 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-23 21:23:26,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:26,282 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-23 21:23:26,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 21:23:26,283 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-23 21:23:26,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 21:23:26,283 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:26,283 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-23 21:23:26,283 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:26,283 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:26,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1026988024, now seen corresponding path program 63 times [2018-09-23 21:23:26,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:26,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:26,284 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:26,284 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:26,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:28,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:28,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:28,272 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:28,325 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-23 21:23:28,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:28,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:28,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:28,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-23 21:23:28,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 21:23:28,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 21:23:28,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:23:28,362 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-23 21:23:28,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:28,468 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-23 21:23:28,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 21:23:28,477 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-23 21:23:28,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:28,477 INFO L225 Difference]: With dead ends: 70 [2018-09-23 21:23:28,477 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 21:23:28,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:23:28,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 21:23:28,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-23 21:23:28,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-23 21:23:28,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-23 21:23:28,480 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-23 21:23:28,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:28,480 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-23 21:23:28,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 21:23:28,481 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-23 21:23:28,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-23 21:23:28,481 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:28,481 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-23 21:23:28,481 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:28,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:28,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1771859647, now seen corresponding path program 64 times [2018-09-23 21:23:28,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:28,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:28,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:28,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:28,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:30,063 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:30,063 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 [2018-09-23 21:23:30,072 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:30,111 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:30,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:30,113 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:30,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:30,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:30,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-23 21:23:30,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 21:23:30,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 21:23:30,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 21:23:30,160 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-23 21:23:30,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:30,340 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-23 21:23:30,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 21:23:30,341 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-23 21:23:30,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:30,342 INFO L225 Difference]: With dead ends: 71 [2018-09-23 21:23:30,342 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 21:23:30,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 21:23:30,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 21:23:30,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 21:23:30,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 21:23:30,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-23 21:23:30,346 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-23 21:23:30,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:30,347 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-23 21:23:30,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 21:23:30,347 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-23 21:23:30,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 21:23:30,347 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:30,347 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-23 21:23:30,347 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:30,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:30,348 INFO L82 PathProgramCache]: Analyzing trace with hash 906923816, now seen corresponding path program 65 times [2018-09-23 21:23:30,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:30,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:30,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:30,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:30,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:31,948 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:31,948 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:31,955 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:32,007 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-23 21:23:32,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:32,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:32,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:32,056 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:32,056 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 21:23:32,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 21:23:32,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 21:23:32,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:23:32,058 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-23 21:23:32,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:32,445 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-23 21:23:32,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 21:23:32,445 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-23 21:23:32,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:32,446 INFO L225 Difference]: With dead ends: 72 [2018-09-23 21:23:32,446 INFO L226 Difference]: Without dead ends: 70 [2018-09-23 21:23:32,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:23:32,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-23 21:23:32,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-23 21:23:32,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 21:23:32,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-23 21:23:32,450 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-23 21:23:32,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:32,450 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-23 21:23:32,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 21:23:32,451 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-23 21:23:32,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-23 21:23:32,451 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:32,451 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-23 21:23:32,451 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:32,451 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:32,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1950134751, now seen corresponding path program 66 times [2018-09-23 21:23:32,452 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:32,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:32,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:32,452 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:32,452 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:34,444 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:34,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:34,452 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:34,506 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-23 21:23:34,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:34,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:34,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:34,556 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-23 21:23:34,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 21:23:34,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 21:23:34,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:23:34,557 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-23 21:23:34,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:34,657 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-23 21:23:34,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 21:23:34,658 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-23 21:23:34,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:34,659 INFO L225 Difference]: With dead ends: 73 [2018-09-23 21:23:34,659 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 21:23:34,659 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:23:34,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 21:23:34,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-23 21:23:34,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 21:23:34,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-23 21:23:34,662 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-23 21:23:34,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:34,662 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-23 21:23:34,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 21:23:34,663 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-23 21:23:34,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 21:23:34,663 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:34,663 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-23 21:23:34,663 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:34,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:34,665 INFO L82 PathProgramCache]: Analyzing trace with hash -324637112, now seen corresponding path program 67 times [2018-09-23 21:23:34,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:34,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:34,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:34,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:34,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:34,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:36,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:36,352 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 [2018-09-23 21:23:36,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:36,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:36,431 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:36,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 21:23:36,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 21:23:36,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 21:23:36,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:23:36,432 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-23 21:23:36,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:36,549 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-23 21:23:36,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 21:23:36,549 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-23 21:23:36,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:36,550 INFO L225 Difference]: With dead ends: 74 [2018-09-23 21:23:36,551 INFO L226 Difference]: Without dead ends: 72 [2018-09-23 21:23:36,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:23:36,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-23 21:23:36,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-23 21:23:36,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-23 21:23:36,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-23 21:23:36,554 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-23 21:23:36,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:36,554 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-23 21:23:36,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 21:23:36,554 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-23 21:23:36,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-23 21:23:36,555 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:36,555 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-23 21:23:36,555 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:36,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:36,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1473817855, now seen corresponding path program 68 times [2018-09-23 21:23:36,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:36,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:36,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:36,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:36,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:38,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:38,685 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:38,685 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 [2018-09-23 21:23:38,694 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:38,732 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:38,732 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:38,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:38,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:38,766 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-23 21:23:38,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 21:23:38,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 21:23:38,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:23:38,767 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-23 21:23:38,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:38,961 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-23 21:23:38,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 21:23:38,962 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-23 21:23:38,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:38,963 INFO L225 Difference]: With dead ends: 75 [2018-09-23 21:23:38,963 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 21:23:38,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:23:38,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 21:23:38,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 21:23:38,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 21:23:38,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-23 21:23:38,967 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-23 21:23:38,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:38,967 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-23 21:23:38,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 21:23:38,967 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-23 21:23:38,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 21:23:38,968 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:38,968 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-23 21:23:38,968 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:38,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:38,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1556284776, now seen corresponding path program 69 times [2018-09-23 21:23:38,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:38,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:38,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:38,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:38,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:40,769 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:40,770 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 [2018-09-23 21:23:40,777 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:40,895 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-23 21:23:40,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:40,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:40,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:40,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-23 21:23:40,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 21:23:40,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 21:23:40,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:23:40,932 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-23 21:23:41,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:41,061 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-23 21:23:41,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 21:23:41,061 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-23 21:23:41,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:41,062 INFO L225 Difference]: With dead ends: 76 [2018-09-23 21:23:41,062 INFO L226 Difference]: Without dead ends: 74 [2018-09-23 21:23:41,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:23:41,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-23 21:23:41,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-23 21:23:41,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-23 21:23:41,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-23 21:23:41,067 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-23 21:23:41,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:41,067 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-23 21:23:41,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 21:23:41,068 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-23 21:23:41,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-23 21:23:41,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:41,068 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-23 21:23:41,068 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:41,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:41,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1000185825, now seen corresponding path program 70 times [2018-09-23 21:23:41,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:41,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:41,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:41,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:41,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:43,115 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:43,115 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 [2018-09-23 21:23:43,123 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:23:43,169 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:23:43,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:43,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:43,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:43,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:43,216 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-23 21:23:43,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-23 21:23:43,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-23 21:23:43,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 21:23:43,217 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-23 21:23:43,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:43,483 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-23 21:23:43,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 21:23:43,484 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-23 21:23:43,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:43,485 INFO L225 Difference]: With dead ends: 77 [2018-09-23 21:23:43,485 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 21:23:43,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 21:23:43,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 21:23:43,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-23 21:23:43,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 21:23:43,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-23 21:23:43,489 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-23 21:23:43,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:43,489 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-23 21:23:43,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-23 21:23:43,489 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-23 21:23:43,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 21:23:43,490 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:43,490 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-23 21:23:43,490 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:43,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:43,490 INFO L82 PathProgramCache]: Analyzing trace with hash 940987528, now seen corresponding path program 71 times [2018-09-23 21:23:43,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:43,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:43,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:43,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:43,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:45,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:45,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:45,489 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:23:45,896 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-23 21:23:45,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:45,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:45,947 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:45,947 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-23 21:23:45,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 21:23:45,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 21:23:45,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:23:45,949 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-23 21:23:46,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:46,289 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-23 21:23:46,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 21:23:46,290 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-23 21:23:46,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:46,291 INFO L225 Difference]: With dead ends: 78 [2018-09-23 21:23:46,291 INFO L226 Difference]: Without dead ends: 76 [2018-09-23 21:23:46,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:23:46,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-23 21:23:46,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-23 21:23:46,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-23 21:23:46,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-23 21:23:46,295 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-23 21:23:46,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:46,295 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-23 21:23:46,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 21:23:46,296 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-23 21:23:46,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-23 21:23:46,296 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:46,296 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-23 21:23:46,297 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:46,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:46,297 INFO L82 PathProgramCache]: Analyzing trace with hash -894159679, now seen corresponding path program 72 times [2018-09-23 21:23:46,297 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:46,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:46,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:46,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:46,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:48,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:48,772 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 [2018-09-23 21:23:48,779 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:23:48,835 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 21:23:48,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:48,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:48,885 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:48,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-23 21:23:48,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-23 21:23:48,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-23 21:23:48,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 21:23:48,887 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-09-23 21:23:48,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:48,992 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-23 21:23:48,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 21:23:48,993 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-09-23 21:23:48,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:48,993 INFO L225 Difference]: With dead ends: 79 [2018-09-23 21:23:48,994 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 21:23:48,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 21:23:48,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 21:23:48,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 21:23:48,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 21:23:48,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-23 21:23:48,997 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-23 21:23:48,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:48,998 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-23 21:23:48,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-23 21:23:48,998 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-23 21:23:48,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 21:23:48,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:48,998 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-23 21:23:48,999 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:48,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:48,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1949148248, now seen corresponding path program 73 times [2018-09-23 21:23:48,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:48,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:48,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:49,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:49,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:52,006 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:52,006 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 [2018-09-23 21:23:52,013 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:52,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:52,091 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:52,091 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-23 21:23:52,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 21:23:52,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 21:23:52,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:23:52,092 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-09-23 21:23:52,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:52,242 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-23 21:23:52,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 21:23:52,243 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-09-23 21:23:52,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:52,244 INFO L225 Difference]: With dead ends: 80 [2018-09-23 21:23:52,244 INFO L226 Difference]: Without dead ends: 78 [2018-09-23 21:23:52,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:23:52,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-23 21:23:52,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-23 21:23:52,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-23 21:23:52,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-23 21:23:52,247 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-23 21:23:52,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:52,247 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-23 21:23:52,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 21:23:52,248 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-23 21:23:52,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-23 21:23:52,248 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:52,248 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-23 21:23:52,248 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:52,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:52,248 INFO L82 PathProgramCache]: Analyzing trace with hash -294055519, now seen corresponding path program 74 times [2018-09-23 21:23:52,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:52,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:52,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:52,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:23:52,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:54,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:54,520 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:54,520 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:54,527 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:23:54,571 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:23:54,571 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:54,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:54,612 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:54,612 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-23 21:23:54,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 21:23:54,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 21:23:54,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 21:23:54,614 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-09-23 21:23:54,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:54,774 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-23 21:23:54,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 21:23:54,775 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-09-23 21:23:54,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:54,775 INFO L225 Difference]: With dead ends: 81 [2018-09-23 21:23:54,776 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 21:23:54,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 21:23:54,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 21:23:54,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 21:23:54,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 21:23:54,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-23 21:23:54,778 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-23 21:23:54,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:54,779 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-23 21:23:54,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 21:23:54,779 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-23 21:23:54,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 21:23:54,779 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:54,780 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-23 21:23:54,780 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:54,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:54,780 INFO L82 PathProgramCache]: Analyzing trace with hash -525788472, now seen corresponding path program 75 times [2018-09-23 21:23:54,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:54,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:54,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:54,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:54,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:23:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:57,780 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:23:57,780 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:23:57,788 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:23:57,849 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-23 21:23:57,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:23:57,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:23:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:23:57,888 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:23:57,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-23 21:23:57,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 21:23:57,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 21:23:57,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:23:57,890 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-09-23 21:23:58,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:23:58,475 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-23 21:23:58,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 21:23:58,476 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-23 21:23:58,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:23:58,476 INFO L225 Difference]: With dead ends: 82 [2018-09-23 21:23:58,476 INFO L226 Difference]: Without dead ends: 80 [2018-09-23 21:23:58,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:23:58,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-23 21:23:58,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-23 21:23:58,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-23 21:23:58,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-23 21:23:58,479 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-23 21:23:58,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:23:58,479 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-23 21:23:58,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 21:23:58,479 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-23 21:23:58,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-23 21:23:58,479 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:23:58,479 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-23 21:23:58,480 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:23:58,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:23:58,480 INFO L82 PathProgramCache]: Analyzing trace with hash 880424577, now seen corresponding path program 76 times [2018-09-23 21:23:58,480 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:23:58,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:23:58,480 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:58,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:23:58,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:23:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:00,886 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:00,887 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 [2018-09-23 21:24:00,894 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:24:00,946 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:24:00,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:00,949 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:00,999 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:00,999 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-23 21:24:00,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-23 21:24:01,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-23 21:24:01,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 21:24:01,001 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-09-23 21:24:01,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:01,600 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-23 21:24:01,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 21:24:01,601 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-09-23 21:24:01,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:01,601 INFO L225 Difference]: With dead ends: 83 [2018-09-23 21:24:01,602 INFO L226 Difference]: Without dead ends: 81 [2018-09-23 21:24:01,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 21:24:01,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-23 21:24:01,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-23 21:24:01,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 21:24:01,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-23 21:24:01,605 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-23 21:24:01,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:01,605 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-23 21:24:01,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-23 21:24:01,606 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-23 21:24:01,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 21:24:01,606 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:01,606 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-23 21:24:01,606 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:01,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:01,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1523356136, now seen corresponding path program 77 times [2018-09-23 21:24:01,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:01,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:01,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:01,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:01,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:04,811 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:04,811 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 [2018-09-23 21:24:04,819 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:24:04,890 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-23 21:24:04,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:04,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:04,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:04,940 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:04,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-23 21:24:04,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 21:24:04,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 21:24:04,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:24:04,941 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-09-23 21:24:05,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:05,072 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-23 21:24:05,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 21:24:05,072 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-09-23 21:24:05,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:05,073 INFO L225 Difference]: With dead ends: 84 [2018-09-23 21:24:05,073 INFO L226 Difference]: Without dead ends: 82 [2018-09-23 21:24:05,074 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:24:05,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-23 21:24:05,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-23 21:24:05,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-23 21:24:05,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-23 21:24:05,077 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-23 21:24:05,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:05,077 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-23 21:24:05,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 21:24:05,078 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-23 21:24:05,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-23 21:24:05,078 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:05,078 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-23 21:24:05,079 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:05,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:05,079 INFO L82 PathProgramCache]: Analyzing trace with hash -20602015, now seen corresponding path program 78 times [2018-09-23 21:24:05,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:05,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:05,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:05,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:05,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:08,233 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:08,233 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 [2018-09-23 21:24:08,240 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:24:08,663 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-23 21:24:08,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:08,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:08,719 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:08,720 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-23 21:24:08,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-23 21:24:08,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-23 21:24:08,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 21:24:08,721 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-09-23 21:24:09,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:09,030 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-23 21:24:09,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 21:24:09,030 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-09-23 21:24:09,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:09,031 INFO L225 Difference]: With dead ends: 85 [2018-09-23 21:24:09,031 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 21:24:09,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 21:24:09,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 21:24:09,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 21:24:09,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 21:24:09,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-23 21:24:09,034 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-23 21:24:09,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:09,034 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-23 21:24:09,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-23 21:24:09,035 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-23 21:24:09,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 21:24:09,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:09,035 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-23 21:24:09,036 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:09,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:09,036 INFO L82 PathProgramCache]: Analyzing trace with hash -638664440, now seen corresponding path program 79 times [2018-09-23 21:24:09,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:09,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:09,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:09,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:09,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:11,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:11,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:11,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:24:11,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:11,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:11,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:11,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-23 21:24:11,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 21:24:11,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 21:24:11,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:24:11,623 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-09-23 21:24:11,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:11,783 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-23 21:24:11,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 21:24:11,784 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-23 21:24:11,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:11,785 INFO L225 Difference]: With dead ends: 86 [2018-09-23 21:24:11,785 INFO L226 Difference]: Without dead ends: 84 [2018-09-23 21:24:11,786 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:24:11,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-23 21:24:11,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-23 21:24:11,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-23 21:24:11,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-23 21:24:11,789 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-23 21:24:11,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:11,790 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-23 21:24:11,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 21:24:11,790 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-23 21:24:11,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-23 21:24:11,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:11,791 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-23 21:24:11,791 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:11,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:11,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1676236865, now seen corresponding path program 80 times [2018-09-23 21:24:11,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:11,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:11,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:11,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:11,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:14,387 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:14,387 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:24:14,395 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:24:14,438 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:24:14,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:14,441 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:14,494 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:14,495 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-23 21:24:14,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-23 21:24:14,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-23 21:24:14,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 21:24:14,496 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-09-23 21:24:15,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:15,880 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-23 21:24:15,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 21:24:15,881 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-09-23 21:24:15,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:15,882 INFO L225 Difference]: With dead ends: 87 [2018-09-23 21:24:15,882 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 21:24:15,882 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 21:24:15,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 21:24:15,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 21:24:15,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 21:24:15,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-23 21:24:15,885 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-23 21:24:15,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:15,885 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-23 21:24:15,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-23 21:24:15,885 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-23 21:24:15,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 21:24:15,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:15,886 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-23 21:24:15,886 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:15,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:15,886 INFO L82 PathProgramCache]: Analyzing trace with hash 423733288, now seen corresponding path program 81 times [2018-09-23 21:24:15,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:15,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:15,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:15,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:15,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:18,281 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:18,281 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 [2018-09-23 21:24:18,288 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:24:18,354 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-23 21:24:18,354 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:18,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:18,408 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:18,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-23 21:24:18,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 21:24:18,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 21:24:18,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:24:18,410 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-09-23 21:24:18,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:18,719 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-23 21:24:18,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-23 21:24:18,719 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-09-23 21:24:18,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:18,720 INFO L225 Difference]: With dead ends: 88 [2018-09-23 21:24:18,720 INFO L226 Difference]: Without dead ends: 86 [2018-09-23 21:24:18,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:24:18,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-23 21:24:18,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-23 21:24:18,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-23 21:24:18,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-23 21:24:18,723 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-23 21:24:18,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:18,724 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-23 21:24:18,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 21:24:18,724 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-23 21:24:18,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-23 21:24:18,725 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:18,725 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-23 21:24:18,725 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:18,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:18,725 INFO L82 PathProgramCache]: Analyzing trace with hash 250828065, now seen corresponding path program 82 times [2018-09-23 21:24:18,726 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:18,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:18,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:18,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:18,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:21,452 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:21,452 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 [2018-09-23 21:24:21,461 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:24:21,506 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:24:21,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:21,509 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:21,561 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:21,561 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-23 21:24:21,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-23 21:24:21,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-23 21:24:21,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 21:24:21,563 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-09-23 21:24:22,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:22,905 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-23 21:24:22,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-23 21:24:22,906 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-09-23 21:24:22,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:22,906 INFO L225 Difference]: With dead ends: 89 [2018-09-23 21:24:22,906 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 21:24:22,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 21:24:22,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 21:24:22,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-23 21:24:22,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-23 21:24:22,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-23 21:24:22,910 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-23 21:24:22,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:22,910 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-23 21:24:22,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-23 21:24:22,911 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-23 21:24:22,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 21:24:22,911 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:22,911 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-23 21:24:22,912 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:22,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:22,912 INFO L82 PathProgramCache]: Analyzing trace with hash -814266552, now seen corresponding path program 83 times [2018-09-23 21:24:22,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:22,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:22,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:22,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:22,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:22,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:26,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:26,087 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 [2018-09-23 21:24:26,094 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:24:26,168 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-23 21:24:26,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:26,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:26,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:26,219 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:26,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-23 21:24:26,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 21:24:26,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 21:24:26,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 21:24:26,221 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-09-23 21:24:26,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:26,520 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-23 21:24:26,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-23 21:24:26,521 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-23 21:24:26,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:26,522 INFO L225 Difference]: With dead ends: 90 [2018-09-23 21:24:26,522 INFO L226 Difference]: Without dead ends: 88 [2018-09-23 21:24:26,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 21:24:26,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-23 21:24:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-23 21:24:26,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-23 21:24:26,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-23 21:24:26,525 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-23 21:24:26,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:26,525 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-23 21:24:26,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 21:24:26,525 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-23 21:24:26,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-23 21:24:26,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:26,526 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-23 21:24:26,526 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:26,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:26,526 INFO L82 PathProgramCache]: Analyzing trace with hash 527538689, now seen corresponding path program 84 times [2018-09-23 21:24:26,526 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:26,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:26,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:26,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:26,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:29,270 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:29,270 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 [2018-09-23 21:24:29,279 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:24:29,357 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-23 21:24:29,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:29,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:29,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:29,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:29,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-23 21:24:29,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-23 21:24:29,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-23 21:24:29,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 21:24:29,415 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-09-23 21:24:29,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:29,702 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-23 21:24:29,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-23 21:24:29,703 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-09-23 21:24:29,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:29,704 INFO L225 Difference]: With dead ends: 91 [2018-09-23 21:24:29,704 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 21:24:29,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 21:24:29,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 21:24:29,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-23 21:24:29,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 21:24:29,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-23 21:24:29,707 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-23 21:24:29,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:29,708 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-23 21:24:29,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-23 21:24:29,708 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-23 21:24:29,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 21:24:29,708 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:29,708 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-23 21:24:29,709 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:29,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:29,709 INFO L82 PathProgramCache]: Analyzing trace with hash -826171800, now seen corresponding path program 85 times [2018-09-23 21:24:29,709 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:29,709 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:29,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:29,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:29,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:32,405 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:32,405 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 [2018-09-23 21:24:32,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:32,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:32,492 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:32,493 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-23 21:24:32,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 21:24:32,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 21:24:32,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 21:24:32,495 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-09-23 21:24:32,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:32,631 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-23 21:24:32,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-23 21:24:32,632 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-09-23 21:24:32,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:32,633 INFO L225 Difference]: With dead ends: 92 [2018-09-23 21:24:32,633 INFO L226 Difference]: Without dead ends: 90 [2018-09-23 21:24:32,634 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 21:24:32,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-23 21:24:32,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-23 21:24:32,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-23 21:24:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-23 21:24:32,636 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-23 21:24:32,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:32,637 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-23 21:24:32,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 21:24:32,637 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-23 21:24:32,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-23 21:24:32,637 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:32,638 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-23 21:24:32,638 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:32,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:32,638 INFO L82 PathProgramCache]: Analyzing trace with hash 158476001, now seen corresponding path program 86 times [2018-09-23 21:24:32,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:32,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:32,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:32,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:32,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:35,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:35,569 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 [2018-09-23 21:24:35,576 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:24:35,620 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:24:35,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:35,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:35,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:35,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-23 21:24:35,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-23 21:24:35,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-23 21:24:35,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 21:24:35,657 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-09-23 21:24:35,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:35,850 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-23 21:24:35,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 21:24:35,850 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-09-23 21:24:35,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:35,851 INFO L225 Difference]: With dead ends: 93 [2018-09-23 21:24:35,851 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 21:24:35,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 21:24:35,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 21:24:35,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 21:24:35,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 21:24:35,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-23 21:24:35,855 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-23 21:24:35,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:35,855 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-23 21:24:35,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-23 21:24:35,855 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-23 21:24:35,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 21:24:35,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:35,856 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-23 21:24:35,856 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:35,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:35,856 INFO L82 PathProgramCache]: Analyzing trace with hash 617786760, now seen corresponding path program 87 times [2018-09-23 21:24:35,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:35,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:35,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:35,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:35,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:35,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:38,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:38,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:38,690 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:24:38,700 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:24:38,774 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-23 21:24:38,774 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:38,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:38,818 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:38,819 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-23 21:24:38,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 21:24:38,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 21:24:38,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:24:38,820 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-09-23 21:24:39,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:39,013 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-23 21:24:39,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-23 21:24:39,014 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-23 21:24:39,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:39,015 INFO L225 Difference]: With dead ends: 94 [2018-09-23 21:24:39,015 INFO L226 Difference]: Without dead ends: 92 [2018-09-23 21:24:39,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:24:39,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-23 21:24:39,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-23 21:24:39,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-23 21:24:39,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-23 21:24:39,018 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-23 21:24:39,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:39,018 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-23 21:24:39,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 21:24:39,018 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-23 21:24:39,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-23 21:24:39,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:39,019 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-23 21:24:39,019 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:39,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:39,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1971518401, now seen corresponding path program 88 times [2018-09-23 21:24:39,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:39,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:39,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:39,020 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:39,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:42,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:42,361 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 [2018-09-23 21:24:42,369 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:24:42,414 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:24:42,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:42,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:42,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:42,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-23 21:24:42,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-23 21:24:42,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-23 21:24:42,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 21:24:42,469 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-09-23 21:24:42,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:42,605 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-23 21:24:42,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-23 21:24:42,605 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-09-23 21:24:42,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:42,606 INFO L225 Difference]: With dead ends: 95 [2018-09-23 21:24:42,606 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 21:24:42,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 21:24:42,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 21:24:42,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-23 21:24:42,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-23 21:24:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-23 21:24:42,610 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-23 21:24:42,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:42,610 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-23 21:24:42,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-23 21:24:42,610 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-23 21:24:42,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 21:24:42,611 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:42,611 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-23 21:24:42,611 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:42,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:42,611 INFO L82 PathProgramCache]: Analyzing trace with hash 987526312, now seen corresponding path program 89 times [2018-09-23 21:24:42,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:42,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:42,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:42,612 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:42,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:45,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:45,822 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 [2018-09-23 21:24:45,830 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:24:45,910 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-23 21:24:45,910 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:45,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:45,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:45,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-23 21:24:45,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 21:24:45,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 21:24:45,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 21:24:45,953 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-09-23 21:24:46,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:46,144 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-23 21:24:46,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-23 21:24:46,144 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-09-23 21:24:46,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:46,145 INFO L225 Difference]: With dead ends: 96 [2018-09-23 21:24:46,145 INFO L226 Difference]: Without dead ends: 94 [2018-09-23 21:24:46,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 21:24:46,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-23 21:24:46,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-23 21:24:46,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-23 21:24:46,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-23 21:24:46,149 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-23 21:24:46,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:46,149 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-23 21:24:46,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 21:24:46,149 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-23 21:24:46,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-23 21:24:46,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:46,149 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-23 21:24:46,150 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:46,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:46,150 INFO L82 PathProgramCache]: Analyzing trace with hash 548542625, now seen corresponding path program 90 times [2018-09-23 21:24:46,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:46,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:46,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:46,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:46,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:49,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:49,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:24:49,072 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:24:49,145 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-23 21:24:49,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:49,148 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:49,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:49,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-23 21:24:49,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-23 21:24:49,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-23 21:24:49,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 21:24:49,186 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-09-23 21:24:49,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:49,399 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-23 21:24:49,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-23 21:24:49,400 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-09-23 21:24:49,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:49,401 INFO L225 Difference]: With dead ends: 97 [2018-09-23 21:24:49,401 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 21:24:49,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 21:24:49,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 21:24:49,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-23 21:24:49,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 21:24:49,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-23 21:24:49,404 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-23 21:24:49,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:49,404 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-23 21:24:49,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-23 21:24:49,404 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-23 21:24:49,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 21:24:49,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:49,405 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-23 21:24:49,405 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:49,405 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:49,405 INFO L82 PathProgramCache]: Analyzing trace with hash -175049784, now seen corresponding path program 91 times [2018-09-23 21:24:49,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:49,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:49,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:49,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:49,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:52,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:52,734 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 [2018-09-23 21:24:52,741 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:52,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:52,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:52,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-23 21:24:52,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 21:24:52,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 21:24:52,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 21:24:52,829 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-09-23 21:24:53,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:53,019 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-23 21:24:53,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-23 21:24:53,019 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-23 21:24:53,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:53,020 INFO L225 Difference]: With dead ends: 98 [2018-09-23 21:24:53,020 INFO L226 Difference]: Without dead ends: 96 [2018-09-23 21:24:53,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 21:24:53,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-23 21:24:53,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-23 21:24:53,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-23 21:24:53,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-23 21:24:53,023 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-23 21:24:53,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:53,023 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-23 21:24:53,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 21:24:53,023 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-23 21:24:53,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-23 21:24:53,024 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:53,024 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-23 21:24:53,024 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:53,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:53,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1131577983, now seen corresponding path program 92 times [2018-09-23 21:24:53,024 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:53,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:53,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:53,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:24:53,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:24:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:56,361 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:24:56,361 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 [2018-09-23 21:24:56,367 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:24:56,415 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:24:56,416 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:24:56,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:24:56,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:24:56,455 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:24:56,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-23 21:24:56,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-23 21:24:56,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-23 21:24:56,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 21:24:56,457 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-09-23 21:24:56,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:24:56,633 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-23 21:24:56,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-23 21:24:56,633 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-09-23 21:24:56,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:24:56,634 INFO L225 Difference]: With dead ends: 99 [2018-09-23 21:24:56,634 INFO L226 Difference]: Without dead ends: 97 [2018-09-23 21:24:56,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 21:24:56,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-23 21:24:56,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-23 21:24:56,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 21:24:56,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-23 21:24:56,636 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-23 21:24:56,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:24:56,637 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-23 21:24:56,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-23 21:24:56,637 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-23 21:24:56,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-23 21:24:56,637 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:24:56,637 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-23 21:24:56,638 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:24:56,638 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:24:56,638 INFO L82 PathProgramCache]: Analyzing trace with hash -719181080, now seen corresponding path program 93 times [2018-09-23 21:24:56,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:24:56,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:24:56,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:56,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:24:56,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:24:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:00,667 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:00,667 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 [2018-09-23 21:25:00,673 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:25:00,754 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-23 21:25:00,754 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:00,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:00,811 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:00,811 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-23 21:25:00,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 21:25:00,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 21:25:00,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 21:25:00,814 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-09-23 21:25:01,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:01,056 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-23 21:25:01,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-23 21:25:01,057 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-09-23 21:25:01,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:01,058 INFO L225 Difference]: With dead ends: 100 [2018-09-23 21:25:01,058 INFO L226 Difference]: Without dead ends: 98 [2018-09-23 21:25:01,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 21:25:01,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-23 21:25:01,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-23 21:25:01,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-23 21:25:01,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-23 21:25:01,061 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-23 21:25:01,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:01,061 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-23 21:25:01,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 21:25:01,061 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-23 21:25:01,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-23 21:25:01,062 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:01,062 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-23 21:25:01,062 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:01,062 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:01,062 INFO L82 PathProgramCache]: Analyzing trace with hash -819778975, now seen corresponding path program 94 times [2018-09-23 21:25:01,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:01,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:01,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:01,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:01,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:04,251 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:04,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:25:04,258 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:25:04,304 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:25:04,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:04,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:04,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:04,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-23 21:25:04,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-23 21:25:04,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-23 21:25:04,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 21:25:04,362 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-09-23 21:25:04,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:04,551 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-23 21:25:04,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-23 21:25:04,551 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-09-23 21:25:04,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:04,552 INFO L225 Difference]: With dead ends: 101 [2018-09-23 21:25:04,552 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 21:25:04,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 21:25:04,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 21:25:04,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-23 21:25:04,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 21:25:04,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-23 21:25:04,555 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-23 21:25:04,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:04,555 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-23 21:25:04,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-23 21:25:04,556 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-23 21:25:04,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 21:25:04,556 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:04,556 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-23 21:25:04,557 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:04,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:04,557 INFO L82 PathProgramCache]: Analyzing trace with hash 356653576, now seen corresponding path program 95 times [2018-09-23 21:25:04,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:04,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:04,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:04,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:04,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:08,071 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:08,071 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 [2018-09-23 21:25:08,078 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:25:08,162 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-23 21:25:08,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:08,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:08,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:08,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-23 21:25:08,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 21:25:08,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 21:25:08,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:25:08,205 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-09-23 21:25:08,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:08,828 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-23 21:25:08,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-23 21:25:08,828 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-23 21:25:08,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:08,829 INFO L225 Difference]: With dead ends: 102 [2018-09-23 21:25:08,829 INFO L226 Difference]: Without dead ends: 100 [2018-09-23 21:25:08,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:25:08,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-23 21:25:08,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-23 21:25:08,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-23 21:25:08,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-23 21:25:08,833 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-23 21:25:08,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:08,833 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-23 21:25:08,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 21:25:08,833 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-23 21:25:08,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-23 21:25:08,834 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:08,834 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-23 21:25:08,834 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:08,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:08,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1828643007, now seen corresponding path program 96 times [2018-09-23 21:25:08,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:08,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:08,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:08,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:08,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:12,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:12,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:12,428 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 [2018-09-23 21:25:12,436 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:25:12,518 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-23 21:25:12,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:12,521 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:12,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:12,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-23 21:25:12,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-23 21:25:12,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-23 21:25:12,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 21:25:12,561 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-09-23 21:25:12,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:12,811 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-23 21:25:12,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-23 21:25:12,812 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-09-23 21:25:12,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:12,813 INFO L225 Difference]: With dead ends: 103 [2018-09-23 21:25:12,813 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 21:25:12,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 21:25:12,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 21:25:12,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 21:25:12,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 21:25:12,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-23 21:25:12,817 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-23 21:25:12,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:12,817 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-23 21:25:12,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-23 21:25:12,818 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-23 21:25:12,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 21:25:12,818 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:12,818 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-23 21:25:12,818 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:12,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:12,818 INFO L82 PathProgramCache]: Analyzing trace with hash -853360344, now seen corresponding path program 97 times [2018-09-23 21:25:12,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:12,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:12,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:12,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:12,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:16,510 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:16,510 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 [2018-09-23 21:25:16,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:16,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:16,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:16,606 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:16,606 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-23 21:25:16,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-23 21:25:16,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-23 21:25:16,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 21:25:16,607 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-09-23 21:25:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:16,843 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-23 21:25:16,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-23 21:25:16,843 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-09-23 21:25:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:16,844 INFO L225 Difference]: With dead ends: 104 [2018-09-23 21:25:16,844 INFO L226 Difference]: Without dead ends: 102 [2018-09-23 21:25:16,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 21:25:16,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-23 21:25:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-23 21:25:16,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-23 21:25:16,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-23 21:25:16,848 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-23 21:25:16,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:16,848 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-23 21:25:16,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-23 21:25:16,848 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-23 21:25:16,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-23 21:25:16,848 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:16,848 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-23 21:25:16,849 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:16,849 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:16,849 INFO L82 PathProgramCache]: Analyzing trace with hash -684368863, now seen corresponding path program 98 times [2018-09-23 21:25:16,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:16,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:16,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:16,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:16,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:20,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:20,219 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 [2018-09-23 21:25:20,226 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:25:20,277 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:25:20,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:20,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:20,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:20,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-23 21:25:20,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-23 21:25:20,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-23 21:25:20,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 21:25:20,319 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-09-23 21:25:20,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:20,597 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-23 21:25:20,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-23 21:25:20,598 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-09-23 21:25:20,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:20,598 INFO L225 Difference]: With dead ends: 105 [2018-09-23 21:25:20,598 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 21:25:20,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 21:25:20,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 21:25:20,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-23 21:25:20,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 21:25:20,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-23 21:25:20,601 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-23 21:25:20,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:20,601 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-23 21:25:20,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-23 21:25:20,601 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-23 21:25:20,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 21:25:20,602 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:20,602 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-23 21:25:20,602 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:20,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:20,603 INFO L82 PathProgramCache]: Analyzing trace with hash 259399752, now seen corresponding path program 99 times [2018-09-23 21:25:20,603 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:20,603 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:20,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:20,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:20,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:24,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:24,132 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:24,132 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:25:24,139 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:25:24,226 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-23 21:25:24,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:24,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:24,267 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:24,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-23 21:25:24,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-23 21:25:24,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-23 21:25:24,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 21:25:24,269 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-09-23 21:25:24,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:24,519 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-23 21:25:24,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-23 21:25:24,519 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-23 21:25:24,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:24,520 INFO L225 Difference]: With dead ends: 106 [2018-09-23 21:25:24,520 INFO L226 Difference]: Without dead ends: 104 [2018-09-23 21:25:24,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 21:25:24,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-23 21:25:24,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-23 21:25:24,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-23 21:25:24,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-23 21:25:24,523 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-23 21:25:24,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:24,523 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-23 21:25:24,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-23 21:25:24,524 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-23 21:25:24,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-23 21:25:24,524 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:24,525 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-23 21:25:24,525 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:24,525 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:24,525 INFO L82 PathProgramCache]: Analyzing trace with hash -548544255, now seen corresponding path program 100 times [2018-09-23 21:25:24,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:24,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:24,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:24,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:24,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:28,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:28,432 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 [2018-09-23 21:25:28,439 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:25:28,490 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:25:28,490 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:28,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:28,531 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:28,531 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-23 21:25:28,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-23 21:25:28,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-23 21:25:28,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 21:25:28,533 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-09-23 21:25:28,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:28,717 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-23 21:25:28,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-23 21:25:28,717 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-09-23 21:25:28,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:28,718 INFO L225 Difference]: With dead ends: 107 [2018-09-23 21:25:28,718 INFO L226 Difference]: Without dead ends: 105 [2018-09-23 21:25:28,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 21:25:28,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-23 21:25:28,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-23 21:25:28,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-23 21:25:28,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-23 21:25:28,721 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-23 21:25:28,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:28,721 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-23 21:25:28,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-23 21:25:28,722 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-23 21:25:28,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 21:25:28,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:28,722 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-23 21:25:28,723 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:28,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:28,723 INFO L82 PathProgramCache]: Analyzing trace with hash 174995304, now seen corresponding path program 101 times [2018-09-23 21:25:28,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:28,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:28,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:28,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:28,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:32,725 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:32,725 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 [2018-09-23 21:25:32,733 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:25:32,834 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-23 21:25:32,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:32,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:32,876 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:32,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-23 21:25:32,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-23 21:25:32,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-23 21:25:32,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 21:25:32,878 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-09-23 21:25:33,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:33,089 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-23 21:25:33,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-23 21:25:33,089 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-09-23 21:25:33,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:33,090 INFO L225 Difference]: With dead ends: 108 [2018-09-23 21:25:33,091 INFO L226 Difference]: Without dead ends: 106 [2018-09-23 21:25:33,091 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 21:25:33,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-23 21:25:33,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-23 21:25:33,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-23 21:25:33,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-23 21:25:33,094 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-23 21:25:33,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:33,094 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-23 21:25:33,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-23 21:25:33,094 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-23 21:25:33,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-23 21:25:33,095 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:33,095 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-23 21:25:33,095 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:33,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:33,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1129885153, now seen corresponding path program 102 times [2018-09-23 21:25:33,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:33,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:33,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:33,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:33,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:37,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:37,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:37,123 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:25:37,133 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:25:37,223 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-23 21:25:37,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:37,226 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:37,243 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:37,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:37,264 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-23 21:25:37,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-23 21:25:37,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-23 21:25:37,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-23 21:25:37,265 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-09-23 21:25:37,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:37,529 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-23 21:25:37,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-23 21:25:37,530 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-09-23 21:25:37,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:37,531 INFO L225 Difference]: With dead ends: 109 [2018-09-23 21:25:37,531 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 21:25:37,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-23 21:25:37,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 21:25:37,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-23 21:25:37,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 21:25:37,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-23 21:25:37,534 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-23 21:25:37,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:37,534 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-23 21:25:37,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-23 21:25:37,534 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-23 21:25:37,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 21:25:37,535 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:37,535 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-23 21:25:37,535 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:37,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:37,536 INFO L82 PathProgramCache]: Analyzing trace with hash 666699400, now seen corresponding path program 103 times [2018-09-23 21:25:37,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:37,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:37,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:37,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:37,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:37,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:41,623 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:41,623 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-23 21:25:41,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:41,686 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:41,735 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:41,735 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-23 21:25:41,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-23 21:25:41,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-23 21:25:41,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 21:25:41,737 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-09-23 21:25:42,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:42,031 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-23 21:25:42,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-23 21:25:42,033 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-23 21:25:42,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:42,033 INFO L225 Difference]: With dead ends: 110 [2018-09-23 21:25:42,033 INFO L226 Difference]: Without dead ends: 108 [2018-09-23 21:25:42,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 21:25:42,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-23 21:25:42,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-23 21:25:42,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-23 21:25:42,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-23 21:25:42,037 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-23 21:25:42,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:42,037 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-23 21:25:42,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-23 21:25:42,037 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-23 21:25:42,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-23 21:25:42,038 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:42,038 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-23 21:25:42,038 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:42,039 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:42,039 INFO L82 PathProgramCache]: Analyzing trace with hash -807157055, now seen corresponding path program 104 times [2018-09-23 21:25:42,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:42,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:42,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:42,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:25:42,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:46,229 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:46,229 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:46,236 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:25:46,287 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:25:46,287 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:46,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:46,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:46,338 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:46,338 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-23 21:25:46,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-23 21:25:46,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-23 21:25:46,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 21:25:46,339 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-09-23 21:25:46,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:46,514 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-23 21:25:46,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-23 21:25:46,514 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-09-23 21:25:46,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:46,515 INFO L225 Difference]: With dead ends: 111 [2018-09-23 21:25:46,515 INFO L226 Difference]: Without dead ends: 109 [2018-09-23 21:25:46,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 21:25:46,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-23 21:25:46,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-23 21:25:46,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 21:25:46,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-23 21:25:46,518 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-23 21:25:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:46,519 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-23 21:25:46,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-23 21:25:46,519 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-23 21:25:46,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 21:25:46,519 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:46,519 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-23 21:25:46,520 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:46,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:46,520 INFO L82 PathProgramCache]: Analyzing trace with hash 747933096, now seen corresponding path program 105 times [2018-09-23 21:25:46,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:46,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:46,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:46,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:46,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:50,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:50,386 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:50,392 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:25:50,486 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-23 21:25:50,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:50,489 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:50,528 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:50,528 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-23 21:25:50,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-23 21:25:50,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-23 21:25:50,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 21:25:50,530 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-09-23 21:25:50,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:50,813 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-23 21:25:50,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-23 21:25:50,814 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-09-23 21:25:50,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:50,814 INFO L225 Difference]: With dead ends: 112 [2018-09-23 21:25:50,815 INFO L226 Difference]: Without dead ends: 110 [2018-09-23 21:25:50,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 21:25:50,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-23 21:25:50,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-23 21:25:50,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-23 21:25:50,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-23 21:25:50,817 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-23 21:25:50,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:50,817 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-23 21:25:50,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-23 21:25:50,817 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-23 21:25:50,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-23 21:25:50,818 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:50,818 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-23 21:25:50,818 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:50,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:50,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1711087521, now seen corresponding path program 106 times [2018-09-23 21:25:50,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:50,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:50,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:50,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:50,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:55,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:55,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:55,159 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:25:55,213 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:25:55,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:55,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:55,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:25:55,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-23 21:25:55,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-23 21:25:55,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-23 21:25:55,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-23 21:25:55,258 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-09-23 21:25:55,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:25:55,580 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-23 21:25:55,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-23 21:25:55,580 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-09-23 21:25:55,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:25:55,581 INFO L225 Difference]: With dead ends: 113 [2018-09-23 21:25:55,581 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 21:25:55,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-23 21:25:55,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 21:25:55,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-23 21:25:55,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-23 21:25:55,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-23 21:25:55,585 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-23 21:25:55,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:25:55,585 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-23 21:25:55,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-23 21:25:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-23 21:25:55,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 21:25:55,586 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:25:55,586 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-23 21:25:55,586 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:25:55,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:25:55,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1504103624, now seen corresponding path program 107 times [2018-09-23 21:25:55,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:25:55,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:25:55,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:55,587 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:25:55,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:25:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:25:59,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:25:59,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:25:59,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:25:59,854 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:25:59,959 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-23 21:25:59,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:25:59,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:25:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:00,004 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:00,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-23 21:26:00,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-23 21:26:00,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-23 21:26:00,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 21:26:00,005 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-09-23 21:26:00,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:00,287 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-23 21:26:00,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-23 21:26:00,287 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-23 21:26:00,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:00,288 INFO L225 Difference]: With dead ends: 114 [2018-09-23 21:26:00,288 INFO L226 Difference]: Without dead ends: 112 [2018-09-23 21:26:00,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 21:26:00,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-23 21:26:00,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-23 21:26:00,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-23 21:26:00,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-23 21:26:00,291 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-23 21:26:00,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:00,292 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-23 21:26:00,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-23 21:26:00,292 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-23 21:26:00,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-23 21:26:00,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:00,292 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-09-23 21:26:00,293 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:00,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:00,293 INFO L82 PathProgramCache]: Analyzing trace with hash -617429887, now seen corresponding path program 108 times [2018-09-23 21:26:00,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:00,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:00,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:00,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:00,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:04,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:04,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:04,633 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:26:04,731 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-23 21:26:04,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:04,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:04,776 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:04,776 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-23 21:26:04,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-23 21:26:04,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-23 21:26:04,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-23 21:26:04,778 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-09-23 21:26:05,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:05,063 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-23 21:26:05,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-23 21:26:05,064 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-09-23 21:26:05,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:05,065 INFO L225 Difference]: With dead ends: 115 [2018-09-23 21:26:05,065 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 21:26:05,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-23 21:26:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 21:26:05,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-23 21:26:05,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-23 21:26:05,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-23 21:26:05,067 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-23 21:26:05,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:05,067 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-23 21:26:05,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-23 21:26:05,067 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-23 21:26:05,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-23 21:26:05,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:05,068 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-09-23 21:26:05,068 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:05,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:05,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1960459288, now seen corresponding path program 109 times [2018-09-23 21:26:05,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:05,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:05,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:05,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:05,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:09,469 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:09,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:09,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:09,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:09,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:09,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:09,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-23 21:26:09,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-23 21:26:09,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-23 21:26:09,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 21:26:09,578 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-09-23 21:26:09,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:09,831 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-09-23 21:26:09,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-23 21:26:09,832 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-09-23 21:26:09,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:09,833 INFO L225 Difference]: With dead ends: 116 [2018-09-23 21:26:09,833 INFO L226 Difference]: Without dead ends: 114 [2018-09-23 21:26:09,834 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 21:26:09,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-23 21:26:09,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-23 21:26:09,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-23 21:26:09,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-23 21:26:09,837 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-09-23 21:26:09,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:09,837 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-23 21:26:09,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-23 21:26:09,838 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-23 21:26:09,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-23 21:26:09,838 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:09,838 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-09-23 21:26:09,838 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:09,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:09,839 INFO L82 PathProgramCache]: Analyzing trace with hash -644697759, now seen corresponding path program 110 times [2018-09-23 21:26:09,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:09,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:09,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:09,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:26:09,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:26:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:14,497 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:26:14,497 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:26:14,504 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:26:14,560 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:26:14,561 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:26:14,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:26:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:26:14,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:26:14,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-23 21:26:14,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-23 21:26:14,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-23 21:26:14,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-23 21:26:14,607 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-09-23 21:26:14,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:26:14,905 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-23 21:26:14,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-23 21:26:14,905 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-09-23 21:26:14,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:26:14,906 INFO L225 Difference]: With dead ends: 117 [2018-09-23 21:26:14,906 INFO L226 Difference]: Without dead ends: 115 [2018-09-23 21:26:14,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-23 21:26:14,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-23 21:26:14,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-23 21:26:14,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-23 21:26:14,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-23 21:26:14,910 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-09-23 21:26:14,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:26:14,911 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-23 21:26:14,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-23 21:26:14,911 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-23 21:26:14,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-23 21:26:14,911 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:26:14,911 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-09-23 21:26:14,912 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:26:14,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:26:14,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1489203976, now seen corresponding path program 111 times [2018-09-23 21:26:14,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:26:14,912 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:26:14,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:14,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:26:14,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:26:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 21:26:16,052 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 21:26:16,056 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 21:26:16,057 INFO L202 PluginConnector]: Adding new model overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 09:26:16 BoogieIcfgContainer [2018-09-23 21:26:16,057 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 21:26:16,058 INFO L168 Benchmark]: Toolchain (without parser) took 232610.75 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -70.8 MB). Free memory was 1.5 GB in the beginning and 1.2 GB in the end (delta: 248.8 MB). Peak memory consumption was 178.0 MB. Max. memory is 7.1 GB. [2018-09-23 21:26:16,059 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 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. [2018-09-23 21:26:16,059 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.85 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. [2018-09-23 21:26:16,059 INFO L168 Benchmark]: Boogie Preprocessor took 23.90 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. [2018-09-23 21:26:16,059 INFO L168 Benchmark]: RCFGBuilder took 262.44 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. [2018-09-23 21:26:16,060 INFO L168 Benchmark]: TraceAbstraction took 232276.76 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -70.8 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 227.7 MB). Peak memory consumption was 156.9 MB. Max. memory is 7.1 GB. [2018-09-23 21:26:16,062 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 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.85 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.90 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 262.44 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 232276.76 ms. Allocated memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: -70.8 MB). Free memory was 1.4 GB in the beginning and 1.2 GB in the end (delta: 227.7 MB). Peak memory consumption was 156.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 31). Cancelled while BasicCegarLoop was analyzing trace of length 115 with TraceHistMax 111, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 55 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 232.1s OverallTime, 112 OverallIterations, 111 TraceHistogramMax, 21.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 333 SDtfs, 0 SDslu, 4870 SDs, 0 SdLazy, 11197 SolverSat, 164 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12652 GetRequests, 6436 SyntacticMatches, 0 SemanticMatches, 6216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 193.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=111, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 111 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.4s SsaConstructionTime, 5.9s SatisfiabilityAnalysisTime, 197.6s InterpolantComputationTime, 12873 NumberOfCodeBlocks, 12873 NumberOfCodeBlocksAsserted, 1779 NumberOfCheckSat, 12652 ConstructedInterpolants, 0 QuantifiedInterpolants, 2822278 SizeOfPredicates, 110 NumberOfNonLiveVariables, 26400 ConjunctsInSsa, 6325 ConjunctsInUnsatCore, 221 InterpolantComputations, 1 PerfectInterpolantSequences, 0/455840 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/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_21-26-16-070.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/overflow1.i_3.bplTransformedIcfg_BEv2_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_21-26-16-070.csv Completed graceful shutdown