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/functions1.i_3.bplTransformedIcfg_BEv2_8.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 08:39:12,949 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 08:39:12,951 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 08:39:12,968 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-03 08:39:12,969 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-03 08:39:12,970 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-03 08:39:12,971 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-03 08:39:12,975 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-03 08:39:12,976 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-03 08:39:12,977 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-03 08:39:12,978 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-03 08:39:13,003 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-10-03 08:39:13,018 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 08:39:13,018 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 08:39:13,021 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 08:39:13,021 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 08:39:13,021 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 08:39:13,022 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 08:39:13,022 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 08:39:13,022 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 08:39:13,022 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 08:39:13,022 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 08:39:13,023 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 08:39:13,023 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 08:39:13,023 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 08:39:13,023 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 08:39:13,024 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 08:39:13,025 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 08:39:13,025 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 08:39:13,025 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 08:39:13,025 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 08:39:13,026 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 08:39:13,026 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 08:39:13,026 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 08:39:13,026 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:39:13,026 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 08:39:13,028 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 08:39:13,028 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 08:39:13,028 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 08:39:13,028 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 08:39:13,028 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 08:39:13,029 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 08:39:13,073 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 08:39:13,088 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 08:39:13,095 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 08:39:13,097 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 08:39:13,098 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 08:39:13,098 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/functions1.i_3.bplTransformedIcfg_BEv2_8.bpl [2018-10-03 08:39:13,099 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/functions1.i_3.bplTransformedIcfg_BEv2_8.bpl' [2018-10-03 08:39:13,160 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 08:39:13,163 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 08:39:13,164 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 08:39:13,164 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 08:39:13,164 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 08:39:13,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:13" (1/1) ... [2018-10-03 08:39:13,197 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:13" (1/1) ... [2018-10-03 08:39:13,203 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 08:39:13,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 08:39:13,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 08:39:13,205 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 08:39:13,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:13" (1/1) ... [2018-10-03 08:39:13,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:13" (1/1) ... [2018-10-03 08:39:13,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:13" (1/1) ... [2018-10-03 08:39:13,214 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:13" (1/1) ... [2018-10-03 08:39:13,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:13" (1/1) ... [2018-10-03 08:39:13,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:13" (1/1) ... [2018-10-03 08:39:13,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:13" (1/1) ... [2018-10-03 08:39:13,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 08:39:13,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 08:39:13,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 08:39:13,222 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 08:39:13,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:39:13,287 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-03 08:39:13,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-03 08:39:13,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-03 08:39:13,492 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-03 08:39:13,493 INFO L202 PluginConnector]: Adding new model functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:39:13 BoogieIcfgContainer [2018-10-03 08:39:13,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 08:39:13,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 08:39:13,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 08:39:13,498 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 08:39:13,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:13" (1/2) ... [2018-10-03 08:39:13,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a3dae84 and model type functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 08:39:13, skipping insertion in model container [2018-10-03 08:39:13,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:39:13" (2/2) ... [2018-10-03 08:39:13,501 INFO L112 eAbstractionObserver]: Analyzing ICFG functions1.i_3.bplTransformedIcfg_BEv2_8.bpl [2018-10-03 08:39:13,512 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 08:39:13,520 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 08:39:13,579 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 08:39:13,580 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 08:39:13,580 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 08:39:13,580 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 08:39:13,582 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 08:39:13,583 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 08:39:13,583 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 08:39:13,583 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 08:39:13,583 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 08:39:13,602 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-03 08:39:13,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-03 08:39:13,620 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:13,624 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-03 08:39:13,625 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:13,637 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:13,638 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-10-03 08:39:13,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:13,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:13,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:13,699 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:13,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:13,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:13,842 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:39:13,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-03 08:39:13,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 08:39:13,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 08:39:13,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:39:13,868 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-03 08:39:13,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:13,934 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-10-03 08:39:13,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 08:39:13,937 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-03 08:39:13,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:13,950 INFO L225 Difference]: With dead ends: 9 [2018-10-03 08:39:13,950 INFO L226 Difference]: Without dead ends: 5 [2018-10-03 08:39:13,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:39:13,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-03 08:39:14,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-03 08:39:14,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-03 08:39:14,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-03 08:39:14,018 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-03 08:39:14,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:14,019 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-03 08:39:14,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 08:39:14,020 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-03 08:39:14,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-03 08:39:14,020 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:14,020 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-03 08:39:14,021 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:14,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:14,021 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2018-10-03 08:39:14,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:14,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:14,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:14,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:14,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:14,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:14,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:14,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:14,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:14,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:14,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-03 08:39:14,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 08:39:14,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 08:39:14,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:39:14,268 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-10-03 08:39:14,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:14,307 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-03 08:39:14,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 08:39:14,317 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-10-03 08:39:14,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:14,317 INFO L225 Difference]: With dead ends: 8 [2018-10-03 08:39:14,318 INFO L226 Difference]: Without dead ends: 6 [2018-10-03 08:39:14,319 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:39:14,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-03 08:39:14,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-03 08:39:14,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-03 08:39:14,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-03 08:39:14,321 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-03 08:39:14,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:14,322 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-03 08:39:14,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 08:39:14,322 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-03 08:39:14,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-03 08:39:14,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:14,322 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-03 08:39:14,323 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:14,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:14,323 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2018-10-03 08:39:14,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:14,324 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:14,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:14,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:14,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:14,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:14,426 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:14,435 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:14,458 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:14,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:14,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:14,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:14,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 08:39:14,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:39:14,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:39:14,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:39:14,498 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-10-03 08:39:14,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:14,557 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-03 08:39:14,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:39:14,558 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-10-03 08:39:14,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:14,558 INFO L225 Difference]: With dead ends: 9 [2018-10-03 08:39:14,559 INFO L226 Difference]: Without dead ends: 7 [2018-10-03 08:39:14,559 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:39:14,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-03 08:39:14,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-03 08:39:14,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-03 08:39:14,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-03 08:39:14,562 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-03 08:39:14,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:14,562 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-03 08:39:14,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:39:14,563 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-03 08:39:14,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-03 08:39:14,563 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:14,564 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-10-03 08:39:14,564 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:14,564 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:14,565 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2018-10-03 08:39:14,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:14,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:14,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:14,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:14,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:14,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:14,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:14,666 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:14,732 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-03 08:39:14,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:14,735 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:14,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:14,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:39:14,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:39:14,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:39:14,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:39:14,782 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-10-03 08:39:14,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:14,817 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-03 08:39:14,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:39:14,818 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-10-03 08:39:14,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:14,819 INFO L225 Difference]: With dead ends: 10 [2018-10-03 08:39:14,819 INFO L226 Difference]: Without dead ends: 8 [2018-10-03 08:39:14,819 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 [2018-10-03 08:39:14,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-03 08:39:14,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-03 08:39:14,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-03 08:39:14,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-03 08:39:14,822 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-03 08:39:14,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:14,822 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-03 08:39:14,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:39:14,823 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-03 08:39:14,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-03 08:39:14,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:14,823 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-10-03 08:39:14,824 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:14,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:14,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894467, now seen corresponding path program 4 times [2018-10-03 08:39:14,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:14,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:14,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:14,825 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:14,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:15,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:15,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:15,174 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) [2018-10-03 08:39:15,192 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:15,206 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:15,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:15,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:15,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:15,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:15,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:39:15,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:39:15,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:39:15,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:39:15,247 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-10-03 08:39:15,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:15,305 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-03 08:39:15,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:39:15,306 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-03 08:39:15,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:15,306 INFO L225 Difference]: With dead ends: 11 [2018-10-03 08:39:15,307 INFO L226 Difference]: Without dead ends: 9 [2018-10-03 08:39:15,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:39:15,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-03 08:39:15,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-03 08:39:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-03 08:39:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-03 08:39:15,310 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-03 08:39:15,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:15,311 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-03 08:39:15,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:39:15,311 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-03 08:39:15,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 08:39:15,312 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:15,312 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-10-03 08:39:15,312 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:15,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:15,312 INFO L82 PathProgramCache]: Analyzing trace with hash 317188140, now seen corresponding path program 5 times [2018-10-03 08:39:15,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:15,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:15,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:15,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:15,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:15,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:15,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:15,546 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:15,594 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-03 08:39:15,595 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:15,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:15,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:15,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:39:15,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:39:15,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:39:15,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:39:15,637 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-10-03 08:39:15,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:15,673 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-03 08:39:15,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:39:15,674 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-03 08:39:15,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:15,675 INFO L225 Difference]: With dead ends: 12 [2018-10-03 08:39:15,675 INFO L226 Difference]: Without dead ends: 10 [2018-10-03 08:39:15,676 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 [2018-10-03 08:39:15,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-03 08:39:15,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-03 08:39:15,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-03 08:39:15,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-03 08:39:15,680 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-03 08:39:15,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:15,681 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-03 08:39:15,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:39:15,681 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-03 08:39:15,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-03 08:39:15,683 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:15,683 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-10-03 08:39:15,683 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:15,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:15,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1242899555, now seen corresponding path program 6 times [2018-10-03 08:39:15,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:15,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:15,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:15,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:15,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:15,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:15,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:15,907 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:15,919 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:15,980 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-03 08:39:15,980 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:15,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:16,013 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:16,037 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:16,037 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:39:16,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:39:16,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:39:16,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:39:16,038 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-10-03 08:39:16,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:16,081 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-03 08:39:16,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:39:16,082 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-10-03 08:39:16,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:16,082 INFO L225 Difference]: With dead ends: 13 [2018-10-03 08:39:16,082 INFO L226 Difference]: Without dead ends: 11 [2018-10-03 08:39:16,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:39:16,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-03 08:39:16,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-03 08:39:16,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-03 08:39:16,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-03 08:39:16,086 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-03 08:39:16,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:16,086 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-03 08:39:16,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:39:16,086 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-03 08:39:16,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-03 08:39:16,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:16,087 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-10-03 08:39:16,087 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:16,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:16,088 INFO L82 PathProgramCache]: Analyzing trace with hash -124817652, now seen corresponding path program 7 times [2018-10-03 08:39:16,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:16,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:16,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:16,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:16,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:16,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:16,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:16,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:16,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:16,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:16,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:16,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:39:16,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:39:16,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:39:16,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:39:16,645 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-10-03 08:39:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:16,682 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-03 08:39:16,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:39:16,682 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-03 08:39:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:16,683 INFO L225 Difference]: With dead ends: 14 [2018-10-03 08:39:16,683 INFO L226 Difference]: Without dead ends: 12 [2018-10-03 08:39:16,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:39:16,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-03 08:39:16,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-03 08:39:16,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-03 08:39:16,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-03 08:39:16,687 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-03 08:39:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:16,687 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-03 08:39:16,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:39:16,687 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-03 08:39:16,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-03 08:39:16,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:16,688 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-10-03 08:39:16,688 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:16,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:16,688 INFO L82 PathProgramCache]: Analyzing trace with hash 425621891, now seen corresponding path program 8 times [2018-10-03 08:39:16,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:16,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:16,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:16,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:16,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:16,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:16,920 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:16,929 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:16,954 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:16,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:16,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:16,992 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:17,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:17,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:39:17,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:39:17,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:39:17,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:39:17,015 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-10-03 08:39:17,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:17,072 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-03 08:39:17,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:39:17,075 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-10-03 08:39:17,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:17,076 INFO L225 Difference]: With dead ends: 15 [2018-10-03 08:39:17,077 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 08:39:17,077 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 [2018-10-03 08:39:17,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 08:39:17,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-03 08:39:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-03 08:39:17,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-03 08:39:17,080 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-03 08:39:17,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:17,081 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-03 08:39:17,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:39:17,081 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-03 08:39:17,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-03 08:39:17,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:17,082 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-10-03 08:39:17,082 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:17,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:17,083 INFO L82 PathProgramCache]: Analyzing trace with hash 309378540, now seen corresponding path program 9 times [2018-10-03 08:39:17,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:17,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:17,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:17,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:17,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:17,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:17,228 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:17,240 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:17,302 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-03 08:39:17,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:17,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:17,357 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:17,357 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-03 08:39:17,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 08:39:17,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 08:39:17,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:39:17,358 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-10-03 08:39:17,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:17,437 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-03 08:39:17,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 08:39:17,438 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-10-03 08:39:17,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:17,439 INFO L225 Difference]: With dead ends: 16 [2018-10-03 08:39:17,439 INFO L226 Difference]: Without dead ends: 14 [2018-10-03 08:39:17,441 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 [2018-10-03 08:39:17,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-03 08:39:17,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-03 08:39:17,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-03 08:39:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-03 08:39:17,444 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-03 08:39:17,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:17,444 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-03 08:39:17,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 08:39:17,445 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-03 08:39:17,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:39:17,445 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:17,445 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-10-03 08:39:17,445 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:17,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:17,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1000801955, now seen corresponding path program 10 times [2018-10-03 08:39:17,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:17,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:17,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:17,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:17,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:17,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:17,793 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:17,801 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:17,838 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:17,839 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:17,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:17,861 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:17,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:17,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-03 08:39:17,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 08:39:17,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 08:39:17,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:39:17,893 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-10-03 08:39:17,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:17,938 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-03 08:39:17,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 08:39:17,939 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-10-03 08:39:17,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:17,939 INFO L225 Difference]: With dead ends: 17 [2018-10-03 08:39:17,939 INFO L226 Difference]: Without dead ends: 15 [2018-10-03 08:39:17,940 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:39:17,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-03 08:39:17,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-03 08:39:17,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-03 08:39:17,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-03 08:39:17,943 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-03 08:39:17,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:17,944 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-03 08:39:17,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 08:39:17,944 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-03 08:39:17,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-03 08:39:17,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:17,945 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-10-03 08:39:17,945 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:17,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:17,946 INFO L82 PathProgramCache]: Analyzing trace with hash 960091340, now seen corresponding path program 11 times [2018-10-03 08:39:17,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:17,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:17,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:17,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:17,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:18,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:18,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:18,181 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:18,207 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:39:18,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:18,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:18,232 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:18,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:18,256 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-03 08:39:18,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:39:18,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:39:18,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:39:18,257 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-10-03 08:39:18,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:18,307 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-03 08:39:18,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 08:39:18,308 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-03 08:39:18,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:18,309 INFO L225 Difference]: With dead ends: 18 [2018-10-03 08:39:18,309 INFO L226 Difference]: Without dead ends: 16 [2018-10-03 08:39:18,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:39:18,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-03 08:39:18,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-03 08:39:18,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 08:39:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-03 08:39:18,312 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-03 08:39:18,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:18,313 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-03 08:39:18,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:39:18,313 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-03 08:39:18,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-03 08:39:18,313 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:18,313 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-10-03 08:39:18,314 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:18,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:18,314 INFO L82 PathProgramCache]: Analyzing trace with hash -301937725, now seen corresponding path program 12 times [2018-10-03 08:39:18,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:18,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:18,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:18,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:18,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:18,532 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:18,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:18,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:18,541 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:18,611 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:39:18,612 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:18,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:18,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:18,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-03 08:39:18,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 08:39:18,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 08:39:18,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:39:18,668 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-10-03 08:39:18,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:18,772 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-03 08:39:18,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 08:39:18,776 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-10-03 08:39:18,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:18,777 INFO L225 Difference]: With dead ends: 19 [2018-10-03 08:39:18,777 INFO L226 Difference]: Without dead ends: 17 [2018-10-03 08:39:18,778 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 [2018-10-03 08:39:18,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-03 08:39:18,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-03 08:39:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-03 08:39:18,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-03 08:39:18,780 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-03 08:39:18,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:18,781 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-03 08:39:18,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 08:39:18,781 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-03 08:39:18,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-03 08:39:18,782 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:18,782 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-10-03 08:39:18,782 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:18,782 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:18,782 INFO L82 PathProgramCache]: Analyzing trace with hash -770133076, now seen corresponding path program 13 times [2018-10-03 08:39:18,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:18,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:18,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:18,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:18,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:19,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:19,389 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:19,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:19,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:19,427 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:19,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:19,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 08:39:19,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 08:39:19,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 08:39:19,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:39:19,499 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-10-03 08:39:19,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:19,859 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-03 08:39:19,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 08:39:19,859 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-10-03 08:39:19,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:19,860 INFO L225 Difference]: With dead ends: 20 [2018-10-03 08:39:19,860 INFO L226 Difference]: Without dead ends: 18 [2018-10-03 08:39:19,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:39:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-03 08:39:19,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-03 08:39:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-03 08:39:19,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-03 08:39:19,864 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-03 08:39:19,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:19,864 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-03 08:39:19,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 08:39:19,865 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-03 08:39:19,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:39:19,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:19,865 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-10-03 08:39:19,866 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:19,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:19,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1895680227, now seen corresponding path program 14 times [2018-10-03 08:39:19,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:19,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:19,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:19,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:19,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:20,157 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:20,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:20,172 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:20,209 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:20,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:20,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:20,231 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:20,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:20,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-03 08:39:20,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 08:39:20,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 08:39:20,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:39:20,264 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-03 08:39:20,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:20,374 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-03 08:39:20,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 08:39:20,375 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-03 08:39:20,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:20,375 INFO L225 Difference]: With dead ends: 21 [2018-10-03 08:39:20,376 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 08:39:20,376 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:39:20,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 08:39:20,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-03 08:39:20,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-03 08:39:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-03 08:39:20,380 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-03 08:39:20,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:20,381 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-03 08:39:20,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 08:39:20,381 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-03 08:39:20,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 08:39:20,381 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:20,382 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-10-03 08:39:20,382 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:20,382 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:20,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1363453300, now seen corresponding path program 15 times [2018-10-03 08:39:20,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:20,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:20,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:20,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:20,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:20,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:20,953 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:20,969 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:21,072 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:39:21,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:21,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:21,102 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:21,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:21,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-03 08:39:21,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 08:39:21,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 08:39:21,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:39:21,137 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-03 08:39:21,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:21,282 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-03 08:39:21,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 08:39:21,282 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-03 08:39:21,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:21,283 INFO L225 Difference]: With dead ends: 22 [2018-10-03 08:39:21,283 INFO L226 Difference]: Without dead ends: 20 [2018-10-03 08:39:21,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:39:21,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-03 08:39:21,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-03 08:39:21,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:39:21,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-03 08:39:21,288 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-03 08:39:21,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:21,288 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-03 08:39:21,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 08:39:21,288 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-03 08:39:21,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-03 08:39:21,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:21,289 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-10-03 08:39:21,290 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:21,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:21,290 INFO L82 PathProgramCache]: Analyzing trace with hash 682622467, now seen corresponding path program 16 times [2018-10-03 08:39:21,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:21,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:21,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:21,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:21,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:21,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:21,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:21,579 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:21,614 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:21,615 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:21,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:21,641 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:21,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:21,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-03 08:39:21,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 08:39:21,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 08:39:21,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:39:21,674 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-10-03 08:39:21,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:21,738 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-03 08:39:21,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 08:39:21,742 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-10-03 08:39:21,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:21,743 INFO L225 Difference]: With dead ends: 23 [2018-10-03 08:39:21,743 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 08:39:21,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:39:21,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 08:39:21,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-03 08:39:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-03 08:39:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-03 08:39:21,746 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-03 08:39:21,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:21,746 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-03 08:39:21,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 08:39:21,746 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-03 08:39:21,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-03 08:39:21,747 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:21,747 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-10-03 08:39:21,747 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:21,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:21,748 INFO L82 PathProgramCache]: Analyzing trace with hash -313538196, now seen corresponding path program 17 times [2018-10-03 08:39:21,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:21,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:21,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:21,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:21,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:22,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:22,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:22,721 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:22,761 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-03 08:39:22,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:22,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:22,786 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:22,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:22,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-03 08:39:22,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:39:22,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:39:22,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:39:22,820 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-10-03 08:39:22,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:22,953 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-03 08:39:22,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 08:39:22,954 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-10-03 08:39:22,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:22,955 INFO L225 Difference]: With dead ends: 24 [2018-10-03 08:39:22,955 INFO L226 Difference]: Without dead ends: 22 [2018-10-03 08:39:22,956 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:39:22,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-03 08:39:22,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-03 08:39:22,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-03 08:39:22,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-03 08:39:22,959 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-03 08:39:22,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:22,959 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-03 08:39:22,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:39:22,959 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-03 08:39:22,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-03 08:39:22,960 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:22,960 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-10-03 08:39:22,960 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:22,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:22,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1129747677, now seen corresponding path program 18 times [2018-10-03 08:39:22,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:22,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:22,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:22,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:22,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:23,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:23,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:23,335 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:23,371 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-03 08:39:23,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:23,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:23,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:23,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-03 08:39:23,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 08:39:23,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 08:39:23,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:39:23,427 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-10-03 08:39:23,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:23,539 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-03 08:39:23,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 08:39:23,540 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-10-03 08:39:23,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:23,540 INFO L225 Difference]: With dead ends: 25 [2018-10-03 08:39:23,541 INFO L226 Difference]: Without dead ends: 23 [2018-10-03 08:39:23,541 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:39:23,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-03 08:39:23,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-03 08:39:23,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-03 08:39:23,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-03 08:39:23,545 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-03 08:39:23,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:23,546 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-03 08:39:23,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 08:39:23,546 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-03 08:39:23,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 08:39:23,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:23,547 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-10-03 08:39:23,547 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:23,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:23,547 INFO L82 PathProgramCache]: Analyzing trace with hash -662437812, now seen corresponding path program 19 times [2018-10-03 08:39:23,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:23,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:23,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:23,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:23,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:24,010 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:24,011 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:24,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:24,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:24,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:24,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:24,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-03 08:39:24,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 08:39:24,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 08:39:24,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:39:24,115 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-10-03 08:39:24,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:24,483 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-03 08:39:24,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 08:39:24,484 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-03 08:39:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:24,484 INFO L225 Difference]: With dead ends: 26 [2018-10-03 08:39:24,484 INFO L226 Difference]: Without dead ends: 24 [2018-10-03 08:39:24,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:39:24,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-03 08:39:24,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-03 08:39:24,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-03 08:39:24,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-03 08:39:24,488 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-03 08:39:24,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:24,488 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-03 08:39:24,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 08:39:24,489 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-03 08:39:24,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-03 08:39:24,489 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:24,489 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-10-03 08:39:24,490 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:24,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:24,490 INFO L82 PathProgramCache]: Analyzing trace with hash 939266115, now seen corresponding path program 20 times [2018-10-03 08:39:24,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:24,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:24,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:24,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:24,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:25,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:25,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:25,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:25,629 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:25,629 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:25,632 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:25,682 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:25,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-03 08:39:25,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 08:39:25,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 08:39:25,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:39:25,684 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-10-03 08:39:25,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:25,748 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-03 08:39:25,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 08:39:25,748 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-10-03 08:39:25,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:25,749 INFO L225 Difference]: With dead ends: 27 [2018-10-03 08:39:25,750 INFO L226 Difference]: Without dead ends: 25 [2018-10-03 08:39:25,751 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:39:25,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-03 08:39:25,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-03 08:39:25,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-03 08:39:25,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-03 08:39:25,755 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-03 08:39:25,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:25,756 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-03 08:39:25,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 08:39:25,756 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-03 08:39:25,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-03 08:39:25,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:25,757 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-10-03 08:39:25,757 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:25,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:25,757 INFO L82 PathProgramCache]: Analyzing trace with hash -947519700, now seen corresponding path program 21 times [2018-10-03 08:39:25,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:25,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:25,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:25,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:25,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:26,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:26,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:26,414 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:26,459 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-03 08:39:26,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:26,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:26,518 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:26,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-03 08:39:26,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 08:39:26,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 08:39:26,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:39:26,520 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-10-03 08:39:26,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:26,607 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-03 08:39:26,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 08:39:26,610 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-10-03 08:39:26,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:26,610 INFO L225 Difference]: With dead ends: 28 [2018-10-03 08:39:26,611 INFO L226 Difference]: Without dead ends: 26 [2018-10-03 08:39:26,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:39:26,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-03 08:39:26,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-03 08:39:26,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:39:26,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-03 08:39:26,614 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-03 08:39:26,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:26,615 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-03 08:39:26,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 08:39:26,615 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-03 08:39:26,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-03 08:39:26,616 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:26,616 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-10-03 08:39:26,616 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:26,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:26,616 INFO L82 PathProgramCache]: Analyzing trace with hash 691662179, now seen corresponding path program 22 times [2018-10-03 08:39:26,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:26,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:26,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:26,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:26,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:27,804 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:27,804 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:27,836 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:27,891 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:27,892 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:27,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:27,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:27,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-03 08:39:27,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 08:39:27,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 08:39:27,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:39:27,960 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-10-03 08:39:28,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:28,050 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-03 08:39:28,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 08:39:28,050 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-10-03 08:39:28,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:28,051 INFO L225 Difference]: With dead ends: 29 [2018-10-03 08:39:28,051 INFO L226 Difference]: Without dead ends: 27 [2018-10-03 08:39:28,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:39:28,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-03 08:39:28,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-03 08:39:28,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-03 08:39:28,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-03 08:39:28,056 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-03 08:39:28,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:28,056 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-03 08:39:28,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 08:39:28,057 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-03 08:39:28,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-03 08:39:28,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:28,057 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-10-03 08:39:28,057 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:28,058 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:28,058 INFO L82 PathProgramCache]: Analyzing trace with hash -33307124, now seen corresponding path program 23 times [2018-10-03 08:39:28,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:28,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:28,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:28,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:28,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:28,444 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:28,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:28,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:28,455 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:28,507 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-03 08:39:28,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:28,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:28,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:28,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-03 08:39:28,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:39:28,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:39:28,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:39:28,569 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-10-03 08:39:28,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:28,808 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-03 08:39:28,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 08:39:28,808 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-03 08:39:28,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:28,809 INFO L225 Difference]: With dead ends: 30 [2018-10-03 08:39:28,809 INFO L226 Difference]: Without dead ends: 28 [2018-10-03 08:39:28,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:39:28,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-03 08:39:28,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-03 08:39:28,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-03 08:39:28,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-03 08:39:28,814 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-03 08:39:28,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:28,815 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-03 08:39:28,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:39:28,815 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-03 08:39:28,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-03 08:39:28,815 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:28,816 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-10-03 08:39:28,816 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:28,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:28,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1032519037, now seen corresponding path program 24 times [2018-10-03 08:39:28,816 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:28,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:28,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:28,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:28,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:29,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:29,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:29,687 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:29,737 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-03 08:39:29,738 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:29,741 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:29,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:29,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-03 08:39:29,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 08:39:29,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 08:39:29,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:39:29,786 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-10-03 08:39:29,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:29,854 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-03 08:39:29,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 08:39:29,854 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-10-03 08:39:29,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:29,855 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:39:29,855 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:39:29,856 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 [2018-10-03 08:39:29,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:39:29,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-03 08:39:29,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-03 08:39:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-03 08:39:29,859 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-03 08:39:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:29,859 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-03 08:39:29,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 08:39:29,860 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-03 08:39:29,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-03 08:39:29,860 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:29,860 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-10-03 08:39:29,861 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:29,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:29,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1943317268, now seen corresponding path program 25 times [2018-10-03 08:39:29,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:29,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:29,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:29,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:29,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:30,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:30,320 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:30,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:30,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:30,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:30,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:30,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-03 08:39:30,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 08:39:30,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 08:39:30,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:39:30,424 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-10-03 08:39:30,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:30,516 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-03 08:39:30,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 08:39:30,516 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-10-03 08:39:30,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:30,517 INFO L225 Difference]: With dead ends: 32 [2018-10-03 08:39:30,517 INFO L226 Difference]: Without dead ends: 30 [2018-10-03 08:39:30,518 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:39:30,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-03 08:39:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-03 08:39:30,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:39:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-03 08:39:30,521 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-03 08:39:30,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:30,521 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-03 08:39:30,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 08:39:30,521 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-03 08:39:30,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-03 08:39:30,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:30,522 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-10-03 08:39:30,522 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:30,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:30,523 INFO L82 PathProgramCache]: Analyzing trace with hash -113291357, now seen corresponding path program 26 times [2018-10-03 08:39:30,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:30,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:30,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:30,524 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:30,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:31,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:31,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:31,123 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:31,175 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:31,176 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:31,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:31,214 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:31,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:31,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-03 08:39:31,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 08:39:31,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 08:39:31,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:39:31,239 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-10-03 08:39:31,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:31,516 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-03 08:39:31,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 08:39:31,517 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-10-03 08:39:31,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:31,518 INFO L225 Difference]: With dead ends: 33 [2018-10-03 08:39:31,518 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:39:31,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:39:31,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:39:31,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-03 08:39:31,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 08:39:31,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-03 08:39:31,523 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-03 08:39:31,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:31,523 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-03 08:39:31,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 08:39:31,523 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-03 08:39:31,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-03 08:39:31,523 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:31,524 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-10-03 08:39:31,524 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:31,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:31,524 INFO L82 PathProgramCache]: Analyzing trace with hash 782937036, now seen corresponding path program 27 times [2018-10-03 08:39:31,524 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:31,524 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:31,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:31,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:31,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:31,992 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:31,992 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:32,002 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:32,076 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-03 08:39:32,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:32,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:32,123 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:32,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-03 08:39:32,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 08:39:32,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 08:39:32,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:39:32,124 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-10-03 08:39:32,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:32,180 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-03 08:39:32,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 08:39:32,181 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-03 08:39:32,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:32,181 INFO L225 Difference]: With dead ends: 34 [2018-10-03 08:39:32,181 INFO L226 Difference]: Without dead ends: 32 [2018-10-03 08:39:32,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:39:32,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-03 08:39:32,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-03 08:39:32,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-03 08:39:32,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-03 08:39:32,187 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-03 08:39:32,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:32,187 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-03 08:39:32,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 08:39:32,188 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-03 08:39:32,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-03 08:39:32,188 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:32,188 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-10-03 08:39:32,188 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:32,189 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:32,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1498753853, now seen corresponding path program 28 times [2018-10-03 08:39:32,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:32,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:32,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:32,190 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:32,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:32,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:32,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:32,925 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:32,971 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:32,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:32,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:33,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:33,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-03 08:39:33,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 08:39:33,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 08:39:33,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:39:33,027 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-10-03 08:39:33,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:33,081 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-03 08:39:33,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 08:39:33,081 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-10-03 08:39:33,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:33,082 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:39:33,082 INFO L226 Difference]: Without dead ends: 33 [2018-10-03 08:39:33,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:39:33,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-03 08:39:33,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-03 08:39:33,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-03 08:39:33,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-03 08:39:33,086 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-03 08:39:33,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:33,086 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-03 08:39:33,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 08:39:33,086 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-03 08:39:33,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-03 08:39:33,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:33,087 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-10-03 08:39:33,087 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:33,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:33,088 INFO L82 PathProgramCache]: Analyzing trace with hash 783272620, now seen corresponding path program 29 times [2018-10-03 08:39:33,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:33,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:33,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:33,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:33,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:33,571 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:33,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:33,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:33,580 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:33,640 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-03 08:39:33,640 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:33,644 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:33,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:33,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-03 08:39:33,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 08:39:33,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 08:39:33,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:39:33,693 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-10-03 08:39:33,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:33,903 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-03 08:39:33,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 08:39:33,903 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-10-03 08:39:33,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:33,903 INFO L225 Difference]: With dead ends: 36 [2018-10-03 08:39:33,904 INFO L226 Difference]: Without dead ends: 34 [2018-10-03 08:39:33,904 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 [2018-10-03 08:39:33,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-03 08:39:33,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-03 08:39:33,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-03 08:39:33,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-03 08:39:33,907 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-03 08:39:33,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:33,907 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-03 08:39:33,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 08:39:33,907 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-03 08:39:33,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-03 08:39:33,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:33,908 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-10-03 08:39:33,908 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:33,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:33,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1488350749, now seen corresponding path program 30 times [2018-10-03 08:39:33,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:33,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:33,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:33,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:33,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:34,333 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:34,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:34,333 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:34,342 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:34,397 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-03 08:39:34,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:34,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:34,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:34,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-03 08:39:34,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 08:39:34,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 08:39:34,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:39:34,461 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-10-03 08:39:34,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:34,569 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-03 08:39:34,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 08:39:34,569 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-10-03 08:39:34,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:34,570 INFO L225 Difference]: With dead ends: 37 [2018-10-03 08:39:34,570 INFO L226 Difference]: Without dead ends: 35 [2018-10-03 08:39:34,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:39:34,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-03 08:39:34,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-03 08:39:34,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 08:39:34,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-03 08:39:34,573 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-03 08:39:34,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:34,574 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-03 08:39:34,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 08:39:34,574 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-03 08:39:34,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-03 08:39:34,574 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:34,575 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-10-03 08:39:34,575 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:34,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:34,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1105768844, now seen corresponding path program 31 times [2018-10-03 08:39:34,575 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:34,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:34,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:34,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:34,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:35,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:35,393 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:35,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:35,450 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:35,477 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:35,511 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:35,511 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-03 08:39:35,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 08:39:35,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 08:39:35,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:39:35,512 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-10-03 08:39:35,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:35,739 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-03 08:39:35,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 08:39:35,740 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-03 08:39:35,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:35,740 INFO L225 Difference]: With dead ends: 38 [2018-10-03 08:39:35,740 INFO L226 Difference]: Without dead ends: 36 [2018-10-03 08:39:35,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:39:35,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-03 08:39:35,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-03 08:39:35,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-03 08:39:35,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-03 08:39:35,751 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-03 08:39:35,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:35,752 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-03 08:39:35,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 08:39:35,752 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-03 08:39:35,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-03 08:39:35,752 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:35,752 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-10-03 08:39:35,753 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:35,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:35,753 INFO L82 PathProgramCache]: Analyzing trace with hash -80902397, now seen corresponding path program 32 times [2018-10-03 08:39:35,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:35,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:35,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:35,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:35,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:36,347 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:36,347 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:36,354 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:36,399 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:36,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:36,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:36,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:36,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-03 08:39:36,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 08:39:36,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 08:39:36,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:39:36,450 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-10-03 08:39:36,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:36,512 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-03 08:39:36,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 08:39:36,512 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-10-03 08:39:36,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:36,513 INFO L225 Difference]: With dead ends: 39 [2018-10-03 08:39:36,513 INFO L226 Difference]: Without dead ends: 37 [2018-10-03 08:39:36,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:39:36,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-03 08:39:36,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-03 08:39:36,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-03 08:39:36,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-03 08:39:36,518 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-03 08:39:36,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:36,518 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-03 08:39:36,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 08:39:36,518 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-03 08:39:36,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-03 08:39:36,519 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:36,519 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-10-03 08:39:36,519 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:36,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:36,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1786994796, now seen corresponding path program 33 times [2018-10-03 08:39:36,519 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:36,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:36,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:36,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:36,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:37,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:37,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:37,308 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:37,365 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-03 08:39:37,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:37,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:37,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:37,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-03 08:39:37,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 08:39:37,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 08:39:37,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:39:37,422 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-10-03 08:39:37,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:37,517 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-03 08:39:37,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 08:39:37,517 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-10-03 08:39:37,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:37,518 INFO L225 Difference]: With dead ends: 40 [2018-10-03 08:39:37,518 INFO L226 Difference]: Without dead ends: 38 [2018-10-03 08:39:37,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:39:37,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-03 08:39:37,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-03 08:39:37,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-03 08:39:37,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-03 08:39:37,521 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-03 08:39:37,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:37,522 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-03 08:39:37,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 08:39:37,522 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-03 08:39:37,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-03 08:39:37,522 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:37,522 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-10-03 08:39:37,522 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:37,522 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:37,523 INFO L82 PathProgramCache]: Analyzing trace with hash -437734365, now seen corresponding path program 34 times [2018-10-03 08:39:37,523 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:37,523 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:37,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:37,523 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:37,523 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:38,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:38,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:38,361 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:38,414 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:38,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:38,418 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:38,444 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:38,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:38,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-03 08:39:38,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 08:39:38,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 08:39:38,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:39:38,476 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-10-03 08:39:38,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:38,785 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-03 08:39:38,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 08:39:38,786 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-10-03 08:39:38,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:38,786 INFO L225 Difference]: With dead ends: 41 [2018-10-03 08:39:38,786 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:39:38,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:39:38,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:39:38,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-03 08:39:38,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-03 08:39:38,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-03 08:39:38,789 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-03 08:39:38,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:38,790 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-03 08:39:38,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 08:39:38,790 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-03 08:39:38,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 08:39:38,791 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:38,791 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-10-03 08:39:38,791 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:38,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:38,791 INFO L82 PathProgramCache]: Analyzing trace with hash -684861620, now seen corresponding path program 35 times [2018-10-03 08:39:38,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:38,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:38,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:38,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:38,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:39,440 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:39,440 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:39,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:39,449 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:39,528 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-03 08:39:39,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:39,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:39,561 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:39,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:39,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-03 08:39:39,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:39:39,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:39:39,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:39:39,594 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-10-03 08:39:39,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:39,690 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-03 08:39:39,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 08:39:39,690 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-03 08:39:39,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:39,691 INFO L225 Difference]: With dead ends: 42 [2018-10-03 08:39:39,691 INFO L226 Difference]: Without dead ends: 40 [2018-10-03 08:39:39,691 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 [2018-10-03 08:39:39,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-03 08:39:39,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-03 08:39:39,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-03 08:39:39,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-03 08:39:39,693 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-03 08:39:39,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:39,694 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-03 08:39:39,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:39:39,694 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-03 08:39:39,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-03 08:39:39,695 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:39,695 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-10-03 08:39:39,695 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:39,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:39,695 INFO L82 PathProgramCache]: Analyzing trace with hash 244128067, now seen corresponding path program 36 times [2018-10-03 08:39:39,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:39,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:39,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:39,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:39,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:39,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:40,863 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:40,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:40,871 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:40,953 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-03 08:39:40,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:40,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:40,995 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:41,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:41,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-03 08:39:41,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 08:39:41,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 08:39:41,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:39:41,023 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-10-03 08:39:41,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:41,088 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-03 08:39:41,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 08:39:41,088 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-10-03 08:39:41,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:41,089 INFO L225 Difference]: With dead ends: 43 [2018-10-03 08:39:41,089 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:39:41,090 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:39:41,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:39:41,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-03 08:39:41,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-03 08:39:41,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-03 08:39:41,093 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-03 08:39:41,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:41,093 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-03 08:39:41,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 08:39:41,094 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-03 08:39:41,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-03 08:39:41,094 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:41,094 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-10-03 08:39:41,094 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:41,095 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:41,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1021962708, now seen corresponding path program 37 times [2018-10-03 08:39:41,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:41,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:41,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:41,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:41,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:42,934 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:42,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:42,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:42,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:42,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:43,057 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:43,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-03 08:39:43,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 08:39:43,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 08:39:43,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:39:43,059 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-10-03 08:39:43,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:43,161 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-03 08:39:43,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 08:39:43,161 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-10-03 08:39:43,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:43,161 INFO L225 Difference]: With dead ends: 44 [2018-10-03 08:39:43,161 INFO L226 Difference]: Without dead ends: 42 [2018-10-03 08:39:43,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:39:43,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-03 08:39:43,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-03 08:39:43,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-03 08:39:43,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-03 08:39:43,164 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-03 08:39:43,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:43,164 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-03 08:39:43,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 08:39:43,165 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-03 08:39:43,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-03 08:39:43,165 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:43,166 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-10-03 08:39:43,166 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:43,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:43,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1616071069, now seen corresponding path program 38 times [2018-10-03 08:39:43,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:43,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:43,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:43,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:43,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:43,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:43,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:43,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:43,911 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:43,966 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:43,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:43,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:44,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:44,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-03 08:39:44,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 08:39:44,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 08:39:44,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:39:44,030 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-10-03 08:39:44,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:44,392 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-03 08:39:44,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 08:39:44,392 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-10-03 08:39:44,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:44,393 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:39:44,393 INFO L226 Difference]: Without dead ends: 43 [2018-10-03 08:39:44,395 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:39:44,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-03 08:39:44,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-03 08:39:44,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-03 08:39:44,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-03 08:39:44,398 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-03 08:39:44,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:44,398 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-03 08:39:44,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 08:39:44,398 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-03 08:39:44,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-03 08:39:44,399 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:44,399 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-10-03 08:39:44,399 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:44,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:44,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1441406220, now seen corresponding path program 39 times [2018-10-03 08:39:44,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:44,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:44,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:44,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:44,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:46,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:46,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:46,452 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:46,526 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-03 08:39:46,526 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:46,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:46,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:46,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-03 08:39:46,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 08:39:46,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 08:39:46,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:39:46,577 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-10-03 08:39:46,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:46,648 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-03 08:39:46,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 08:39:46,649 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-03 08:39:46,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:46,650 INFO L225 Difference]: With dead ends: 46 [2018-10-03 08:39:46,650 INFO L226 Difference]: Without dead ends: 44 [2018-10-03 08:39:46,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:39:46,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-03 08:39:46,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-03 08:39:46,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-03 08:39:46,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-03 08:39:46,653 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-03 08:39:46,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:46,654 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-03 08:39:46,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 08:39:46,654 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-03 08:39:46,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-03 08:39:46,654 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:46,654 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-10-03 08:39:46,654 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:46,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:46,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1733921667, now seen corresponding path program 40 times [2018-10-03 08:39:46,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:46,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:46,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:46,655 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:46,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:46,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:47,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:47,381 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:47,389 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:47,453 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:47,453 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:47,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:47,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:47,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-03 08:39:47,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 08:39:47,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 08:39:47,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:39:47,508 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-10-03 08:39:47,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:47,655 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-03 08:39:47,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 08:39:47,655 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-10-03 08:39:47,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:47,656 INFO L225 Difference]: With dead ends: 47 [2018-10-03 08:39:47,656 INFO L226 Difference]: Without dead ends: 45 [2018-10-03 08:39:47,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:39:47,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-03 08:39:47,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-03 08:39:47,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-03 08:39:47,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-03 08:39:47,659 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-03 08:39:47,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:47,659 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-03 08:39:47,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 08:39:47,660 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-03 08:39:47,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-03 08:39:47,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:47,660 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-10-03 08:39:47,660 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:47,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:47,660 INFO L82 PathProgramCache]: Analyzing trace with hash -2083001364, now seen corresponding path program 41 times [2018-10-03 08:39:47,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:47,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:47,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:47,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:47,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:48,433 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:48,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:48,440 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:48,618 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-03 08:39:48,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:48,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:48,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:48,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-03 08:39:48,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 08:39:48,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 08:39:48,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:39:48,676 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-10-03 08:39:48,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:48,744 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-03 08:39:48,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 08:39:48,745 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-10-03 08:39:48,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:48,745 INFO L225 Difference]: With dead ends: 48 [2018-10-03 08:39:48,745 INFO L226 Difference]: Without dead ends: 46 [2018-10-03 08:39:48,747 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 [2018-10-03 08:39:48,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-03 08:39:48,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-03 08:39:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-03 08:39:48,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-03 08:39:48,749 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-03 08:39:48,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:48,749 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-03 08:39:48,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 08:39:48,749 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-03 08:39:48,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-03 08:39:48,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:48,750 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-10-03 08:39:48,750 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:48,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:48,750 INFO L82 PathProgramCache]: Analyzing trace with hash -148531037, now seen corresponding path program 42 times [2018-10-03 08:39:48,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:48,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:48,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:48,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:48,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:49,559 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:49,559 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:49,566 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:49,649 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-03 08:39:49,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:49,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:49,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:49,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-03 08:39:49,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 08:39:49,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 08:39:49,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:39:49,712 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-10-03 08:39:49,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:49,859 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-03 08:39:49,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 08:39:49,859 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-10-03 08:39:49,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:49,860 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:39:49,860 INFO L226 Difference]: Without dead ends: 47 [2018-10-03 08:39:49,861 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 [2018-10-03 08:39:49,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-03 08:39:49,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-03 08:39:49,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-03 08:39:49,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-03 08:39:49,863 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-03 08:39:49,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:49,864 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-03 08:39:49,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 08:39:49,864 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-03 08:39:49,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-03 08:39:49,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:49,864 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-10-03 08:39:49,865 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:49,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:49,865 INFO L82 PathProgramCache]: Analyzing trace with hash -309493044, now seen corresponding path program 43 times [2018-10-03 08:39:49,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:49,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:49,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:49,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:49,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:51,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:51,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:51,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:51,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:51,215 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:51,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:51,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-03 08:39:51,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 08:39:51,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 08:39:51,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:39:51,247 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-10-03 08:39:51,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:51,485 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-03 08:39:51,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 08:39:51,485 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-03 08:39:51,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:51,486 INFO L225 Difference]: With dead ends: 50 [2018-10-03 08:39:51,486 INFO L226 Difference]: Without dead ends: 48 [2018-10-03 08:39:51,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:39:51,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-03 08:39:51,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-03 08:39:51,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-03 08:39:51,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-03 08:39:51,489 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-03 08:39:51,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:51,489 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-03 08:39:51,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 08:39:51,489 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-03 08:39:51,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-03 08:39:51,490 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:51,490 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-10-03 08:39:51,490 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:51,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:51,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1004347965, now seen corresponding path program 44 times [2018-10-03 08:39:51,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:51,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:51,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:51,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:51,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:51,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:52,447 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:52,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:52,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:52,455 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:52,519 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:52,520 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:52,524 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:52,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:52,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-03 08:39:52,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 08:39:52,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 08:39:52,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:39:52,580 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-10-03 08:39:52,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:52,696 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-03 08:39:52,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 08:39:52,697 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-10-03 08:39:52,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:52,698 INFO L225 Difference]: With dead ends: 51 [2018-10-03 08:39:52,698 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:39:52,699 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 [2018-10-03 08:39:52,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:39:52,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-03 08:39:52,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-03 08:39:52,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-03 08:39:52,702 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-03 08:39:52,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:52,702 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-03 08:39:52,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 08:39:52,702 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-03 08:39:52,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-03 08:39:52,703 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:52,703 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-10-03 08:39:52,703 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:52,703 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:52,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1070014036, now seen corresponding path program 45 times [2018-10-03 08:39:52,703 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:52,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:52,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:52,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:52,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:53,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:53,561 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:53,572 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:53,656 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-03 08:39:53,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:53,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:53,707 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:53,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-03 08:39:53,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 08:39:53,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 08:39:53,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:39:53,708 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-10-03 08:39:54,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:54,293 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-03 08:39:54,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 08:39:54,294 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-10-03 08:39:54,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:54,294 INFO L225 Difference]: With dead ends: 52 [2018-10-03 08:39:54,294 INFO L226 Difference]: Without dead ends: 50 [2018-10-03 08:39:54,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:39:54,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-03 08:39:54,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-03 08:39:54,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-03 08:39:54,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-03 08:39:54,296 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-03 08:39:54,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:54,297 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-03 08:39:54,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 08:39:54,297 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-03 08:39:54,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-03 08:39:54,298 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:54,298 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-10-03 08:39:54,298 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:54,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:54,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1189305059, now seen corresponding path program 46 times [2018-10-03 08:39:54,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:54,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:54,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:54,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:54,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:55,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:55,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:55,556 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:55,623 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:55,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:55,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:55,673 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:55,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-03 08:39:55,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 08:39:55,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 08:39:55,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:39:55,674 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-10-03 08:39:55,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:55,746 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-03 08:39:55,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 08:39:55,746 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-10-03 08:39:55,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:55,747 INFO L225 Difference]: With dead ends: 53 [2018-10-03 08:39:55,747 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:39:55,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:39:55,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:39:55,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-03 08:39:55,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-03 08:39:55,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-03 08:39:55,750 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-03 08:39:55,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:55,751 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-03 08:39:55,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 08:39:55,751 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-03 08:39:55,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-03 08:39:55,751 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:55,751 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-10-03 08:39:55,751 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:55,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:55,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1786247028, now seen corresponding path program 47 times [2018-10-03 08:39:55,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:55,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:55,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:55,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:55,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:56,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:56,956 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:56,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:56,963 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:57,066 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-03 08:39:57,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:57,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:57,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:57,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-03 08:39:57,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:39:57,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:39:57,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:39:57,134 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-10-03 08:39:57,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:57,289 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-03 08:39:57,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 08:39:57,290 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-03 08:39:57,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:57,291 INFO L225 Difference]: With dead ends: 54 [2018-10-03 08:39:57,291 INFO L226 Difference]: Without dead ends: 52 [2018-10-03 08:39:57,292 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 [2018-10-03 08:39:57,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-03 08:39:57,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-03 08:39:57,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-03 08:39:57,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-03 08:39:57,294 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-03 08:39:57,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:57,294 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-03 08:39:57,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:39:57,294 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-03 08:39:57,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-03 08:39:57,295 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:57,295 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-10-03 08:39:57,295 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:57,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:57,295 INFO L82 PathProgramCache]: Analyzing trace with hash 460918787, now seen corresponding path program 48 times [2018-10-03 08:39:57,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:57,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:57,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:57,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:57,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:58,244 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:58,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:58,250 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:58,341 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-03 08:39:58,341 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:58,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:58,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:58,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-03 08:39:58,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 08:39:58,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 08:39:58,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:39:58,393 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-10-03 08:39:58,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:58,490 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-03 08:39:58,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 08:39:58,490 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-10-03 08:39:58,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:58,491 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:39:58,491 INFO L226 Difference]: Without dead ends: 53 [2018-10-03 08:39:58,492 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:39:58,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-03 08:39:58,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-03 08:39:58,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-03 08:39:58,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-03 08:39:58,495 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-03 08:39:58,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:58,495 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-03 08:39:58,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 08:39:58,496 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-03 08:39:58,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-03 08:39:58,496 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:58,496 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-10-03 08:39:58,496 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:58,496 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:58,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1403582316, now seen corresponding path program 49 times [2018-10-03 08:39:58,497 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:58,497 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:58,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:58,497 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:58,497 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:00,679 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:00,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:00,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:00,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:00,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:00,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-03 08:40:00,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 08:40:00,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 08:40:00,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:40:00,817 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-10-03 08:40:00,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:00,908 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-03 08:40:00,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 08:40:00,909 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-10-03 08:40:00,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:00,910 INFO L225 Difference]: With dead ends: 56 [2018-10-03 08:40:00,910 INFO L226 Difference]: Without dead ends: 54 [2018-10-03 08:40:00,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:40:00,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-03 08:40:00,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-03 08:40:00,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-03 08:40:00,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-03 08:40:00,912 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-03 08:40:00,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:00,912 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-03 08:40:00,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 08:40:00,912 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-03 08:40:00,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-03 08:40:00,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:00,912 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-10-03 08:40:00,913 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:00,913 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:00,913 INFO L82 PathProgramCache]: Analyzing trace with hash 561380643, now seen corresponding path program 50 times [2018-10-03 08:40:00,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:00,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:00,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:00,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:00,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:02,127 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:02,127 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:02,135 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:02,209 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:02,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:02,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:02,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:02,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-03 08:40:02,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 08:40:02,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 08:40:02,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:40:02,264 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-10-03 08:40:02,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:02,369 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-03 08:40:02,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 08:40:02,370 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-10-03 08:40:02,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:02,370 INFO L225 Difference]: With dead ends: 57 [2018-10-03 08:40:02,371 INFO L226 Difference]: Without dead ends: 55 [2018-10-03 08:40:02,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:40:02,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-03 08:40:02,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-03 08:40:02,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-03 08:40:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-03 08:40:02,373 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-03 08:40:02,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:02,373 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-03 08:40:02,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 08:40:02,373 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-03 08:40:02,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-03 08:40:02,374 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:02,374 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-10-03 08:40:02,374 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:02,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:02,374 INFO L82 PathProgramCache]: Analyzing trace with hash 222932556, now seen corresponding path program 51 times [2018-10-03 08:40:02,375 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:02,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:02,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:02,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:02,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:03,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:03,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:03,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:03,482 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:03,589 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-03 08:40:03,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:03,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:03,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:03,652 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-03 08:40:03,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 08:40:03,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 08:40:03,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:40:03,654 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-10-03 08:40:03,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:03,778 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-03 08:40:03,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 08:40:03,778 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-03 08:40:03,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:03,779 INFO L225 Difference]: With dead ends: 58 [2018-10-03 08:40:03,779 INFO L226 Difference]: Without dead ends: 56 [2018-10-03 08:40:03,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:40:03,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-03 08:40:03,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-03 08:40:03,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-03 08:40:03,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-03 08:40:03,783 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-03 08:40:03,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:03,783 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-03 08:40:03,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 08:40:03,783 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-03 08:40:03,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-03 08:40:03,784 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:03,784 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-10-03 08:40:03,784 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:03,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:03,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1679023549, now seen corresponding path program 52 times [2018-10-03 08:40:03,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:03,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:03,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:03,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:03,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:05,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:05,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:05,773 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:05,780 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:05,853 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:05,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:05,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:05,919 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:05,919 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-03 08:40:05,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-03 08:40:05,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-03 08:40:05,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:40:05,921 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-10-03 08:40:06,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:06,022 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-03 08:40:06,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 08:40:06,022 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-10-03 08:40:06,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:06,023 INFO L225 Difference]: With dead ends: 59 [2018-10-03 08:40:06,023 INFO L226 Difference]: Without dead ends: 57 [2018-10-03 08:40:06,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:40:06,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-03 08:40:06,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-03 08:40:06,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-03 08:40:06,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-03 08:40:06,027 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-03 08:40:06,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:06,027 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-03 08:40:06,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-03 08:40:06,027 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-03 08:40:06,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-03 08:40:06,028 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:06,028 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-10-03 08:40:06,028 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:06,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:06,029 INFO L82 PathProgramCache]: Analyzing trace with hash -510120660, now seen corresponding path program 53 times [2018-10-03 08:40:06,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:06,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:06,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:06,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:06,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:07,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:07,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:07,197 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:07,315 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-03 08:40:07,315 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:07,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:07,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:07,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:07,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-03 08:40:07,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 08:40:07,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 08:40:07,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:40:07,378 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-10-03 08:40:07,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:07,465 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-03 08:40:07,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 08:40:07,465 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-10-03 08:40:07,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:07,466 INFO L225 Difference]: With dead ends: 60 [2018-10-03 08:40:07,466 INFO L226 Difference]: Without dead ends: 58 [2018-10-03 08:40:07,467 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 [2018-10-03 08:40:07,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-03 08:40:07,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-03 08:40:07,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-03 08:40:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-03 08:40:07,469 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-03 08:40:07,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:07,470 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-03 08:40:07,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 08:40:07,470 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-03 08:40:07,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-03 08:40:07,470 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:07,470 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-10-03 08:40:07,470 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:07,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:07,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1366130531, now seen corresponding path program 54 times [2018-10-03 08:40:07,471 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:07,471 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:07,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:07,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:07,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:08,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:08,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:08,708 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:08,814 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-03 08:40:08,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:08,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:08,881 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:08,881 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-03 08:40:08,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-03 08:40:08,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-03 08:40:08,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:40:08,883 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-10-03 08:40:09,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:09,044 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-03 08:40:09,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-03 08:40:09,045 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-10-03 08:40:09,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:09,046 INFO L225 Difference]: With dead ends: 61 [2018-10-03 08:40:09,046 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:40:09,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-10-03 08:40:09,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:40:09,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-03 08:40:09,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-03 08:40:09,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-03 08:40:09,048 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-03 08:40:09,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:09,048 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-03 08:40:09,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-03 08:40:09,048 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-03 08:40:09,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 08:40:09,048 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:09,049 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-10-03 08:40:09,049 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:09,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:09,049 INFO L82 PathProgramCache]: Analyzing trace with hash -599624692, now seen corresponding path program 55 times [2018-10-03 08:40:09,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:09,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:09,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:09,050 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:09,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:10,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:10,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:10,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:10,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:10,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:10,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:10,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-03 08:40:10,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 08:40:10,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 08:40:10,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:40:10,630 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-10-03 08:40:10,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:10,764 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-03 08:40:10,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 08:40:10,765 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-03 08:40:10,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:10,766 INFO L225 Difference]: With dead ends: 62 [2018-10-03 08:40:10,766 INFO L226 Difference]: Without dead ends: 60 [2018-10-03 08:40:10,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:40:10,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-03 08:40:10,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-03 08:40:10,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-03 08:40:10,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-03 08:40:10,768 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-03 08:40:10,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:10,769 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-03 08:40:10,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 08:40:10,769 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-03 08:40:10,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-03 08:40:10,769 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:10,770 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-10-03 08:40:10,770 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:10,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:10,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1408494461, now seen corresponding path program 56 times [2018-10-03 08:40:10,770 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:10,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:10,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:10,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:10,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:12,234 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:12,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:12,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:12,318 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:12,318 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:12,323 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:12,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:12,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-03 08:40:12,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-03 08:40:12,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-03 08:40:12,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:40:12,372 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-10-03 08:40:12,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:12,479 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-03 08:40:12,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-03 08:40:12,479 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-10-03 08:40:12,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:12,480 INFO L225 Difference]: With dead ends: 63 [2018-10-03 08:40:12,480 INFO L226 Difference]: Without dead ends: 61 [2018-10-03 08:40:12,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:40:12,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-03 08:40:12,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-03 08:40:12,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-03 08:40:12,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-03 08:40:12,484 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-03 08:40:12,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:12,484 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-03 08:40:12,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-03 08:40:12,484 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-03 08:40:12,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-03 08:40:12,485 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:12,485 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-10-03 08:40:12,485 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:12,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:12,486 INFO L82 PathProgramCache]: Analyzing trace with hash -713653524, now seen corresponding path program 57 times [2018-10-03 08:40:12,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:12,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:12,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:12,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:12,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:13,832 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:13,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:13,839 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:13,960 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-03 08:40:13,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:13,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:14,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:14,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-03 08:40:14,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-03 08:40:14,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-03 08:40:14,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:40:14,034 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-10-03 08:40:14,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:14,173 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-03 08:40:14,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-03 08:40:14,173 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-10-03 08:40:14,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:14,174 INFO L225 Difference]: With dead ends: 64 [2018-10-03 08:40:14,174 INFO L226 Difference]: Without dead ends: 62 [2018-10-03 08:40:14,175 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 [2018-10-03 08:40:14,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-03 08:40:14,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-03 08:40:14,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-03 08:40:14,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-03 08:40:14,180 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-03 08:40:14,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:14,180 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-03 08:40:14,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-03 08:40:14,180 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-03 08:40:14,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-03 08:40:14,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:14,181 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-10-03 08:40:14,181 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:14,181 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:14,181 INFO L82 PathProgramCache]: Analyzing trace with hash -648420957, now seen corresponding path program 58 times [2018-10-03 08:40:14,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:14,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:14,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:14,182 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:14,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:15,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:15,773 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:15,782 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:15,866 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:15,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:15,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:15,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:15,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-03 08:40:15,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-03 08:40:15,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-03 08:40:15,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-10-03 08:40:15,937 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-10-03 08:40:16,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:16,060 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-03 08:40:16,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-03 08:40:16,060 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-10-03 08:40:16,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:16,061 INFO L225 Difference]: With dead ends: 65 [2018-10-03 08:40:16,061 INFO L226 Difference]: Without dead ends: 63 [2018-10-03 08:40:16,061 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 [2018-10-03 08:40:16,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-03 08:40:16,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-03 08:40:16,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-03 08:40:16,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-03 08:40:16,065 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-03 08:40:16,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:16,065 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-03 08:40:16,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-03 08:40:16,065 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-03 08:40:16,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 08:40:16,065 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:16,065 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-10-03 08:40:16,066 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:16,066 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:16,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1373788620, now seen corresponding path program 59 times [2018-10-03 08:40:16,066 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:16,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:16,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:16,067 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:16,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:17,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:17,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:17,490 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:17,622 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-03 08:40:17,623 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:17,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:17,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:17,703 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-03 08:40:17,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-03 08:40:17,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-03 08:40:17,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:40:17,704 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-10-03 08:40:17,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:17,858 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-03 08:40:17,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-03 08:40:17,859 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-03 08:40:17,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:17,859 INFO L225 Difference]: With dead ends: 66 [2018-10-03 08:40:17,860 INFO L226 Difference]: Without dead ends: 64 [2018-10-03 08:40:17,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:40:17,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-03 08:40:17,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-03 08:40:17,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-03 08:40:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-03 08:40:17,863 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-03 08:40:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:17,863 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-03 08:40:17,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-03 08:40:17,863 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-03 08:40:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-03 08:40:17,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:17,864 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-10-03 08:40:17,864 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:17,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:17,864 INFO L82 PathProgramCache]: Analyzing trace with hash -362223933, now seen corresponding path program 60 times [2018-10-03 08:40:17,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:17,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:17,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:17,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:17,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:17,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:19,245 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:19,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:19,252 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:19,383 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-03 08:40:19,383 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:19,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:19,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:19,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-03 08:40:19,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-03 08:40:19,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-03 08:40:19,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:40:19,445 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-10-03 08:40:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:19,568 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-03 08:40:19,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-03 08:40:19,568 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-10-03 08:40:19,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:19,569 INFO L225 Difference]: With dead ends: 67 [2018-10-03 08:40:19,569 INFO L226 Difference]: Without dead ends: 65 [2018-10-03 08:40:19,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-10-03 08:40:19,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-03 08:40:19,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-03 08:40:19,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-03 08:40:19,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-03 08:40:19,571 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-03 08:40:19,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:19,571 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-03 08:40:19,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-03 08:40:19,571 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-03 08:40:19,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-03 08:40:19,572 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:19,572 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-10-03 08:40:19,572 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:19,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:19,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1655961772, now seen corresponding path program 61 times [2018-10-03 08:40:19,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:19,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:19,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:19,573 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:19,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:21,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:21,525 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:21,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:21,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:21,690 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:21,690 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-03 08:40:21,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-03 08:40:21,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-03 08:40:21,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:40:21,691 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-10-03 08:40:21,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:21,795 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-03 08:40:21,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-03 08:40:21,796 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-10-03 08:40:21,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:21,796 INFO L225 Difference]: With dead ends: 68 [2018-10-03 08:40:21,797 INFO L226 Difference]: Without dead ends: 66 [2018-10-03 08:40:21,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:40:21,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-03 08:40:21,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-03 08:40:21,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-03 08:40:21,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-03 08:40:21,799 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-03 08:40:21,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:21,799 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-03 08:40:21,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-03 08:40:21,799 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-03 08:40:21,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-03 08:40:21,799 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:21,799 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-10-03 08:40:21,800 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:21,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:21,800 INFO L82 PathProgramCache]: Analyzing trace with hash -204790813, now seen corresponding path program 62 times [2018-10-03 08:40:21,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:21,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:21,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:21,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:21,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:23,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:23,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:23,367 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:23,457 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:23,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:23,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:23,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:23,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-03 08:40:23,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-03 08:40:23,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-03 08:40:23,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:40:23,526 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-10-03 08:40:23,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:23,683 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-03 08:40:23,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-03 08:40:23,684 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-10-03 08:40:23,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:23,685 INFO L225 Difference]: With dead ends: 69 [2018-10-03 08:40:23,685 INFO L226 Difference]: Without dead ends: 67 [2018-10-03 08:40:23,685 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 [2018-10-03 08:40:23,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-03 08:40:23,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-03 08:40:23,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-03 08:40:23,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-03 08:40:23,688 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-03 08:40:23,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:23,688 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-03 08:40:23,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-03 08:40:23,688 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-03 08:40:23,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-03 08:40:23,689 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:23,689 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-10-03 08:40:23,689 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:23,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:23,689 INFO L82 PathProgramCache]: Analyzing trace with hash -2053546100, now seen corresponding path program 63 times [2018-10-03 08:40:23,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:23,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:23,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:23,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:23,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:25,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:25,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:25,237 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:25,247 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:25,471 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-03 08:40:25,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:25,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:25,554 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:25,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-03 08:40:25,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-03 08:40:25,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-03 08:40:25,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:40:25,556 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-10-03 08:40:25,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:25,728 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-03 08:40:25,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-03 08:40:25,734 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-03 08:40:25,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:25,734 INFO L225 Difference]: With dead ends: 70 [2018-10-03 08:40:25,734 INFO L226 Difference]: Without dead ends: 68 [2018-10-03 08:40:25,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:40:25,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-03 08:40:25,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-03 08:40:25,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-03 08:40:25,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-03 08:40:25,737 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-03 08:40:25,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:25,738 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-03 08:40:25,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-03 08:40:25,738 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-03 08:40:25,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-03 08:40:25,738 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:25,738 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-10-03 08:40:25,739 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:25,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:25,739 INFO L82 PathProgramCache]: Analyzing trace with hash 764582147, now seen corresponding path program 64 times [2018-10-03 08:40:25,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:25,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:25,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:25,740 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:25,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:27,461 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:27,461 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) [2018-10-03 08:40:27,477 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:27,570 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:27,570 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:27,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:27,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:27,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:27,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-03 08:40:27,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-03 08:40:27,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-03 08:40:27,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:40:27,645 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-10-03 08:40:27,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:27,794 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-03 08:40:27,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-03 08:40:27,794 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-10-03 08:40:27,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:27,795 INFO L225 Difference]: With dead ends: 71 [2018-10-03 08:40:27,795 INFO L226 Difference]: Without dead ends: 69 [2018-10-03 08:40:27,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-10-03 08:40:27,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-03 08:40:27,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-03 08:40:27,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-03 08:40:27,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-03 08:40:27,798 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-03 08:40:27,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:27,798 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-03 08:40:27,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-03 08:40:27,798 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-03 08:40:27,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-03 08:40:27,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:27,798 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-10-03 08:40:27,799 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:27,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:27,799 INFO L82 PathProgramCache]: Analyzing trace with hash -2067755412, now seen corresponding path program 65 times [2018-10-03 08:40:27,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:27,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:27,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:27,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:27,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:29,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:29,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:29,453 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:29,602 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-03 08:40:29,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:29,612 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:29,691 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:29,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-03 08:40:29,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-03 08:40:29,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-03 08:40:29,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:40:29,693 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-10-03 08:40:30,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:30,046 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-03 08:40:30,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-03 08:40:30,046 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-10-03 08:40:30,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:30,047 INFO L225 Difference]: With dead ends: 72 [2018-10-03 08:40:30,047 INFO L226 Difference]: Without dead ends: 70 [2018-10-03 08:40:30,047 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 [2018-10-03 08:40:30,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-03 08:40:30,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-03 08:40:30,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-03 08:40:30,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-03 08:40:30,049 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-03 08:40:30,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:30,049 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-03 08:40:30,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-03 08:40:30,049 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-03 08:40:30,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-03 08:40:30,050 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:30,050 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-10-03 08:40:30,050 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:30,050 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:30,050 INFO L82 PathProgramCache]: Analyzing trace with hash 324093475, now seen corresponding path program 66 times [2018-10-03 08:40:30,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:30,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:30,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:30,051 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:30,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:32,202 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:32,202 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:32,211 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:32,353 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-03 08:40:32,353 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:32,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:32,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:32,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-03 08:40:32,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-03 08:40:32,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-03 08:40:32,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:40:32,438 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-10-03 08:40:33,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:33,434 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-03 08:40:33,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-03 08:40:33,435 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-10-03 08:40:33,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:33,435 INFO L225 Difference]: With dead ends: 73 [2018-10-03 08:40:33,435 INFO L226 Difference]: Without dead ends: 71 [2018-10-03 08:40:33,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-10-03 08:40:33,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-03 08:40:33,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-03 08:40:33,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-03 08:40:33,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-03 08:40:33,438 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-10-03 08:40:33,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:33,439 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-03 08:40:33,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-03 08:40:33,439 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-03 08:40:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-03 08:40:33,439 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:33,440 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-10-03 08:40:33,440 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:33,440 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:33,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1456964940, now seen corresponding path program 67 times [2018-10-03 08:40:33,440 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:33,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:33,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:33,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:33,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:33,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:36,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:36,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:36,813 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:36,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:36,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:36,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-03 08:40:36,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-03 08:40:36,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-03 08:40:36,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:40:36,970 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-10-03 08:40:37,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:37,110 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-03 08:40:37,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-03 08:40:37,111 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-10-03 08:40:37,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:37,111 INFO L225 Difference]: With dead ends: 74 [2018-10-03 08:40:37,112 INFO L226 Difference]: Without dead ends: 72 [2018-10-03 08:40:37,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:40:37,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-03 08:40:37,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-03 08:40:37,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-03 08:40:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-03 08:40:37,115 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-10-03 08:40:37,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:37,115 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-03 08:40:37,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-03 08:40:37,115 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-03 08:40:37,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-03 08:40:37,116 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:37,116 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-10-03 08:40:37,116 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:37,116 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:37,116 INFO L82 PathProgramCache]: Analyzing trace with hash -2078725309, now seen corresponding path program 68 times [2018-10-03 08:40:37,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:37,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:37,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:37,117 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:37,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:38,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:38,950 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:38,957 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:39,050 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:39,051 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:39,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:39,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:39,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:39,164 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-03 08:40:39,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-03 08:40:39,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-03 08:40:39,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:40:39,166 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-10-03 08:40:39,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:39,396 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-03 08:40:39,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-03 08:40:39,396 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-10-03 08:40:39,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:39,397 INFO L225 Difference]: With dead ends: 75 [2018-10-03 08:40:39,397 INFO L226 Difference]: Without dead ends: 73 [2018-10-03 08:40:39,397 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:40:39,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-03 08:40:39,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-03 08:40:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-03 08:40:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-03 08:40:39,399 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-03 08:40:39,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:39,399 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-03 08:40:39,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-03 08:40:39,400 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-03 08:40:39,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-03 08:40:39,400 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:39,400 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-10-03 08:40:39,401 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:39,401 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:39,401 INFO L82 PathProgramCache]: Analyzing trace with hash -15973332, now seen corresponding path program 69 times [2018-10-03 08:40:39,401 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:39,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:39,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:39,402 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:39,402 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:39,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:41,796 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:41,796 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:41,803 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:41,963 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-03 08:40:41,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:41,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:42,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:42,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:42,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-03 08:40:42,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-03 08:40:42,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-03 08:40:42,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:40:42,023 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-10-03 08:40:42,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:42,191 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-03 08:40:42,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-03 08:40:42,194 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-10-03 08:40:42,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:42,195 INFO L225 Difference]: With dead ends: 76 [2018-10-03 08:40:42,195 INFO L226 Difference]: Without dead ends: 74 [2018-10-03 08:40:42,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:40:42,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-03 08:40:42,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-03 08:40:42,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-03 08:40:42,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-03 08:40:42,199 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-03 08:40:42,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:42,199 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-03 08:40:42,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-03 08:40:42,199 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-03 08:40:42,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-03 08:40:42,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:42,200 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-10-03 08:40:42,200 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:42,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:42,201 INFO L82 PathProgramCache]: Analyzing trace with hash -495171485, now seen corresponding path program 70 times [2018-10-03 08:40:42,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:42,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:42,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:42,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:42,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:44,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:44,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:44,462 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:44,565 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:44,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:44,571 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:44,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:44,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-03 08:40:44,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-03 08:40:44,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-03 08:40:44,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:40:44,627 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-10-03 08:40:44,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:44,822 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-03 08:40:44,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-03 08:40:44,822 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-10-03 08:40:44,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:44,823 INFO L225 Difference]: With dead ends: 77 [2018-10-03 08:40:44,823 INFO L226 Difference]: Without dead ends: 75 [2018-10-03 08:40:44,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-10-03 08:40:44,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-03 08:40:44,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-03 08:40:44,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-03 08:40:44,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-03 08:40:44,826 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-03 08:40:44,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:44,826 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-03 08:40:44,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-03 08:40:44,826 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-03 08:40:44,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-03 08:40:44,827 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:44,827 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-10-03 08:40:44,827 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:44,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:44,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1829554956, now seen corresponding path program 71 times [2018-10-03 08:40:44,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:44,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:44,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:44,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:44,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:47,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:47,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:47,315 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:47,480 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-03 08:40:47,480 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:47,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:47,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:47,559 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-03 08:40:47,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 08:40:47,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 08:40:47,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:40:47,561 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-10-03 08:40:47,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:47,722 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-03 08:40:47,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-03 08:40:47,723 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-10-03 08:40:47,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:47,724 INFO L225 Difference]: With dead ends: 78 [2018-10-03 08:40:47,724 INFO L226 Difference]: Without dead ends: 76 [2018-10-03 08:40:47,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:40:47,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-03 08:40:47,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-03 08:40:47,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-03 08:40:47,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-03 08:40:47,727 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-03 08:40:47,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:47,727 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-03 08:40:47,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 08:40:47,727 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-03 08:40:47,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-03 08:40:47,728 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:47,728 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-10-03 08:40:47,729 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:47,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:47,729 INFO L82 PathProgramCache]: Analyzing trace with hash 881630595, now seen corresponding path program 72 times [2018-10-03 08:40:47,729 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:47,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:47,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:47,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:47,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:49,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:49,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:49,772 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:49,931 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-03 08:40:49,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:49,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:50,017 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:50,017 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-03 08:40:50,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-03 08:40:50,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-03 08:40:50,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:40:50,019 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-10-03 08:40:50,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:50,155 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-03 08:40:50,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-03 08:40:50,156 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-10-03 08:40:50,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:50,157 INFO L225 Difference]: With dead ends: 79 [2018-10-03 08:40:50,157 INFO L226 Difference]: Without dead ends: 77 [2018-10-03 08:40:50,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-10-03 08:40:50,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-03 08:40:50,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-03 08:40:50,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-03 08:40:50,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-03 08:40:50,160 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-10-03 08:40:50,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:50,160 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-03 08:40:50,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-03 08:40:50,160 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-03 08:40:50,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-03 08:40:50,161 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:50,161 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-10-03 08:40:50,161 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:50,161 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:50,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1560746476, now seen corresponding path program 73 times [2018-10-03 08:40:50,161 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:50,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:50,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:50,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:50,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:52,554 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:52,554 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:52,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:52,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:52,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:52,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-03 08:40:52,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-03 08:40:52,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-03 08:40:52,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:40:52,727 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-10-03 08:40:52,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:52,894 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-03 08:40:52,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-03 08:40:52,894 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-10-03 08:40:52,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:52,895 INFO L225 Difference]: With dead ends: 80 [2018-10-03 08:40:52,895 INFO L226 Difference]: Without dead ends: 78 [2018-10-03 08:40:52,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:40:52,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-03 08:40:52,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-03 08:40:52,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-03 08:40:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-03 08:40:52,897 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-10-03 08:40:52,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:52,897 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-03 08:40:52,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-03 08:40:52,897 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-03 08:40:52,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-03 08:40:52,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:52,898 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-10-03 08:40:52,898 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:52,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:52,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1138502307, now seen corresponding path program 74 times [2018-10-03 08:40:52,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:52,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:52,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:52,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:52,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:52,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:54,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:54,996 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:54,996 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:55,003 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:55,108 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:55,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:55,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:55,191 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:55,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-03 08:40:55,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-03 08:40:55,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-03 08:40:55,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:40:55,194 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-10-03 08:40:55,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:55,515 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-03 08:40:55,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-03 08:40:55,515 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-10-03 08:40:55,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:55,516 INFO L225 Difference]: With dead ends: 81 [2018-10-03 08:40:55,516 INFO L226 Difference]: Without dead ends: 79 [2018-10-03 08:40:55,516 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:40:55,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-03 08:40:55,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-03 08:40:55,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-03 08:40:55,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-03 08:40:55,518 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-10-03 08:40:55,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:55,519 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-03 08:40:55,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-03 08:40:55,519 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-03 08:40:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-03 08:40:55,519 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:55,520 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-10-03 08:40:55,520 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:55,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:55,520 INFO L82 PathProgramCache]: Analyzing trace with hash 933834956, now seen corresponding path program 75 times [2018-10-03 08:40:55,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:55,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:55,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:55,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:55,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:57,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:57,972 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:57,981 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:58,173 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-03 08:40:58,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:58,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:58,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:58,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:58,237 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-03 08:40:58,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-03 08:40:58,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-03 08:40:58,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:40:58,239 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-10-03 08:40:58,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:58,405 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-03 08:40:58,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-03 08:40:58,405 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-10-03 08:40:58,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:58,406 INFO L225 Difference]: With dead ends: 82 [2018-10-03 08:40:58,406 INFO L226 Difference]: Without dead ends: 80 [2018-10-03 08:40:58,407 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:40:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-03 08:40:58,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-03 08:40:58,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-03 08:40:58,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-03 08:40:58,409 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-10-03 08:40:58,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:58,409 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-03 08:40:58,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-03 08:40:58,410 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-03 08:40:58,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-03 08:40:58,410 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:58,410 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-10-03 08:40:58,410 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:58,410 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:58,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1115885629, now seen corresponding path program 76 times [2018-10-03 08:40:58,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:58,411 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:58,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:58,412 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:58,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:00,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:00,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:00,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:00,649 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:41:00,757 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:41:00,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:00,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:00,819 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:00,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-03 08:41:00,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-03 08:41:00,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-03 08:41:00,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:41:00,821 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-10-03 08:41:01,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:01,482 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-03 08:41:01,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-03 08:41:01,483 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-10-03 08:41:01,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:01,484 INFO L225 Difference]: With dead ends: 83 [2018-10-03 08:41:01,484 INFO L226 Difference]: Without dead ends: 81 [2018-10-03 08:41:01,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-10-03 08:41:01,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-03 08:41:01,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-03 08:41:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-03 08:41:01,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-03 08:41:01,487 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-10-03 08:41:01,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:01,487 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-03 08:41:01,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-03 08:41:01,487 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-03 08:41:01,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-03 08:41:01,488 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:01,488 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-10-03 08:41:01,488 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:01,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:01,488 INFO L82 PathProgramCache]: Analyzing trace with hash -232714324, now seen corresponding path program 77 times [2018-10-03 08:41:01,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:01,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:01,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:01,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:01,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:03,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:03,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:03,893 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:41:04,079 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-03 08:41:04,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:04,089 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:04,144 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:04,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-03 08:41:04,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-03 08:41:04,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-03 08:41:04,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:41:04,146 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-10-03 08:41:04,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:04,278 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-10-03 08:41:04,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-03 08:41:04,278 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-10-03 08:41:04,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:04,279 INFO L225 Difference]: With dead ends: 84 [2018-10-03 08:41:04,279 INFO L226 Difference]: Without dead ends: 82 [2018-10-03 08:41:04,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:41:04,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-03 08:41:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-03 08:41:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-03 08:41:04,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-03 08:41:04,283 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-10-03 08:41:04,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:04,283 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-03 08:41:04,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-03 08:41:04,283 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-03 08:41:04,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-03 08:41:04,284 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:04,284 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-10-03 08:41:04,284 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:04,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:04,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1375792355, now seen corresponding path program 78 times [2018-10-03 08:41:04,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:04,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:04,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:04,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:04,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:06,884 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:06,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:06,891 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:41:07,082 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-03 08:41:07,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:07,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:07,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:07,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:07,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-03 08:41:07,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-03 08:41:07,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-03 08:41:07,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:41:07,162 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-10-03 08:41:07,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:07,562 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-03 08:41:07,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-03 08:41:07,563 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-10-03 08:41:07,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:07,564 INFO L225 Difference]: With dead ends: 85 [2018-10-03 08:41:07,564 INFO L226 Difference]: Without dead ends: 83 [2018-10-03 08:41:07,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-10-03 08:41:07,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-03 08:41:07,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-03 08:41:07,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-03 08:41:07,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-03 08:41:07,568 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-10-03 08:41:07,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:07,568 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-03 08:41:07,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-03 08:41:07,568 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-03 08:41:07,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-03 08:41:07,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:07,568 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-10-03 08:41:07,569 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:07,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:07,569 INFO L82 PathProgramCache]: Analyzing trace with hash -300108148, now seen corresponding path program 79 times [2018-10-03 08:41:07,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:07,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:07,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:07,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:07,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:09,913 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:09,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:09,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:10,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:10,092 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:10,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-03 08:41:10,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-03 08:41:10,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-03 08:41:10,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:41:10,094 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-10-03 08:41:10,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:10,261 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-03 08:41:10,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-03 08:41:10,262 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-10-03 08:41:10,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:10,262 INFO L225 Difference]: With dead ends: 86 [2018-10-03 08:41:10,262 INFO L226 Difference]: Without dead ends: 84 [2018-10-03 08:41:10,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:41:10,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-03 08:41:10,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-03 08:41:10,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-03 08:41:10,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-03 08:41:10,264 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-10-03 08:41:10,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:10,265 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-03 08:41:10,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-03 08:41:10,265 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-03 08:41:10,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-03 08:41:10,265 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:10,265 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-10-03 08:41:10,265 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:10,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:10,266 INFO L82 PathProgramCache]: Analyzing trace with hash -713416189, now seen corresponding path program 80 times [2018-10-03 08:41:10,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:10,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:10,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:10,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:10,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:13,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:13,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:13,052 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:41:13,164 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:41:13,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:13,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:13,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:13,250 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-03 08:41:13,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-03 08:41:13,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-03 08:41:13,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:41:13,252 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-10-03 08:41:13,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:13,819 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-03 08:41:13,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-03 08:41:13,819 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-10-03 08:41:13,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:13,819 INFO L225 Difference]: With dead ends: 87 [2018-10-03 08:41:13,819 INFO L226 Difference]: Without dead ends: 85 [2018-10-03 08:41:13,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:41:13,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-03 08:41:13,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-03 08:41:13,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-03 08:41:13,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-03 08:41:13,822 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-10-03 08:41:13,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:13,822 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-03 08:41:13,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-03 08:41:13,822 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-03 08:41:13,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-03 08:41:13,822 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:13,822 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-10-03 08:41:13,823 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:13,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:13,823 INFO L82 PathProgramCache]: Analyzing trace with hash -641063572, now seen corresponding path program 81 times [2018-10-03 08:41:13,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:13,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:13,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:13,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:13,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:16,300 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:16,300 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:16,307 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:41:16,514 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-03 08:41:16,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:16,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:16,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:16,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-03 08:41:16,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-03 08:41:16,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-03 08:41:16,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:41:16,583 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-10-03 08:41:16,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:16,776 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-03 08:41:16,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-03 08:41:16,776 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-10-03 08:41:16,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:16,777 INFO L225 Difference]: With dead ends: 88 [2018-10-03 08:41:16,777 INFO L226 Difference]: Without dead ends: 86 [2018-10-03 08:41:16,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:41:16,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-03 08:41:16,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-03 08:41:16,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-03 08:41:16,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-03 08:41:16,779 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-10-03 08:41:16,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:16,779 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-03 08:41:16,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-03 08:41:16,780 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-03 08:41:16,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-03 08:41:16,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:16,780 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-10-03 08:41:16,780 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:16,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:16,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1601867555, now seen corresponding path program 82 times [2018-10-03 08:41:16,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:16,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:16,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:16,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:16,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:19,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:19,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:19,556 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:19,566 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:41:19,680 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:41:19,680 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:19,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:19,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:19,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-03 08:41:19,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-03 08:41:19,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-03 08:41:19,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 08:41:19,770 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-10-03 08:41:19,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:19,993 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-03 08:41:19,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-03 08:41:19,993 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-10-03 08:41:19,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:19,994 INFO L225 Difference]: With dead ends: 89 [2018-10-03 08:41:19,994 INFO L226 Difference]: Without dead ends: 87 [2018-10-03 08:41:19,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-10-03 08:41:19,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-03 08:41:19,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-03 08:41:19,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-03 08:41:19,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-03 08:41:19,998 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-10-03 08:41:19,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:19,998 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-03 08:41:19,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-03 08:41:19,998 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-03 08:41:19,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-03 08:41:19,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:19,998 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-10-03 08:41:19,998 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:19,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:19,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1881711540, now seen corresponding path program 83 times [2018-10-03 08:41:19,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:19,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:19,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:19,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:20,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:22,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:22,978 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:22,978 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:22,986 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:41:23,195 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-03 08:41:23,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:23,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:23,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:23,265 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-03 08:41:23,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-03 08:41:23,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-03 08:41:23,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:41:23,266 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-10-03 08:41:23,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:23,599 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-10-03 08:41:23,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-03 08:41:23,599 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-10-03 08:41:23,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:23,600 INFO L225 Difference]: With dead ends: 90 [2018-10-03 08:41:23,600 INFO L226 Difference]: Without dead ends: 88 [2018-10-03 08:41:23,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:41:23,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-03 08:41:23,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-03 08:41:23,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-03 08:41:23,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-03 08:41:23,602 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-10-03 08:41:23,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:23,603 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-03 08:41:23,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-03 08:41:23,603 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-03 08:41:23,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-03 08:41:23,603 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:23,603 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-10-03 08:41:23,603 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:23,603 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:23,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1796486211, now seen corresponding path program 84 times [2018-10-03 08:41:23,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:23,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:23,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:23,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:23,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:26,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:26,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:26,216 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:26,223 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:41:26,429 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-03 08:41:26,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:26,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:26,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:26,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-03 08:41:26,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-03 08:41:26,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-03 08:41:26,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 08:41:26,501 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-10-03 08:41:26,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:26,716 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-03 08:41:26,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-03 08:41:26,716 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-10-03 08:41:26,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:26,717 INFO L225 Difference]: With dead ends: 91 [2018-10-03 08:41:26,717 INFO L226 Difference]: Without dead ends: 89 [2018-10-03 08:41:26,717 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-10-03 08:41:26,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-03 08:41:26,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-03 08:41:26,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-03 08:41:26,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-03 08:41:26,720 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-10-03 08:41:26,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:26,720 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-03 08:41:26,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-03 08:41:26,720 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-03 08:41:26,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-03 08:41:26,721 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:26,721 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-10-03 08:41:26,721 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:26,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:26,721 INFO L82 PathProgramCache]: Analyzing trace with hash -143500500, now seen corresponding path program 85 times [2018-10-03 08:41:26,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:26,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:26,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:26,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:26,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:26,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:29,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:29,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:29,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:30,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:30,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:30,131 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-03 08:41:30,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-03 08:41:30,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-03 08:41:30,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:41:30,133 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-10-03 08:41:30,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:30,667 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-03 08:41:30,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-03 08:41:30,667 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-10-03 08:41:30,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:30,668 INFO L225 Difference]: With dead ends: 92 [2018-10-03 08:41:30,668 INFO L226 Difference]: Without dead ends: 90 [2018-10-03 08:41:30,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:41:30,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-03 08:41:30,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-03 08:41:30,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-03 08:41:30,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-03 08:41:30,670 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-10-03 08:41:30,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:30,671 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-03 08:41:30,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-03 08:41:30,671 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-03 08:41:30,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-03 08:41:30,671 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:30,672 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-10-03 08:41:30,672 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:30,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:30,672 INFO L82 PathProgramCache]: Analyzing trace with hash -153546397, now seen corresponding path program 86 times [2018-10-03 08:41:30,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:30,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:30,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:30,673 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:30,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:33,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:33,791 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:33,799 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:41:33,917 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:41:33,918 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:33,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:33,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:33,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-03 08:41:33,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-03 08:41:33,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-03 08:41:33,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:41:33,988 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-10-03 08:41:34,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:34,200 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-03 08:41:34,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-03 08:41:34,200 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-10-03 08:41:34,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:34,201 INFO L225 Difference]: With dead ends: 93 [2018-10-03 08:41:34,201 INFO L226 Difference]: Without dead ends: 91 [2018-10-03 08:41:34,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:41:34,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-03 08:41:34,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-03 08:41:34,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-03 08:41:34,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-03 08:41:34,203 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-10-03 08:41:34,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:34,203 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-03 08:41:34,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-03 08:41:34,204 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-03 08:41:34,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-03 08:41:34,204 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:34,204 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-10-03 08:41:34,204 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:34,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:34,204 INFO L82 PathProgramCache]: Analyzing trace with hash -464969204, now seen corresponding path program 87 times [2018-10-03 08:41:34,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:34,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:34,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:34,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:34,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:37,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:37,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:37,057 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:41:37,296 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-03 08:41:37,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:37,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:37,365 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:37,365 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-03 08:41:37,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-03 08:41:37,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-03 08:41:37,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:41:37,367 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-10-03 08:41:37,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:37,647 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-03 08:41:37,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-03 08:41:37,647 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-10-03 08:41:37,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:37,648 INFO L225 Difference]: With dead ends: 94 [2018-10-03 08:41:37,648 INFO L226 Difference]: Without dead ends: 92 [2018-10-03 08:41:37,648 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 [2018-10-03 08:41:37,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-03 08:41:37,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-03 08:41:37,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-03 08:41:37,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-03 08:41:37,650 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-10-03 08:41:37,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:37,651 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-03 08:41:37,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-03 08:41:37,651 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-03 08:41:37,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-03 08:41:37,651 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:37,651 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-10-03 08:41:37,651 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:37,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:37,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1529141629, now seen corresponding path program 88 times [2018-10-03 08:41:37,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:37,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:37,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:37,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:37,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:40,516 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:40,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:40,523 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:41:40,647 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:41:40,648 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:40,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:40,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:40,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:40,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-03 08:41:40,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-03 08:41:40,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-03 08:41:40,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-03 08:41:40,719 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-10-03 08:41:40,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:40,867 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-03 08:41:40,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-03 08:41:40,867 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-10-03 08:41:40,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:40,868 INFO L225 Difference]: With dead ends: 95 [2018-10-03 08:41:40,868 INFO L226 Difference]: Without dead ends: 93 [2018-10-03 08:41:40,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-10-03 08:41:40,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-03 08:41:40,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-03 08:41:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-03 08:41:40,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-03 08:41:40,871 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-10-03 08:41:40,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:40,871 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-03 08:41:40,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-03 08:41:40,871 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-03 08:41:40,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-03 08:41:40,871 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:40,871 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-10-03 08:41:40,871 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:40,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:40,872 INFO L82 PathProgramCache]: Analyzing trace with hash -158748436, now seen corresponding path program 89 times [2018-10-03 08:41:40,872 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:40,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:40,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:40,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:40,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:44,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:44,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:44,087 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:41:44,317 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-03 08:41:44,317 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:44,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:44,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:44,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-03 08:41:44,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-03 08:41:44,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-03 08:41:44,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:41:44,396 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-10-03 08:41:44,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:44,631 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-10-03 08:41:44,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-03 08:41:44,631 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-10-03 08:41:44,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:44,632 INFO L225 Difference]: With dead ends: 96 [2018-10-03 08:41:44,632 INFO L226 Difference]: Without dead ends: 94 [2018-10-03 08:41:44,633 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 [2018-10-03 08:41:44,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-03 08:41:44,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-03 08:41:44,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-03 08:41:44,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-03 08:41:44,635 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-10-03 08:41:44,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:44,635 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-03 08:41:44,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-03 08:41:44,635 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-03 08:41:44,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-03 08:41:44,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:44,635 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-10-03 08:41:44,636 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:44,636 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:44,636 INFO L82 PathProgramCache]: Analyzing trace with hash -626232413, now seen corresponding path program 90 times [2018-10-03 08:41:44,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:44,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:44,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:44,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:44,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:47,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:47,908 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:47,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:47,916 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:41:48,151 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-03 08:41:48,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:48,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:48,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:48,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:48,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-03 08:41:48,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-03 08:41:48,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-03 08:41:48,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-03 08:41:48,228 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-10-03 08:41:48,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:48,476 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-03 08:41:48,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-03 08:41:48,477 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-10-03 08:41:48,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:48,477 INFO L225 Difference]: With dead ends: 97 [2018-10-03 08:41:48,477 INFO L226 Difference]: Without dead ends: 95 [2018-10-03 08:41:48,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-10-03 08:41:48,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-03 08:41:48,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-03 08:41:48,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-03 08:41:48,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-03 08:41:48,481 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-10-03 08:41:48,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:48,481 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-03 08:41:48,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-03 08:41:48,481 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-03 08:41:48,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-03 08:41:48,482 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:48,482 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-10-03 08:41:48,482 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:48,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:48,482 INFO L82 PathProgramCache]: Analyzing trace with hash 2061633484, now seen corresponding path program 91 times [2018-10-03 08:41:48,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:48,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:48,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:48,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:48,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:51,592 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:51,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:51,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:51,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:51,802 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:51,802 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-03 08:41:51,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-03 08:41:51,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-03 08:41:51,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:41:51,804 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-10-03 08:41:52,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:52,042 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-03 08:41:52,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-03 08:41:52,042 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-10-03 08:41:52,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:52,043 INFO L225 Difference]: With dead ends: 98 [2018-10-03 08:41:52,043 INFO L226 Difference]: Without dead ends: 96 [2018-10-03 08:41:52,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:41:52,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-03 08:41:52,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-03 08:41:52,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-03 08:41:52,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-03 08:41:52,045 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-10-03 08:41:52,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:52,046 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-03 08:41:52,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-03 08:41:52,046 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-03 08:41:52,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-03 08:41:52,046 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:52,046 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-10-03 08:41:52,046 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:52,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:52,047 INFO L82 PathProgramCache]: Analyzing trace with hash -513869629, now seen corresponding path program 92 times [2018-10-03 08:41:52,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:52,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:52,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:52,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:52,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:55,478 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:55,478 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:55,486 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:41:55,614 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:41:55,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:55,625 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:55,713 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:55,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-03 08:41:55,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-03 08:41:55,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-03 08:41:55,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-10-03 08:41:55,715 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-10-03 08:41:55,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:55,947 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-03 08:41:55,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-03 08:41:55,947 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-10-03 08:41:55,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:55,948 INFO L225 Difference]: With dead ends: 99 [2018-10-03 08:41:55,948 INFO L226 Difference]: Without dead ends: 97 [2018-10-03 08:41:55,948 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 [2018-10-03 08:41:55,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-03 08:41:55,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-03 08:41:55,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-03 08:41:55,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-03 08:41:55,950 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-10-03 08:41:55,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:55,950 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-03 08:41:55,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-03 08:41:55,951 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-03 08:41:55,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-03 08:41:55,951 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:55,951 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-10-03 08:41:55,951 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:55,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:55,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1249912492, now seen corresponding path program 93 times [2018-10-03 08:41:55,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:55,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:55,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:55,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:55,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:00,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:00,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:00,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:00,287 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:42:00,543 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-03 08:42:00,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:00,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:00,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:00,617 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-03 08:42:00,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-03 08:42:00,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-03 08:42:00,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-03 08:42:00,618 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-10-03 08:42:00,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:00,817 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-03 08:42:00,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-03 08:42:00,818 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-10-03 08:42:00,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:00,819 INFO L225 Difference]: With dead ends: 100 [2018-10-03 08:42:00,819 INFO L226 Difference]: Without dead ends: 98 [2018-10-03 08:42:00,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-10-03 08:42:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-03 08:42:00,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-03 08:42:00,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-03 08:42:00,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-03 08:42:00,822 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-10-03 08:42:00,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:00,822 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-03 08:42:00,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-03 08:42:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-03 08:42:00,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-03 08:42:00,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:00,823 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-10-03 08:42:00,823 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:00,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:00,823 INFO L82 PathProgramCache]: Analyzing trace with hash 92583395, now seen corresponding path program 94 times [2018-10-03 08:42:00,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:00,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:00,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:00,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:00,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:04,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:04,469 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:04,477 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:42:04,607 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:42:04,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:04,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:04,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:04,681 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-03 08:42:04,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-03 08:42:04,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-03 08:42:04,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-03 08:42:04,682 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-10-03 08:42:04,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:04,900 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-03 08:42:04,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-03 08:42:04,901 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-10-03 08:42:04,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:04,901 INFO L225 Difference]: With dead ends: 101 [2018-10-03 08:42:04,901 INFO L226 Difference]: Without dead ends: 99 [2018-10-03 08:42:04,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-10-03 08:42:04,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-03 08:42:04,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-03 08:42:04,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-03 08:42:04,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-03 08:42:04,905 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-10-03 08:42:04,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:04,905 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-03 08:42:04,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-03 08:42:04,905 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-03 08:42:04,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-03 08:42:04,906 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:04,906 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-10-03 08:42:04,906 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:04,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:04,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1424880244, now seen corresponding path program 95 times [2018-10-03 08:42:04,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:04,907 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:04,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:04,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:04,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:08,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:08,509 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:08,517 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:42:08,776 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-03 08:42:08,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:08,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:08,856 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:08,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-03 08:42:08,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-03 08:42:08,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-03 08:42:08,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:42:08,858 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-10-03 08:42:09,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:09,489 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-03 08:42:09,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-03 08:42:09,489 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-10-03 08:42:09,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:09,490 INFO L225 Difference]: With dead ends: 102 [2018-10-03 08:42:09,490 INFO L226 Difference]: Without dead ends: 100 [2018-10-03 08:42:09,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:42:09,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-03 08:42:09,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-03 08:42:09,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-03 08:42:09,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-03 08:42:09,493 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-10-03 08:42:09,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:09,493 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-03 08:42:09,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-03 08:42:09,493 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-03 08:42:09,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-03 08:42:09,494 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:09,494 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-10-03 08:42:09,494 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:09,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:09,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1221612797, now seen corresponding path program 96 times [2018-10-03 08:42:09,494 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:09,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:09,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:09,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:09,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:09,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:12,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:12,915 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:12,923 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:42:13,189 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-03 08:42:13,189 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:13,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:13,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:13,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:13,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-03 08:42:13,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-03 08:42:13,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-03 08:42:13,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-03 08:42:13,289 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-10-03 08:42:13,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:13,613 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-03 08:42:13,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-03 08:42:13,614 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-10-03 08:42:13,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:13,614 INFO L225 Difference]: With dead ends: 103 [2018-10-03 08:42:13,614 INFO L226 Difference]: Without dead ends: 101 [2018-10-03 08:42:13,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-10-03 08:42:13,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-03 08:42:13,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-03 08:42:13,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-03 08:42:13,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-03 08:42:13,617 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-10-03 08:42:13,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:13,617 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-03 08:42:13,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-03 08:42:13,617 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-03 08:42:13,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-03 08:42:13,618 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:13,618 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-10-03 08:42:13,618 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:13,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:13,618 INFO L82 PathProgramCache]: Analyzing trace with hash 784710764, now seen corresponding path program 97 times [2018-10-03 08:42:13,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:13,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:13,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:13,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:13,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:13,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:17,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:17,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:17,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:17,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:17,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:17,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:17,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-03 08:42:17,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-03 08:42:17,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-03 08:42:17,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-03 08:42:17,379 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-10-03 08:42:17,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:17,661 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-10-03 08:42:17,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-03 08:42:17,661 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-10-03 08:42:17,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:17,662 INFO L225 Difference]: With dead ends: 104 [2018-10-03 08:42:17,662 INFO L226 Difference]: Without dead ends: 102 [2018-10-03 08:42:17,662 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-10-03 08:42:17,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-03 08:42:17,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-03 08:42:17,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-03 08:42:17,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-03 08:42:17,665 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-10-03 08:42:17,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:17,665 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-03 08:42:17,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-03 08:42:17,665 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-03 08:42:17,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-03 08:42:17,665 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:17,666 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-10-03 08:42:17,666 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:17,666 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:17,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1443768285, now seen corresponding path program 98 times [2018-10-03 08:42:17,666 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:17,666 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:17,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:17,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:17,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:17,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:21,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:21,550 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:21,557 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:42:21,699 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:42:21,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:21,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:21,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:21,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:21,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-03 08:42:21,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-03 08:42:21,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-03 08:42:21,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-03 08:42:21,778 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-10-03 08:42:22,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:22,004 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-03 08:42:22,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-03 08:42:22,005 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-10-03 08:42:22,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:22,005 INFO L225 Difference]: With dead ends: 105 [2018-10-03 08:42:22,005 INFO L226 Difference]: Without dead ends: 103 [2018-10-03 08:42:22,006 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-10-03 08:42:22,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-03 08:42:22,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-03 08:42:22,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-03 08:42:22,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-03 08:42:22,008 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-10-03 08:42:22,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:22,008 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-03 08:42:22,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-03 08:42:22,009 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-03 08:42:22,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-03 08:42:22,009 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:22,009 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-10-03 08:42:22,009 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:22,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:22,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1807142068, now seen corresponding path program 99 times [2018-10-03 08:42:22,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:22,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:22,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:22,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:22,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:22,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:25,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:25,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:25,945 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:42:26,239 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-03 08:42:26,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:26,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:26,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:26,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-03 08:42:26,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-03 08:42:26,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-03 08:42:26,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:42:26,317 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-10-03 08:42:26,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:26,605 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-03 08:42:26,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-03 08:42:26,605 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-10-03 08:42:26,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:26,606 INFO L225 Difference]: With dead ends: 106 [2018-10-03 08:42:26,606 INFO L226 Difference]: Without dead ends: 104 [2018-10-03 08:42:26,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:42:26,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-03 08:42:26,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-03 08:42:26,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-03 08:42:26,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-03 08:42:26,609 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-10-03 08:42:26,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:26,609 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-03 08:42:26,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-03 08:42:26,610 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-03 08:42:26,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-03 08:42:26,610 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:26,610 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-10-03 08:42:26,610 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:26,610 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:26,610 INFO L82 PathProgramCache]: Analyzing trace with hash -186827453, now seen corresponding path program 100 times [2018-10-03 08:42:26,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:26,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:26,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:26,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:26,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:30,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:30,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:30,728 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:42:30,871 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:42:30,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:30,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:30,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:30,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-03 08:42:30,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-03 08:42:30,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-03 08:42:30,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-03 08:42:30,953 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-10-03 08:42:31,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:31,158 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-03 08:42:31,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-03 08:42:31,158 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-10-03 08:42:31,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:31,160 INFO L225 Difference]: With dead ends: 107 [2018-10-03 08:42:31,160 INFO L226 Difference]: Without dead ends: 105 [2018-10-03 08:42:31,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-03 08:42:31,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-03 08:42:31,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-03 08:42:31,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-03 08:42:31,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-03 08:42:31,164 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-10-03 08:42:31,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:31,165 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-03 08:42:31,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-03 08:42:31,165 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-03 08:42:31,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-03 08:42:31,165 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:31,166 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-10-03 08:42:31,166 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:31,166 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:31,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1496681940, now seen corresponding path program 101 times [2018-10-03 08:42:31,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:31,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:31,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:31,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:31,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:31,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:35,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:35,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:35,411 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:42:35,699 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-10-03 08:42:35,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:35,714 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:35,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:35,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-03 08:42:35,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-03 08:42:35,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-03 08:42:35,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-03 08:42:35,786 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-10-03 08:42:36,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:36,029 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-10-03 08:42:36,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-03 08:42:36,029 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-10-03 08:42:36,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:36,030 INFO L225 Difference]: With dead ends: 108 [2018-10-03 08:42:36,030 INFO L226 Difference]: Without dead ends: 106 [2018-10-03 08:42:36,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-10-03 08:42:36,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-03 08:42:36,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-03 08:42:36,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-03 08:42:36,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-03 08:42:36,034 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-10-03 08:42:36,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:36,034 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-03 08:42:36,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-03 08:42:36,035 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-03 08:42:36,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-03 08:42:36,035 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:36,035 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-10-03 08:42:36,036 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:36,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:36,036 INFO L82 PathProgramCache]: Analyzing trace with hash 847501923, now seen corresponding path program 102 times [2018-10-03 08:42:36,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:36,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:36,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:36,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:36,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:40,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:40,148 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:40,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:40,158 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:42:40,457 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-10-03 08:42:40,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:40,469 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:40,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:40,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:40,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-03 08:42:40,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-03 08:42:40,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-03 08:42:40,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-10-03 08:42:40,540 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-10-03 08:42:40,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:40,831 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-03 08:42:40,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-03 08:42:40,831 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-10-03 08:42:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:40,832 INFO L225 Difference]: With dead ends: 109 [2018-10-03 08:42:40,832 INFO L226 Difference]: Without dead ends: 107 [2018-10-03 08:42:40,833 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 [2018-10-03 08:42:40,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-03 08:42:40,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-03 08:42:40,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-03 08:42:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-03 08:42:40,835 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-10-03 08:42:40,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:40,835 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-03 08:42:40,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-03 08:42:40,835 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-03 08:42:40,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-03 08:42:40,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:40,836 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-10-03 08:42:40,837 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:40,837 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:40,837 INFO L82 PathProgramCache]: Analyzing trace with hash 502757644, now seen corresponding path program 103 times [2018-10-03 08:42:40,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:40,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:40,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:40,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:40,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:45,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:45,114 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:45,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:45,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:45,277 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:45,359 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:45,359 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-03 08:42:45,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-03 08:42:45,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-03 08:42:45,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-03 08:42:45,361 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-10-03 08:42:45,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:45,684 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-03 08:42:45,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-03 08:42:45,685 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-10-03 08:42:45,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:45,685 INFO L225 Difference]: With dead ends: 110 [2018-10-03 08:42:45,685 INFO L226 Difference]: Without dead ends: 108 [2018-10-03 08:42:45,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-10-03 08:42:45,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-03 08:42:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-03 08:42:45,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-03 08:42:45,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-03 08:42:45,688 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-10-03 08:42:45,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:45,689 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-03 08:42:45,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-03 08:42:45,689 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-03 08:42:45,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-03 08:42:45,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:45,690 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-10-03 08:42:45,690 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:45,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:45,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1594380413, now seen corresponding path program 104 times [2018-10-03 08:42:45,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:45,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:45,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:45,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:45,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:49,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:49,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:49,991 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:42:50,158 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:42:50,159 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:50,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:50,247 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:50,247 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-03 08:42:50,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-03 08:42:50,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-03 08:42:50,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-10-03 08:42:50,248 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-10-03 08:42:50,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:50,439 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-03 08:42:50,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-03 08:42:50,440 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-10-03 08:42:50,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:50,440 INFO L225 Difference]: With dead ends: 111 [2018-10-03 08:42:50,440 INFO L226 Difference]: Without dead ends: 109 [2018-10-03 08:42:50,441 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 [2018-10-03 08:42:50,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-03 08:42:50,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-03 08:42:50,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-03 08:42:50,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-03 08:42:50,444 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-10-03 08:42:50,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:50,444 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-03 08:42:50,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-03 08:42:50,444 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-03 08:42:50,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-03 08:42:50,445 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:50,445 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-10-03 08:42:50,445 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:50,445 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:50,445 INFO L82 PathProgramCache]: Analyzing trace with hash 2113816556, now seen corresponding path program 105 times [2018-10-03 08:42:50,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:50,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:50,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:50,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:50,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:54,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:54,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:54,810 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:42:55,123 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-10-03 08:42:55,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:55,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:55,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:55,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:55,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-03 08:42:55,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-03 08:42:55,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-03 08:42:55,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-03 08:42:55,207 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-10-03 08:42:55,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:55,538 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-03 08:42:55,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-03 08:42:55,538 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-10-03 08:42:55,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:55,539 INFO L225 Difference]: With dead ends: 112 [2018-10-03 08:42:55,539 INFO L226 Difference]: Without dead ends: 110 [2018-10-03 08:42:55,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-10-03 08:42:55,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-03 08:42:55,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-03 08:42:55,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-03 08:42:55,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-03 08:42:55,541 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-10-03 08:42:55,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:55,541 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-03 08:42:55,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-03 08:42:55,541 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-03 08:42:55,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-03 08:42:55,542 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:55,542 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-10-03 08:42:55,542 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:55,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:55,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1103805603, now seen corresponding path program 106 times [2018-10-03 08:42:55,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:55,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:55,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:55,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:55,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:00,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:00,097 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:00,104 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:43:00,254 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:43:00,255 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:00,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:00,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:00,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-10-03 08:43:00,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-03 08:43:00,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-03 08:43:00,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-03 08:43:00,340 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-10-03 08:43:00,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:00,695 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-03 08:43:00,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-03 08:43:00,695 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-10-03 08:43:00,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:00,696 INFO L225 Difference]: With dead ends: 113 [2018-10-03 08:43:00,696 INFO L226 Difference]: Without dead ends: 111 [2018-10-03 08:43:00,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-10-03 08:43:00,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-03 08:43:00,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-03 08:43:00,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-03 08:43:00,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-03 08:43:00,699 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-10-03 08:43:00,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:00,699 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-03 08:43:00,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-03 08:43:00,699 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-03 08:43:00,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-03 08:43:00,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:00,700 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-10-03 08:43:00,700 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:00,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:00,700 INFO L82 PathProgramCache]: Analyzing trace with hash -141762868, now seen corresponding path program 107 times [2018-10-03 08:43:00,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:00,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:00,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:00,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:00,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:43:05,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:05,229 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:43:05,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:43:05,238 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:43:05,540 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-03 08:43:05,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:43:05,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:43:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:43:05,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:43:05,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-10-03 08:43:05,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-03 08:43:05,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-03 08:43:05,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-03 08:43:05,632 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-10-03 08:43:05,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:43:05,954 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-10-03 08:43:05,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-03 08:43:05,954 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-10-03 08:43:05,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:43:05,954 INFO L225 Difference]: With dead ends: 114 [2018-10-03 08:43:05,955 INFO L226 Difference]: Without dead ends: 112 [2018-10-03 08:43:05,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-10-03 08:43:05,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-03 08:43:05,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-03 08:43:05,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-03 08:43:05,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-03 08:43:05,957 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-10-03 08:43:05,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:43:05,957 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-03 08:43:05,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-03 08:43:05,957 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-03 08:43:05,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-03 08:43:05,958 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:43:05,958 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-10-03 08:43:05,958 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:43:05,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:43:05,958 INFO L82 PathProgramCache]: Analyzing trace with hash -99679805, now seen corresponding path program 108 times [2018-10-03 08:43:05,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:43:05,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:43:05,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:05,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:43:05,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:43:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-10-03 08:43:06,779 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 08:43:06,784 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 08:43:06,785 INFO L202 PluginConnector]: Adding new model functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 08:43:06 BoogieIcfgContainer [2018-10-03 08:43:06,785 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 08:43:06,786 INFO L168 Benchmark]: Toolchain (without parser) took 233625.25 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 201.9 MB). Free memory was 1.4 GB in the beginning and 977.9 MB in the end (delta: 465.8 MB). Peak memory consumption was 667.6 MB. Max. memory is 7.1 GB. [2018-10-03 08:43:06,787 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:43:06,787 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.12 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:43:06,787 INFO L168 Benchmark]: Boogie Preprocessor took 17.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:43:06,788 INFO L168 Benchmark]: RCFGBuilder took 271.52 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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. [2018-10-03 08:43:06,788 INFO L168 Benchmark]: TraceAbstraction took 233290.34 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 201.9 MB). Free memory was 1.4 GB in the beginning and 977.9 MB in the end (delta: 444.6 MB). Peak memory consumption was 646.5 MB. Max. memory is 7.1 GB. [2018-10-03 08:43:06,790 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 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.12 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 17.25 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 271.52 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 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 233290.34 ms. Allocated memory was 1.5 GB in the beginning and 1.7 GB in the end (delta: 201.9 MB). Free memory was 1.4 GB in the beginning and 977.9 MB in the end (delta: 444.6 MB). Peak memory consumption was 646.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 42]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 42). Cancelled while BasicCegarLoop was analyzing trace of length 112 with TraceHistMax 108, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 45 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 233.2s OverallTime, 109 OverallIterations, 108 TraceHistogramMax, 21.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 324 SDtfs, 0 SDslu, 4569 SDs, 0 SdLazy, 10563 SolverSat, 160 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11986 GetRequests, 6100 SyntacticMatches, 0 SemanticMatches, 5886 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 183.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=108, 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, 108 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.6s SsaConstructionTime, 12.0s SatisfiabilityAnalysisTime, 192.3s InterpolantComputationTime, 12201 NumberOfCodeBlocks, 12201 NumberOfCodeBlocksAsserted, 1718 NumberOfCheckSat, 11986 ConstructedInterpolants, 0 QuantifiedInterpolants, 2601820 SizeOfPredicates, 17441 NumberOfNonLiveVariables, 59492 ConjunctsInSsa, 23326 ConjunctsInUnsatCore, 215 InterpolantComputations, 1 PerfectInterpolantSequences, 0/419868 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/functions1.i_3.bplTransformedIcfg_BEv2_8.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-03_08-43-06-798.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/functions1.i_3.bplTransformedIcfg_BEv2_8.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_08-43-06-798.csv Completed graceful shutdown