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/const1.i_3.bplTransformedIcfg_BEv2_6.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-bd42740 [2018-09-23 21:18:17,185 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 21:18:17,189 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 21:18:17,207 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 21:18:17,208 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 21:18:17,210 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 21:18:17,211 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 21:18:17,215 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 21:18:17,218 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 21:18:17,219 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 21:18:17,222 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-23 21:18:17,222 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-23 21:18:17,223 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-23 21:18:17,224 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-23 21:18:17,233 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-23 21:18:17,234 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-23 21:18:17,238 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-23 21:18:17,240 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-23 21:18:17,241 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-23 21:18:17,243 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-23 21:18:17,244 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-23 21:18:17,246 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-23 21:18:17,248 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-23 21:18:17,256 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 21:18:17,287 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 21:18:17,287 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 21:18:17,288 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 21:18:17,288 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 21:18:17,290 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 21:18:17,290 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 21:18:17,290 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 21:18:17,291 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 21:18:17,292 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 21:18:17,292 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 21:18:17,292 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 21:18:17,292 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 21:18:17,292 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 21:18:17,292 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 21:18:17,293 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 21:18:17,293 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 21:18:17,293 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 21:18:17,293 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 21:18:17,295 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 21:18:17,295 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 21:18:17,295 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 21:18:17,295 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 21:18:17,295 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:18:17,296 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 21:18:17,296 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 21:18:17,296 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 21:18:17,296 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 21:18:17,296 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 21:18:17,297 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 21:18:17,297 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 21:18:17,362 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 21:18:17,378 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 21:18:17,383 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 21:18:17,385 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 21:18:17,386 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 21:18:17,386 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/const1.i_3.bplTransformedIcfg_BEv2_6.bpl [2018-09-23 21:18:17,387 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/const1.i_3.bplTransformedIcfg_BEv2_6.bpl' [2018-09-23 21:18:17,449 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 21:18:17,452 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 21:18:17,453 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 21:18:17,453 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 21:18:17,453 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 21:18:17,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:18:17" (1/1) ... [2018-09-23 21:18:17,490 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:18:17" (1/1) ... [2018-09-23 21:18:17,498 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 21:18:17,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 21:18:17,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 21:18:17,499 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 21:18:17,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:18:17" (1/1) ... [2018-09-23 21:18:17,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:18:17" (1/1) ... [2018-09-23 21:18:17,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:18:17" (1/1) ... [2018-09-23 21:18:17,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:18:17" (1/1) ... [2018-09-23 21:18:17,515 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:18:17" (1/1) ... [2018-09-23 21:18:17,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:18:17" (1/1) ... [2018-09-23 21:18:17,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:18:17" (1/1) ... [2018-09-23 21:18:17,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 21:18:17,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 21:18:17,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 21:18:17,523 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 21:18:17,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:18:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:18:17,603 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-23 21:18:17,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 21:18:17,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 21:18:17,798 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 21:18:17,798 INFO L202 PluginConnector]: Adding new model const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:18:17 BoogieIcfgContainer [2018-09-23 21:18:17,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 21:18:17,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 21:18:17,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 21:18:17,803 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 21:18:17,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:18:17" (1/2) ... [2018-09-23 21:18:17,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8694dd and model type const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 09:18:17, skipping insertion in model container [2018-09-23 21:18:17,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:18:17" (2/2) ... [2018-09-23 21:18:17,806 INFO L112 eAbstractionObserver]: Analyzing ICFG const1.i_3.bplTransformedIcfg_BEv2_6.bpl [2018-09-23 21:18:17,816 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 21:18:17,824 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 21:18:17,875 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 21:18:17,876 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 21:18:17,876 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 21:18:17,876 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 21:18:17,876 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 21:18:17,876 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 21:18:17,877 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 21:18:17,877 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 21:18:17,877 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 21:18:17,892 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-23 21:18:17,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-23 21:18:17,899 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:17,900 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-23 21:18:17,901 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:17,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:17,908 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-09-23 21:18:17,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:17,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:17,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:17,959 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:17,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:18,054 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:18:18,054 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 21:18:18,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:18:18,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:18:18,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:18:18,076 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-23 21:18:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:18,121 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-09-23 21:18:18,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:18:18,124 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-23 21:18:18,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:18,134 INFO L225 Difference]: With dead ends: 9 [2018-09-23 21:18:18,134 INFO L226 Difference]: Without dead ends: 5 [2018-09-23 21:18:18,138 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:18:18,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-23 21:18:18,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-23 21:18:18,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-23 21:18:18,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-23 21:18:18,178 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-23 21:18:18,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:18,179 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-23 21:18:18,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:18:18,179 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-23 21:18:18,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 21:18:18,179 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:18,180 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-23 21:18:18,180 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:18,180 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:18,181 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2018-09-23 21:18:18,181 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:18,181 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:18,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:18,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:18,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:18,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:18,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:18,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:18,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:18,386 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:18,386 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-23 21:18:18,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 21:18:18,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 21:18:18,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:18:18,388 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-09-23 21:18:18,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:18,503 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-23 21:18:18,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 21:18:18,505 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-09-23 21:18:18,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:18,505 INFO L225 Difference]: With dead ends: 8 [2018-09-23 21:18:18,507 INFO L226 Difference]: Without dead ends: 6 [2018-09-23 21:18:18,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:18:18,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-23 21:18:18,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-23 21:18:18,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-23 21:18:18,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-23 21:18:18,512 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-23 21:18:18,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:18,512 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-23 21:18:18,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 21:18:18,513 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-23 21:18:18,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 21:18:18,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:18,513 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-23 21:18:18,514 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:18,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:18,514 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2018-09-23 21:18:18,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:18,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:18,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:18,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:18,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:18,752 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:18,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:18,761 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:18:18,775 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:18:18,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:18,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:18,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:18,804 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:18,804 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 21:18:18,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 21:18:18,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 21:18:18,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:18:18,806 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-09-23 21:18:18,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:18,858 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-23 21:18:18,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:18:18,859 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-23 21:18:18,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:18,859 INFO L225 Difference]: With dead ends: 9 [2018-09-23 21:18:18,859 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 21:18:18,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:18:18,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 21:18:18,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 21:18:18,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 21:18:18,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-23 21:18:18,863 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-23 21:18:18,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:18,863 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-23 21:18:18,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 21:18:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-23 21:18:18,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 21:18:18,864 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:18,864 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-23 21:18:18,865 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:18,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:18,865 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2018-09-23 21:18:18,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:18,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:18,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:18,867 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:18,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:18,982 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:18,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:18,991 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:18:19,006 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 21:18:19,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:19,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:19,045 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:19,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-23 21:18:19,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:18:19,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:18:19,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:18:19,047 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-09-23 21:18:19,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:19,112 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-23 21:18:19,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:18:19,113 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-09-23 21:18:19,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:19,113 INFO L225 Difference]: With dead ends: 10 [2018-09-23 21:18:19,113 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 21:18:19,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:18:19,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 21:18:19,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 21:18:19,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 21:18:19,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-23 21:18:19,117 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-23 21:18:19,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:19,118 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-23 21:18:19,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:18:19,118 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-23 21:18:19,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 21:18:19,119 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:19,119 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-23 21:18:19,119 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:19,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:19,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894467, now seen corresponding path program 4 times [2018-09-23 21:18:19,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:19,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:19,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:19,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:19,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:19,415 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:19,416 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:19,426 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:18:19,458 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:18:19,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:19,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:19,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:19,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 21:18:19,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 21:18:19,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 21:18:19,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:18:19,490 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-09-23 21:18:19,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:19,549 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 21:18:19,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 21:18:19,550 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-23 21:18:19,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:19,550 INFO L225 Difference]: With dead ends: 11 [2018-09-23 21:18:19,551 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 21:18:19,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:18:19,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 21:18:19,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 21:18:19,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 21:18:19,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-23 21:18:19,555 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-23 21:18:19,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:19,556 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-23 21:18:19,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 21:18:19,556 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-23 21:18:19,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 21:18:19,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:19,557 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-23 21:18:19,557 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:19,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:19,558 INFO L82 PathProgramCache]: Analyzing trace with hash 317188140, now seen corresponding path program 5 times [2018-09-23 21:18:19,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:19,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:19,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:19,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:19,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:19,734 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:19,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:19,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:19,743 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:18:19,798 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 21:18:19,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:19,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:19,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:19,838 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 21:18:19,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:18:19,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:18:19,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:18:19,840 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-09-23 21:18:19,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:19,932 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-23 21:18:19,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:18:19,938 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-09-23 21:18:19,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:19,938 INFO L225 Difference]: With dead ends: 12 [2018-09-23 21:18:19,939 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 21:18:19,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:18:19,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 21:18:19,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 21:18:19,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 21:18:19,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-23 21:18:19,949 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-23 21:18:19,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:19,949 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-23 21:18:19,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:18:19,949 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-23 21:18:19,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 21:18:19,950 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:19,950 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-23 21:18:19,950 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:19,951 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:19,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1242899555, now seen corresponding path program 6 times [2018-09-23 21:18:19,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:19,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:19,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:19,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:19,955 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:20,078 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:20,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:20,097 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:18:20,116 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-23 21:18:20,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:20,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:20,153 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:20,154 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-23 21:18:20,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 21:18:20,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 21:18:20,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:18:20,155 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-09-23 21:18:20,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:20,192 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-23 21:18:20,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:18:20,192 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-09-23 21:18:20,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:20,193 INFO L225 Difference]: With dead ends: 13 [2018-09-23 21:18:20,193 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 21:18:20,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:18:20,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 21:18:20,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 21:18:20,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 21:18:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-23 21:18:20,197 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-23 21:18:20,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:20,197 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-23 21:18:20,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 21:18:20,197 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-23 21:18:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 21:18:20,198 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:20,198 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-23 21:18:20,198 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:20,199 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:20,199 INFO L82 PathProgramCache]: Analyzing trace with hash -124817652, now seen corresponding path program 7 times [2018-09-23 21:18:20,199 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:20,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:20,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:20,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:20,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:20,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:20,532 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) [2018-09-23 21:18:20,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:20,566 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:20,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:20,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 21:18:20,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:18:20,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:18:20,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:18:20,627 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-09-23 21:18:20,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:20,708 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-23 21:18:20,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:18:20,709 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-09-23 21:18:20,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:20,710 INFO L225 Difference]: With dead ends: 14 [2018-09-23 21:18:20,710 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 21:18:20,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:18:20,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 21:18:20,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-23 21:18:20,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 21:18:20,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-23 21:18:20,715 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-23 21:18:20,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:20,715 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-23 21:18:20,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:18:20,716 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-23 21:18:20,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 21:18:20,716 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:20,716 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-23 21:18:20,716 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:20,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:20,717 INFO L82 PathProgramCache]: Analyzing trace with hash 425621891, now seen corresponding path program 8 times [2018-09-23 21:18:20,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:20,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:20,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:20,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:20,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:20,852 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:20,852 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:20,860 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:18:20,884 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:18:20,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:20,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:20,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:20,916 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 21:18:20,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 21:18:20,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 21:18:20,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:18:20,917 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-09-23 21:18:20,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:20,962 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-23 21:18:20,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:18:20,964 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-09-23 21:18:20,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:20,964 INFO L225 Difference]: With dead ends: 15 [2018-09-23 21:18:20,964 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 21:18:20,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:18:20,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 21:18:20,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 21:18:20,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 21:18:20,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-23 21:18:20,969 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-23 21:18:20,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:20,969 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-23 21:18:20,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 21:18:20,970 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-23 21:18:20,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 21:18:20,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:20,970 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-23 21:18:20,971 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:20,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:20,971 INFO L82 PathProgramCache]: Analyzing trace with hash 309378540, now seen corresponding path program 9 times [2018-09-23 21:18:20,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:20,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:20,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:20,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:20,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:21,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:21,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:21,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:18:21,282 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 21:18:21,282 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:21,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:21,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:21,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 21:18:21,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:18:21,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:18:21,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:18:21,319 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-09-23 21:18:21,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:21,350 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-23 21:18:21,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:18:21,350 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-09-23 21:18:21,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:21,351 INFO L225 Difference]: With dead ends: 16 [2018-09-23 21:18:21,352 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 21:18:21,352 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:18:21,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 21:18:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-23 21:18:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 21:18:21,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-23 21:18:21,356 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-23 21:18:21,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:21,357 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-23 21:18:21,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:18:21,357 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-23 21:18:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 21:18:21,357 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:21,358 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-23 21:18:21,358 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:21,358 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:21,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1000801955, now seen corresponding path program 10 times [2018-09-23 21:18:21,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:21,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:21,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:21,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:21,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:21,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:21,546 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:21,547 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:21,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:21,557 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:18:21,597 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:18:21,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:21,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:21,608 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:21,631 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:21,632 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 21:18:21,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:18:21,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:18:21,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:18:21,633 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-09-23 21:18:21,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:21,731 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-23 21:18:21,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:18:21,731 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-23 21:18:21,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:21,732 INFO L225 Difference]: With dead ends: 17 [2018-09-23 21:18:21,732 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 21:18:21,732 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:18:21,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 21:18:21,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 21:18:21,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 21:18:21,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-23 21:18:21,735 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-23 21:18:21,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:21,736 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-23 21:18:21,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:18:21,736 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-23 21:18:21,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 21:18:21,736 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:21,737 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-23 21:18:21,737 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:21,737 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:21,737 INFO L82 PathProgramCache]: Analyzing trace with hash 960091340, now seen corresponding path program 11 times [2018-09-23 21:18:21,737 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:21,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:21,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:21,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:21,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:21,908 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:21,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:21,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:21,922 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:18:21,947 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 21:18:21,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:21,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:21,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:21,992 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 21:18:21,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:18:21,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:18:21,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:18:21,993 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-09-23 21:18:22,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:22,071 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-23 21:18:22,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:18:22,071 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-09-23 21:18:22,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:22,072 INFO L225 Difference]: With dead ends: 18 [2018-09-23 21:18:22,072 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 21:18:22,073 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 [2018-09-23 21:18:22,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 21:18:22,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 21:18:22,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 21:18:22,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-23 21:18:22,077 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-23 21:18:22,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:22,078 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-23 21:18:22,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:18:22,078 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-23 21:18:22,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 21:18:22,078 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:22,078 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-23 21:18:22,079 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:22,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:22,079 INFO L82 PathProgramCache]: Analyzing trace with hash -301937725, now seen corresponding path program 12 times [2018-09-23 21:18:22,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:22,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:22,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:22,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:22,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:22,253 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:22,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:22,262 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:18:22,290 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 21:18:22,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:22,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:22,303 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:22,332 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:22,333 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 21:18:22,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:18:22,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:18:22,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:18:22,334 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-09-23 21:18:22,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:22,376 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-23 21:18:22,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 21:18:22,377 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-23 21:18:22,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:22,378 INFO L225 Difference]: With dead ends: 19 [2018-09-23 21:18:22,378 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 21:18:22,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:18:22,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 21:18:22,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 21:18:22,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 21:18:22,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-23 21:18:22,382 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-23 21:18:22,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:22,382 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-23 21:18:22,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:18:22,382 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-23 21:18:22,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 21:18:22,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:22,383 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-23 21:18:22,383 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:22,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:22,384 INFO L82 PathProgramCache]: Analyzing trace with hash -770133076, now seen corresponding path program 13 times [2018-09-23 21:18:22,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:22,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:22,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:22,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:22,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:22,627 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:22,627 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:22,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:22,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:22,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:22,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 21:18:22,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:18:22,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:18:22,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:18:22,687 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-09-23 21:18:22,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:22,984 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-23 21:18:22,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:18:22,985 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-09-23 21:18:22,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:22,986 INFO L225 Difference]: With dead ends: 20 [2018-09-23 21:18:22,986 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 21:18:22,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:18:22,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 21:18:22,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-23 21:18:22,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 21:18:22,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-23 21:18:22,990 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-23 21:18:22,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:22,990 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-23 21:18:22,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:18:22,991 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-23 21:18:22,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 21:18:22,991 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:22,991 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-23 21:18:22,992 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:22,992 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:22,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1895680227, now seen corresponding path program 14 times [2018-09-23 21:18:22,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:22,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:22,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:22,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:22,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:23,262 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:23,262 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:23,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:23,271 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:18:23,314 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:18:23,315 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:23,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:23,364 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:23,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 21:18:23,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 21:18:23,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 21:18:23,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:18:23,365 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-09-23 21:18:23,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:23,783 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-23 21:18:23,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:18:23,783 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-09-23 21:18:23,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:23,784 INFO L225 Difference]: With dead ends: 21 [2018-09-23 21:18:23,784 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 21:18:23,785 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 [2018-09-23 21:18:23,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 21:18:23,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 21:18:23,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 21:18:23,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-23 21:18:23,794 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-23 21:18:23,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:23,794 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-23 21:18:23,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 21:18:23,796 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-23 21:18:23,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:18:23,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:23,797 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-23 21:18:23,797 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:23,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:23,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1363453300, now seen corresponding path program 15 times [2018-09-23 21:18:23,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:23,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:23,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:23,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:23,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:24,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:24,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:24,071 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:18:24,094 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 21:18:24,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:24,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:24,106 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:24,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:24,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 21:18:24,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:18:24,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:18:24,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:18:24,128 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-09-23 21:18:24,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:24,178 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-23 21:18:24,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:18:24,178 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-09-23 21:18:24,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:24,179 INFO L225 Difference]: With dead ends: 22 [2018-09-23 21:18:24,180 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 21:18:24,181 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:18:24,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 21:18:24,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-23 21:18:24,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 21:18:24,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-23 21:18:24,185 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-23 21:18:24,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:24,185 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-23 21:18:24,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:18:24,185 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-23 21:18:24,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 21:18:24,186 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:24,186 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-23 21:18:24,186 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:24,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:24,187 INFO L82 PathProgramCache]: Analyzing trace with hash 682622467, now seen corresponding path program 16 times [2018-09-23 21:18:24,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:24,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:24,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:24,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:24,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:24,810 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:24,810 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:24,817 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:18:24,833 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:18:24,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:24,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:24,878 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:24,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 21:18:24,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 21:18:24,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 21:18:24,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:18:24,879 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-09-23 21:18:24,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:24,955 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-23 21:18:24,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 21:18:24,956 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-09-23 21:18:24,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:24,956 INFO L225 Difference]: With dead ends: 23 [2018-09-23 21:18:24,956 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 21:18:24,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:18:24,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 21:18:24,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 21:18:24,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 21:18:24,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-23 21:18:24,960 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-23 21:18:24,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:24,961 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-23 21:18:24,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 21:18:24,961 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-23 21:18:24,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 21:18:24,962 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:24,962 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-23 21:18:24,962 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:24,962 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:24,962 INFO L82 PathProgramCache]: Analyzing trace with hash -313538196, now seen corresponding path program 17 times [2018-09-23 21:18:24,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:24,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:24,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:24,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:24,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:25,291 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:25,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:25,300 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:18:25,412 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-23 21:18:25,413 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:25,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:25,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:25,456 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 21:18:25,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:18:25,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:18:25,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:18:25,458 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-09-23 21:18:25,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:25,549 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-23 21:18:25,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:18:25,550 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-09-23 21:18:25,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:25,550 INFO L225 Difference]: With dead ends: 24 [2018-09-23 21:18:25,550 INFO L226 Difference]: Without dead ends: 22 [2018-09-23 21:18:25,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:18:25,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-23 21:18:25,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-23 21:18:25,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 21:18:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-23 21:18:25,555 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-23 21:18:25,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:25,555 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-23 21:18:25,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:18:25,555 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-23 21:18:25,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 21:18:25,556 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:25,556 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-23 21:18:25,556 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:25,556 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:25,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1129747677, now seen corresponding path program 18 times [2018-09-23 21:18:25,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:25,557 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:25,557 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:25,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:25,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:25,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:25,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:26,007 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:18:26,051 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-23 21:18:26,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:26,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:26,090 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:26,090 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 21:18:26,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:18:26,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:18:26,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:18:26,091 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-09-23 21:18:26,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:26,157 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-23 21:18:26,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:18:26,157 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-09-23 21:18:26,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:26,158 INFO L225 Difference]: With dead ends: 25 [2018-09-23 21:18:26,158 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 21:18:26,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:18:26,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 21:18:26,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 21:18:26,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 21:18:26,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-23 21:18:26,163 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-23 21:18:26,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:26,164 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-23 21:18:26,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 21:18:26,164 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-23 21:18:26,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 21:18:26,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:26,165 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-23 21:18:26,165 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:26,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:26,166 INFO L82 PathProgramCache]: Analyzing trace with hash -662437812, now seen corresponding path program 19 times [2018-09-23 21:18:26,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:26,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:26,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:26,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:26,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:26,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:26,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:26,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:26,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:26,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:26,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 21:18:26,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:18:26,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:18:26,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:18:26,526 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-09-23 21:18:26,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:26,613 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-23 21:18:26,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 21:18:26,614 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-09-23 21:18:26,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:26,615 INFO L225 Difference]: With dead ends: 26 [2018-09-23 21:18:26,615 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 21:18:26,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:18:26,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 21:18:26,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-23 21:18:26,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 21:18:26,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-23 21:18:26,619 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-23 21:18:26,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:26,619 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-23 21:18:26,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:18:26,619 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-23 21:18:26,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 21:18:26,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:26,620 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-23 21:18:26,620 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:26,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:26,621 INFO L82 PathProgramCache]: Analyzing trace with hash 939266115, now seen corresponding path program 20 times [2018-09-23 21:18:26,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:26,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:26,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:26,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:26,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:26,909 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:26,909 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:26,917 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:18:26,951 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:18:26,952 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:26,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:26,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:26,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 21:18:26,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 21:18:26,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 21:18:26,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:18:26,995 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-09-23 21:18:27,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:27,155 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-23 21:18:27,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:18:27,156 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-09-23 21:18:27,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:27,157 INFO L225 Difference]: With dead ends: 27 [2018-09-23 21:18:27,157 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 21:18:27,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:18:27,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 21:18:27,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 21:18:27,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 21:18:27,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-23 21:18:27,161 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-23 21:18:27,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:27,161 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-23 21:18:27,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 21:18:27,161 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-23 21:18:27,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 21:18:27,162 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:27,162 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-23 21:18:27,162 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:27,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:27,162 INFO L82 PathProgramCache]: Analyzing trace with hash -947519700, now seen corresponding path program 21 times [2018-09-23 21:18:27,162 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:27,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:27,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:27,163 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:27,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:27,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:27,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:27,540 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:18:27,566 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 21:18:27,566 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:27,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:27,608 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:27,608 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 21:18:27,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:18:27,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:18:27,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:18:27,609 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-09-23 21:18:27,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:27,662 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-23 21:18:27,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:18:27,663 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-09-23 21:18:27,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:27,663 INFO L225 Difference]: With dead ends: 28 [2018-09-23 21:18:27,663 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 21:18:27,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:18:27,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 21:18:27,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-23 21:18:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 21:18:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-23 21:18:27,667 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-23 21:18:27,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:27,668 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-23 21:18:27,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:18:27,668 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-23 21:18:27,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 21:18:27,669 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:27,669 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-23 21:18:27,669 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:27,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:27,669 INFO L82 PathProgramCache]: Analyzing trace with hash 691662179, now seen corresponding path program 22 times [2018-09-23 21:18:27,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:27,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:27,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:27,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:27,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:28,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:28,023 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:28,030 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:18:28,051 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:18:28,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:28,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:28,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:28,087 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 21:18:28,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 21:18:28,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 21:18:28,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:18:28,088 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-09-23 21:18:28,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:28,142 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-23 21:18:28,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:18:28,142 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-09-23 21:18:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:28,143 INFO L225 Difference]: With dead ends: 29 [2018-09-23 21:18:28,143 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 21:18:28,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:18:28,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 21:18:28,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 21:18:28,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 21:18:28,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-23 21:18:28,148 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-23 21:18:28,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:28,148 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-23 21:18:28,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 21:18:28,149 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-23 21:18:28,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 21:18:28,149 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:28,149 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-23 21:18:28,150 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:28,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:28,151 INFO L82 PathProgramCache]: Analyzing trace with hash -33307124, now seen corresponding path program 23 times [2018-09-23 21:18:28,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:28,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:28,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:28,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:28,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:28,682 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:28,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:28,694 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:18:28,729 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 21:18:28,729 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:28,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:28,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:28,773 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 21:18:28,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:18:28,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:18:28,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:18:28,784 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-09-23 21:18:28,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:28,885 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-23 21:18:28,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:18:28,886 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-09-23 21:18:28,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:28,886 INFO L225 Difference]: With dead ends: 30 [2018-09-23 21:18:28,886 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 21:18:28,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:18:28,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 21:18:28,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-23 21:18:28,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 21:18:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-23 21:18:28,892 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-23 21:18:28,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:28,892 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-23 21:18:28,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:18:28,892 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-23 21:18:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-23 21:18:28,893 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:28,893 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-23 21:18:28,893 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:28,893 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:28,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1032519037, now seen corresponding path program 24 times [2018-09-23 21:18:28,894 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:28,894 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:28,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:28,894 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:28,895 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:29,502 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:29,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:29,509 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:18:29,536 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 21:18:29,536 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:29,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:29,576 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:29,576 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 21:18:29,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 21:18:29,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 21:18:29,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:18:29,577 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-09-23 21:18:29,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:29,648 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-23 21:18:29,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:18:29,649 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-09-23 21:18:29,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:29,650 INFO L225 Difference]: With dead ends: 31 [2018-09-23 21:18:29,650 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 21:18:29,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:18:29,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 21:18:29,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 21:18:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 21:18:29,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-23 21:18:29,653 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-23 21:18:29,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:29,653 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-23 21:18:29,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 21:18:29,654 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-23 21:18:29,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 21:18:29,654 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:29,654 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-23 21:18:29,655 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:29,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:29,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1943317268, now seen corresponding path program 25 times [2018-09-23 21:18:29,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:29,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:29,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:29,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:29,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:30,756 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:30,756 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:30,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:30,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:30,822 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:30,822 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 21:18:30,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:18:30,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:18:30,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:18:30,823 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-09-23 21:18:30,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:30,906 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-23 21:18:30,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 21:18:30,906 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-09-23 21:18:30,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:30,907 INFO L225 Difference]: With dead ends: 32 [2018-09-23 21:18:30,907 INFO L226 Difference]: Without dead ends: 30 [2018-09-23 21:18:30,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:18:30,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-23 21:18:30,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-23 21:18:30,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 21:18:30,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-23 21:18:30,911 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-23 21:18:30,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:30,911 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-23 21:18:30,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:18:30,911 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-23 21:18:30,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 21:18:30,912 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:30,912 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-23 21:18:30,912 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:30,912 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:30,912 INFO L82 PathProgramCache]: Analyzing trace with hash -113291357, now seen corresponding path program 26 times [2018-09-23 21:18:30,912 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:30,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:30,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:30,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:30,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:31,520 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:31,520 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:31,527 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:18:31,553 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:18:31,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:31,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:31,564 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:31,587 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:31,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 21:18:31,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 21:18:31,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 21:18:31,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:18:31,589 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-09-23 21:18:31,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:31,750 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-23 21:18:31,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:18:31,751 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-09-23 21:18:31,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:31,751 INFO L225 Difference]: With dead ends: 33 [2018-09-23 21:18:31,752 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 21:18:31,752 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 [2018-09-23 21:18:31,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 21:18:31,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 21:18:31,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 21:18:31,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-23 21:18:31,756 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-23 21:18:31,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:31,757 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-23 21:18:31,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 21:18:31,757 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-23 21:18:31,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 21:18:31,757 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:31,757 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-23 21:18:31,758 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:31,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:31,758 INFO L82 PathProgramCache]: Analyzing trace with hash 782937036, now seen corresponding path program 27 times [2018-09-23 21:18:31,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:31,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:31,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:31,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:31,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:31,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:32,174 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:32,175 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:32,175 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:32,186 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:18:32,216 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-23 21:18:32,216 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:32,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:32,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:32,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 21:18:32,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:18:32,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:18:32,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:18:32,258 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-09-23 21:18:32,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:32,312 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-23 21:18:32,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 21:18:32,312 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-09-23 21:18:32,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:32,313 INFO L225 Difference]: With dead ends: 34 [2018-09-23 21:18:32,313 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 21:18:32,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:18:32,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 21:18:32,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-23 21:18:32,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 21:18:32,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-23 21:18:32,319 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-23 21:18:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:32,319 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-23 21:18:32,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:18:32,319 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-23 21:18:32,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-23 21:18:32,320 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:32,320 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-23 21:18:32,320 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:32,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:32,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1498753853, now seen corresponding path program 28 times [2018-09-23 21:18:32,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:32,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:32,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:32,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:32,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:32,720 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:32,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:32,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:32,735 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:18:32,759 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:18:32,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:32,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:32,798 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:32,799 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 21:18:32,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 21:18:32,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 21:18:32,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:18:32,800 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-09-23 21:18:32,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:32,850 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-23 21:18:32,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 21:18:32,851 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-09-23 21:18:32,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:32,851 INFO L225 Difference]: With dead ends: 35 [2018-09-23 21:18:32,851 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 21:18:32,852 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:18:32,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 21:18:32,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 21:18:32,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 21:18:32,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-23 21:18:32,856 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-23 21:18:32,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:32,856 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-23 21:18:32,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 21:18:32,857 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-23 21:18:32,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 21:18:32,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:32,857 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-23 21:18:32,858 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:32,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:32,858 INFO L82 PathProgramCache]: Analyzing trace with hash 783272620, now seen corresponding path program 29 times [2018-09-23 21:18:32,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:32,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:32,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:32,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:32,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:33,307 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:33,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:33,308 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:33,316 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:18:33,356 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-23 21:18:33,357 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:33,360 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:33,402 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:33,402 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 21:18:33,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:18:33,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:18:33,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:18:33,404 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-09-23 21:18:33,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:33,592 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-23 21:18:33,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:18:33,592 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-09-23 21:18:33,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:33,592 INFO L225 Difference]: With dead ends: 36 [2018-09-23 21:18:33,592 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 21:18:33,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:18:33,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 21:18:33,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-23 21:18:33,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 21:18:33,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-23 21:18:33,597 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-23 21:18:33,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:33,597 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-23 21:18:33,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:18:33,597 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-23 21:18:33,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 21:18:33,598 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:33,598 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-23 21:18:33,598 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:33,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:33,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1488350749, now seen corresponding path program 30 times [2018-09-23 21:18:33,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:33,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:33,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:33,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:33,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:34,387 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:34,388 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:34,388 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:34,396 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:18:34,480 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-23 21:18:34,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:34,483 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:34,530 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:34,530 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 21:18:34,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 21:18:34,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 21:18:34,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:18:34,531 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-09-23 21:18:34,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:34,701 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-23 21:18:34,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 21:18:34,701 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-09-23 21:18:34,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:34,702 INFO L225 Difference]: With dead ends: 37 [2018-09-23 21:18:34,702 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 21:18:34,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:18:34,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 21:18:34,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 21:18:34,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 21:18:34,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-23 21:18:34,706 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-23 21:18:34,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:34,706 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-23 21:18:34,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 21:18:34,706 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-23 21:18:34,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 21:18:34,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:34,707 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-23 21:18:34,707 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:34,707 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:34,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1105768844, now seen corresponding path program 31 times [2018-09-23 21:18:34,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:34,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:34,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:34,708 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:34,708 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:35,732 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:35,732 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:35,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:35,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:35,800 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:35,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 21:18:35,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 21:18:35,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 21:18:35,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:18:35,802 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-09-23 21:18:35,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:35,889 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-23 21:18:35,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:18:35,889 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-09-23 21:18:35,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:35,890 INFO L225 Difference]: With dead ends: 38 [2018-09-23 21:18:35,890 INFO L226 Difference]: Without dead ends: 36 [2018-09-23 21:18:35,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:18:35,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-23 21:18:35,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-23 21:18:35,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 21:18:35,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-23 21:18:35,893 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-23 21:18:35,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:35,893 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-23 21:18:35,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 21:18:35,894 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-23 21:18:35,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-23 21:18:35,894 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:35,894 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-23 21:18:35,894 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:35,894 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:35,895 INFO L82 PathProgramCache]: Analyzing trace with hash -80902397, now seen corresponding path program 32 times [2018-09-23 21:18:35,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:35,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:35,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:35,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:35,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:35,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:36,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:36,665 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:36,672 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:18:36,708 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:18:36,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:36,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:36,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:36,741 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 21:18:36,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 21:18:36,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 21:18:36,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:18:36,742 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-09-23 21:18:36,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:36,800 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-23 21:18:36,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 21:18:36,800 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-09-23 21:18:36,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:36,801 INFO L225 Difference]: With dead ends: 39 [2018-09-23 21:18:36,801 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 21:18:36,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:18:36,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 21:18:36,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 21:18:36,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 21:18:36,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-23 21:18:36,805 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-23 21:18:36,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:36,806 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-23 21:18:36,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 21:18:36,806 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-23 21:18:36,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 21:18:36,806 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:36,806 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-23 21:18:36,806 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:36,806 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:36,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1786994796, now seen corresponding path program 33 times [2018-09-23 21:18:36,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:36,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:36,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:36,807 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:36,807 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:37,542 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:37,543 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:37,543 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:37,551 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:18:37,584 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-23 21:18:37,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:37,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:37,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:37,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 21:18:37,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 21:18:37,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 21:18:37,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:18:37,629 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-09-23 21:18:37,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:37,783 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-23 21:18:37,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 21:18:37,784 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-09-23 21:18:37,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:37,785 INFO L225 Difference]: With dead ends: 40 [2018-09-23 21:18:37,785 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 21:18:37,786 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 [2018-09-23 21:18:37,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 21:18:37,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-23 21:18:37,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 21:18:37,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-23 21:18:37,788 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-23 21:18:37,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:37,789 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-23 21:18:37,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 21:18:37,789 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-23 21:18:37,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-23 21:18:37,789 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:37,789 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-23 21:18:37,789 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:37,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:37,790 INFO L82 PathProgramCache]: Analyzing trace with hash -437734365, now seen corresponding path program 34 times [2018-09-23 21:18:37,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:37,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:37,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:37,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:37,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:38,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:38,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:38,372 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:18:38,400 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:18:38,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:38,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:38,431 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:38,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 21:18:38,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 21:18:38,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 21:18:38,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:18:38,432 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-09-23 21:18:38,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:38,493 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-23 21:18:38,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 21:18:38,493 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-09-23 21:18:38,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:38,494 INFO L225 Difference]: With dead ends: 41 [2018-09-23 21:18:38,494 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 21:18:38,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:18:38,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 21:18:38,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 21:18:38,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 21:18:38,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-23 21:18:38,497 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-23 21:18:38,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:38,498 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-23 21:18:38,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 21:18:38,498 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-23 21:18:38,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 21:18:38,499 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:38,499 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-23 21:18:38,499 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:38,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:38,499 INFO L82 PathProgramCache]: Analyzing trace with hash -684861620, now seen corresponding path program 35 times [2018-09-23 21:18:38,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:38,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:38,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:38,500 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:38,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:39,109 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:39,109 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:39,116 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:18:39,157 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 21:18:39,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:39,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:39,193 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:39,193 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 21:18:39,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:18:39,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:18:39,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:18:39,194 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-09-23 21:18:39,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:39,281 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-23 21:18:39,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 21:18:39,282 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-09-23 21:18:39,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:39,282 INFO L225 Difference]: With dead ends: 42 [2018-09-23 21:18:39,282 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 21:18:39,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:18:39,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 21:18:39,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 21:18:39,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 21:18:39,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-23 21:18:39,285 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-23 21:18:39,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:39,286 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-23 21:18:39,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:18:39,286 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-23 21:18:39,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-23 21:18:39,286 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:39,286 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-23 21:18:39,287 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:39,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:39,287 INFO L82 PathProgramCache]: Analyzing trace with hash 244128067, now seen corresponding path program 36 times [2018-09-23 21:18:39,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:39,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:39,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:39,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:39,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:40,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:40,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:40,162 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:18:40,213 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 21:18:40,214 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:40,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:40,226 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:40,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:40,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 21:18:40,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 21:18:40,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 21:18:40,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:18:40,258 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-09-23 21:18:40,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:40,913 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-23 21:18:40,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 21:18:40,913 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-09-23 21:18:40,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:40,914 INFO L225 Difference]: With dead ends: 43 [2018-09-23 21:18:40,914 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 21:18:40,915 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:18:40,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 21:18:40,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 21:18:40,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 21:18:40,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-23 21:18:40,918 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-23 21:18:40,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:40,918 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-23 21:18:40,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 21:18:40,918 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-23 21:18:40,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 21:18:40,918 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:40,919 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-23 21:18:40,919 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:40,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:40,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1021962708, now seen corresponding path program 37 times [2018-09-23 21:18:40,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:40,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:40,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:40,920 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:40,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:40,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:41,694 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:41,694 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:41,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:41,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:41,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:41,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 21:18:41,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 21:18:41,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 21:18:41,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:18:41,759 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-09-23 21:18:41,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:41,822 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-23 21:18:41,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 21:18:41,822 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-09-23 21:18:41,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:41,823 INFO L225 Difference]: With dead ends: 44 [2018-09-23 21:18:41,823 INFO L226 Difference]: Without dead ends: 42 [2018-09-23 21:18:41,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:18:41,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-23 21:18:41,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-23 21:18:41,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-23 21:18:41,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-23 21:18:41,827 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-23 21:18:41,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:41,827 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-23 21:18:41,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 21:18:41,828 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-23 21:18:41,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-23 21:18:41,828 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:41,828 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-23 21:18:41,828 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:41,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:41,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1616071069, now seen corresponding path program 38 times [2018-09-23 21:18:41,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:41,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:41,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:41,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:41,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:42,555 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:42,555 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:42,562 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:18:42,594 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:18:42,594 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:42,596 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:42,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:42,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 21:18:42,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 21:18:42,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 21:18:42,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:18:42,640 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-09-23 21:18:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:42,853 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-23 21:18:42,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 21:18:42,854 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-09-23 21:18:42,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:42,855 INFO L225 Difference]: With dead ends: 45 [2018-09-23 21:18:42,855 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 21:18:42,856 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:18:42,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 21:18:42,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 21:18:42,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 21:18:42,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-23 21:18:42,859 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-23 21:18:42,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:42,859 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-23 21:18:42,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 21:18:42,860 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-23 21:18:42,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 21:18:42,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:42,860 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-23 21:18:42,860 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:42,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:42,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1441406220, now seen corresponding path program 39 times [2018-09-23 21:18:42,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:42,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:42,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:42,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:42,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:43,497 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:43,498 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:43,498 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:43,505 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:18:43,545 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-23 21:18:43,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:43,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:43,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:43,580 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 21:18:43,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 21:18:43,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 21:18:43,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:18:43,581 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-09-23 21:18:43,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:43,666 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-23 21:18:43,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 21:18:43,667 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-09-23 21:18:43,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:43,667 INFO L225 Difference]: With dead ends: 46 [2018-09-23 21:18:43,668 INFO L226 Difference]: Without dead ends: 44 [2018-09-23 21:18:43,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:18:43,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-23 21:18:43,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-23 21:18:43,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 21:18:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-23 21:18:43,671 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-23 21:18:43,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:43,671 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-23 21:18:43,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 21:18:43,672 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-23 21:18:43,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 21:18:43,672 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:43,672 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-23 21:18:43,672 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:43,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:43,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1733921667, now seen corresponding path program 40 times [2018-09-23 21:18:43,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:43,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:43,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:43,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:43,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:44,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:44,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:44,512 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:18:44,557 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:18:44,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:44,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:44,601 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:44,601 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 21:18:44,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 21:18:44,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 21:18:44,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:18:44,602 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-09-23 21:18:44,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:44,739 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-23 21:18:44,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 21:18:44,740 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-09-23 21:18:44,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:44,740 INFO L225 Difference]: With dead ends: 47 [2018-09-23 21:18:44,740 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 21:18:44,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:18:44,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 21:18:44,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 21:18:44,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 21:18:44,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-23 21:18:44,745 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-23 21:18:44,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:44,745 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-23 21:18:44,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 21:18:44,745 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-23 21:18:44,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 21:18:44,746 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:44,746 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-23 21:18:44,746 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:44,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:44,746 INFO L82 PathProgramCache]: Analyzing trace with hash -2083001364, now seen corresponding path program 41 times [2018-09-23 21:18:44,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:44,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:44,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:44,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:44,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:45,551 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:45,552 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:45,560 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:18:45,608 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-23 21:18:45,608 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:45,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:45,640 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:45,640 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 21:18:45,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 21:18:45,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 21:18:45,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:18:45,641 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-09-23 21:18:45,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:45,699 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-23 21:18:45,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 21:18:45,700 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-09-23 21:18:45,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:45,700 INFO L225 Difference]: With dead ends: 48 [2018-09-23 21:18:45,700 INFO L226 Difference]: Without dead ends: 46 [2018-09-23 21:18:45,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:18:45,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-23 21:18:45,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-23 21:18:45,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 21:18:45,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-23 21:18:45,704 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-23 21:18:45,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:45,704 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-23 21:18:45,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 21:18:45,704 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-23 21:18:45,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-23 21:18:45,704 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:45,704 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-23 21:18:45,705 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:45,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:45,705 INFO L82 PathProgramCache]: Analyzing trace with hash -148531037, now seen corresponding path program 42 times [2018-09-23 21:18:45,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:45,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:45,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:45,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:45,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:47,321 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:47,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:47,329 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:18:47,371 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-23 21:18:47,372 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:47,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:47,385 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:47,405 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:47,405 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 21:18:47,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 21:18:47,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 21:18:47,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:18:47,406 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-09-23 21:18:47,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:47,478 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-23 21:18:47,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 21:18:47,479 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-09-23 21:18:47,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:47,479 INFO L225 Difference]: With dead ends: 49 [2018-09-23 21:18:47,480 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 21:18:47,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:18:47,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 21:18:47,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 21:18:47,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 21:18:47,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-23 21:18:47,482 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-23 21:18:47,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:47,483 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-23 21:18:47,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 21:18:47,483 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-23 21:18:47,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 21:18:47,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:47,484 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-23 21:18:47,484 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:47,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:47,484 INFO L82 PathProgramCache]: Analyzing trace with hash -309493044, now seen corresponding path program 43 times [2018-09-23 21:18:47,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:47,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:47,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:47,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:47,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:48,730 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:48,730 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:48,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:48,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:48,807 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:48,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 21:18:48,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 21:18:48,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 21:18:48,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:18:48,808 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-09-23 21:18:48,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:48,930 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-23 21:18:48,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 21:18:48,931 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-09-23 21:18:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:48,932 INFO L225 Difference]: With dead ends: 50 [2018-09-23 21:18:48,932 INFO L226 Difference]: Without dead ends: 48 [2018-09-23 21:18:48,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:18:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-23 21:18:48,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-23 21:18:48,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-23 21:18:48,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-23 21:18:48,935 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-23 21:18:48,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:48,935 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-23 21:18:48,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 21:18:48,935 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-23 21:18:48,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-23 21:18:48,936 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:48,936 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-23 21:18:48,936 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:48,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:48,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1004347965, now seen corresponding path program 44 times [2018-09-23 21:18:48,936 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:48,937 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:48,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:48,937 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:48,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:49,870 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:49,870 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:49,892 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:18:49,929 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:18:49,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:49,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:49,963 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:49,963 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 21:18:49,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 21:18:49,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 21:18:49,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:18:49,964 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-09-23 21:18:50,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:50,024 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-23 21:18:50,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 21:18:50,025 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-09-23 21:18:50,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:50,026 INFO L225 Difference]: With dead ends: 51 [2018-09-23 21:18:50,026 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 21:18:50,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:18:50,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 21:18:50,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 21:18:50,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 21:18:50,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-23 21:18:50,030 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-23 21:18:50,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:50,030 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-23 21:18:50,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 21:18:50,030 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-23 21:18:50,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 21:18:50,031 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:50,031 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-23 21:18:50,031 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:50,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:50,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1070014036, now seen corresponding path program 45 times [2018-09-23 21:18:50,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:50,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:50,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:50,032 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:50,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:50,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:50,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:50,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:50,943 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:18:50,990 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-23 21:18:50,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:50,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:51,033 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:51,034 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 21:18:51,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 21:18:51,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 21:18:51,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:18:51,035 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-09-23 21:18:51,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:51,572 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-23 21:18:51,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:18:51,572 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-09-23 21:18:51,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:51,573 INFO L225 Difference]: With dead ends: 52 [2018-09-23 21:18:51,573 INFO L226 Difference]: Without dead ends: 50 [2018-09-23 21:18:51,573 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 [2018-09-23 21:18:51,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-23 21:18:51,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-23 21:18:51,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 21:18:51,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-23 21:18:51,576 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-23 21:18:51,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:51,576 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-23 21:18:51,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 21:18:51,576 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-23 21:18:51,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-23 21:18:51,577 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:51,577 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-23 21:18:51,577 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:51,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:51,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1189305059, now seen corresponding path program 46 times [2018-09-23 21:18:51,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:51,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:51,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:51,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:51,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:52,571 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:52,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:52,578 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:18:52,615 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:18:52,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:52,617 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:52,650 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:52,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 21:18:52,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 21:18:52,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 21:18:52,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:18:52,651 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-09-23 21:18:52,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:52,716 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-23 21:18:52,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 21:18:52,716 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-09-23 21:18:52,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:52,717 INFO L225 Difference]: With dead ends: 53 [2018-09-23 21:18:52,717 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 21:18:52,718 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:18:52,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 21:18:52,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 21:18:52,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 21:18:52,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-23 21:18:52,720 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-23 21:18:52,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:52,721 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-23 21:18:52,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 21:18:52,721 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-23 21:18:52,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 21:18:52,721 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:52,721 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-23 21:18:52,722 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:52,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:52,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1786247028, now seen corresponding path program 47 times [2018-09-23 21:18:52,722 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:52,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:52,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:52,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:52,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:53,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:53,734 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:53,734 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:53,740 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:18:53,787 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 21:18:53,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:53,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:53,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:53,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 21:18:53,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 21:18:53,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 21:18:53,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:18:53,835 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-09-23 21:18:53,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:53,956 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-23 21:18:53,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 21:18:53,956 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-09-23 21:18:53,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:53,957 INFO L225 Difference]: With dead ends: 54 [2018-09-23 21:18:53,957 INFO L226 Difference]: Without dead ends: 52 [2018-09-23 21:18:53,957 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:18:53,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-23 21:18:53,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-23 21:18:53,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-23 21:18:53,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-23 21:18:53,960 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-23 21:18:53,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:53,960 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-23 21:18:53,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 21:18:53,961 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-23 21:18:53,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-23 21:18:53,963 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:53,963 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-23 21:18:53,963 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:53,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:53,964 INFO L82 PathProgramCache]: Analyzing trace with hash 460918787, now seen corresponding path program 48 times [2018-09-23 21:18:53,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:53,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:53,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:53,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:53,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:55,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:55,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:55,169 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:18:55,219 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 21:18:55,219 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:55,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:55,255 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:55,255 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 21:18:55,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 21:18:55,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 21:18:55,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:18:55,256 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-09-23 21:18:55,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:55,346 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-23 21:18:55,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 21:18:55,346 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-09-23 21:18:55,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:55,347 INFO L225 Difference]: With dead ends: 55 [2018-09-23 21:18:55,347 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 21:18:55,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:18:55,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 21:18:55,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 21:18:55,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 21:18:55,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-23 21:18:55,351 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-23 21:18:55,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:55,351 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-23 21:18:55,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 21:18:55,352 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-23 21:18:55,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 21:18:55,352 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:55,352 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-23 21:18:55,352 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:55,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:55,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1403582316, now seen corresponding path program 49 times [2018-09-23 21:18:55,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:55,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:55,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:55,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:55,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:56,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:56,532 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:56,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:56,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:56,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:56,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:56,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 21:18:56,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 21:18:56,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 21:18:56,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:18:56,616 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-09-23 21:18:56,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:56,751 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-23 21:18:56,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 21:18:56,752 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-09-23 21:18:56,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:56,752 INFO L225 Difference]: With dead ends: 56 [2018-09-23 21:18:56,752 INFO L226 Difference]: Without dead ends: 54 [2018-09-23 21:18:56,753 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:18:56,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-23 21:18:56,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-23 21:18:56,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 21:18:56,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-23 21:18:56,755 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-23 21:18:56,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:56,756 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-23 21:18:56,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 21:18:56,756 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-23 21:18:56,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 21:18:56,756 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:56,757 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-23 21:18:56,757 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:56,757 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:56,757 INFO L82 PathProgramCache]: Analyzing trace with hash 561380643, now seen corresponding path program 50 times [2018-09-23 21:18:56,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:56,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:56,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:56,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:18:56,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:57,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:57,829 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:57,837 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:18:57,895 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:18:57,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:57,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:57,942 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:57,942 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 21:18:57,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 21:18:57,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 21:18:57,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:18:57,944 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-09-23 21:18:58,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:58,084 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-23 21:18:58,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 21:18:58,084 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-09-23 21:18:58,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:58,085 INFO L225 Difference]: With dead ends: 57 [2018-09-23 21:18:58,085 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 21:18:58,086 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:18:58,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 21:18:58,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 21:18:58,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 21:18:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-23 21:18:58,088 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-23 21:18:58,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:58,088 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-23 21:18:58,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 21:18:58,088 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-23 21:18:58,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 21:18:58,088 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:58,089 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-23 21:18:58,089 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:58,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:58,089 INFO L82 PathProgramCache]: Analyzing trace with hash 222932556, now seen corresponding path program 51 times [2018-09-23 21:18:58,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:58,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:58,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:58,090 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:58,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:18:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:59,123 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:18:59,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:18:59,130 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:18:59,182 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-23 21:18:59,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:18:59,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:18:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:18:59,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:18:59,224 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 21:18:59,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 21:18:59,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 21:18:59,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:18:59,226 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-09-23 21:18:59,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:18:59,342 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-23 21:18:59,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 21:18:59,343 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-09-23 21:18:59,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:18:59,344 INFO L225 Difference]: With dead ends: 58 [2018-09-23 21:18:59,344 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 21:18:59,344 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 [2018-09-23 21:18:59,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 21:18:59,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-23 21:18:59,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 21:18:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-23 21:18:59,347 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-23 21:18:59,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:18:59,347 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-23 21:18:59,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 21:18:59,347 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-23 21:18:59,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-23 21:18:59,348 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:18:59,348 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-23 21:18:59,348 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:18:59,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:18:59,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1679023549, now seen corresponding path program 52 times [2018-09-23 21:18:59,348 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:18:59,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:18:59,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:59,349 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:18:59,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:18:59,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:00,552 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:00,552 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:00,560 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:19:00,603 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:19:00,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:00,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:00,653 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:00,654 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 21:19:00,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 21:19:00,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 21:19:00,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:19:00,655 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-09-23 21:19:00,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:00,918 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-23 21:19:00,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 21:19:00,918 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-09-23 21:19:00,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:00,919 INFO L225 Difference]: With dead ends: 59 [2018-09-23 21:19:00,919 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 21:19:00,921 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:19:00,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 21:19:00,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 21:19:00,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 21:19:00,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-23 21:19:00,923 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-23 21:19:00,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:00,923 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-23 21:19:00,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 21:19:00,924 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-23 21:19:00,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 21:19:00,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:00,924 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-23 21:19:00,924 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:00,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:00,925 INFO L82 PathProgramCache]: Analyzing trace with hash -510120660, now seen corresponding path program 53 times [2018-09-23 21:19:00,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:00,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:00,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:00,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:00,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:02,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:02,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:02,319 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:19:02,376 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-23 21:19:02,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:02,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:02,421 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:02,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 21:19:02,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 21:19:02,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 21:19:02,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:19:02,422 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-09-23 21:19:02,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:02,544 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-23 21:19:02,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 21:19:02,545 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-09-23 21:19:02,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:02,546 INFO L225 Difference]: With dead ends: 60 [2018-09-23 21:19:02,546 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 21:19:02,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:19:02,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 21:19:02,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-23 21:19:02,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-23 21:19:02,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-23 21:19:02,549 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-23 21:19:02,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:02,549 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-23 21:19:02,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 21:19:02,549 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-23 21:19:02,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-23 21:19:02,549 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:02,550 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-23 21:19:02,550 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:02,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:02,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1366130531, now seen corresponding path program 54 times [2018-09-23 21:19:02,550 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:02,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:02,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:02,551 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:02,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:03,756 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:03,756 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:03,763 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:19:03,815 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-23 21:19:03,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:03,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:03,851 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:03,851 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 21:19:03,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 21:19:03,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 21:19:03,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:19:03,853 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-09-23 21:19:03,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:03,989 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-23 21:19:03,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 21:19:03,990 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-09-23 21:19:03,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:03,990 INFO L225 Difference]: With dead ends: 61 [2018-09-23 21:19:03,990 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 21:19:03,991 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 [2018-09-23 21:19:03,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 21:19:03,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 21:19:03,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 21:19:03,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-23 21:19:03,992 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-23 21:19:03,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:03,993 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-23 21:19:03,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 21:19:03,993 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-23 21:19:03,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 21:19:03,993 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:03,993 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-23 21:19:03,993 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:03,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:03,994 INFO L82 PathProgramCache]: Analyzing trace with hash -599624692, now seen corresponding path program 55 times [2018-09-23 21:19:03,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:03,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:03,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:03,994 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:03,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:05,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:05,377 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:05,377 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:05,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:05,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:05,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:05,479 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:05,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 21:19:05,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 21:19:05,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 21:19:05,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:19:05,480 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-09-23 21:19:05,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:05,645 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-23 21:19:05,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 21:19:05,646 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-09-23 21:19:05,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:05,647 INFO L225 Difference]: With dead ends: 62 [2018-09-23 21:19:05,647 INFO L226 Difference]: Without dead ends: 60 [2018-09-23 21:19:05,648 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 [2018-09-23 21:19:05,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-23 21:19:05,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-23 21:19:05,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-23 21:19:05,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-23 21:19:05,651 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-23 21:19:05,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:05,651 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-23 21:19:05,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 21:19:05,651 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-23 21:19:05,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-23 21:19:05,652 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:05,652 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-23 21:19:05,652 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:05,652 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:05,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1408494461, now seen corresponding path program 56 times [2018-09-23 21:19:05,652 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:05,652 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:05,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:05,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:05,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:07,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:07,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:07,021 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:19:07,065 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:19:07,066 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:07,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:07,098 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:07,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 21:19:07,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 21:19:07,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 21:19:07,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:19:07,099 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-09-23 21:19:07,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:07,198 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-23 21:19:07,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 21:19:07,198 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-09-23 21:19:07,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:07,199 INFO L225 Difference]: With dead ends: 63 [2018-09-23 21:19:07,199 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 21:19:07,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:19:07,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 21:19:07,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 21:19:07,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 21:19:07,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-23 21:19:07,202 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-23 21:19:07,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:07,203 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-23 21:19:07,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 21:19:07,203 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-23 21:19:07,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 21:19:07,203 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:07,204 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-23 21:19:07,204 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:07,204 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:07,204 INFO L82 PathProgramCache]: Analyzing trace with hash -713653524, now seen corresponding path program 57 times [2018-09-23 21:19:07,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:07,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:07,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:07,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:07,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:08,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:08,428 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:08,428 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:08,435 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:19:08,491 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-23 21:19:08,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:08,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:08,536 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:08,537 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-23 21:19:08,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 21:19:08,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 21:19:08,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:19:08,538 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-09-23 21:19:08,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:08,654 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-23 21:19:08,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 21:19:08,654 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-09-23 21:19:08,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:08,655 INFO L225 Difference]: With dead ends: 64 [2018-09-23 21:19:08,655 INFO L226 Difference]: Without dead ends: 62 [2018-09-23 21:19:08,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:19:08,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-23 21:19:08,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-23 21:19:08,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-23 21:19:08,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-23 21:19:08,659 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-23 21:19:08,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:08,659 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-23 21:19:08,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 21:19:08,659 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-23 21:19:08,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-23 21:19:08,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:08,660 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-23 21:19:08,660 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:08,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:08,660 INFO L82 PathProgramCache]: Analyzing trace with hash -648420957, now seen corresponding path program 58 times [2018-09-23 21:19:08,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:08,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:08,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:08,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:08,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:10,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:10,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:10,329 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:19:10,375 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:19:10,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:10,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:10,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:10,413 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-23 21:19:10,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 21:19:10,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 21:19:10,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:19:10,414 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-09-23 21:19:10,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:10,518 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-23 21:19:10,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 21:19:10,518 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-09-23 21:19:10,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:10,519 INFO L225 Difference]: With dead ends: 65 [2018-09-23 21:19:10,519 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 21:19:10,520 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:19:10,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 21:19:10,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 21:19:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 21:19:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-23 21:19:10,523 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-23 21:19:10,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:10,523 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-23 21:19:10,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 21:19:10,523 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-23 21:19:10,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 21:19:10,524 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:10,524 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-23 21:19:10,524 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:10,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:10,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1373788620, now seen corresponding path program 59 times [2018-09-23 21:19:10,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:10,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:10,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:10,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:10,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:12,239 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:12,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:12,247 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:19:12,310 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-23 21:19:12,310 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:12,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:12,357 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:12,358 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 21:19:12,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 21:19:12,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 21:19:12,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:19:12,359 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-09-23 21:19:12,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:12,548 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-23 21:19:12,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 21:19:12,549 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-09-23 21:19:12,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:12,550 INFO L225 Difference]: With dead ends: 66 [2018-09-23 21:19:12,550 INFO L226 Difference]: Without dead ends: 64 [2018-09-23 21:19:12,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:19:12,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-23 21:19:12,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-23 21:19:12,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 21:19:12,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-23 21:19:12,553 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-23 21:19:12,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:12,553 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-23 21:19:12,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 21:19:12,553 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-23 21:19:12,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-23 21:19:12,553 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:12,554 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-23 21:19:12,554 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:12,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:12,554 INFO L82 PathProgramCache]: Analyzing trace with hash -362223933, now seen corresponding path program 60 times [2018-09-23 21:19:12,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:12,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:12,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:12,555 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:12,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:14,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:14,023 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:14,031 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:19:14,089 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 21:19:14,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:14,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:14,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:14,149 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-23 21:19:14,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 21:19:14,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 21:19:14,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 21:19:14,150 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-09-23 21:19:14,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:14,260 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-23 21:19:14,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 21:19:14,261 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-09-23 21:19:14,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:14,261 INFO L225 Difference]: With dead ends: 67 [2018-09-23 21:19:14,262 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 21:19:14,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 21:19:14,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 21:19:14,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 21:19:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 21:19:14,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-23 21:19:14,265 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-23 21:19:14,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:14,265 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-23 21:19:14,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 21:19:14,265 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-23 21:19:14,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 21:19:14,265 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:14,265 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-23 21:19:14,265 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:14,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:14,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1655961772, now seen corresponding path program 61 times [2018-09-23 21:19:14,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:14,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:14,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:14,266 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:14,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:15,768 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:15,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:15,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:15,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:15,859 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:15,859 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 21:19:15,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 21:19:15,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 21:19:15,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:19:15,860 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-09-23 21:19:15,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:15,963 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-23 21:19:15,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 21:19:15,963 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-09-23 21:19:15,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:15,964 INFO L225 Difference]: With dead ends: 68 [2018-09-23 21:19:15,964 INFO L226 Difference]: Without dead ends: 66 [2018-09-23 21:19:15,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:19:15,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-23 21:19:15,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-23 21:19:15,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-23 21:19:15,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-23 21:19:15,967 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-23 21:19:15,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:15,967 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-23 21:19:15,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 21:19:15,967 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-23 21:19:15,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-23 21:19:15,967 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:15,968 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-23 21:19:15,968 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:15,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:15,968 INFO L82 PathProgramCache]: Analyzing trace with hash -204790813, now seen corresponding path program 62 times [2018-09-23 21:19:15,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:15,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:15,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:15,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:15,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:19,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:19,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:19,050 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:19:19,098 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:19:19,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:19,101 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:19,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:19,142 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:19,142 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-23 21:19:19,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 21:19:19,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 21:19:19,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:19:19,144 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-09-23 21:19:19,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:19,293 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-23 21:19:19,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 21:19:19,293 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-09-23 21:19:19,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:19,294 INFO L225 Difference]: With dead ends: 69 [2018-09-23 21:19:19,294 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 21:19:19,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:19:19,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 21:19:19,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 21:19:19,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 21:19:19,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-23 21:19:19,297 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-23 21:19:19,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:19,298 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-23 21:19:19,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 21:19:19,298 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-23 21:19:19,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 21:19:19,298 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:19,298 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-23 21:19:19,298 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:19,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:19,299 INFO L82 PathProgramCache]: Analyzing trace with hash -2053546100, now seen corresponding path program 63 times [2018-09-23 21:19:19,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:19,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:19,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:19,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:19,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:21,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:21,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:21,457 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:19:21,524 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-23 21:19:21,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:21,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:21,559 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:21,559 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-23 21:19:21,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 21:19:21,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 21:19:21,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:19:21,560 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-09-23 21:19:21,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:21,669 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-23 21:19:21,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 21:19:21,672 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-09-23 21:19:21,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:21,672 INFO L225 Difference]: With dead ends: 70 [2018-09-23 21:19:21,672 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 21:19:21,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:19:21,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 21:19:21,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-23 21:19:21,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-23 21:19:21,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-23 21:19:21,676 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-23 21:19:21,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:21,676 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-23 21:19:21,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 21:19:21,677 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-23 21:19:21,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-23 21:19:21,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:21,677 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-23 21:19:21,678 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:21,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:21,678 INFO L82 PathProgramCache]: Analyzing trace with hash 764582147, now seen corresponding path program 64 times [2018-09-23 21:19:21,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:21,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:21,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:21,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:21,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:23,658 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:23,658 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:23,667 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:19:23,720 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:19:23,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:23,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:23,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:23,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-23 21:19:23,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 21:19:23,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 21:19:23,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 21:19:23,769 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-09-23 21:19:23,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:23,942 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-23 21:19:23,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 21:19:23,943 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-09-23 21:19:23,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:23,943 INFO L225 Difference]: With dead ends: 71 [2018-09-23 21:19:23,943 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 21:19:23,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 21:19:23,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 21:19:23,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 21:19:23,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 21:19:23,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-23 21:19:23,946 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-23 21:19:23,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:23,946 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-23 21:19:23,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 21:19:23,946 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-23 21:19:23,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 21:19:23,946 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:23,947 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-23 21:19:23,947 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:23,947 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:23,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2067755412, now seen corresponding path program 65 times [2018-09-23 21:19:23,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:23,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:23,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:23,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:23,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:25,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:25,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:25,552 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:19:25,624 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-23 21:19:25,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:25,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:25,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:25,676 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:25,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 21:19:25,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 21:19:25,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 21:19:25,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:19:25,678 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-09-23 21:19:26,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:26,021 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-23 21:19:26,022 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 21:19:26,022 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-09-23 21:19:26,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:26,022 INFO L225 Difference]: With dead ends: 72 [2018-09-23 21:19:26,022 INFO L226 Difference]: Without dead ends: 70 [2018-09-23 21:19:26,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:19:26,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-23 21:19:26,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-23 21:19:26,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 21:19:26,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-23 21:19:26,025 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-23 21:19:26,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:26,026 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-23 21:19:26,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 21:19:26,026 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-23 21:19:26,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-23 21:19:26,026 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:26,026 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-23 21:19:26,026 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:26,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:26,027 INFO L82 PathProgramCache]: Analyzing trace with hash 324093475, now seen corresponding path program 66 times [2018-09-23 21:19:26,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:26,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:26,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:26,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:26,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:27,805 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:27,805 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:27,813 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:19:27,880 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-23 21:19:27,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:27,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:27,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:27,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:27,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-23 21:19:27,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 21:19:27,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 21:19:27,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:19:27,937 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-09-23 21:19:28,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:28,142 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-23 21:19:28,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 21:19:28,142 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-09-23 21:19:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:28,143 INFO L225 Difference]: With dead ends: 73 [2018-09-23 21:19:28,143 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 21:19:28,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:19:28,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 21:19:28,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-23 21:19:28,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 21:19:28,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-23 21:19:28,147 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-23 21:19:28,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:28,147 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-23 21:19:28,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 21:19:28,148 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-23 21:19:28,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 21:19:28,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:28,149 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-23 21:19:28,149 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:28,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:28,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1456964940, now seen corresponding path program 67 times [2018-09-23 21:19:28,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:28,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:28,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:28,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:28,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:29,825 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:29,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:29,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:29,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:29,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:29,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 21:19:29,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 21:19:29,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 21:19:29,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:19:29,933 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-09-23 21:19:30,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:30,277 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-23 21:19:30,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 21:19:30,277 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-09-23 21:19:30,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:30,278 INFO L225 Difference]: With dead ends: 74 [2018-09-23 21:19:30,278 INFO L226 Difference]: Without dead ends: 72 [2018-09-23 21:19:30,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:19:30,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-23 21:19:30,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-23 21:19:30,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-23 21:19:30,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-23 21:19:30,281 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-23 21:19:30,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:30,281 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-23 21:19:30,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 21:19:30,281 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-23 21:19:30,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-23 21:19:30,281 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:30,281 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-23 21:19:30,282 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:30,282 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:30,282 INFO L82 PathProgramCache]: Analyzing trace with hash -2078725309, now seen corresponding path program 68 times [2018-09-23 21:19:30,282 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:30,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:30,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:30,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:30,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:32,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:32,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:32,094 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:19:32,147 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:19:32,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:32,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:32,182 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:32,182 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-23 21:19:32,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 21:19:32,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 21:19:32,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:19:32,183 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-09-23 21:19:32,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:32,418 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-23 21:19:32,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 21:19:32,419 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-09-23 21:19:32,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:32,419 INFO L225 Difference]: With dead ends: 75 [2018-09-23 21:19:32,419 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 21:19:32,419 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 [2018-09-23 21:19:32,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 21:19:32,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 21:19:32,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 21:19:32,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-23 21:19:32,421 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-23 21:19:32,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:32,422 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-23 21:19:32,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 21:19:32,422 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-23 21:19:32,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 21:19:32,422 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:32,422 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-23 21:19:32,423 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:32,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:32,423 INFO L82 PathProgramCache]: Analyzing trace with hash -15973332, now seen corresponding path program 69 times [2018-09-23 21:19:32,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:32,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:32,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:32,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:32,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:34,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:34,216 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:34,222 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:19:34,292 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-23 21:19:34,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:34,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:34,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:34,345 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:34,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-23 21:19:34,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 21:19:34,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 21:19:34,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:19:34,348 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-09-23 21:19:35,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:35,670 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-23 21:19:35,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 21:19:35,671 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-09-23 21:19:35,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:35,671 INFO L225 Difference]: With dead ends: 76 [2018-09-23 21:19:35,671 INFO L226 Difference]: Without dead ends: 74 [2018-09-23 21:19:35,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:19:35,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-23 21:19:35,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-23 21:19:35,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-23 21:19:35,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-23 21:19:35,674 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-23 21:19:35,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:35,675 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-23 21:19:35,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 21:19:35,675 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-23 21:19:35,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-23 21:19:35,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:35,676 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-23 21:19:35,676 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:35,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:35,676 INFO L82 PathProgramCache]: Analyzing trace with hash -495171485, now seen corresponding path program 70 times [2018-09-23 21:19:35,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:35,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:35,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:35,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:35,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:37,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:37,730 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:37,737 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:19:37,805 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:19:37,805 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:37,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:37,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:37,861 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:37,862 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-23 21:19:37,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-23 21:19:37,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-23 21:19:37,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 21:19:37,863 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-09-23 21:19:38,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:38,059 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-23 21:19:38,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 21:19:38,060 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-09-23 21:19:38,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:38,060 INFO L225 Difference]: With dead ends: 77 [2018-09-23 21:19:38,061 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 21:19:38,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 21:19:38,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 21:19:38,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-23 21:19:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 21:19:38,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-23 21:19:38,063 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-23 21:19:38,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:38,064 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-23 21:19:38,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-23 21:19:38,064 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-23 21:19:38,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 21:19:38,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:38,064 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-23 21:19:38,065 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:38,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:38,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1829554956, now seen corresponding path program 71 times [2018-09-23 21:19:38,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:38,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:38,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:38,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:38,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:39,939 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:39,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:39,946 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:19:40,024 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-23 21:19:40,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:40,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:40,074 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:40,074 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-23 21:19:40,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 21:19:40,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 21:19:40,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:19:40,075 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-09-23 21:19:40,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:40,205 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-23 21:19:40,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 21:19:40,206 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-09-23 21:19:40,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:40,206 INFO L225 Difference]: With dead ends: 78 [2018-09-23 21:19:40,206 INFO L226 Difference]: Without dead ends: 76 [2018-09-23 21:19:40,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:19:40,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-23 21:19:40,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-23 21:19:40,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-23 21:19:40,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-23 21:19:40,209 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-23 21:19:40,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:40,210 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-23 21:19:40,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 21:19:40,210 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-23 21:19:40,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-23 21:19:40,210 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:40,211 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-23 21:19:40,211 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:40,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:40,211 INFO L82 PathProgramCache]: Analyzing trace with hash 881630595, now seen corresponding path program 72 times [2018-09-23 21:19:40,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:40,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:40,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:40,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:40,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:42,246 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:42,246 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:42,253 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:19:42,324 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 21:19:42,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:42,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:42,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:42,375 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-23 21:19:42,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-23 21:19:42,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-23 21:19:42,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 21:19:42,376 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-09-23 21:19:42,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:42,584 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-23 21:19:42,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 21:19:42,584 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-09-23 21:19:42,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:42,585 INFO L225 Difference]: With dead ends: 79 [2018-09-23 21:19:42,585 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 21:19:42,585 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 21:19:42,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 21:19:42,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 21:19:42,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 21:19:42,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-23 21:19:42,588 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-23 21:19:42,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:42,588 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-23 21:19:42,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-23 21:19:42,588 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-23 21:19:42,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 21:19:42,589 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:42,589 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-23 21:19:42,589 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:42,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:42,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1560746476, now seen corresponding path program 73 times [2018-09-23 21:19:42,590 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:42,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:42,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:42,590 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:42,590 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:44,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:44,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:44,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:44,712 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:44,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:44,815 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:44,816 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-23 21:19:44,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 21:19:44,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 21:19:44,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:19:44,817 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-09-23 21:19:44,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:44,966 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-23 21:19:44,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 21:19:44,967 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-09-23 21:19:44,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:44,967 INFO L225 Difference]: With dead ends: 80 [2018-09-23 21:19:44,968 INFO L226 Difference]: Without dead ends: 78 [2018-09-23 21:19:44,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:19:44,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-23 21:19:44,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-23 21:19:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-23 21:19:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-23 21:19:44,970 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-23 21:19:44,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:44,970 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-23 21:19:44,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 21:19:44,970 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-23 21:19:44,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-23 21:19:44,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:44,971 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-23 21:19:44,971 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:44,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:44,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1138502307, now seen corresponding path program 74 times [2018-09-23 21:19:44,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:44,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:44,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:44,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:19:44,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:47,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:47,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:47,021 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:19:47,078 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:19:47,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:47,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:47,116 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:47,116 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-23 21:19:47,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 21:19:47,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 21:19:47,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 21:19:47,118 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-09-23 21:19:47,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:47,283 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-23 21:19:47,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 21:19:47,283 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-09-23 21:19:47,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:47,284 INFO L225 Difference]: With dead ends: 81 [2018-09-23 21:19:47,284 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 21:19:47,284 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 [2018-09-23 21:19:47,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 21:19:47,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 21:19:47,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 21:19:47,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-23 21:19:47,287 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-23 21:19:47,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:47,287 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-23 21:19:47,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 21:19:47,287 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-23 21:19:47,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 21:19:47,288 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:47,288 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-23 21:19:47,289 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:47,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:47,289 INFO L82 PathProgramCache]: Analyzing trace with hash 933834956, now seen corresponding path program 75 times [2018-09-23 21:19:47,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:47,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:47,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:47,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:47,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:49,672 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:49,672 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:49,680 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:19:49,760 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-23 21:19:49,761 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:49,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:49,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:49,801 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:49,802 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-23 21:19:49,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 21:19:49,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 21:19:49,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:19:49,803 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-09-23 21:19:49,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:49,940 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-23 21:19:49,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 21:19:49,941 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-09-23 21:19:49,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:49,941 INFO L225 Difference]: With dead ends: 82 [2018-09-23 21:19:49,941 INFO L226 Difference]: Without dead ends: 80 [2018-09-23 21:19:49,942 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 [2018-09-23 21:19:49,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-23 21:19:49,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-23 21:19:49,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-23 21:19:49,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-23 21:19:49,944 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-23 21:19:49,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:49,945 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-23 21:19:49,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 21:19:49,945 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-23 21:19:49,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-23 21:19:49,945 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:49,945 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-23 21:19:49,945 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:49,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:49,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1115885629, now seen corresponding path program 76 times [2018-09-23 21:19:49,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:49,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:49,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:49,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:49,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:52,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:52,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:52,149 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:19:52,218 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:19:52,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:52,221 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:52,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:52,261 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:52,262 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-23 21:19:52,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-23 21:19:52,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-23 21:19:52,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 21:19:52,263 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-09-23 21:19:53,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:53,419 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-23 21:19:53,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 21:19:53,419 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-09-23 21:19:53,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:53,420 INFO L225 Difference]: With dead ends: 83 [2018-09-23 21:19:53,420 INFO L226 Difference]: Without dead ends: 81 [2018-09-23 21:19:53,421 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 [2018-09-23 21:19:53,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-23 21:19:53,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-23 21:19:53,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 21:19:53,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-23 21:19:53,423 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-23 21:19:53,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:53,424 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-23 21:19:53,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-23 21:19:53,424 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-23 21:19:53,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 21:19:53,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:53,425 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-23 21:19:53,425 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:53,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:53,425 INFO L82 PathProgramCache]: Analyzing trace with hash -232714324, now seen corresponding path program 77 times [2018-09-23 21:19:53,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:53,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:53,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:53,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:53,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:19:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:56,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:19:56,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:19:56,243 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:19:56,328 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-23 21:19:56,328 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:19:56,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:19:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:19:56,379 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:19:56,379 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-23 21:19:56,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 21:19:56,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 21:19:56,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:19:56,381 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-09-23 21:19:57,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:19:57,911 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-23 21:19:57,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 21:19:57,911 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-09-23 21:19:57,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:19:57,912 INFO L225 Difference]: With dead ends: 84 [2018-09-23 21:19:57,912 INFO L226 Difference]: Without dead ends: 82 [2018-09-23 21:19:57,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:19:57,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-23 21:19:57,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-23 21:19:57,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-23 21:19:57,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-23 21:19:57,916 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-23 21:19:57,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:19:57,916 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-23 21:19:57,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 21:19:57,916 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-23 21:19:57,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-23 21:19:57,917 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:19:57,917 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-23 21:19:57,917 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:19:57,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:19:57,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1375792355, now seen corresponding path program 78 times [2018-09-23 21:19:57,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:19:57,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:19:57,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:57,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:19:57,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:19:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:00,286 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:00,286 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:00,293 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:20:00,542 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-23 21:20:00,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:00,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:00,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:00,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-23 21:20:00,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-23 21:20:00,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-23 21:20:00,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 21:20:00,598 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-09-23 21:20:00,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:00,798 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-23 21:20:00,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 21:20:00,799 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-09-23 21:20:00,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:00,800 INFO L225 Difference]: With dead ends: 85 [2018-09-23 21:20:00,800 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 21:20:00,800 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 21:20:00,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 21:20:00,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 21:20:00,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 21:20:00,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-23 21:20:00,802 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-23 21:20:00,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:00,802 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-23 21:20:00,802 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-23 21:20:00,803 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-23 21:20:00,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 21:20:00,804 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:00,804 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-23 21:20:00,804 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:00,804 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:00,804 INFO L82 PathProgramCache]: Analyzing trace with hash -300108148, now seen corresponding path program 79 times [2018-09-23 21:20:00,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:00,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:00,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:00,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:00,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:03,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:03,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:03,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:20:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:03,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:03,903 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:03,903 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-23 21:20:03,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 21:20:03,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 21:20:03,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:20:03,905 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-09-23 21:20:04,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:04,068 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-23 21:20:04,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 21:20:04,069 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-09-23 21:20:04,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:04,069 INFO L225 Difference]: With dead ends: 86 [2018-09-23 21:20:04,069 INFO L226 Difference]: Without dead ends: 84 [2018-09-23 21:20:04,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:20:04,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-23 21:20:04,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-23 21:20:04,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-23 21:20:04,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-23 21:20:04,072 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-23 21:20:04,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:04,072 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-23 21:20:04,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 21:20:04,072 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-23 21:20:04,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-23 21:20:04,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:04,073 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-23 21:20:04,073 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:04,073 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:04,073 INFO L82 PathProgramCache]: Analyzing trace with hash -713416189, now seen corresponding path program 80 times [2018-09-23 21:20:04,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:04,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:04,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:04,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:20:04,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:06,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:06,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:06,419 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:20:06,482 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:20:06,482 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:06,486 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:06,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:06,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-23 21:20:06,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-23 21:20:06,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-23 21:20:06,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 21:20:06,523 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-09-23 21:20:06,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:06,705 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-23 21:20:06,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 21:20:06,706 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-09-23 21:20:06,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:06,706 INFO L225 Difference]: With dead ends: 87 [2018-09-23 21:20:06,706 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 21:20:06,707 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 21:20:06,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 21:20:06,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 21:20:06,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 21:20:06,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-23 21:20:06,709 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-23 21:20:06,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:06,709 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-23 21:20:06,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-23 21:20:06,709 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-23 21:20:06,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 21:20:06,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:06,709 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-23 21:20:06,710 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:06,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:06,710 INFO L82 PathProgramCache]: Analyzing trace with hash -641063572, now seen corresponding path program 81 times [2018-09-23 21:20:06,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:06,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:06,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:06,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:06,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:09,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:09,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:09,731 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:20:09,819 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-23 21:20:09,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:09,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:09,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:09,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-23 21:20:09,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 21:20:09,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 21:20:09,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:20:09,862 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-09-23 21:20:10,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:10,032 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-23 21:20:10,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-23 21:20:10,033 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-09-23 21:20:10,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:10,033 INFO L225 Difference]: With dead ends: 88 [2018-09-23 21:20:10,033 INFO L226 Difference]: Without dead ends: 86 [2018-09-23 21:20:10,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:20:10,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-23 21:20:10,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-23 21:20:10,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-23 21:20:10,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-23 21:20:10,036 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-23 21:20:10,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:10,037 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-23 21:20:10,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 21:20:10,037 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-23 21:20:10,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-23 21:20:10,037 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:10,037 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-23 21:20:10,037 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:10,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:10,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1601867555, now seen corresponding path program 82 times [2018-09-23 21:20:10,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:10,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:10,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:10,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:10,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:12,625 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:12,625 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:12,632 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:20:12,705 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:20:12,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:12,707 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:12,758 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:12,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-23 21:20:12,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-23 21:20:12,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-23 21:20:12,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 21:20:12,760 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-09-23 21:20:12,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:12,962 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-23 21:20:12,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-23 21:20:12,963 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-09-23 21:20:12,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:12,963 INFO L225 Difference]: With dead ends: 89 [2018-09-23 21:20:12,964 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 21:20:12,964 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 21:20:12,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 21:20:12,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-23 21:20:12,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-23 21:20:12,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-23 21:20:12,966 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-23 21:20:12,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:12,967 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-23 21:20:12,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-23 21:20:12,967 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-23 21:20:12,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 21:20:12,967 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:12,968 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-23 21:20:12,968 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:12,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:12,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1881711540, now seen corresponding path program 83 times [2018-09-23 21:20:12,968 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:12,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:12,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:12,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:12,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:15,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:15,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:15,882 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:20:15,973 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-23 21:20:15,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:15,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:16,011 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:16,011 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-23 21:20:16,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 21:20:16,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 21:20:16,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 21:20:16,012 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-09-23 21:20:16,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:16,204 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-23 21:20:16,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-23 21:20:16,205 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-09-23 21:20:16,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:16,205 INFO L225 Difference]: With dead ends: 90 [2018-09-23 21:20:16,205 INFO L226 Difference]: Without dead ends: 88 [2018-09-23 21:20:16,206 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 [2018-09-23 21:20:16,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-23 21:20:16,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-23 21:20:16,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-23 21:20:16,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-23 21:20:16,208 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-23 21:20:16,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:16,208 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-23 21:20:16,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 21:20:16,208 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-23 21:20:16,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-23 21:20:16,209 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:16,209 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-23 21:20:16,209 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:16,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:16,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1796486211, now seen corresponding path program 84 times [2018-09-23 21:20:16,209 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:16,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:16,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:16,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:16,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:19,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:19,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:19,049 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:20:19,136 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-23 21:20:19,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:19,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:19,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:19,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-23 21:20:19,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-23 21:20:19,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-23 21:20:19,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 21:20:19,186 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-09-23 21:20:19,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:19,389 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-23 21:20:19,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-23 21:20:19,389 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-09-23 21:20:19,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:19,390 INFO L225 Difference]: With dead ends: 91 [2018-09-23 21:20:19,390 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 21:20:19,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 21:20:19,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 21:20:19,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-23 21:20:19,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 21:20:19,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-23 21:20:19,393 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-23 21:20:19,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:19,393 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-23 21:20:19,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-23 21:20:19,393 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-23 21:20:19,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 21:20:19,394 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:19,394 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-23 21:20:19,394 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:19,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:19,395 INFO L82 PathProgramCache]: Analyzing trace with hash -143500500, now seen corresponding path program 85 times [2018-09-23 21:20:19,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:19,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:19,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:19,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:19,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:19,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:22,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:22,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:22,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:20:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:22,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:22,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:22,130 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-23 21:20:22,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 21:20:22,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 21:20:22,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 21:20:22,132 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-09-23 21:20:22,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:22,288 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-23 21:20:22,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-23 21:20:22,288 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-09-23 21:20:22,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:22,289 INFO L225 Difference]: With dead ends: 92 [2018-09-23 21:20:22,289 INFO L226 Difference]: Without dead ends: 90 [2018-09-23 21:20:22,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 21:20:22,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-23 21:20:22,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-23 21:20:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-23 21:20:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-23 21:20:22,293 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-23 21:20:22,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:22,293 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-23 21:20:22,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 21:20:22,293 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-23 21:20:22,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-23 21:20:22,294 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:22,294 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-23 21:20:22,294 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:22,294 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:22,294 INFO L82 PathProgramCache]: Analyzing trace with hash -153546397, now seen corresponding path program 86 times [2018-09-23 21:20:22,294 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:22,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:22,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:22,295 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:20:22,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:22,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:25,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:25,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:25,343 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:20:25,410 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:20:25,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:25,413 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:25,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:25,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:25,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-23 21:20:25,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-23 21:20:25,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-23 21:20:25,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 21:20:25,462 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-09-23 21:20:25,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:25,655 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-23 21:20:25,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 21:20:25,655 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-09-23 21:20:25,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:25,656 INFO L225 Difference]: With dead ends: 93 [2018-09-23 21:20:25,656 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 21:20:25,656 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 [2018-09-23 21:20:25,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 21:20:25,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 21:20:25,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 21:20:25,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-23 21:20:25,659 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-23 21:20:25,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:25,659 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-23 21:20:25,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-23 21:20:25,659 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-23 21:20:25,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 21:20:25,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:25,660 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-23 21:20:25,660 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:25,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:25,661 INFO L82 PathProgramCache]: Analyzing trace with hash -464969204, now seen corresponding path program 87 times [2018-09-23 21:20:25,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:25,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:25,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:25,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:25,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:28,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:28,496 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:28,497 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:28,504 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:20:28,606 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-23 21:20:28,606 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:28,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:28,650 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:28,650 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-23 21:20:28,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 21:20:28,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 21:20:28,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:20:28,651 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-09-23 21:20:28,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:28,883 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-23 21:20:28,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-23 21:20:28,883 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-09-23 21:20:28,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:28,884 INFO L225 Difference]: With dead ends: 94 [2018-09-23 21:20:28,884 INFO L226 Difference]: Without dead ends: 92 [2018-09-23 21:20:28,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:20:28,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-23 21:20:28,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-23 21:20:28,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-23 21:20:28,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-23 21:20:28,888 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-23 21:20:28,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:28,888 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-23 21:20:28,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 21:20:28,889 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-23 21:20:28,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-23 21:20:28,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:28,889 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-23 21:20:28,890 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:28,890 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:28,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1529141629, now seen corresponding path program 88 times [2018-09-23 21:20:28,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:28,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:28,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:28,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:28,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:31,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:31,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:31,681 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:20:31,749 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:20:31,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:31,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:31,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:31,788 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-23 21:20:31,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-23 21:20:31,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-23 21:20:31,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 21:20:31,790 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-09-23 21:20:31,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:31,926 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-23 21:20:31,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-23 21:20:31,927 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-09-23 21:20:31,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:31,928 INFO L225 Difference]: With dead ends: 95 [2018-09-23 21:20:31,928 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 21:20:31,928 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 [2018-09-23 21:20:31,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 21:20:31,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-23 21:20:31,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-23 21:20:31,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-23 21:20:31,931 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-23 21:20:31,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:31,931 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-23 21:20:31,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-23 21:20:31,931 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-23 21:20:31,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 21:20:31,932 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:31,932 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-23 21:20:31,932 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:31,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:31,932 INFO L82 PathProgramCache]: Analyzing trace with hash -158748436, now seen corresponding path program 89 times [2018-09-23 21:20:31,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:31,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:31,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:31,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:31,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:35,049 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:35,049 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:35,057 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:20:35,161 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-23 21:20:35,161 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:35,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:35,200 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:35,200 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-23 21:20:35,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 21:20:35,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 21:20:35,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 21:20:35,201 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-09-23 21:20:35,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:35,410 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-23 21:20:35,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-23 21:20:35,410 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-09-23 21:20:35,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:35,411 INFO L225 Difference]: With dead ends: 96 [2018-09-23 21:20:35,411 INFO L226 Difference]: Without dead ends: 94 [2018-09-23 21:20:35,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 21:20:35,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-23 21:20:35,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-23 21:20:35,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-23 21:20:35,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-23 21:20:35,413 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-23 21:20:35,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:35,413 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-23 21:20:35,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 21:20:35,414 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-23 21:20:35,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-23 21:20:35,414 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:35,414 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-23 21:20:35,414 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:35,414 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:35,415 INFO L82 PathProgramCache]: Analyzing trace with hash -626232413, now seen corresponding path program 90 times [2018-09-23 21:20:35,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:35,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:35,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:35,415 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:35,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:38,335 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:38,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:38,343 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:20:38,439 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-23 21:20:38,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:38,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:38,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:38,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:38,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-23 21:20:38,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-23 21:20:38,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-23 21:20:38,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 21:20:38,482 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-09-23 21:20:38,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:38,768 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-23 21:20:38,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-23 21:20:38,769 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-09-23 21:20:38,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:38,770 INFO L225 Difference]: With dead ends: 97 [2018-09-23 21:20:38,770 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 21:20:38,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 21:20:38,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 21:20:38,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-23 21:20:38,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 21:20:38,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-23 21:20:38,773 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-23 21:20:38,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:38,773 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-23 21:20:38,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-23 21:20:38,774 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-23 21:20:38,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 21:20:38,774 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:38,774 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-23 21:20:38,774 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:38,775 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:38,775 INFO L82 PathProgramCache]: Analyzing trace with hash 2061633484, now seen corresponding path program 91 times [2018-09-23 21:20:38,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:38,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:38,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:38,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:38,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:41,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:41,830 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:41,830 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:41,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:20:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:41,912 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:41,948 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:41,948 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-23 21:20:41,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 21:20:41,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 21:20:41,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 21:20:41,949 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-09-23 21:20:42,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:42,158 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-23 21:20:42,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-23 21:20:42,159 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-09-23 21:20:42,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:42,159 INFO L225 Difference]: With dead ends: 98 [2018-09-23 21:20:42,159 INFO L226 Difference]: Without dead ends: 96 [2018-09-23 21:20:42,160 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 [2018-09-23 21:20:42,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-23 21:20:42,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-23 21:20:42,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-23 21:20:42,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-23 21:20:42,162 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-23 21:20:42,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:42,162 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-23 21:20:42,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 21:20:42,162 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-23 21:20:42,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-23 21:20:42,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:42,163 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-23 21:20:42,163 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:42,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:42,164 INFO L82 PathProgramCache]: Analyzing trace with hash -513869629, now seen corresponding path program 92 times [2018-09-23 21:20:42,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:42,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:42,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:42,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:20:42,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:46,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:46,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:46,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:46,134 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:20:46,207 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:20:46,207 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:46,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:46,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:46,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-23 21:20:46,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-23 21:20:46,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-23 21:20:46,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 21:20:46,260 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-09-23 21:20:46,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:46,452 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-23 21:20:46,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-23 21:20:46,452 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-09-23 21:20:46,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:46,453 INFO L225 Difference]: With dead ends: 99 [2018-09-23 21:20:46,453 INFO L226 Difference]: Without dead ends: 97 [2018-09-23 21:20:46,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 21:20:46,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-23 21:20:46,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-23 21:20:46,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 21:20:46,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-23 21:20:46,455 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-23 21:20:46,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:46,455 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-23 21:20:46,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-23 21:20:46,455 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-23 21:20:46,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-23 21:20:46,456 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:46,456 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-23 21:20:46,456 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:46,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:46,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1249912492, now seen corresponding path program 93 times [2018-09-23 21:20:46,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:46,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:46,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:46,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:46,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:50,075 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:50,075 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:50,082 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:20:50,181 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-23 21:20:50,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:50,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:50,233 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:50,233 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-23 21:20:50,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 21:20:50,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 21:20:50,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 21:20:50,234 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-09-23 21:20:50,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:50,424 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-23 21:20:50,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-23 21:20:50,424 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-09-23 21:20:50,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:50,425 INFO L225 Difference]: With dead ends: 100 [2018-09-23 21:20:50,425 INFO L226 Difference]: Without dead ends: 98 [2018-09-23 21:20:50,425 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 21:20:50,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-23 21:20:50,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-23 21:20:50,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-23 21:20:50,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-23 21:20:50,427 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-23 21:20:50,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:50,427 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-23 21:20:50,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 21:20:50,428 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-23 21:20:50,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-23 21:20:50,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:50,428 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-23 21:20:50,428 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:50,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:50,429 INFO L82 PathProgramCache]: Analyzing trace with hash 92583395, now seen corresponding path program 94 times [2018-09-23 21:20:50,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:50,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:50,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:50,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:50,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:53,574 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:53,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:53,583 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:20:53,658 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:20:53,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:53,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:53,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:53,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-23 21:20:53,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-23 21:20:53,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-23 21:20:53,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 21:20:53,699 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-09-23 21:20:53,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:53,887 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-23 21:20:53,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-23 21:20:53,887 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-09-23 21:20:53,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:53,888 INFO L225 Difference]: With dead ends: 101 [2018-09-23 21:20:53,888 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 21:20:53,890 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 21:20:53,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 21:20:53,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-23 21:20:53,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 21:20:53,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-23 21:20:53,894 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-23 21:20:53,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:53,894 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-23 21:20:53,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-23 21:20:53,894 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-23 21:20:53,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 21:20:53,895 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:53,895 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-23 21:20:53,895 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:53,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:53,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1424880244, now seen corresponding path program 95 times [2018-09-23 21:20:53,895 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:53,895 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:53,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:53,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:53,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:53,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:20:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:57,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:20:57,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:20:57,370 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:20:57,484 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-23 21:20:57,485 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:20:57,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:20:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:20:57,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:20:57,527 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-23 21:20:57,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 21:20:57,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 21:20:57,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:20:57,528 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-09-23 21:20:58,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:20:58,314 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-23 21:20:58,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-23 21:20:58,314 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-09-23 21:20:58,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:20:58,315 INFO L225 Difference]: With dead ends: 102 [2018-09-23 21:20:58,315 INFO L226 Difference]: Without dead ends: 100 [2018-09-23 21:20:58,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:20:58,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-23 21:20:58,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-23 21:20:58,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-23 21:20:58,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-23 21:20:58,317 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-23 21:20:58,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:20:58,318 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-23 21:20:58,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 21:20:58,318 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-23 21:20:58,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-23 21:20:58,318 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:20:58,318 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-23 21:20:58,319 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:20:58,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:20:58,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1221612797, now seen corresponding path program 96 times [2018-09-23 21:20:58,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:20:58,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:20:58,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:58,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:20:58,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:20:58,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:01,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:01,903 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:01,910 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:21:02,013 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-23 21:21:02,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:02,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:02,055 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:02,055 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-23 21:21:02,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-23 21:21:02,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-23 21:21:02,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 21:21:02,057 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-09-23 21:21:02,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:02,317 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-23 21:21:02,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-23 21:21:02,317 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-09-23 21:21:02,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:02,318 INFO L225 Difference]: With dead ends: 103 [2018-09-23 21:21:02,318 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 21:21:02,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 21:21:02,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 21:21:02,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 21:21:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 21:21:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-23 21:21:02,320 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-23 21:21:02,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:02,320 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-23 21:21:02,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-23 21:21:02,320 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-23 21:21:02,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 21:21:02,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:02,321 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-23 21:21:02,321 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:02,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:02,321 INFO L82 PathProgramCache]: Analyzing trace with hash 784710764, now seen corresponding path program 97 times [2018-09-23 21:21:02,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:02,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:02,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:02,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:02,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:06,014 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:06,014 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:06,020 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:06,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:06,134 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:06,135 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-23 21:21:06,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-23 21:21:06,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-23 21:21:06,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 21:21:06,136 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-09-23 21:21:06,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:06,376 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-23 21:21:06,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-23 21:21:06,376 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-09-23 21:21:06,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:06,377 INFO L225 Difference]: With dead ends: 104 [2018-09-23 21:21:06,377 INFO L226 Difference]: Without dead ends: 102 [2018-09-23 21:21:06,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 21:21:06,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-23 21:21:06,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-23 21:21:06,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-23 21:21:06,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-23 21:21:06,380 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-23 21:21:06,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:06,380 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-23 21:21:06,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-23 21:21:06,380 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-23 21:21:06,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-23 21:21:06,381 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:06,381 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-23 21:21:06,381 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:06,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:06,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1443768285, now seen corresponding path program 98 times [2018-09-23 21:21:06,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:06,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:06,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:06,382 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:06,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:06,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:10,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:10,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:10,107 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:21:10,182 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:21:10,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:10,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:10,223 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:10,223 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-23 21:21:10,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-23 21:21:10,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-23 21:21:10,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 21:21:10,225 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-09-23 21:21:10,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:10,420 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-23 21:21:10,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-23 21:21:10,420 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-09-23 21:21:10,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:10,421 INFO L225 Difference]: With dead ends: 105 [2018-09-23 21:21:10,421 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 21:21:10,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 21:21:10,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 21:21:10,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-23 21:21:10,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 21:21:10,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-23 21:21:10,423 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-23 21:21:10,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:10,423 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-23 21:21:10,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-23 21:21:10,424 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-23 21:21:10,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 21:21:10,424 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:10,424 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-23 21:21:10,425 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:10,425 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:10,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1807142068, now seen corresponding path program 99 times [2018-09-23 21:21:10,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:10,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:10,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:10,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:10,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:13,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:13,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:13,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:21:14,061 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-23 21:21:14,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:14,064 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:14,104 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:14,104 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-23 21:21:14,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-23 21:21:14,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-23 21:21:14,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 21:21:14,105 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-09-23 21:21:14,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:14,367 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-23 21:21:14,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-23 21:21:14,367 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-09-23 21:21:14,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:14,368 INFO L225 Difference]: With dead ends: 106 [2018-09-23 21:21:14,368 INFO L226 Difference]: Without dead ends: 104 [2018-09-23 21:21:14,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 21:21:14,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-23 21:21:14,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-23 21:21:14,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-23 21:21:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-23 21:21:14,371 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-23 21:21:14,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:14,371 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-23 21:21:14,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-23 21:21:14,371 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-23 21:21:14,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-23 21:21:14,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:14,372 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-23 21:21:14,372 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:14,372 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:14,373 INFO L82 PathProgramCache]: Analyzing trace with hash -186827453, now seen corresponding path program 100 times [2018-09-23 21:21:14,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:14,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:14,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:14,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:14,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:18,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:18,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:18,281 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:21:18,361 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:21:18,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:18,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:18,404 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:18,404 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-23 21:21:18,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-23 21:21:18,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-23 21:21:18,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 21:21:18,406 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-09-23 21:21:18,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:18,596 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-23 21:21:18,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-23 21:21:18,596 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-09-23 21:21:18,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:18,598 INFO L225 Difference]: With dead ends: 107 [2018-09-23 21:21:18,598 INFO L226 Difference]: Without dead ends: 105 [2018-09-23 21:21:18,599 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 21:21:18,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-23 21:21:18,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-23 21:21:18,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-23 21:21:18,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-23 21:21:18,602 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-23 21:21:18,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:18,602 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-23 21:21:18,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-23 21:21:18,602 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-23 21:21:18,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 21:21:18,603 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:18,603 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-23 21:21:18,603 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:18,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:18,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1496681940, now seen corresponding path program 101 times [2018-09-23 21:21:18,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:18,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:18,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:18,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:18,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:22,566 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:22,566 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:22,573 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:21:22,699 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-23 21:21:22,699 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:22,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:22,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:22,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-23 21:21:22,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-23 21:21:22,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-23 21:21:22,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 21:21:22,744 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-09-23 21:21:22,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:22,964 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-23 21:21:22,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-23 21:21:22,964 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-09-23 21:21:22,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:22,965 INFO L225 Difference]: With dead ends: 108 [2018-09-23 21:21:22,965 INFO L226 Difference]: Without dead ends: 106 [2018-09-23 21:21:22,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 21:21:22,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-23 21:21:22,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-23 21:21:22,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-23 21:21:22,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-23 21:21:22,969 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-23 21:21:22,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:22,969 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-23 21:21:22,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-23 21:21:22,969 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-23 21:21:22,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-23 21:21:22,970 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:22,970 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-23 21:21:22,970 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:22,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:22,971 INFO L82 PathProgramCache]: Analyzing trace with hash 847501923, now seen corresponding path program 102 times [2018-09-23 21:21:22,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:22,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:22,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:22,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:22,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:26,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:26,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:26,988 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:21:27,100 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-23 21:21:27,100 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:27,104 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:27,144 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:27,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-23 21:21:27,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-23 21:21:27,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-23 21:21:27,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-23 21:21:27,146 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-09-23 21:21:27,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:27,409 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-23 21:21:27,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-23 21:21:27,410 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-09-23 21:21:27,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:27,410 INFO L225 Difference]: With dead ends: 109 [2018-09-23 21:21:27,410 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 21:21:27,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-23 21:21:27,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 21:21:27,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-23 21:21:27,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 21:21:27,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-23 21:21:27,413 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-23 21:21:27,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:27,413 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-23 21:21:27,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-23 21:21:27,414 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-23 21:21:27,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 21:21:27,414 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:27,415 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-23 21:21:27,415 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:27,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:27,415 INFO L82 PathProgramCache]: Analyzing trace with hash 502757644, now seen corresponding path program 103 times [2018-09-23 21:21:27,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:27,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:27,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:27,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:27,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:31,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:31,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:31,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:31,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:31,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:31,661 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:31,662 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-23 21:21:31,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-23 21:21:31,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-23 21:21:31,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 21:21:31,664 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-09-23 21:21:31,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:31,952 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-23 21:21:31,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-23 21:21:31,953 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-09-23 21:21:31,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:31,954 INFO L225 Difference]: With dead ends: 110 [2018-09-23 21:21:31,954 INFO L226 Difference]: Without dead ends: 108 [2018-09-23 21:21:31,954 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 21:21:31,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-23 21:21:31,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-23 21:21:31,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-23 21:21:31,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-23 21:21:31,956 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-23 21:21:31,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:31,956 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-23 21:21:31,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-23 21:21:31,957 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-23 21:21:31,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-23 21:21:31,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:31,957 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-23 21:21:31,957 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:31,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:31,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1594380413, now seen corresponding path program 104 times [2018-09-23 21:21:31,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:31,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:31,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:31,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:31,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:36,064 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:36,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:36,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:21:36,167 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:21:36,167 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:36,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:36,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:36,226 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:36,226 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-23 21:21:36,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-23 21:21:36,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-23 21:21:36,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 21:21:36,227 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-09-23 21:21:36,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:36,406 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-23 21:21:36,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-23 21:21:36,407 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-09-23 21:21:36,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:36,407 INFO L225 Difference]: With dead ends: 111 [2018-09-23 21:21:36,408 INFO L226 Difference]: Without dead ends: 109 [2018-09-23 21:21:36,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 21:21:36,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-23 21:21:36,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-23 21:21:36,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 21:21:36,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-23 21:21:36,410 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-23 21:21:36,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:36,411 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-23 21:21:36,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-23 21:21:36,411 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-23 21:21:36,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 21:21:36,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:36,412 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-23 21:21:36,412 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:36,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:36,412 INFO L82 PathProgramCache]: Analyzing trace with hash 2113816556, now seen corresponding path program 105 times [2018-09-23 21:21:36,412 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:36,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:36,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:36,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:36,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:40,655 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:40,655 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:40,662 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:21:40,788 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-23 21:21:40,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:40,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:40,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:40,831 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-23 21:21:40,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-23 21:21:40,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-23 21:21:40,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 21:21:40,832 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-09-23 21:21:41,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:41,143 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-23 21:21:41,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-23 21:21:41,143 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-09-23 21:21:41,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:41,144 INFO L225 Difference]: With dead ends: 112 [2018-09-23 21:21:41,144 INFO L226 Difference]: Without dead ends: 110 [2018-09-23 21:21:41,144 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 [2018-09-23 21:21:41,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-23 21:21:41,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-23 21:21:41,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-23 21:21:41,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-23 21:21:41,146 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-23 21:21:41,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:41,146 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-23 21:21:41,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-23 21:21:41,146 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-23 21:21:41,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-23 21:21:41,147 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:41,147 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-23 21:21:41,147 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:41,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:41,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1103805603, now seen corresponding path program 106 times [2018-09-23 21:21:41,148 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:41,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:41,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:41,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:41,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:45,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:45,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:45,191 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:21:45,275 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:21:45,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:45,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:45,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:45,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-23 21:21:45,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-23 21:21:45,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-23 21:21:45,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-23 21:21:45,321 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-09-23 21:21:45,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:45,641 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-23 21:21:45,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-23 21:21:45,641 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-09-23 21:21:45,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:45,642 INFO L225 Difference]: With dead ends: 113 [2018-09-23 21:21:45,642 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 21:21:45,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-23 21:21:45,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 21:21:45,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-23 21:21:45,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-23 21:21:45,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-23 21:21:45,644 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-23 21:21:45,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:45,645 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-23 21:21:45,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-23 21:21:45,645 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-23 21:21:45,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-23 21:21:45,645 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:45,645 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-23 21:21:45,645 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:45,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:45,646 INFO L82 PathProgramCache]: Analyzing trace with hash -141762868, now seen corresponding path program 107 times [2018-09-23 21:21:45,646 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:45,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:45,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:45,647 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:45,647 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:49,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:49,715 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:49,723 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:21:49,855 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-23 21:21:49,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:49,860 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:49,901 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:49,901 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-23 21:21:49,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-23 21:21:49,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-23 21:21:49,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 21:21:49,902 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-09-23 21:21:50,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:50,185 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-23 21:21:50,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-23 21:21:50,185 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-09-23 21:21:50,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:50,186 INFO L225 Difference]: With dead ends: 114 [2018-09-23 21:21:50,186 INFO L226 Difference]: Without dead ends: 112 [2018-09-23 21:21:50,186 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-23 21:21:50,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-23 21:21:50,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-23 21:21:50,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-23 21:21:50,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-23 21:21:50,188 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-23 21:21:50,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:50,189 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-23 21:21:50,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-23 21:21:50,189 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-23 21:21:50,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-23 21:21:50,189 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:50,189 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-09-23 21:21:50,189 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:50,190 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:50,190 INFO L82 PathProgramCache]: Analyzing trace with hash -99679805, now seen corresponding path program 108 times [2018-09-23 21:21:50,190 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:50,190 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:50,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:50,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:50,191 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:54,614 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:54,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:54,623 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:21:54,749 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-23 21:21:54,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:21:54,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:54,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:54,814 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:54,815 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-23 21:21:54,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-23 21:21:54,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-23 21:21:54,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-23 21:21:54,816 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-09-23 21:21:55,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:21:55,111 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-23 21:21:55,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-23 21:21:55,111 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-09-23 21:21:55,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:21:55,111 INFO L225 Difference]: With dead ends: 115 [2018-09-23 21:21:55,112 INFO L226 Difference]: Without dead ends: 113 [2018-09-23 21:21:55,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-23 21:21:55,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-23 21:21:55,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-23 21:21:55,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-23 21:21:55,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-23 21:21:55,114 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-23 21:21:55,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:21:55,114 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-23 21:21:55,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-23 21:21:55,114 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-23 21:21:55,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-23 21:21:55,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:21:55,115 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-09-23 21:21:55,115 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:21:55,115 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:21:55,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1204895148, now seen corresponding path program 109 times [2018-09-23 21:21:55,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:21:55,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:21:55,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:55,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:21:55,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:21:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:59,629 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:21:59,629 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:21:59,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:21:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:21:59,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:21:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:21:59,769 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:21:59,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-23 21:21:59,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-23 21:21:59,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-23 21:21:59,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 21:21:59,771 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-09-23 21:22:00,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:00,028 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-09-23 21:22:00,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-23 21:22:00,029 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-09-23 21:22:00,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:00,029 INFO L225 Difference]: With dead ends: 116 [2018-09-23 21:22:00,029 INFO L226 Difference]: Without dead ends: 114 [2018-09-23 21:22:00,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2018-09-23 21:22:00,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-23 21:22:00,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-23 21:22:00,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-23 21:22:00,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-23 21:22:00,033 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-09-23 21:22:00,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:00,033 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-23 21:22:00,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-23 21:22:00,033 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-23 21:22:00,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-23 21:22:00,034 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:00,034 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-09-23 21:22:00,034 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:00,034 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:00,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1302954269, now seen corresponding path program 110 times [2018-09-23 21:22:00,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:00,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:00,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:00,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:22:00,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:04,641 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:04,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:04,649 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:22:04,733 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:22:04,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:04,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:04,777 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:04,777 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-23 21:22:04,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-23 21:22:04,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-23 21:22:04,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-23 21:22:04,779 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-09-23 21:22:05,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:05,097 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-23 21:22:05,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-23 21:22:05,097 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-09-23 21:22:05,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:05,098 INFO L225 Difference]: With dead ends: 117 [2018-09-23 21:22:05,098 INFO L226 Difference]: Without dead ends: 115 [2018-09-23 21:22:05,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2018-09-23 21:22:05,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-23 21:22:05,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-23 21:22:05,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-23 21:22:05,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-23 21:22:05,101 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-09-23 21:22:05,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:05,101 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-23 21:22:05,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-23 21:22:05,101 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-23 21:22:05,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-23 21:22:05,102 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:05,102 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-09-23 21:22:05,102 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:05,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:05,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1736874868, now seen corresponding path program 111 times [2018-09-23 21:22:05,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:05,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:05,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:05,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:05,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:22:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:09,913 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:22:09,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:22:09,921 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:22:10,058 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-09-23 21:22:10,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:22:10,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:22:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:22:10,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:22:10,103 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-23 21:22:10,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-23 21:22:10,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-23 21:22:10,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 21:22:10,104 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 114 states. [2018-09-23 21:22:10,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:22:10,423 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-09-23 21:22:10,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-23 21:22:10,423 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-09-23 21:22:10,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:22:10,424 INFO L225 Difference]: With dead ends: 118 [2018-09-23 21:22:10,424 INFO L226 Difference]: Without dead ends: 116 [2018-09-23 21:22:10,424 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2018-09-23 21:22:10,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-23 21:22:10,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-23 21:22:10,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-23 21:22:10,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-23 21:22:10,427 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-09-23 21:22:10,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:22:10,427 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-23 21:22:10,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-23 21:22:10,427 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-23 21:22:10,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-23 21:22:10,428 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:22:10,428 INFO L375 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-09-23 21:22:10,428 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:22:10,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:22:10,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1991455747, now seen corresponding path program 112 times [2018-09-23 21:22:10,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:22:10,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:22:10,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:10,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:22:10,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:22:10,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 21:22:10,678 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 21:22:10,682 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 21:22:10,682 INFO L202 PluginConnector]: Adding new model const1.i_3.bplTransformedIcfg_BEv2_6.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 09:22:10 BoogieIcfgContainer [2018-09-23 21:22:10,682 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 21:22:10,683 INFO L168 Benchmark]: Toolchain (without parser) took 233233.73 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -127.9 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 450.1 MB). Peak memory consumption was 322.2 MB. Max. memory is 7.1 GB. [2018-09-23 21:22:10,684 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:22:10,685 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.57 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:22:10,685 INFO L168 Benchmark]: Boogie Preprocessor took 22.01 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:22:10,685 INFO L168 Benchmark]: RCFGBuilder took 276.24 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 21:22:10,686 INFO L168 Benchmark]: TraceAbstraction took 232882.90 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -127.9 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 429.0 MB). Peak memory consumption was 301.1 MB. Max. memory is 7.1 GB. [2018-09-23 21:22:10,688 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.57 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.01 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 276.24 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 232882.90 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -127.9 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 429.0 MB). Peak memory consumption was 301.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 37]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 37). Cancelled while BasicCegarLoop was analyzing trace of length 116 with TraceHistMax 112, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 24 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 232.8s OverallTime, 113 OverallIterations, 112 TraceHistogramMax, 22.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 337 SDtfs, 0 SDslu, 4969 SDs, 0 SdLazy, 11408 SolverSat, 166 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12878 GetRequests, 6550 SyntacticMatches, 0 SemanticMatches, 6328 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 193.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=116occurred in iteration=112, 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, 112 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.0s SsaConstructionTime, 6.3s SatisfiabilityAnalysisTime, 197.2s InterpolantComputationTime, 13101 NumberOfCodeBlocks, 13101 NumberOfCodeBlocksAsserted, 1837 NumberOfCheckSat, 12878 ConstructedInterpolants, 0 QuantifiedInterpolants, 2898440 SizeOfPredicates, 111 NumberOfNonLiveVariables, 39294 ConjunctsInSsa, 6438 ConjunctsInUnsatCore, 223 InterpolantComputations, 1 PerfectInterpolantSequences, 0/468272 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/const1.i_3.bplTransformedIcfg_BEv2_6.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_21-22-10-696.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/const1.i_3.bplTransformedIcfg_BEv2_6.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_21-22-10-696.csv Completed graceful shutdown