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_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/simple4.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-10-01 00:56:33,944 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-01 00:56:33,946 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-01 00:56:33,958 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-01 00:56:33,989 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-01 00:56:34,011 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-01 00:56:34,011 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-01 00:56:34,012 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-01 00:56:34,013 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-01 00:56:34,013 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-01 00:56:34,013 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-01 00:56:34,014 INFO L133 SettingsManager]: * Use SBE=true [2018-10-01 00:56:34,014 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-01 00:56:34,014 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-01 00:56:34,014 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-01 00:56:34,014 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-01 00:56:34,015 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-01 00:56:34,015 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-01 00:56:34,015 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-01 00:56:34,015 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-01 00:56:34,017 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-01 00:56:34,017 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-01 00:56:34,017 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-01 00:56:34,017 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-01 00:56:34,018 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-01 00:56:34,019 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-01 00:56:34,019 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-01 00:56:34,019 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-01 00:56:34,019 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-01 00:56:34,019 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-01 00:56:34,019 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-01 00:56:34,020 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-01 00:56:34,020 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-01 00:56:34,020 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-01 00:56:34,020 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-01 00:56:34,021 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-01 00:56:34,072 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-01 00:56:34,086 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-01 00:56:34,091 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-01 00:56:34,093 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-01 00:56:34,093 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-01 00:56:34,094 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/simple4.i_3.bpl [2018-10-01 00:56:34,094 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/simple4.i_3.bpl' [2018-10-01 00:56:34,143 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-01 00:56:34,147 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-01 00:56:34,148 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-01 00:56:34,148 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-01 00:56:34,148 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-01 00:56:34,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:56:34" (1/1) ... [2018-10-01 00:56:34,182 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:56:34" (1/1) ... [2018-10-01 00:56:34,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-01 00:56:34,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-01 00:56:34,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-01 00:56:34,190 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-01 00:56:34,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:56:34" (1/1) ... [2018-10-01 00:56:34,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:56:34" (1/1) ... [2018-10-01 00:56:34,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:56:34" (1/1) ... [2018-10-01 00:56:34,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:56:34" (1/1) ... [2018-10-01 00:56:34,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:56:34" (1/1) ... [2018-10-01 00:56:34,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:56:34" (1/1) ... [2018-10-01 00:56:34,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:56:34" (1/1) ... [2018-10-01 00:56:34,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-01 00:56:34,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-01 00:56:34,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-01 00:56:34,211 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-01 00:56:34,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:56:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-01 00:56:34,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-01 00:56:34,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-01 00:56:34,512 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-01 00:56:34,513 INFO L202 PluginConnector]: Adding new model simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 12:56:34 BoogieIcfgContainer [2018-10-01 00:56:34,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-01 00:56:34,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-01 00:56:34,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-01 00:56:34,520 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-01 00:56:34,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:56:34" (1/2) ... [2018-10-01 00:56:34,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e7d95bd and model type simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 12:56:34, skipping insertion in model container [2018-10-01 00:56:34,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 12:56:34" (2/2) ... [2018-10-01 00:56:34,524 INFO L112 eAbstractionObserver]: Analyzing ICFG simple4.i_3.bpl [2018-10-01 00:56:34,541 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-01 00:56:34,554 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-01 00:56:34,600 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-01 00:56:34,601 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-01 00:56:34,601 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-01 00:56:34,602 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-01 00:56:34,602 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-01 00:56:34,602 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-01 00:56:34,602 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-01 00:56:34,602 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-01 00:56:34,603 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-01 00:56:34,618 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-01 00:56:34,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-01 00:56:34,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:34,626 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-01 00:56:34,628 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:34,634 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:34,635 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-01 00:56:34,637 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:34,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:34,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:34,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:56:34,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:34,836 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-01 00:56:34,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-01 00:56:34,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-01 00:56:34,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-01 00:56:34,853 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:34,855 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-01 00:56:34,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:34,968 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-01 00:56:34,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-01 00:56:34,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-01 00:56:34,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:34,985 INFO L225 Difference]: With dead ends: 11 [2018-10-01 00:56:34,985 INFO L226 Difference]: Without dead ends: 7 [2018-10-01 00:56:34,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-10-01 00:56:35,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-01 00:56:35,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-01 00:56:35,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-01 00:56:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-01 00:56:35,057 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-01 00:56:35,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:35,058 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-01 00:56:35,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-01 00:56:35,058 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-01 00:56:35,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-01 00:56:35,059 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:35,059 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-01 00:56:35,059 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:35,060 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:35,060 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-01 00:56:35,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:35,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:35,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:35,061 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:56:35,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:35,143 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:35,143 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:56:35,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:56:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:35,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:35,345 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:35,346 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-01 00:56:35,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-01 00:56:35,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-01 00:56:35,347 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:35,347 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-01 00:56:35,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:35,502 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-01 00:56:35,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-01 00:56:35,502 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-01 00:56:35,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:35,503 INFO L225 Difference]: With dead ends: 11 [2018-10-01 00:56:35,503 INFO L226 Difference]: Without dead ends: 9 [2018-10-01 00:56:35,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 00:56:35,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-01 00:56:35,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-01 00:56:35,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-01 00:56:35,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-01 00:56:35,508 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-01 00:56:35,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:35,509 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-01 00:56:35,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-01 00:56:35,509 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-01 00:56:35,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-01 00:56:35,509 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:35,510 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-01 00:56:35,510 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:35,510 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:35,511 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-01 00:56:35,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:35,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:35,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:35,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:56:35,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:35,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:35,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:56:35,630 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:56:35,652 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:56:35,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:35,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:35,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:35,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-01 00:56:35,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-01 00:56:35,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-01 00:56:35,775 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:35,775 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-01 00:56:36,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:36,107 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-01 00:56:36,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-01 00:56:36,107 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-01 00:56:36,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:36,108 INFO L225 Difference]: With dead ends: 13 [2018-10-01 00:56:36,108 INFO L226 Difference]: Without dead ends: 11 [2018-10-01 00:56:36,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 00:56:36,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-01 00:56:36,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-01 00:56:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-01 00:56:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-01 00:56:36,113 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-01 00:56:36,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:36,113 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-01 00:56:36,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-01 00:56:36,114 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-01 00:56:36,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-01 00:56:36,114 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:36,115 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-01 00:56:36,115 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:36,115 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:36,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-01 00:56:36,116 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:36,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:36,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:36,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:36,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:36,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:36,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:36,209 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:56:36,218 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:56:36,233 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-01 00:56:36,233 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:36,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:36,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:36,361 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:36,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-01 00:56:36,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-01 00:56:36,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-01 00:56:36,363 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:36,363 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-01 00:56:36,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:36,675 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-01 00:56:36,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 00:56:36,676 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-01 00:56:36,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:36,676 INFO L225 Difference]: With dead ends: 15 [2018-10-01 00:56:36,676 INFO L226 Difference]: Without dead ends: 13 [2018-10-01 00:56:36,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 00:56:36,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-01 00:56:36,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-01 00:56:36,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-01 00:56:36,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-01 00:56:36,681 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-01 00:56:36,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:36,681 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-01 00:56:36,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-01 00:56:36,682 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-01 00:56:36,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-01 00:56:36,682 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:36,682 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-01 00:56:36,683 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:36,683 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:36,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-01 00:56:36,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:36,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:36,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:36,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:36,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:36,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:36,784 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:36,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:56:36,798 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:56:36,809 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:56:36,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:36,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:36,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:36,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-01 00:56:36,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-01 00:56:36,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-01 00:56:36,936 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:36,936 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-01 00:56:37,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:37,627 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-01 00:56:37,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-01 00:56:37,628 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-01 00:56:37,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:37,628 INFO L225 Difference]: With dead ends: 17 [2018-10-01 00:56:37,629 INFO L226 Difference]: Without dead ends: 15 [2018-10-01 00:56:37,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 00:56:37,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-01 00:56:37,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-01 00:56:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-01 00:56:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-01 00:56:37,633 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-01 00:56:37,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:37,634 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-01 00:56:37,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-01 00:56:37,634 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-01 00:56:37,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-01 00:56:37,635 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:37,635 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-01 00:56:37,635 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:37,635 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:37,636 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-01 00:56:37,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:37,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:37,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:37,637 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:37,637 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:37,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:37,800 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:37,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:56:37,809 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:56:37,928 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-01 00:56:37,929 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:37,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:38,057 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:38,058 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-01 00:56:38,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 00:56:38,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 00:56:38,058 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:38,059 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-01 00:56:38,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:38,344 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-01 00:56:38,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 00:56:38,345 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-01 00:56:38,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:38,347 INFO L225 Difference]: With dead ends: 19 [2018-10-01 00:56:38,347 INFO L226 Difference]: Without dead ends: 17 [2018-10-01 00:56:38,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 00:56:38,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-01 00:56:38,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-01 00:56:38,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-01 00:56:38,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-01 00:56:38,351 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-01 00:56:38,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:38,352 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-01 00:56:38,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 00:56:38,352 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-01 00:56:38,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-01 00:56:38,353 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:38,353 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-01 00:56:38,353 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:38,354 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:38,354 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-01 00:56:38,354 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:38,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:38,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:38,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:38,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:38,577 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:38,577 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:56:38,591 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:56:38,613 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-01 00:56:38,614 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:38,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:38,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:38,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-01 00:56:38,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 00:56:38,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 00:56:38,748 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:38,749 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-01 00:56:39,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:39,014 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-01 00:56:39,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 00:56:39,017 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-01 00:56:39,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:39,018 INFO L225 Difference]: With dead ends: 21 [2018-10-01 00:56:39,018 INFO L226 Difference]: Without dead ends: 19 [2018-10-01 00:56:39,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 00:56:39,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-01 00:56:39,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-01 00:56:39,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-01 00:56:39,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-01 00:56:39,023 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-01 00:56:39,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:39,024 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-01 00:56:39,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 00:56:39,024 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-01 00:56:39,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-01 00:56:39,025 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:39,025 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-01 00:56:39,025 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:39,025 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:39,025 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-01 00:56:39,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:39,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:39,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:39,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:39,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:39,245 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:39,246 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:39,246 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:56:39,256 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:56:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:39,266 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:39,329 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:39,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:39,351 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-01 00:56:39,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 00:56:39,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 00:56:39,352 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:39,352 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-01 00:56:39,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:39,892 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-01 00:56:39,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 00:56:39,893 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-01 00:56:39,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:39,894 INFO L225 Difference]: With dead ends: 23 [2018-10-01 00:56:39,894 INFO L226 Difference]: Without dead ends: 21 [2018-10-01 00:56:39,895 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 00:56:39,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-01 00:56:39,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-01 00:56:39,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-01 00:56:39,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-01 00:56:39,899 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-01 00:56:39,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:39,900 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-01 00:56:39,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 00:56:39,900 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-01 00:56:39,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-01 00:56:39,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:39,901 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-01 00:56:39,901 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:39,901 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:39,902 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-01 00:56:39,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:39,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:39,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:39,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:56:39,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:40,107 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:40,107 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:56:40,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:56:40,124 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:56:40,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:40,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:40,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:40,302 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-01 00:56:40,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:56:40,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:56:40,302 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:40,303 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-01 00:56:40,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:40,690 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-01 00:56:40,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:56:40,690 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-01 00:56:40,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:40,692 INFO L225 Difference]: With dead ends: 25 [2018-10-01 00:56:40,692 INFO L226 Difference]: Without dead ends: 23 [2018-10-01 00:56:40,692 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 00:56:40,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-01 00:56:40,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-01 00:56:40,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-01 00:56:40,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-01 00:56:40,698 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-01 00:56:40,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:40,698 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-01 00:56:40,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:56:40,698 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-01 00:56:40,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-01 00:56:40,699 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:40,699 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-01 00:56:40,700 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:40,700 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:40,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-01 00:56:40,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:40,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:40,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:40,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:40,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:40,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:40,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:56:40,925 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:56:41,032 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-10-01 00:56:41,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:41,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:41,119 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:41,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-01 00:56:41,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:56:41,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:56:41,120 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:41,120 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-10-01 00:56:41,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:41,630 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-01 00:56:41,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:56:41,631 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-10-01 00:56:41,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:41,632 INFO L225 Difference]: With dead ends: 27 [2018-10-01 00:56:41,632 INFO L226 Difference]: Without dead ends: 25 [2018-10-01 00:56:41,632 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 00:56:41,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-01 00:56:41,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-01 00:56:41,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-01 00:56:41,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-01 00:56:41,638 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-10-01 00:56:41,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:41,639 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-01 00:56:41,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:56:41,639 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-01 00:56:41,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-01 00:56:41,640 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:41,640 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-10-01 00:56:41,640 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:41,640 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:41,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-10-01 00:56:41,640 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:41,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:41,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:41,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:41,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:41,806 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:41,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:56:41,816 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:56:41,838 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:56:41,839 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:41,841 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:41,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:41,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-01 00:56:41,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-01 00:56:41,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-01 00:56:41,994 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:41,994 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-10-01 00:56:42,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:42,938 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-01 00:56:42,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-01 00:56:42,939 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-10-01 00:56:42,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:42,940 INFO L225 Difference]: With dead ends: 29 [2018-10-01 00:56:42,940 INFO L226 Difference]: Without dead ends: 27 [2018-10-01 00:56:42,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 00:56:42,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-01 00:56:42,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-01 00:56:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-01 00:56:42,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-01 00:56:42,947 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-10-01 00:56:42,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:42,947 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-01 00:56:42,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-01 00:56:42,948 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-01 00:56:42,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-01 00:56:42,948 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:42,949 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-10-01 00:56:42,949 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:42,949 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:42,949 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-10-01 00:56:42,949 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:42,949 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:42,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:42,950 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:42,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:43,125 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:43,125 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:56:43,132 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:58:08,419 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-01 00:58:08,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:08,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:08,729 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:08,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-01 00:58:08,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-01 00:58:08,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-01 00:58:08,731 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:08,731 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-10-01 00:58:09,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:09,324 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-01 00:58:09,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-01 00:58:09,327 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-10-01 00:58:09,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:09,327 INFO L225 Difference]: With dead ends: 31 [2018-10-01 00:58:09,327 INFO L226 Difference]: Without dead ends: 29 [2018-10-01 00:58:09,327 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 00:58:09,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-01 00:58:09,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-01 00:58:09,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-01 00:58:09,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-01 00:58:09,332 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-10-01 00:58:09,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:09,333 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-01 00:58:09,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-01 00:58:09,333 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-01 00:58:09,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-01 00:58:09,333 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:09,334 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-10-01 00:58:09,334 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:09,334 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:09,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-10-01 00:58:09,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:09,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:09,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:09,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:09,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:09,539 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:09,540 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:09,547 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:58:10,209 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-01 00:58:10,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:10,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:10,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:10,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-01 00:58:10,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-01 00:58:10,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-01 00:58:10,626 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:10,626 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-10-01 00:58:11,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:11,354 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-01 00:58:11,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-01 00:58:11,355 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-10-01 00:58:11,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:11,355 INFO L225 Difference]: With dead ends: 33 [2018-10-01 00:58:11,355 INFO L226 Difference]: Without dead ends: 31 [2018-10-01 00:58:11,356 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 00:58:11,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-01 00:58:11,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-01 00:58:11,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-01 00:58:11,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-01 00:58:11,361 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-10-01 00:58:11,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:11,362 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-01 00:58:11,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-01 00:58:11,362 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-01 00:58:11,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-01 00:58:11,362 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:11,363 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-10-01 00:58:11,363 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:11,363 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:11,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-10-01 00:58:11,363 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:11,363 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:11,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:11,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:11,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:11,713 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:11,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:11,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:58:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:11,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:11,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:11,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-01 00:58:11,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-01 00:58:11,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-01 00:58:11,952 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:11,952 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-10-01 00:58:12,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:12,900 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-01 00:58:12,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-01 00:58:12,901 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-10-01 00:58:12,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:12,902 INFO L225 Difference]: With dead ends: 35 [2018-10-01 00:58:12,902 INFO L226 Difference]: Without dead ends: 33 [2018-10-01 00:58:12,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:58:12,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-01 00:58:12,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-01 00:58:12,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-01 00:58:12,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-01 00:58:12,909 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-10-01 00:58:12,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:12,909 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-01 00:58:12,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-01 00:58:12,909 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-01 00:58:12,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-01 00:58:12,910 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:12,910 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-10-01 00:58:12,911 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:12,911 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:12,911 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-10-01 00:58:12,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:12,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:12,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:12,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:58:12,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:13,146 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:13,147 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:13,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:13,171 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:58:13,185 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:58:13,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:13,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:13,711 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:13,711 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-01 00:58:13,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-01 00:58:13,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-01 00:58:13,712 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:13,712 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-10-01 00:58:14,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:14,640 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-01 00:58:14,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-01 00:58:14,641 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-10-01 00:58:14,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:14,642 INFO L225 Difference]: With dead ends: 37 [2018-10-01 00:58:14,642 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 00:58:14,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 00:58:14,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 00:58:14,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-01 00:58:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-01 00:58:14,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-01 00:58:14,648 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-10-01 00:58:14,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:14,648 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-01 00:58:14,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-01 00:58:14,648 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-01 00:58:14,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-01 00:58:14,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:14,649 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-10-01 00:58:14,649 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:14,649 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:14,650 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-10-01 00:58:14,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:14,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:14,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:14,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:14,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:15,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:15,031 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:15,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:58:16,211 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-10-01 00:58:16,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:16,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:16,324 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:16,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-01 00:58:16,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-01 00:58:16,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-01 00:58:16,324 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:16,325 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-10-01 00:58:17,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:17,362 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-01 00:58:17,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-01 00:58:17,365 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-10-01 00:58:17,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:17,366 INFO L225 Difference]: With dead ends: 39 [2018-10-01 00:58:17,366 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 00:58:17,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:58:17,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 00:58:17,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-01 00:58:17,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-01 00:58:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-01 00:58:17,372 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-10-01 00:58:17,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:17,372 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-01 00:58:17,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-01 00:58:17,373 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-01 00:58:17,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-01 00:58:17,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:17,373 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-10-01 00:58:17,374 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:17,374 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:17,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-10-01 00:58:17,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:17,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:17,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:17,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:17,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:17,681 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:17,681 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:17,690 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:58:17,717 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:58:17,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:17,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:17,842 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:17,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-01 00:58:17,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-01 00:58:17,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-01 00:58:17,843 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:17,843 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-10-01 00:58:18,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:18,970 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-01 00:58:18,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-01 00:58:18,970 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-10-01 00:58:18,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:18,971 INFO L225 Difference]: With dead ends: 41 [2018-10-01 00:58:18,971 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 00:58:18,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 00:58:18,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 00:58:18,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-01 00:58:18,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-01 00:58:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-01 00:58:18,978 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-10-01 00:58:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:18,978 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-01 00:58:18,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-01 00:58:18,978 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-01 00:58:18,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-01 00:58:18,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:18,979 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-10-01 00:58:18,979 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:18,979 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:18,979 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-10-01 00:58:18,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:18,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:18,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:18,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:18,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:19,424 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:19,424 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:19,432 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:01:21,261 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-10-01 01:01:21,262 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:01:21,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:01:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:21,852 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:01:21,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-01 01:01:21,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-01 01:01:21,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-01 01:01:21,853 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:01:21,853 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-10-01 01:01:23,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:01:23,161 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-01 01:01:23,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-01 01:01:23,162 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-10-01 01:01:23,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:01:23,162 INFO L225 Difference]: With dead ends: 43 [2018-10-01 01:01:23,162 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 01:01:23,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:01:23,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 01:01:23,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-01 01:01:23,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-01 01:01:23,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-01 01:01:23,168 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-10-01 01:01:23,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:01:23,169 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-01 01:01:23,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-01 01:01:23,169 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-01 01:01:23,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-01 01:01:23,170 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:01:23,170 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-10-01 01:01:23,172 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:01:23,173 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:01:23,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-10-01 01:01:23,173 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:01:23,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:01:23,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:23,174 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:01:23,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:23,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:01:23,499 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:23,499 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:01:23,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:01:23,506 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:02:03,967 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-01 01:02:03,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:02:04,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:02:04,335 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:04,356 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:02:04,356 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-01 01:02:04,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-01 01:02:04,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-01 01:02:04,357 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:02:04,357 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-10-01 01:02:06,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:02:06,144 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-01 01:02:06,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-01 01:02:06,145 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-10-01 01:02:06,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:02:06,145 INFO L225 Difference]: With dead ends: 45 [2018-10-01 01:02:06,145 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 01:02:06,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:02:06,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 01:02:06,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-01 01:02:06,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-01 01:02:06,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-01 01:02:06,149 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-10-01 01:02:06,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:02:06,149 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-01 01:02:06,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-01 01:02:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-01 01:02:06,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-01 01:02:06,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:02:06,150 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-10-01 01:02:06,150 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:02:06,151 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:02:06,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-10-01 01:02:06,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:02:06,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:02:06,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:06,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:02:06,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:07,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:02:07,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:02:07,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:02:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:07,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:02:07,148 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:07,168 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:02:07,169 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-01 01:02:07,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-01 01:02:07,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-01 01:02:07,169 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:02:07,169 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-10-01 01:02:08,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:02:08,718 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-01 01:02:08,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-01 01:02:08,719 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-10-01 01:02:08,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:02:08,719 INFO L225 Difference]: With dead ends: 47 [2018-10-01 01:02:08,719 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 01:02:08,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-10-01 01:02:08,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 01:02:08,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-01 01:02:08,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-01 01:02:08,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-01 01:02:08,726 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-10-01 01:02:08,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:02:08,729 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-01 01:02:08,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-01 01:02:08,729 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-01 01:02:08,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-01 01:02:08,730 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:02:08,730 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-10-01 01:02:08,730 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:02:08,730 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:02:08,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-10-01 01:02:08,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:02:08,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:02:08,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:08,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:02:08,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:09,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:02:09,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:02:09,166 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:02:09,182 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:02:09,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:02:09,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:02:09,287 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:09,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:02:09,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-01 01:02:09,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-01 01:02:09,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-01 01:02:09,309 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:02:09,310 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-10-01 01:02:11,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:02:11,048 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-01 01:02:11,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-01 01:02:11,049 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-10-01 01:02:11,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:02:11,049 INFO L225 Difference]: With dead ends: 49 [2018-10-01 01:02:11,049 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 01:02:11,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 01:02:11,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 01:02:11,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-01 01:02:11,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-01 01:02:11,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-01 01:02:11,056 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-10-01 01:02:11,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:02:11,056 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-01 01:02:11,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-01 01:02:11,056 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-01 01:02:11,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-01 01:02:11,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:02:11,057 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-10-01 01:02:11,057 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:02:11,057 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:02:11,057 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-10-01 01:02:11,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:02:11,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:02:11,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:11,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:02:11,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:11,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:02:11,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:02:11,749 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:02:55,984 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-01 01:02:55,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:02:55,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:02:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:56,127 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:02:56,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-01 01:02:56,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-01 01:02:56,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-01 01:02:56,128 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:02:56,128 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-10-01 01:02:58,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:02:58,048 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-01 01:02:58,050 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-01 01:02:58,050 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-10-01 01:02:58,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:02:58,051 INFO L225 Difference]: With dead ends: 51 [2018-10-01 01:02:58,051 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 01:02:58,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-10-01 01:02:58,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 01:02:58,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-01 01:02:58,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-01 01:02:58,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-01 01:02:58,057 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-10-01 01:02:58,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:02:58,057 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-01 01:02:58,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-01 01:02:58,057 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-01 01:02:58,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-01 01:02:58,058 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:02:58,058 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-10-01 01:02:58,058 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:02:58,058 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:02:58,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-10-01 01:02:58,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:02:58,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:02:58,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:58,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:02:58,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:58,495 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:58,495 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:02:58,495 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:02:58,503 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:02:58,521 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:02:58,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:02:58,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:02:58,643 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:58,665 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:02:58,665 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-01 01:02:58,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-01 01:02:58,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-01 01:02:58,666 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:02:58,666 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-10-01 01:03:00,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:03:00,596 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-01 01:03:00,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-01 01:03:00,597 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-10-01 01:03:00,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:03:00,597 INFO L225 Difference]: With dead ends: 53 [2018-10-01 01:03:00,598 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 01:03:00,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 01:03:00,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 01:03:00,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-01 01:03:00,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-01 01:03:00,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-01 01:03:00,604 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-10-01 01:03:00,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:03:00,604 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-01 01:03:00,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-01 01:03:00,604 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-01 01:03:00,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-01 01:03:00,605 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:03:00,605 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-10-01 01:03:00,605 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:03:00,605 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:03:00,605 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-10-01 01:03:00,606 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:03:00,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:03:00,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:00,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:03:00,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:03:01,289 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:01,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:03:01,289 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:03:01,296 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:07:41,969 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-10-01 01:07:41,969 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:07:48,679 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:07:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:07:48,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:07:48,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-01 01:07:48,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-01 01:07:48,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-01 01:07:48,937 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:07:48,937 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-10-01 01:07:51,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:07:51,058 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-01 01:07:51,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-01 01:07:51,059 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-10-01 01:07:51,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:07:51,060 INFO L225 Difference]: With dead ends: 55 [2018-10-01 01:07:51,060 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 01:07:51,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-10-01 01:07:51,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 01:07:51,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-01 01:07:51,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-01 01:07:51,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-01 01:07:51,066 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-10-01 01:07:51,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:07:51,066 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-01 01:07:51,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-01 01:07:51,066 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-01 01:07:51,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-01 01:07:51,066 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:07:51,067 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-10-01 01:07:51,067 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:07:51,067 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:07:51,067 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-10-01 01:07:51,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:07:51,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:07:51,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:07:51,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:07:51,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:07:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:07:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:07:51,668 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:07:51,668 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:07:51,677 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown