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/seq.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-10-01 00:56:26,030 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-01 00:56:26,032 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-01 00:56:26,044 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-01 00:56:26,081 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 00:56:26,097 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-01 00:56:26,097 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-01 00:56:26,098 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-01 00:56:26,098 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-01 00:56:26,098 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-01 00:56:26,099 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-01 00:56:26,099 INFO L133 SettingsManager]: * Use SBE=true [2018-10-01 00:56:26,099 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-01 00:56:26,099 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-01 00:56:26,099 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-01 00:56:26,100 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-01 00:56:26,100 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-01 00:56:26,100 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-01 00:56:26,100 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-01 00:56:26,100 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-01 00:56:26,101 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-01 00:56:26,101 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-01 00:56:26,101 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-01 00:56:26,101 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-01 00:56:26,101 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-01 00:56:26,101 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-01 00:56:26,102 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-01 00:56:26,102 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-01 00:56:26,102 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-01 00:56:26,102 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-01 00:56:26,102 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-01 00:56:26,103 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-01 00:56:26,103 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-01 00:56:26,103 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-01 00:56:26,103 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-01 00:56:26,103 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-01 00:56:26,158 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-01 00:56:26,171 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-01 00:56:26,174 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-01 00:56:26,176 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-01 00:56:26,176 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-01 00:56:26,177 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/seq.i_4.bpl [2018-10-01 00:56:26,178 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/seq.i_4.bpl' [2018-10-01 00:56:26,233 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-01 00:56:26,237 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-01 00:56:26,238 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-01 00:56:26,238 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-01 00:56:26,238 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-01 00:56:26,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:56:26" (1/1) ... [2018-10-01 00:56:26,271 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:56:26" (1/1) ... [2018-10-01 00:56:26,278 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-01 00:56:26,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-01 00:56:26,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-01 00:56:26,279 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-01 00:56:26,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:56:26" (1/1) ... [2018-10-01 00:56:26,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:56:26" (1/1) ... [2018-10-01 00:56:26,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:56:26" (1/1) ... [2018-10-01 00:56:26,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:56:26" (1/1) ... [2018-10-01 00:56:26,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:56:26" (1/1) ... [2018-10-01 00:56:26,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:56:26" (1/1) ... [2018-10-01 00:56:26,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:56:26" (1/1) ... [2018-10-01 00:56:26,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-01 00:56:26,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-01 00:56:26,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-01 00:56:26,305 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-01 00:56:26,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:56:26" (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 00:56:26,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-01 00:56:26,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-01 00:56:26,697 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-01 00:56:26,698 INFO L202 PluginConnector]: Adding new model seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 12:56:26 BoogieIcfgContainer [2018-10-01 00:56:26,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-01 00:56:26,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-01 00:56:26,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-01 00:56:26,704 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-01 00:56:26,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.10 12:56:26" (1/2) ... [2018-10-01 00:56:26,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535c96d7 and model type seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.10 12:56:26, skipping insertion in model container [2018-10-01 00:56:26,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.10 12:56:26" (2/2) ... [2018-10-01 00:56:26,709 INFO L112 eAbstractionObserver]: Analyzing ICFG seq.i_4.bpl [2018-10-01 00:56:26,719 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-01 00:56:26,730 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-01 00:56:26,776 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-01 00:56:26,777 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-01 00:56:26,777 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-01 00:56:26,777 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-01 00:56:26,777 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-01 00:56:26,778 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-01 00:56:26,778 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-01 00:56:26,778 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-01 00:56:26,778 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-01 00:56:26,794 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-01 00:56:26,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-01 00:56:26,801 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:26,802 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-01 00:56:26,803 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:26,810 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:26,811 INFO L82 PathProgramCache]: Analyzing trace with hash 889539531, now seen corresponding path program 1 times [2018-10-01 00:56:26,813 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:26,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:26,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:26,861 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:56:26,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:27,102 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 00:56:27,104 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-01 00:56:27,105 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-01 00:56:27,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-01 00:56:27,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-01 00:56:27,124 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:27,126 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-10-01 00:56:27,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:27,353 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2018-10-01 00:56:27,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-01 00:56:27,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-01 00:56:27,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:27,368 INFO L225 Difference]: With dead ends: 16 [2018-10-01 00:56:27,368 INFO L226 Difference]: Without dead ends: 9 [2018-10-01 00:56:27,371 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 00:56:27,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-01 00:56:27,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-01 00:56:27,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-01 00:56:27,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-01 00:56:27,407 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-10-01 00:56:27,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:27,407 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-01 00:56:27,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-01 00:56:27,407 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-01 00:56:27,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-01 00:56:27,408 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:27,408 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-01 00:56:27,408 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:27,408 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:27,409 INFO L82 PathProgramCache]: Analyzing trace with hash 198621957, now seen corresponding path program 1 times [2018-10-01 00:56:27,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:27,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:27,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:27,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:56:27,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:27,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:27,491 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-01 00:56:27,491 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-01 00:56:27,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-01 00:56:27,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-01 00:56:27,494 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:27,494 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-10-01 00:56:27,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:27,984 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2018-10-01 00:56:27,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 00:56:27,984 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-01 00:56:27,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:27,985 INFO L225 Difference]: With dead ends: 17 [2018-10-01 00:56:27,985 INFO L226 Difference]: Without dead ends: 15 [2018-10-01 00:56:27,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 00:56:27,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-01 00:56:27,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 11. [2018-10-01 00:56:27,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-01 00:56:27,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-01 00:56:27,990 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-01 00:56:27,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:27,991 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-01 00:56:27,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-01 00:56:27,991 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-01 00:56:27,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-01 00:56:27,991 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:27,992 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-01 00:56:27,992 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:27,992 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:27,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1897191999, now seen corresponding path program 1 times [2018-10-01 00:56:27,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:27,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:27,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:27,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:56:27,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:28,105 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:28,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:56:28,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:56:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:28,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:28,425 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:28,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2018-10-01 00:56:28,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 00:56:28,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 00:56:28,426 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:28,427 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 10 states. [2018-10-01 00:56:29,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:29,210 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2018-10-01 00:56:29,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-01 00:56:29,212 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-01 00:56:29,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:29,213 INFO L225 Difference]: With dead ends: 20 [2018-10-01 00:56:29,213 INFO L226 Difference]: Without dead ends: 13 [2018-10-01 00:56:29,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 00:56:29,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-01 00:56:29,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-01 00:56:29,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-01 00:56:29,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-01 00:56:29,218 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-10-01 00:56:29,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:29,219 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-01 00:56:29,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 00:56:29,219 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-01 00:56:29,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-01 00:56:29,220 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:29,220 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-10-01 00:56:29,221 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:29,221 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:29,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1765270407, now seen corresponding path program 2 times [2018-10-01 00:56:29,221 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:29,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:29,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:29,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:56:29,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:29,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:29,362 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 00:56:29,380 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:56:29,404 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:56:29,404 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:29,406 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:29,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:29,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2018-10-01 00:56:29,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-01 00:56:29,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-01 00:56:29,556 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:29,556 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-10-01 00:56:29,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:29,796 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-10-01 00:56:29,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-01 00:56:29,797 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-10-01 00:56:29,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:29,798 INFO L225 Difference]: With dead ends: 21 [2018-10-01 00:56:29,798 INFO L226 Difference]: Without dead ends: 19 [2018-10-01 00:56:29,799 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 00:56:29,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-01 00:56:29,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-10-01 00:56:29,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-01 00:56:29,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-10-01 00:56:29,804 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2018-10-01 00:56:29,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:29,804 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-10-01 00:56:29,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-01 00:56:29,805 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-10-01 00:56:29,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-01 00:56:29,805 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:29,806 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2018-10-01 00:56:29,806 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:29,806 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:29,806 INFO L82 PathProgramCache]: Analyzing trace with hash 87273139, now seen corresponding path program 3 times [2018-10-01 00:56:29,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:29,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:29,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:29,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:29,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:29,915 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:29,916 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 00:56:29,925 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:56:29,940 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-01 00:56:29,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:29,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:30,291 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:30,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-10-01 00:56:30,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-01 00:56:30,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-01 00:56:30,293 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:30,293 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 14 states. [2018-10-01 00:56:30,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:30,670 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2018-10-01 00:56:30,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-01 00:56:30,671 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-01 00:56:30,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:30,672 INFO L225 Difference]: With dead ends: 26 [2018-10-01 00:56:30,672 INFO L226 Difference]: Without dead ends: 17 [2018-10-01 00:56:30,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:56:30,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-01 00:56:30,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-01 00:56:30,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-01 00:56:30,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-10-01 00:56:30,683 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2018-10-01 00:56:30,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:30,683 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-10-01 00:56:30,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-01 00:56:30,684 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-10-01 00:56:30,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-01 00:56:30,684 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:30,684 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1] [2018-10-01 00:56:30,685 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:30,685 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:30,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1096334355, now seen corresponding path program 4 times [2018-10-01 00:56:30,685 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:30,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:30,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:30,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:30,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:30,806 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:30,807 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:30,807 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:56:30,822 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:56:30,836 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:56:30,836 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:30,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:30,937 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:30,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2018-10-01 00:56:30,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-01 00:56:30,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-01 00:56:30,938 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:30,938 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2018-10-01 00:56:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:31,171 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-01 00:56:31,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-01 00:56:31,172 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-01 00:56:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:31,173 INFO L225 Difference]: With dead ends: 25 [2018-10-01 00:56:31,173 INFO L226 Difference]: Without dead ends: 23 [2018-10-01 00:56:31,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-10-01 00:56:31,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-01 00:56:31,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-01 00:56:31,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-01 00:56:31,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-01 00:56:31,179 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2018-10-01 00:56:31,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:31,179 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-01 00:56:31,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-01 00:56:31,180 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-01 00:56:31,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-01 00:56:31,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:31,181 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2018-10-01 00:56:31,181 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:31,181 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:31,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1310275289, now seen corresponding path program 5 times [2018-10-01 00:56:31,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:31,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:31,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:31,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:31,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:31,298 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:31,298 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 00:56:31,312 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:56:31,345 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-01 00:56:31,345 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:31,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:31,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:31,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-10-01 00:56:31,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-01 00:56:31,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-01 00:56:31,497 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:31,498 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 18 states. [2018-10-01 00:56:32,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:32,075 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-10-01 00:56:32,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-01 00:56:32,075 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-01 00:56:32,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:32,076 INFO L225 Difference]: With dead ends: 32 [2018-10-01 00:56:32,076 INFO L226 Difference]: Without dead ends: 21 [2018-10-01 00:56:32,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 00:56:32,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-01 00:56:32,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-01 00:56:32,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-01 00:56:32,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-01 00:56:32,082 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2018-10-01 00:56:32,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:32,083 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-01 00:56:32,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-01 00:56:32,083 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-01 00:56:32,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-01 00:56:32,084 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:32,084 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1] [2018-10-01 00:56:32,084 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:32,085 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:32,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1330040479, now seen corresponding path program 6 times [2018-10-01 00:56:32,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:32,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:32,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:32,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:32,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:32,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:32,209 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:56:32,220 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:56:32,238 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-01 00:56:32,238 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:32,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:32,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:32,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2018-10-01 00:56:32,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-01 00:56:32,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-01 00:56:32,375 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:32,375 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2018-10-01 00:56:32,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:32,746 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-01 00:56:32,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-01 00:56:32,748 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2018-10-01 00:56:32,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:32,749 INFO L225 Difference]: With dead ends: 29 [2018-10-01 00:56:32,749 INFO L226 Difference]: Without dead ends: 27 [2018-10-01 00:56:32,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 00:56:32,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-01 00:56:32,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2018-10-01 00:56:32,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-01 00:56:32,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-10-01 00:56:32,755 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2018-10-01 00:56:32,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:32,756 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-10-01 00:56:32,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-01 00:56:32,756 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-10-01 00:56:32,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-01 00:56:32,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:32,757 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1] [2018-10-01 00:56:32,757 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:32,757 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:32,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1731406235, now seen corresponding path program 7 times [2018-10-01 00:56:32,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:32,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:32,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:32,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:32,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:32,905 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:32,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:56:32,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:56:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:32,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:33,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:33,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-10-01 00:56:33,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-01 00:56:33,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-01 00:56:33,285 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:33,285 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 22 states. [2018-10-01 00:56:34,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:34,028 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2018-10-01 00:56:34,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-01 00:56:34,028 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-01 00:56:34,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:34,029 INFO L225 Difference]: With dead ends: 38 [2018-10-01 00:56:34,029 INFO L226 Difference]: Without dead ends: 25 [2018-10-01 00:56:34,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:56:34,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-01 00:56:34,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-01 00:56:34,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-01 00:56:34,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-01 00:56:34,035 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2018-10-01 00:56:34,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:34,035 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-01 00:56:34,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-01 00:56:34,036 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-01 00:56:34,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-01 00:56:34,036 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:34,036 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1] [2018-10-01 00:56:34,037 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:34,037 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:34,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1774380245, now seen corresponding path program 8 times [2018-10-01 00:56:34,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:34,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:34,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:34,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:56:34,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:34,219 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:34,219 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:34,220 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 00:56:34,236 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:56:34,279 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:56:34,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:34,282 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:34,428 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:34,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2018-10-01 00:56:34,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-01 00:56:34,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-01 00:56:34,430 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:34,430 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2018-10-01 00:56:34,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:34,772 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2018-10-01 00:56:34,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-01 00:56:34,773 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2018-10-01 00:56:34,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:34,773 INFO L225 Difference]: With dead ends: 33 [2018-10-01 00:56:34,774 INFO L226 Difference]: Without dead ends: 31 [2018-10-01 00:56:34,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 00:56:34,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-01 00:56:34,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-10-01 00:56:34,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-01 00:56:34,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-10-01 00:56:34,779 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2018-10-01 00:56:34,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:34,779 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-10-01 00:56:34,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-01 00:56:34,780 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2018-10-01 00:56:34,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-01 00:56:34,780 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:34,780 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1] [2018-10-01 00:56:34,781 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:34,781 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:34,781 INFO L82 PathProgramCache]: Analyzing trace with hash 77451279, now seen corresponding path program 9 times [2018-10-01 00:56:34,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:34,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:34,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:34,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:34,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:34,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:35,324 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:35,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:56:35,333 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:56:35,355 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-01 00:56:35,355 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:35,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:35,852 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:35,884 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:35,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2018-10-01 00:56:35,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-01 00:56:35,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-01 00:56:35,886 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:35,886 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 26 states. [2018-10-01 00:56:36,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:36,531 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2018-10-01 00:56:36,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-01 00:56:36,531 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-01 00:56:36,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:36,532 INFO L225 Difference]: With dead ends: 44 [2018-10-01 00:56:36,532 INFO L226 Difference]: Without dead ends: 29 [2018-10-01 00:56:36,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-10-01 00:56:36,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-01 00:56:36,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-01 00:56:36,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-01 00:56:36,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-10-01 00:56:36,538 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2018-10-01 00:56:36,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:36,538 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-10-01 00:56:36,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-01 00:56:36,538 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-10-01 00:56:36,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-01 00:56:36,539 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:36,539 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1] [2018-10-01 00:56:36,540 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:36,540 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:36,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1980325449, now seen corresponding path program 10 times [2018-10-01 00:56:36,540 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:36,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:36,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:36,541 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:36,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:36,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:36,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:36,688 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 00:56:36,697 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:56:36,719 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:56:36,719 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:36,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 42 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:36,938 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:36,938 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2018-10-01 00:56:36,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-01 00:56:36,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-01 00:56:36,939 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:36,939 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-10-01 00:56:37,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:37,315 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2018-10-01 00:56:37,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-01 00:56:37,316 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-10-01 00:56:37,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:37,317 INFO L225 Difference]: With dead ends: 37 [2018-10-01 00:56:37,317 INFO L226 Difference]: Without dead ends: 35 [2018-10-01 00:56:37,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 00:56:37,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-01 00:56:37,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2018-10-01 00:56:37,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-01 00:56:37,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-10-01 00:56:37,325 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2018-10-01 00:56:37,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:37,325 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-10-01 00:56:37,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-01 00:56:37,325 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-10-01 00:56:37,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-01 00:56:37,326 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:37,326 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1] [2018-10-01 00:56:37,326 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:37,327 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:37,327 INFO L82 PathProgramCache]: Analyzing trace with hash 422296707, now seen corresponding path program 11 times [2018-10-01 00:56:37,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:37,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:37,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:37,328 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:37,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:37,540 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:37,540 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:56:37,547 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:56:37,598 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-01 00:56:37,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:37,601 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:37,974 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:37,995 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:37,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2018-10-01 00:56:37,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-01 00:56:37,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-01 00:56:37,996 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:37,996 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 30 states. [2018-10-01 00:56:39,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:39,240 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2018-10-01 00:56:39,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-01 00:56:39,240 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-01 00:56:39,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:39,241 INFO L225 Difference]: With dead ends: 50 [2018-10-01 00:56:39,241 INFO L226 Difference]: Without dead ends: 33 [2018-10-01 00:56:39,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-10-01 00:56:39,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-01 00:56:39,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-01 00:56:39,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-01 00:56:39,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2018-10-01 00:56:39,247 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2018-10-01 00:56:39,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:39,247 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2018-10-01 00:56:39,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-01 00:56:39,247 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2018-10-01 00:56:39,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-01 00:56:39,248 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:39,248 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 1, 1, 1, 1] [2018-10-01 00:56:39,249 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:39,249 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:39,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1320051267, now seen corresponding path program 12 times [2018-10-01 00:56:39,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:39,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:39,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:39,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:39,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:39,366 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:39,366 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 00:56:39,375 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:56:39,405 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-10-01 00:56:39,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:39,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 56 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:39,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:39,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2018-10-01 00:56:39,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-01 00:56:39,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-01 00:56:39,570 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:39,570 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2018-10-01 00:56:39,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:39,946 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2018-10-01 00:56:39,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-01 00:56:39,947 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2018-10-01 00:56:39,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:39,948 INFO L225 Difference]: With dead ends: 41 [2018-10-01 00:56:39,948 INFO L226 Difference]: Without dead ends: 39 [2018-10-01 00:56:39,949 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-10-01 00:56:39,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-01 00:56:39,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-10-01 00:56:39,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-01 00:56:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2018-10-01 00:56:39,955 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2018-10-01 00:56:39,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:39,956 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2018-10-01 00:56:39,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-01 00:56:39,956 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2018-10-01 00:56:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-01 00:56:39,956 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:39,957 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1] [2018-10-01 00:56:39,957 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:39,957 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:39,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1553862921, now seen corresponding path program 13 times [2018-10-01 00:56:39,957 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:39,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:39,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:39,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:39,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:40,186 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:40,186 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:40,186 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 00:56:40,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:56:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:40,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 56 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:40,461 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:40,462 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 33 [2018-10-01 00:56:40,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-01 00:56:40,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-01 00:56:40,462 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:40,462 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 34 states. [2018-10-01 00:56:41,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:41,544 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2018-10-01 00:56:41,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-01 00:56:41,545 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-01 00:56:41,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:41,545 INFO L225 Difference]: With dead ends: 56 [2018-10-01 00:56:41,546 INFO L226 Difference]: Without dead ends: 37 [2018-10-01 00:56:41,546 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 00:56:41,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-01 00:56:41,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-01 00:56:41,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-01 00:56:41,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2018-10-01 00:56:41,552 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2018-10-01 00:56:41,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:41,553 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2018-10-01 00:56:41,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-01 00:56:41,553 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2018-10-01 00:56:41,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-01 00:56:41,553 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:41,554 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 1, 1, 1, 1] [2018-10-01 00:56:41,554 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:41,554 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:41,554 INFO L82 PathProgramCache]: Analyzing trace with hash 115385137, now seen corresponding path program 14 times [2018-10-01 00:56:41,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:41,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:41,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:41,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:56:41,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:41,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:41,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:56:41,737 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:56:41,764 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:56:41,765 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:41,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:41,906 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:41,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2018-10-01 00:56:41,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-01 00:56:41,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-01 00:56:41,907 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:41,907 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2018-10-01 00:56:42,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:42,639 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2018-10-01 00:56:42,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-01 00:56:42,640 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2018-10-01 00:56:42,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:42,640 INFO L225 Difference]: With dead ends: 45 [2018-10-01 00:56:42,640 INFO L226 Difference]: Without dead ends: 43 [2018-10-01 00:56:42,641 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:56:42,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-01 00:56:42,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2018-10-01 00:56:42,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-01 00:56:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2018-10-01 00:56:42,649 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2018-10-01 00:56:42,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:42,649 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2018-10-01 00:56:42,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-01 00:56:42,649 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2018-10-01 00:56:42,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-01 00:56:42,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:42,650 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1] [2018-10-01 00:56:42,650 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:42,650 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:42,651 INFO L82 PathProgramCache]: Analyzing trace with hash -783980693, now seen corresponding path program 15 times [2018-10-01 00:56:42,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:42,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:42,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:42,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:42,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:42,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:42,896 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:42,896 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 00:56:42,909 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:56:42,963 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-01 00:56:42,963 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:42,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:43,416 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:43,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:43,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2018-10-01 00:56:43,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-01 00:56:43,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-01 00:56:43,438 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:43,439 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 38 states. [2018-10-01 00:56:44,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:44,654 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2018-10-01 00:56:44,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-01 00:56:44,655 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-01 00:56:44,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:44,655 INFO L225 Difference]: With dead ends: 62 [2018-10-01 00:56:44,655 INFO L226 Difference]: Without dead ends: 41 [2018-10-01 00:56:44,656 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-10-01 00:56:44,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-01 00:56:44,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-01 00:56:44,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-01 00:56:44,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2018-10-01 00:56:44,662 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2018-10-01 00:56:44,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:44,662 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2018-10-01 00:56:44,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-01 00:56:44,662 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2018-10-01 00:56:44,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-01 00:56:44,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:44,663 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 1, 1, 1, 1] [2018-10-01 00:56:44,663 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:44,663 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:44,664 INFO L82 PathProgramCache]: Analyzing trace with hash 830172837, now seen corresponding path program 16 times [2018-10-01 00:56:44,664 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:44,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:44,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:44,665 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:44,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:45,148 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:45,148 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:56:45,155 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:56:45,181 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:56:45,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:45,184 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 90 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:45,281 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:45,282 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2018-10-01 00:56:45,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-01 00:56:45,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-01 00:56:45,282 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:45,282 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2018-10-01 00:56:45,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:45,737 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2018-10-01 00:56:45,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-01 00:56:45,738 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2018-10-01 00:56:45,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:45,739 INFO L225 Difference]: With dead ends: 49 [2018-10-01 00:56:45,740 INFO L226 Difference]: Without dead ends: 47 [2018-10-01 00:56:45,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 00:56:45,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-01 00:56:45,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2018-10-01 00:56:45,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-01 00:56:45,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2018-10-01 00:56:45,749 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2018-10-01 00:56:45,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:45,749 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2018-10-01 00:56:45,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-01 00:56:45,749 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2018-10-01 00:56:45,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-01 00:56:45,750 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:45,750 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1] [2018-10-01 00:56:45,751 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:45,751 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:45,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1067768353, now seen corresponding path program 17 times [2018-10-01 00:56:45,751 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:45,751 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:45,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:45,752 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:45,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:47,241 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:47,241 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 00:56:47,261 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:56:47,291 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-01 00:56:47,291 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:47,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 90 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:47,680 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:47,680 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2018-10-01 00:56:47,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-01 00:56:47,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-01 00:56:47,681 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:47,681 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 42 states. [2018-10-01 00:56:49,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:49,246 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2018-10-01 00:56:49,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-01 00:56:49,246 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-01 00:56:49,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:49,247 INFO L225 Difference]: With dead ends: 68 [2018-10-01 00:56:49,247 INFO L226 Difference]: Without dead ends: 45 [2018-10-01 00:56:49,247 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time [2018-10-01 00:56:49,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-01 00:56:49,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-01 00:56:49,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-01 00:56:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2018-10-01 00:56:49,256 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2018-10-01 00:56:49,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:49,256 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2018-10-01 00:56:49,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-01 00:56:49,256 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2018-10-01 00:56:49,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-01 00:56:49,257 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:49,257 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 1, 1, 1, 1] [2018-10-01 00:56:49,257 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:49,257 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:49,258 INFO L82 PathProgramCache]: Analyzing trace with hash 2070347801, now seen corresponding path program 18 times [2018-10-01 00:56:49,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:49,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:49,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:49,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:49,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:49,550 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:49,551 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:49,551 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 00:56:49,566 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:56:49,600 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2018-10-01 00:56:49,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:49,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:49,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:49,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2018-10-01 00:56:49,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-01 00:56:49,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-01 00:56:49,743 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:49,743 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2018-10-01 00:56:50,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:50,210 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2018-10-01 00:56:50,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-01 00:56:50,210 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2018-10-01 00:56:50,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:50,211 INFO L225 Difference]: With dead ends: 53 [2018-10-01 00:56:50,211 INFO L226 Difference]: Without dead ends: 51 [2018-10-01 00:56:50,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:56:50,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-01 00:56:50,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2018-10-01 00:56:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-01 00:56:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2018-10-01 00:56:50,220 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2018-10-01 00:56:50,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:50,220 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2018-10-01 00:56:50,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-01 00:56:50,221 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2018-10-01 00:56:50,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-01 00:56:50,221 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:50,221 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1] [2018-10-01 00:56:50,222 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:50,222 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:50,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1034431059, now seen corresponding path program 19 times [2018-10-01 00:56:50,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:50,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:50,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:50,223 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:50,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:50,416 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:50,416 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:56:50,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:56:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:50,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 110 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:50,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:50,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2018-10-01 00:56:50,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-01 00:56:50,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-01 00:56:50,882 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:50,882 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 46 states. [2018-10-01 00:56:52,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:52,297 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2018-10-01 00:56:52,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-01 00:56:52,297 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-01 00:56:52,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:52,298 INFO L225 Difference]: With dead ends: 74 [2018-10-01 00:56:52,298 INFO L226 Difference]: Without dead ends: 49 [2018-10-01 00:56:52,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-10-01 00:56:52,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-01 00:56:52,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-01 00:56:52,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-01 00:56:52,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2018-10-01 00:56:52,306 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2018-10-01 00:56:52,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:52,306 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2018-10-01 00:56:52,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-01 00:56:52,306 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2018-10-01 00:56:52,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-01 00:56:52,307 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:52,307 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 1, 1, 1, 1] [2018-10-01 00:56:52,307 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:52,307 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:52,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2120767373, now seen corresponding path program 20 times [2018-10-01 00:56:52,308 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:52,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:52,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:52,309 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:56:52,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:52,541 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:52,542 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 00:56:52,550 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:56:52,585 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:56:52,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:52,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 132 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:52,749 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:52,749 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2018-10-01 00:56:52,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-01 00:56:52,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-01 00:56:52,750 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:52,750 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 17 states. [2018-10-01 00:56:53,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:53,412 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2018-10-01 00:56:53,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-01 00:56:53,418 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2018-10-01 00:56:53,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:53,418 INFO L225 Difference]: With dead ends: 57 [2018-10-01 00:56:53,418 INFO L226 Difference]: Without dead ends: 55 [2018-10-01 00:56:53,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:56:53,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-01 00:56:53,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2018-10-01 00:56:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-01 00:56:53,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2018-10-01 00:56:53,428 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2018-10-01 00:56:53,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:53,429 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2018-10-01 00:56:53,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-01 00:56:53,429 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2018-10-01 00:56:53,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-01 00:56:53,429 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:53,430 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1] [2018-10-01 00:56:53,430 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:53,430 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:53,430 INFO L82 PathProgramCache]: Analyzing trace with hash -2051967801, now seen corresponding path program 21 times [2018-10-01 00:56:53,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:53,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:53,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:53,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:53,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:53,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:53,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:56:53,789 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:56:53,825 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-01 00:56:53,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:53,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 132 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:54,193 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:54,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2018-10-01 00:56:54,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-01 00:56:54,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-01 00:56:54,194 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:54,195 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 50 states. [2018-10-01 00:56:56,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:56,083 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2018-10-01 00:56:56,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-01 00:56:56,084 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-01 00:56:56,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:56,084 INFO L225 Difference]: With dead ends: 80 [2018-10-01 00:56:56,085 INFO L226 Difference]: Without dead ends: 53 [2018-10-01 00:56:56,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-10-01 00:56:56,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-01 00:56:56,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-01 00:56:56,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-01 00:56:56,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2018-10-01 00:56:56,094 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2018-10-01 00:56:56,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:56,094 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2018-10-01 00:56:56,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-01 00:56:56,094 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2018-10-01 00:56:56,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-01 00:56:56,095 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:56,095 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 1, 1, 1, 1] [2018-10-01 00:56:56,095 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:56,095 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:56,095 INFO L82 PathProgramCache]: Analyzing trace with hash -473664255, now seen corresponding path program 22 times [2018-10-01 00:56:56,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:56,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:56,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:56,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:56,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:56,268 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:56,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:56,268 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 00:56:56,276 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:56:56,308 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:56:56,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:56,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 156 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:56,432 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:56,432 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2018-10-01 00:56:56,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-01 00:56:56,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-01 00:56:56,433 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:56,433 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 18 states. [2018-10-01 00:56:57,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:56:57,142 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2018-10-01 00:56:57,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-01 00:56:57,143 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2018-10-01 00:56:57,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:56:57,143 INFO L225 Difference]: With dead ends: 61 [2018-10-01 00:56:57,144 INFO L226 Difference]: Without dead ends: 59 [2018-10-01 00:56:57,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-10-01 00:56:57,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-01 00:56:57,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-10-01 00:56:57,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-01 00:56:57,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2018-10-01 00:56:57,152 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2018-10-01 00:56:57,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:56:57,152 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2018-10-01 00:56:57,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-01 00:56:57,152 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2018-10-01 00:56:57,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-01 00:56:57,154 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:56:57,154 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1] [2018-10-01 00:56:57,154 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:56:57,154 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:56:57,154 INFO L82 PathProgramCache]: Analyzing trace with hash 75236667, now seen corresponding path program 23 times [2018-10-01 00:56:57,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:56:57,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:56:57,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:57,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:56:57,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:56:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:56:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:58,050 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:56:58,050 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 00:56:58,057 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:56:58,106 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-01 00:56:58,107 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:56:58,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:56:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 156 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:56:58,595 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:56:58,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 53 [2018-10-01 00:56:58,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-01 00:56:58,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-01 00:56:58,596 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:56:58,596 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 54 states. [2018-10-01 00:57:01,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:01,379 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2018-10-01 00:57:01,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-01 00:57:01,379 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-01 00:57:01,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:01,380 INFO L225 Difference]: With dead ends: 86 [2018-10-01 00:57:01,380 INFO L226 Difference]: Without dead ends: 57 [2018-10-01 00:57:01,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-10-01 00:57:01,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-01 00:57:01,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-01 00:57:01,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-01 00:57:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2018-10-01 00:57:01,387 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2018-10-01 00:57:01,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:01,387 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2018-10-01 00:57:01,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-01 00:57:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2018-10-01 00:57:01,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-01 00:57:01,388 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:01,388 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 1, 1, 1, 1] [2018-10-01 00:57:01,388 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:01,388 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:01,389 INFO L82 PathProgramCache]: Analyzing trace with hash 608196725, now seen corresponding path program 24 times [2018-10-01 00:57:01,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:01,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:01,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:01,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:01,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:01,704 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:01,704 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:01,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 00:57:01,711 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:57:01,752 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2018-10-01 00:57:01,752 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:01,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 182 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:01,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:01,869 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2018-10-01 00:57:01,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-01 00:57:01,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-01 00:57:01,870 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:01,870 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2018-10-01 00:57:02,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:02,408 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2018-10-01 00:57:02,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-01 00:57:02,409 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2018-10-01 00:57:02,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:02,410 INFO L225 Difference]: With dead ends: 65 [2018-10-01 00:57:02,410 INFO L226 Difference]: Without dead ends: 63 [2018-10-01 00:57:02,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:57:02,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-01 00:57:02,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2018-10-01 00:57:02,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-01 00:57:02,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2018-10-01 00:57:02,419 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2018-10-01 00:57:02,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:02,419 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2018-10-01 00:57:02,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-01 00:57:02,419 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2018-10-01 00:57:02,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-01 00:57:02,420 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:02,420 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1] [2018-10-01 00:57:02,420 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:02,420 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:02,420 INFO L82 PathProgramCache]: Analyzing trace with hash 361552815, now seen corresponding path program 25 times [2018-10-01 00:57:02,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:02,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:02,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:02,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:02,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:02,781 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:02,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:02,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:57:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:02,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 182 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:03,448 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:03,448 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 57 [2018-10-01 00:57:03,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-01 00:57:03,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-01 00:57:03,449 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:03,449 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 58 states. [2018-10-01 00:57:06,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:06,190 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2018-10-01 00:57:06,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-01 00:57:06,191 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-01 00:57:06,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:06,191 INFO L225 Difference]: With dead ends: 92 [2018-10-01 00:57:06,191 INFO L226 Difference]: Without dead ends: 61 [2018-10-01 00:57:06,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-10-01 00:57:06,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-01 00:57:06,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-01 00:57:06,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-01 00:57:06,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2018-10-01 00:57:06,200 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 58 [2018-10-01 00:57:06,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:06,200 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2018-10-01 00:57:06,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-01 00:57:06,201 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2018-10-01 00:57:06,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-01 00:57:06,201 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:06,201 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 1, 1, 1, 1] [2018-10-01 00:57:06,202 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:06,202 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:06,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1210122729, now seen corresponding path program 26 times [2018-10-01 00:57:06,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:06,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:06,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:06,203 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:57:06,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:06,427 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:06,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:06,427 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:06,435 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:57:06,473 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:57:06,474 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:06,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 210 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:06,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:06,615 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2018-10-01 00:57:06,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-01 00:57:06,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-01 00:57:06,615 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:06,616 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 20 states. [2018-10-01 00:57:07,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:07,246 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2018-10-01 00:57:07,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-01 00:57:07,247 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2018-10-01 00:57:07,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:07,248 INFO L225 Difference]: With dead ends: 69 [2018-10-01 00:57:07,248 INFO L226 Difference]: Without dead ends: 67 [2018-10-01 00:57:07,248 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:57:07,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-01 00:57:07,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-10-01 00:57:07,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-01 00:57:07,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2018-10-01 00:57:07,255 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 60 [2018-10-01 00:57:07,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:07,256 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2018-10-01 00:57:07,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-01 00:57:07,256 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2018-10-01 00:57:07,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-01 00:57:07,256 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:07,256 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1] [2018-10-01 00:57:07,257 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:07,257 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:07,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1008142301, now seen corresponding path program 27 times [2018-10-01 00:57:07,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:07,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:07,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:07,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:07,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:07,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:07,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:07,665 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:57:07,710 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-01 00:57:07,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:07,712 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 210 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:08,700 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:08,700 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 61 [2018-10-01 00:57:08,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-01 00:57:08,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-01 00:57:08,701 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:08,701 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 62 states. [2018-10-01 00:57:12,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:12,028 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2018-10-01 00:57:12,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-01 00:57:12,029 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-01 00:57:12,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:12,029 INFO L225 Difference]: With dead ends: 98 [2018-10-01 00:57:12,029 INFO L226 Difference]: Without dead ends: 65 [2018-10-01 00:57:12,030 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-10-01 00:57:12,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-01 00:57:12,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-01 00:57:12,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-01 00:57:12,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2018-10-01 00:57:12,038 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 62 [2018-10-01 00:57:12,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:12,038 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2018-10-01 00:57:12,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-01 00:57:12,039 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2018-10-01 00:57:12,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-01 00:57:12,039 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:12,039 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 1, 1, 1, 1] [2018-10-01 00:57:12,039 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:12,040 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:12,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1490325155, now seen corresponding path program 28 times [2018-10-01 00:57:12,040 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:12,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:12,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:12,041 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:12,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:12,302 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:12,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:12,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:12,313 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:57:12,351 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:57:12,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:12,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 240 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:12,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:12,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2018-10-01 00:57:12,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-01 00:57:12,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-01 00:57:12,573 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:12,573 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 21 states. [2018-10-01 00:57:13,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:13,266 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2018-10-01 00:57:13,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-01 00:57:13,267 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2018-10-01 00:57:13,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:13,268 INFO L225 Difference]: With dead ends: 73 [2018-10-01 00:57:13,268 INFO L226 Difference]: Without dead ends: 71 [2018-10-01 00:57:13,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 00:57:13,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-01 00:57:13,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2018-10-01 00:57:13,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-01 00:57:13,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2018-10-01 00:57:13,279 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 64 [2018-10-01 00:57:13,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:13,280 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2018-10-01 00:57:13,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-01 00:57:13,280 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2018-10-01 00:57:13,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-01 00:57:13,280 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:13,280 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1] [2018-10-01 00:57:13,280 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:13,280 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:13,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1978312041, now seen corresponding path program 29 times [2018-10-01 00:57:13,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:13,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:13,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:13,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:13,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:14,363 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:14,363 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:14,372 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:57:14,419 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-01 00:57:14,419 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:14,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 240 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:14,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:14,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 65 [2018-10-01 00:57:14,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-01 00:57:14,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-01 00:57:14,984 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:14,984 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 66 states. [2018-10-01 00:57:18,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:18,359 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2018-10-01 00:57:18,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-01 00:57:18,359 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-01 00:57:18,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:18,360 INFO L225 Difference]: With dead ends: 104 [2018-10-01 00:57:18,360 INFO L226 Difference]: Without dead ends: 69 [2018-10-01 00:57:18,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time [2018-10-01 00:57:18,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-01 00:57:18,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-01 00:57:18,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-01 00:57:18,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2018-10-01 00:57:18,368 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 66 [2018-10-01 00:57:18,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:18,368 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2018-10-01 00:57:18,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-01 00:57:18,368 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2018-10-01 00:57:18,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-01 00:57:18,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:18,369 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 1, 1, 1, 1] [2018-10-01 00:57:18,369 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:18,369 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:18,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1465604399, now seen corresponding path program 30 times [2018-10-01 00:57:18,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:18,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:18,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:18,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:18,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:19,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:19,086 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:19,093 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:57:19,143 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2018-10-01 00:57:19,143 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:19,145 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 272 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:19,419 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:19,419 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2018-10-01 00:57:19,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-01 00:57:19,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-01 00:57:19,420 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:19,420 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 22 states. [2018-10-01 00:57:20,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:20,155 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2018-10-01 00:57:20,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-01 00:57:20,156 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2018-10-01 00:57:20,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:20,157 INFO L225 Difference]: With dead ends: 77 [2018-10-01 00:57:20,157 INFO L226 Difference]: Without dead ends: 75 [2018-10-01 00:57:20,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-10-01 00:57:20,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-01 00:57:20,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2018-10-01 00:57:20,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-01 00:57:20,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2018-10-01 00:57:20,170 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 68 [2018-10-01 00:57:20,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:20,170 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2018-10-01 00:57:20,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-01 00:57:20,170 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2018-10-01 00:57:20,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-01 00:57:20,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:20,171 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1] [2018-10-01 00:57:20,171 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:20,171 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:20,171 INFO L82 PathProgramCache]: Analyzing trace with hash 303497995, now seen corresponding path program 31 times [2018-10-01 00:57:20,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:20,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:20,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:20,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:20,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:20,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:20,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:20,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:57:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:20,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 272 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:21,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:21,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 69 [2018-10-01 00:57:21,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-01 00:57:21,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-01 00:57:21,465 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:21,465 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 70 states. [2018-10-01 00:57:25,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:25,890 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2018-10-01 00:57:25,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-01 00:57:25,890 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-10-01 00:57:25,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:25,891 INFO L225 Difference]: With dead ends: 110 [2018-10-01 00:57:25,891 INFO L226 Difference]: Without dead ends: 73 [2018-10-01 00:57:25,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-10-01 00:57:25,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-01 00:57:25,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-01 00:57:25,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-01 00:57:25,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2018-10-01 00:57:25,901 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 70 [2018-10-01 00:57:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:25,901 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2018-10-01 00:57:25,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-01 00:57:25,901 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2018-10-01 00:57:25,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-01 00:57:25,902 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:25,902 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 1, 1, 1, 1] [2018-10-01 00:57:25,902 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:25,902 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:25,902 INFO L82 PathProgramCache]: Analyzing trace with hash -2091802043, now seen corresponding path program 32 times [2018-10-01 00:57:25,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:25,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:25,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:25,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:57:25,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:26,172 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:26,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:26,180 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:57:26,226 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:57:26,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:26,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 306 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:26,372 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:26,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2018-10-01 00:57:26,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-01 00:57:26,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-01 00:57:26,373 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:26,373 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 23 states. [2018-10-01 00:57:27,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:27,190 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2018-10-01 00:57:27,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-01 00:57:27,191 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2018-10-01 00:57:27,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:27,192 INFO L225 Difference]: With dead ends: 81 [2018-10-01 00:57:27,192 INFO L226 Difference]: Without dead ends: 79 [2018-10-01 00:57:27,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-10-01 00:57:27,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-01 00:57:27,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-10-01 00:57:27,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-01 00:57:27,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2018-10-01 00:57:27,203 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 72 [2018-10-01 00:57:27,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:27,203 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2018-10-01 00:57:27,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-01 00:57:27,204 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2018-10-01 00:57:27,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-01 00:57:27,204 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:27,204 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1] [2018-10-01 00:57:27,204 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:27,204 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:27,204 INFO L82 PathProgramCache]: Analyzing trace with hash -177016449, now seen corresponding path program 33 times [2018-10-01 00:57:27,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:27,205 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:27,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:27,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:27,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:27,565 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:27,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:27,572 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:57:27,633 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-01 00:57:27,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:27,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 306 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:28,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:28,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2018-10-01 00:57:28,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-01 00:57:28,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-01 00:57:28,502 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:28,502 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 74 states. [2018-10-01 00:57:32,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:32,138 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2018-10-01 00:57:32,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-01 00:57:32,138 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-10-01 00:57:32,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:32,139 INFO L225 Difference]: With dead ends: 116 [2018-10-01 00:57:32,139 INFO L226 Difference]: Without dead ends: 77 [2018-10-01 00:57:32,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-10-01 00:57:32,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-01 00:57:32,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-01 00:57:32,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-01 00:57:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2018-10-01 00:57:32,151 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 74 [2018-10-01 00:57:32,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:32,151 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2018-10-01 00:57:32,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-01 00:57:32,151 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2018-10-01 00:57:32,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-01 00:57:32,152 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:32,152 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 17, 1, 1, 1, 1] [2018-10-01 00:57:32,152 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:32,152 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:32,152 INFO L82 PathProgramCache]: Analyzing trace with hash -42507335, now seen corresponding path program 34 times [2018-10-01 00:57:32,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:32,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:32,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:32,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:32,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:32,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:32,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:32,416 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:57:32,466 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:57:32,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:32,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:32,594 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 342 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:32,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:32,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2018-10-01 00:57:32,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-01 00:57:32,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-01 00:57:32,617 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:32,617 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand 24 states. [2018-10-01 00:57:33,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:33,452 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2018-10-01 00:57:33,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-01 00:57:33,452 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2018-10-01 00:57:33,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:33,453 INFO L225 Difference]: With dead ends: 85 [2018-10-01 00:57:33,453 INFO L226 Difference]: Without dead ends: 83 [2018-10-01 00:57:33,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 00:57:33,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-01 00:57:33,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2018-10-01 00:57:33,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-01 00:57:33,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2018-10-01 00:57:33,465 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 76 [2018-10-01 00:57:33,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:33,466 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2018-10-01 00:57:33,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-01 00:57:33,466 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2018-10-01 00:57:33,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-01 00:57:33,466 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:33,466 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1] [2018-10-01 00:57:33,467 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:33,467 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:33,467 INFO L82 PathProgramCache]: Analyzing trace with hash 2100176371, now seen corresponding path program 35 times [2018-10-01 00:57:33,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:33,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:33,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:33,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:33,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:34,057 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:34,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:34,066 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:57:34,126 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-01 00:57:34,127 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:34,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:34,887 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 342 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:34,907 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:34,908 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 77 [2018-10-01 00:57:34,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-01 00:57:34,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-01 00:57:34,908 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:34,909 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 78 states. [2018-10-01 00:57:39,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:39,174 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2018-10-01 00:57:39,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-01 00:57:39,174 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-10-01 00:57:39,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:39,175 INFO L225 Difference]: With dead ends: 122 [2018-10-01 00:57:39,175 INFO L226 Difference]: Without dead ends: 81 [2018-10-01 00:57:39,175 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-10-01 00:57:39,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-01 00:57:39,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-01 00:57:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-01 00:57:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2018-10-01 00:57:39,185 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 78 [2018-10-01 00:57:39,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:39,186 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2018-10-01 00:57:39,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-01 00:57:39,186 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2018-10-01 00:57:39,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-01 00:57:39,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:39,187 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 18, 1, 1, 1, 1] [2018-10-01 00:57:39,187 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:39,187 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:39,187 INFO L82 PathProgramCache]: Analyzing trace with hash 752544557, now seen corresponding path program 36 times [2018-10-01 00:57:39,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:39,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:39,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:39,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:39,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:39,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:39,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:39,613 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:57:39,675 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-01 00:57:39,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:39,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:39,814 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 380 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:39,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:39,834 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2018-10-01 00:57:39,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-01 00:57:39,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-01 00:57:39,835 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:39,835 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 25 states. [2018-10-01 00:57:40,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:40,733 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2018-10-01 00:57:40,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-01 00:57:40,734 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2018-10-01 00:57:40,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:40,735 INFO L225 Difference]: With dead ends: 89 [2018-10-01 00:57:40,735 INFO L226 Difference]: Without dead ends: 87 [2018-10-01 00:57:40,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 00:57:40,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-01 00:57:40,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2018-10-01 00:57:40,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-01 00:57:40,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2018-10-01 00:57:40,748 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 80 [2018-10-01 00:57:40,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:40,748 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2018-10-01 00:57:40,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-01 00:57:40,748 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2018-10-01 00:57:40,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-01 00:57:40,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:40,749 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1] [2018-10-01 00:57:40,749 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:40,749 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:40,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1640865895, now seen corresponding path program 37 times [2018-10-01 00:57:40,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:40,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:40,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:40,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:40,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:41,372 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:41,372 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:41,372 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:41,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:57:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:41,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 760 backedges. 380 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:42,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:42,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 81 [2018-10-01 00:57:42,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-01 00:57:42,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-01 00:57:42,134 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:42,134 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 82 states. [2018-10-01 00:57:46,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:46,440 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2018-10-01 00:57:46,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-01 00:57:46,440 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-10-01 00:57:46,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:46,440 INFO L225 Difference]: With dead ends: 128 [2018-10-01 00:57:46,441 INFO L226 Difference]: Without dead ends: 85 [2018-10-01 00:57:46,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-10-01 00:57:46,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-01 00:57:46,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-01 00:57:46,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-01 00:57:46,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2018-10-01 00:57:46,454 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 82 [2018-10-01 00:57:46,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:46,455 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2018-10-01 00:57:46,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-01 00:57:46,455 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2018-10-01 00:57:46,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-01 00:57:46,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:46,455 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 19, 1, 1, 1, 1] [2018-10-01 00:57:46,455 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:46,455 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:46,456 INFO L82 PathProgramCache]: Analyzing trace with hash 918632609, now seen corresponding path program 38 times [2018-10-01 00:57:46,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:46,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:46,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:46,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:57:46,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:46,790 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:46,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:46,797 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:57:46,849 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:57:46,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:46,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 420 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:47,009 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:47,009 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2018-10-01 00:57:47,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-01 00:57:47,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-01 00:57:47,010 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:47,010 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2018-10-01 00:57:47,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:47,928 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2018-10-01 00:57:47,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-01 00:57:47,929 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2018-10-01 00:57:47,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:47,930 INFO L225 Difference]: With dead ends: 93 [2018-10-01 00:57:47,930 INFO L226 Difference]: Without dead ends: 91 [2018-10-01 00:57:47,930 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-10-01 00:57:47,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-01 00:57:47,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2018-10-01 00:57:47,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-01 00:57:47,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2018-10-01 00:57:47,944 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 84 [2018-10-01 00:57:47,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:47,944 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2018-10-01 00:57:47,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-01 00:57:47,944 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2018-10-01 00:57:47,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-01 00:57:47,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:47,945 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1] [2018-10-01 00:57:47,945 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:47,945 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:47,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1957273381, now seen corresponding path program 39 times [2018-10-01 00:57:47,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:47,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:47,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:47,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:47,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:48,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:48,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:48,378 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:57:48,457 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-01 00:57:48,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:48,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 420 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:49,349 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:49,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 85 [2018-10-01 00:57:49,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-01 00:57:49,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-01 00:57:49,350 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:49,350 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 86 states. [2018-10-01 00:57:54,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:54,624 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2018-10-01 00:57:54,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-01 00:57:54,624 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-10-01 00:57:54,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:54,624 INFO L225 Difference]: With dead ends: 134 [2018-10-01 00:57:54,624 INFO L226 Difference]: Without dead ends: 89 [2018-10-01 00:57:54,625 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-10-01 00:57:54,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-01 00:57:54,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-01 00:57:54,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-01 00:57:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2018-10-01 00:57:54,636 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 86 [2018-10-01 00:57:54,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:54,637 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2018-10-01 00:57:54,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-01 00:57:54,637 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2018-10-01 00:57:54,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-01 00:57:54,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:54,637 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 20, 1, 1, 1, 1] [2018-10-01 00:57:54,637 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:54,638 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:54,638 INFO L82 PathProgramCache]: Analyzing trace with hash 267340821, now seen corresponding path program 40 times [2018-10-01 00:57:54,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:54,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:54,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:54,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:54,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:54,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:55,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:55,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:55,008 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:57:55,065 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:57:55,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:55,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 462 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:55,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:55,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2018-10-01 00:57:55,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-01 00:57:55,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-01 00:57:55,248 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:55,248 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand 27 states. [2018-10-01 00:57:56,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:57:56,159 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2018-10-01 00:57:56,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-01 00:57:56,160 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 88 [2018-10-01 00:57:56,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:57:56,161 INFO L225 Difference]: With dead ends: 97 [2018-10-01 00:57:56,161 INFO L226 Difference]: Without dead ends: 95 [2018-10-01 00:57:56,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 00:57:56,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-01 00:57:56,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2018-10-01 00:57:56,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-01 00:57:56,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2018-10-01 00:57:56,180 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 88 [2018-10-01 00:57:56,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:57:56,180 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2018-10-01 00:57:56,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-01 00:57:56,181 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2018-10-01 00:57:56,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-01 00:57:56,181 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:57:56,181 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1] [2018-10-01 00:57:56,181 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:57:56,181 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:57:56,182 INFO L82 PathProgramCache]: Analyzing trace with hash -783456433, now seen corresponding path program 41 times [2018-10-01 00:57:56,182 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:57:56,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:57:56,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:56,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:57:56,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:57:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:57:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:57,713 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:57:57,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:57:57,720 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:57:57,789 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-01 00:57:57,789 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:57:57,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:57:58,712 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 462 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:57:58,733 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:57:58,733 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 89 [2018-10-01 00:57:58,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-01 00:57:58,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-01 00:57:58,734 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:57:58,734 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 90 states. [2018-10-01 00:58:04,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:04,296 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2018-10-01 00:58:04,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-01 00:58:04,297 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-10-01 00:58:04,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:04,297 INFO L225 Difference]: With dead ends: 140 [2018-10-01 00:58:04,297 INFO L226 Difference]: Without dead ends: 93 [2018-10-01 00:58:04,298 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time [2018-10-01 00:58:04,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-01 00:58:04,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-01 00:58:04,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-01 00:58:04,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2018-10-01 00:58:04,312 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 90 [2018-10-01 00:58:04,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:04,312 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2018-10-01 00:58:04,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-01 00:58:04,312 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2018-10-01 00:58:04,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-01 00:58:04,313 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:04,313 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 21, 1, 1, 1, 1] [2018-10-01 00:58:04,313 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:04,314 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:04,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1017783689, now seen corresponding path program 42 times [2018-10-01 00:58:04,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:04,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:04,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:04,315 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:04,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:04,820 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:04,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:04,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:04,829 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:58:04,899 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2018-10-01 00:58:04,899 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:04,902 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 506 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:06,259 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:06,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2018-10-01 00:58:06,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-01 00:58:06,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-01 00:58:06,260 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:06,260 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 28 states. [2018-10-01 00:58:07,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:07,256 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2018-10-01 00:58:07,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-01 00:58:07,256 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 92 [2018-10-01 00:58:07,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:07,257 INFO L225 Difference]: With dead ends: 101 [2018-10-01 00:58:07,258 INFO L226 Difference]: Without dead ends: 99 [2018-10-01 00:58:07,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time [2018-10-01 00:58:07,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-01 00:58:07,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-10-01 00:58:07,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-01 00:58:07,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2018-10-01 00:58:07,274 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 92 [2018-10-01 00:58:07,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:07,275 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2018-10-01 00:58:07,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-01 00:58:07,275 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2018-10-01 00:58:07,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-01 00:58:07,275 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:07,275 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1] [2018-10-01 00:58:07,276 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:07,276 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:07,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1162366013, now seen corresponding path program 43 times [2018-10-01 00:58:07,276 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:07,276 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:07,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:07,277 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:07,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:07,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:07,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:07,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:58:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:07,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 506 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:08,755 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:08,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 93 [2018-10-01 00:58:08,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-01 00:58:08,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-01 00:58:08,756 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:08,756 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 94 states. [2018-10-01 00:58:14,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:14,930 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2018-10-01 00:58:14,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-01 00:58:14,931 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-10-01 00:58:14,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:14,931 INFO L225 Difference]: With dead ends: 146 [2018-10-01 00:58:14,932 INFO L226 Difference]: Without dead ends: 97 [2018-10-01 00:58:14,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-10-01 00:58:14,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-01 00:58:14,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-01 00:58:14,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-01 00:58:14,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2018-10-01 00:58:14,945 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 94 [2018-10-01 00:58:14,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:14,946 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2018-10-01 00:58:14,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-01 00:58:14,946 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2018-10-01 00:58:14,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-01 00:58:14,946 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:14,947 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 22, 1, 1, 1, 1] [2018-10-01 00:58:14,947 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:14,947 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:14,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1867070211, now seen corresponding path program 44 times [2018-10-01 00:58:14,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:14,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:14,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:14,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:58:14,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:15,232 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:15,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:15,241 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:58:15,302 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:58:15,302 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:15,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:15,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 552 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:15,513 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:15,513 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2018-10-01 00:58:15,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-01 00:58:15,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-01 00:58:15,514 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:15,514 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 29 states. [2018-10-01 00:58:16,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:16,547 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2018-10-01 00:58:16,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-01 00:58:16,547 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2018-10-01 00:58:16,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:16,548 INFO L225 Difference]: With dead ends: 105 [2018-10-01 00:58:16,548 INFO L226 Difference]: Without dead ends: 103 [2018-10-01 00:58:16,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-10-01 00:58:16,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-01 00:58:16,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2018-10-01 00:58:16,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-01 00:58:16,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2018-10-01 00:58:16,565 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 96 [2018-10-01 00:58:16,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:16,566 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2018-10-01 00:58:16,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-01 00:58:16,566 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2018-10-01 00:58:16,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-01 00:58:16,567 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:16,567 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1] [2018-10-01 00:58:16,567 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:16,567 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:16,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1041909303, now seen corresponding path program 45 times [2018-10-01 00:58:16,567 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:16,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:16,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:16,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:16,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:18,079 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:18,079 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:18,087 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:58:18,163 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-01 00:58:18,163 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:18,166 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1104 backedges. 552 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:19,207 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:19,207 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 97 [2018-10-01 00:58:19,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-01 00:58:19,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-01 00:58:19,208 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:19,208 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 98 states. [2018-10-01 00:58:25,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:25,409 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2018-10-01 00:58:25,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-01 00:58:25,409 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-10-01 00:58:25,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:25,410 INFO L225 Difference]: With dead ends: 152 [2018-10-01 00:58:25,410 INFO L226 Difference]: Without dead ends: 101 [2018-10-01 00:58:25,410 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time [2018-10-01 00:58:25,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-01 00:58:25,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-01 00:58:25,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-01 00:58:25,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2018-10-01 00:58:25,428 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 98 [2018-10-01 00:58:25,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:25,428 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2018-10-01 00:58:25,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-01 00:58:25,428 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2018-10-01 00:58:25,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-01 00:58:25,428 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:25,429 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 23, 1, 1, 1, 1] [2018-10-01 00:58:25,429 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:25,429 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:25,429 INFO L82 PathProgramCache]: Analyzing trace with hash -279303567, now seen corresponding path program 46 times [2018-10-01 00:58:25,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:25,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:25,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:25,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:25,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:25,874 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:25,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:25,881 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:58:25,946 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:58:25,946 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:25,950 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:26,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 600 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:26,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:26,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2018-10-01 00:58:26,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-01 00:58:26,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-01 00:58:26,151 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:26,151 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 30 states. [2018-10-01 00:58:27,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:27,268 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2018-10-01 00:58:27,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-01 00:58:27,269 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 100 [2018-10-01 00:58:27,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:27,270 INFO L225 Difference]: With dead ends: 109 [2018-10-01 00:58:27,270 INFO L226 Difference]: Without dead ends: 107 [2018-10-01 00:58:27,270 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-10-01 00:58:27,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-01 00:58:27,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2018-10-01 00:58:27,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-01 00:58:27,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2018-10-01 00:58:27,289 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 100 [2018-10-01 00:58:27,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:27,289 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2018-10-01 00:58:27,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-01 00:58:27,290 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2018-10-01 00:58:27,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-01 00:58:27,290 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:27,290 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1] [2018-10-01 00:58:27,290 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:27,290 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:27,290 INFO L82 PathProgramCache]: Analyzing trace with hash -2122703189, now seen corresponding path program 47 times [2018-10-01 00:58:27,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:27,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:27,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:27,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:27,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:28,992 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:28,993 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:28,999 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:58:29,084 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-01 00:58:29,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:29,088 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 600 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:30,274 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:30,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 101 [2018-10-01 00:58:30,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-01 00:58:30,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-01 00:58:30,276 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:30,276 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 102 states. [2018-10-01 00:58:39,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:39,987 INFO L93 Difference]: Finished difference Result 158 states and 160 transitions. [2018-10-01 00:58:39,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-01 00:58:39,987 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-10-01 00:58:39,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:39,988 INFO L225 Difference]: With dead ends: 158 [2018-10-01 00:58:39,988 INFO L226 Difference]: Without dead ends: 105 [2018-10-01 00:58:39,988 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time [2018-10-01 00:58:39,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-01 00:58:40,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-01 00:58:40,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-01 00:58:40,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2018-10-01 00:58:40,011 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 102 [2018-10-01 00:58:40,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:40,011 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2018-10-01 00:58:40,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-01 00:58:40,012 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2018-10-01 00:58:40,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-01 00:58:40,012 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:40,012 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 24, 1, 1, 1, 1] [2018-10-01 00:58:40,013 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:40,013 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:40,013 INFO L82 PathProgramCache]: Analyzing trace with hash 190404069, now seen corresponding path program 48 times [2018-10-01 00:58:40,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:40,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:40,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:40,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:40,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:40,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:40,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:40,793 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:58:40,874 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2018-10-01 00:58:40,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:40,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 650 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:41,166 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:41,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2018-10-01 00:58:41,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-01 00:58:41,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-01 00:58:41,167 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:41,167 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 31 states. [2018-10-01 00:58:42,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:42,340 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2018-10-01 00:58:42,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-01 00:58:42,341 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 104 [2018-10-01 00:58:42,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:42,342 INFO L225 Difference]: With dead ends: 113 [2018-10-01 00:58:42,342 INFO L226 Difference]: Without dead ends: 111 [2018-10-01 00:58:42,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-10-01 00:58:42,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-01 00:58:42,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2018-10-01 00:58:42,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-01 00:58:42,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2018-10-01 00:58:42,363 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 104 [2018-10-01 00:58:42,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:42,363 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2018-10-01 00:58:42,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-01 00:58:42,364 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2018-10-01 00:58:42,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-01 00:58:42,364 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:42,364 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1] [2018-10-01 00:58:42,365 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:42,365 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:42,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1705231073, now seen corresponding path program 49 times [2018-10-01 00:58:42,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:42,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:42,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:42,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:42,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:43,578 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:43,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:43,585 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:58:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:43,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1300 backedges. 650 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:44,720 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:44,721 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 105 [2018-10-01 00:58:44,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-01 00:58:44,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-01 00:58:44,722 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:44,722 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 106 states. [2018-10-01 00:58:55,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:55,573 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2018-10-01 00:58:55,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-01 00:58:55,574 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-10-01 00:58:55,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:55,575 INFO L225 Difference]: With dead ends: 164 [2018-10-01 00:58:55,575 INFO L226 Difference]: Without dead ends: 109 [2018-10-01 00:58:55,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time [2018-10-01 00:58:55,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-01 00:58:55,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-01 00:58:55,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-01 00:58:55,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2018-10-01 00:58:55,593 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 106 [2018-10-01 00:58:55,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:55,593 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2018-10-01 00:58:55,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-01 00:58:55,593 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2018-10-01 00:58:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-01 00:58:55,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:55,594 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 25, 1, 1, 1, 1] [2018-10-01 00:58:55,594 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:55,594 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:55,594 INFO L82 PathProgramCache]: Analyzing trace with hash 653870937, now seen corresponding path program 50 times [2018-10-01 00:58:55,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:55,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:55,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:55,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:58:55,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:56,082 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:56,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:56,091 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:58:56,158 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:58:56,158 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:56,161 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 702 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:56,366 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:56,366 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2018-10-01 00:58:56,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-01 00:58:56,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-01 00:58:56,367 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:56,367 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 32 states. [2018-10-01 00:58:57,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:58:57,512 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2018-10-01 00:58:57,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-01 00:58:57,513 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 108 [2018-10-01 00:58:57,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:58:57,514 INFO L225 Difference]: With dead ends: 117 [2018-10-01 00:58:57,514 INFO L226 Difference]: Without dead ends: 115 [2018-10-01 00:58:57,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-10-01 00:58:57,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-01 00:58:57,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2018-10-01 00:58:57,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-01 00:58:57,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2018-10-01 00:58:57,537 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 108 [2018-10-01 00:58:57,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:58:57,537 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2018-10-01 00:58:57,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-01 00:58:57,538 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2018-10-01 00:58:57,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-01 00:58:57,538 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:58:57,538 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1] [2018-10-01 00:58:57,539 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:58:57,539 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:58:57,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1304797587, now seen corresponding path program 51 times [2018-10-01 00:58:57,539 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:58:57,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:58:57,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:57,540 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:58:57,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:58:57,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:58:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:58,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:58:58,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:58:58,339 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:58:58,425 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-01 00:58:58,425 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:58:58,428 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:58:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 702 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:58:59,865 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:58:59,865 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 109 [2018-10-01 00:58:59,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-01 00:58:59,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-01 00:58:59,867 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:58:59,867 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 110 states. [2018-10-01 00:59:06,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:06,641 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2018-10-01 00:59:06,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-01 00:59:06,641 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-10-01 00:59:06,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:06,642 INFO L225 Difference]: With dead ends: 170 [2018-10-01 00:59:06,642 INFO L226 Difference]: Without dead ends: 113 [2018-10-01 00:59:06,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time [2018-10-01 00:59:06,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-01 00:59:06,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-01 00:59:06,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-01 00:59:06,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2018-10-01 00:59:06,660 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 110 [2018-10-01 00:59:06,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:06,660 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2018-10-01 00:59:06,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-01 00:59:06,660 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2018-10-01 00:59:06,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-01 00:59:06,661 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:06,661 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 27, 26, 1, 1, 1, 1] [2018-10-01 00:59:06,661 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:06,661 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:06,661 INFO L82 PathProgramCache]: Analyzing trace with hash -738263347, now seen corresponding path program 52 times [2018-10-01 00:59:06,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:06,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:06,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:06,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:06,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:06,946 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:06,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:06,953 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:59:07,024 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:59:07,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:07,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 756 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:07,285 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:07,285 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2018-10-01 00:59:07,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-01 00:59:07,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-01 00:59:07,286 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:07,286 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 33 states. [2018-10-01 00:59:08,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:08,508 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2018-10-01 00:59:08,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-01 00:59:08,509 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 112 [2018-10-01 00:59:08,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:08,510 INFO L225 Difference]: With dead ends: 121 [2018-10-01 00:59:08,510 INFO L226 Difference]: Without dead ends: 119 [2018-10-01 00:59:08,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-10-01 00:59:08,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-01 00:59:08,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-10-01 00:59:08,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-01 00:59:08,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2018-10-01 00:59:08,534 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 112 [2018-10-01 00:59:08,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:08,534 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2018-10-01 00:59:08,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-01 00:59:08,534 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2018-10-01 00:59:08,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-01 00:59:08,535 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:08,535 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1] [2018-10-01 00:59:08,535 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:08,535 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:08,535 INFO L82 PathProgramCache]: Analyzing trace with hash -801420281, now seen corresponding path program 53 times [2018-10-01 00:59:08,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:08,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:08,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:08,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:08,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:09,248 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:09,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:09,255 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:59:09,345 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-01 00:59:09,345 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:09,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 756 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:10,477 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:10,477 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 113 [2018-10-01 00:59:10,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-10-01 00:59:10,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-10-01 00:59:10,478 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:10,478 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 114 states. [2018-10-01 00:59:21,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:21,645 INFO L93 Difference]: Finished difference Result 176 states and 178 transitions. [2018-10-01 00:59:21,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-01 00:59:21,645 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 114 [2018-10-01 00:59:21,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:21,646 INFO L225 Difference]: With dead ends: 176 [2018-10-01 00:59:21,646 INFO L226 Difference]: Without dead ends: 117 [2018-10-01 00:59:21,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time [2018-10-01 00:59:21,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-01 00:59:21,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-10-01 00:59:21,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-01 00:59:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2018-10-01 00:59:21,667 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 114 [2018-10-01 00:59:21,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:21,667 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2018-10-01 00:59:21,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-10-01 00:59:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2018-10-01 00:59:21,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-01 00:59:21,668 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:21,668 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 28, 27, 1, 1, 1, 1] [2018-10-01 00:59:21,668 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:21,668 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:21,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1280345023, now seen corresponding path program 54 times [2018-10-01 00:59:21,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:21,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:21,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:21,669 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:21,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:21,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:21,984 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:21,990 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 00:59:22,086 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2018-10-01 00:59:22,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:22,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 812 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:23,311 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:23,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2018-10-01 00:59:23,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-01 00:59:23,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-01 00:59:23,313 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:23,313 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 34 states. [2018-10-01 00:59:25,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:25,021 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2018-10-01 00:59:25,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-01 00:59:25,021 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 116 [2018-10-01 00:59:25,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:25,022 INFO L225 Difference]: With dead ends: 125 [2018-10-01 00:59:25,022 INFO L226 Difference]: Without dead ends: 123 [2018-10-01 00:59:25,023 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time [2018-10-01 00:59:25,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-01 00:59:25,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-10-01 00:59:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-01 00:59:25,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2018-10-01 00:59:25,043 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 116 [2018-10-01 00:59:25,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:25,043 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2018-10-01 00:59:25,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-01 00:59:25,043 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2018-10-01 00:59:25,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-01 00:59:25,043 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:25,043 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1] [2018-10-01 00:59:25,044 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:25,044 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:25,044 INFO L82 PathProgramCache]: Analyzing trace with hash -2050868101, now seen corresponding path program 55 times [2018-10-01 00:59:25,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:25,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:25,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:25,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:25,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:25,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:25,638 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:25,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:59:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:25,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1624 backedges. 812 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:27,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:27,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 117 [2018-10-01 00:59:27,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-10-01 00:59:27,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-10-01 00:59:27,115 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:27,115 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 118 states. [2018-10-01 00:59:37,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:37,968 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2018-10-01 00:59:37,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-01 00:59:37,968 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 118 [2018-10-01 00:59:37,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:37,969 INFO L225 Difference]: With dead ends: 182 [2018-10-01 00:59:37,969 INFO L226 Difference]: Without dead ends: 121 [2018-10-01 00:59:37,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time [2018-10-01 00:59:37,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-01 00:59:37,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-01 00:59:37,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-01 00:59:37,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2018-10-01 00:59:37,997 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 118 [2018-10-01 00:59:37,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:37,997 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2018-10-01 00:59:37,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-10-01 00:59:37,997 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2018-10-01 00:59:37,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-10-01 00:59:37,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:37,998 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 29, 28, 1, 1, 1, 1] [2018-10-01 00:59:37,998 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:37,998 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:37,998 INFO L82 PathProgramCache]: Analyzing trace with hash 919584693, now seen corresponding path program 56 times [2018-10-01 00:59:37,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:37,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:37,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:37,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 00:59:37,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:38,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:38,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:38,380 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 00:59:38,451 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 00:59:38,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:38,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:38,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 870 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:38,834 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:38,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2018-10-01 00:59:38,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-01 00:59:38,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-01 00:59:38,835 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:38,835 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 35 states. [2018-10-01 00:59:40,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:40,180 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2018-10-01 00:59:40,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-01 00:59:40,181 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 120 [2018-10-01 00:59:40,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:40,182 INFO L225 Difference]: With dead ends: 129 [2018-10-01 00:59:40,182 INFO L226 Difference]: Without dead ends: 127 [2018-10-01 00:59:40,182 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-10-01 00:59:40,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-01 00:59:40,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2018-10-01 00:59:40,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-10-01 00:59:40,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2018-10-01 00:59:40,205 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 120 [2018-10-01 00:59:40,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:40,205 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2018-10-01 00:59:40,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-01 00:59:40,205 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2018-10-01 00:59:40,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-01 00:59:40,206 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:40,206 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1] [2018-10-01 00:59:40,206 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:40,206 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:40,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1042320657, now seen corresponding path program 57 times [2018-10-01 00:59:40,206 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:40,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:40,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:40,207 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:40,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:40,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:40,926 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:40,926 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:40,934 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 00:59:41,067 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-01 00:59:41,067 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:41,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:42,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1740 backedges. 870 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:42,385 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:42,385 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 121 [2018-10-01 00:59:42,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-10-01 00:59:42,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-10-01 00:59:42,386 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:42,386 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 122 states. [2018-10-01 00:59:54,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:54,795 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2018-10-01 00:59:54,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-01 00:59:54,795 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 122 [2018-10-01 00:59:54,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:54,795 INFO L225 Difference]: With dead ends: 188 [2018-10-01 00:59:54,796 INFO L226 Difference]: Without dead ends: 125 [2018-10-01 00:59:54,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time [2018-10-01 00:59:54,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-10-01 00:59:54,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-10-01 00:59:54,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-01 00:59:54,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2018-10-01 00:59:54,817 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 122 [2018-10-01 00:59:54,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:54,817 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2018-10-01 00:59:54,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-10-01 00:59:54,818 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2018-10-01 00:59:54,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-01 00:59:54,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:54,818 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 30, 29, 1, 1, 1, 1] [2018-10-01 00:59:54,818 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:54,818 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:54,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1571080489, now seen corresponding path program 58 times [2018-10-01 00:59:54,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:54,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:54,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:54,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:54,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:55,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:55,279 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:55,290 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 00:59:55,369 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 00:59:55,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:55,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 930 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:55,609 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:55,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2018-10-01 00:59:55,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-01 00:59:55,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-01 00:59:55,609 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:55,610 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 36 states. [2018-10-01 00:59:56,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 00:59:56,861 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2018-10-01 00:59:56,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-01 00:59:56,862 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2018-10-01 00:59:56,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 00:59:56,863 INFO L225 Difference]: With dead ends: 133 [2018-10-01 00:59:56,863 INFO L226 Difference]: Without dead ends: 131 [2018-10-01 00:59:56,863 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-10-01 00:59:56,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-01 00:59:56,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2018-10-01 00:59:56,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-10-01 00:59:56,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2018-10-01 00:59:56,887 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 124 [2018-10-01 00:59:56,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 00:59:56,887 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2018-10-01 00:59:56,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-01 00:59:56,888 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2018-10-01 00:59:56,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-10-01 00:59:56,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 00:59:56,888 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1] [2018-10-01 00:59:56,889 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 00:59:56,889 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 00:59:56,889 INFO L82 PathProgramCache]: Analyzing trace with hash -2020085917, now seen corresponding path program 59 times [2018-10-01 00:59:56,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 00:59:56,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 00:59:56,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:56,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 00:59:56,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 00:59:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 00:59:57,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:57,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 00:59:57,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 00:59:57,790 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 00:59:57,888 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-01 00:59:57,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 00:59:57,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 00:59:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1860 backedges. 930 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 00:59:59,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 00:59:59,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 125 [2018-10-01 00:59:59,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-10-01 00:59:59,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-10-01 00:59:59,234 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 00:59:59,234 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 126 states. [2018-10-01 01:00:08,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:08,684 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2018-10-01 01:00:08,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-01 01:00:08,684 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 126 [2018-10-01 01:00:08,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:08,684 INFO L225 Difference]: With dead ends: 194 [2018-10-01 01:00:08,685 INFO L226 Difference]: Without dead ends: 129 [2018-10-01 01:00:08,685 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time [2018-10-01 01:00:08,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-01 01:00:08,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-10-01 01:00:08,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-01 01:00:08,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2018-10-01 01:00:08,704 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 126 [2018-10-01 01:00:08,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:08,704 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2018-10-01 01:00:08,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-10-01 01:00:08,705 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2018-10-01 01:00:08,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-01 01:00:08,705 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:08,705 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 31, 30, 1, 1, 1, 1] [2018-10-01 01:00:08,706 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:08,706 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:08,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2012453021, now seen corresponding path program 60 times [2018-10-01 01:00:08,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:08,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:08,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:08,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:00:08,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:09,013 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:09,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:00:09,021 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:00:09,126 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2018-10-01 01:00:09,126 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:00:09,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1922 backedges. 992 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:09,370 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:09,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2018-10-01 01:00:09,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-01 01:00:09,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-01 01:00:09,371 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:09,371 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand 37 states. [2018-10-01 01:00:10,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:10,753 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2018-10-01 01:00:10,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-01 01:00:10,753 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 128 [2018-10-01 01:00:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:10,754 INFO L225 Difference]: With dead ends: 137 [2018-10-01 01:00:10,754 INFO L226 Difference]: Without dead ends: 135 [2018-10-01 01:00:10,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-10-01 01:00:10,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-10-01 01:00:10,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2018-10-01 01:00:10,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-01 01:00:10,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2018-10-01 01:00:10,780 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 128 [2018-10-01 01:00:10,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:10,780 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2018-10-01 01:00:10,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-01 01:00:10,780 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2018-10-01 01:00:10,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-10-01 01:00:10,781 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:10,781 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1] [2018-10-01 01:00:10,781 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:10,781 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:10,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1232122327, now seen corresponding path program 61 times [2018-10-01 01:00:10,781 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:10,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:10,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:10,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:00:10,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:11,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:11,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:11,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:00:11,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:00:11,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:11,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1984 backedges. 992 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:13,046 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:13,046 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 129 [2018-10-01 01:00:13,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-10-01 01:00:13,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-10-01 01:00:13,047 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:13,047 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 130 states. [2018-10-01 01:00:22,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:22,278 INFO L93 Difference]: Finished difference Result 200 states and 202 transitions. [2018-10-01 01:00:22,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-01 01:00:22,278 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 130 [2018-10-01 01:00:22,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:22,278 INFO L225 Difference]: With dead ends: 200 [2018-10-01 01:00:22,279 INFO L226 Difference]: Without dead ends: 133 [2018-10-01 01:00:22,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time [2018-10-01 01:00:22,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-10-01 01:00:22,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-10-01 01:00:22,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-01 01:00:22,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2018-10-01 01:00:22,306 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 130 [2018-10-01 01:00:22,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:22,306 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2018-10-01 01:00:22,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-10-01 01:00:22,306 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2018-10-01 01:00:22,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-01 01:00:22,307 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:22,307 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 32, 31, 1, 1, 1, 1] [2018-10-01 01:00:22,307 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:22,307 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:22,307 INFO L82 PathProgramCache]: Analyzing trace with hash -452907503, now seen corresponding path program 62 times [2018-10-01 01:00:22,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:22,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:22,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:22,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:00:22,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:22,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:22,626 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:22,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:00:22,634 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:00:22,715 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:00:22,716 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:00:22,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 1056 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:23,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:23,176 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2018-10-01 01:00:23,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-01 01:00:23,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-01 01:00:23,177 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:23,177 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 38 states. [2018-10-01 01:00:24,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:24,648 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2018-10-01 01:00:24,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-01 01:00:24,649 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 132 [2018-10-01 01:00:24,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:24,650 INFO L225 Difference]: With dead ends: 141 [2018-10-01 01:00:24,650 INFO L226 Difference]: Without dead ends: 139 [2018-10-01 01:00:24,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-10-01 01:00:24,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-01 01:00:24,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-10-01 01:00:24,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-01 01:00:24,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2018-10-01 01:00:24,687 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 132 [2018-10-01 01:00:24,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:24,687 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2018-10-01 01:00:24,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-01 01:00:24,688 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2018-10-01 01:00:24,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-10-01 01:00:24,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:24,688 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1] [2018-10-01 01:00:24,689 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:24,689 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:24,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1452361141, now seen corresponding path program 63 times [2018-10-01 01:00:24,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:24,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:24,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:24,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:00:24,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:25,419 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:25,420 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:00:25,438 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:00:25,552 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-01 01:00:25,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:00:25,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:27,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2112 backedges. 1056 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:27,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:27,187 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 133 [2018-10-01 01:00:27,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-10-01 01:00:27,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-10-01 01:00:27,189 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:27,189 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 134 states. [2018-10-01 01:00:37,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:37,674 INFO L93 Difference]: Finished difference Result 206 states and 208 transitions. [2018-10-01 01:00:37,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-01 01:00:37,674 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 134 [2018-10-01 01:00:37,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:37,675 INFO L225 Difference]: With dead ends: 206 [2018-10-01 01:00:37,675 INFO L226 Difference]: Without dead ends: 137 [2018-10-01 01:00:37,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time [2018-10-01 01:00:37,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-10-01 01:00:37,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-10-01 01:00:37,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-01 01:00:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2018-10-01 01:00:37,701 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 134 [2018-10-01 01:00:37,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:37,701 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2018-10-01 01:00:37,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-10-01 01:00:37,701 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2018-10-01 01:00:37,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-10-01 01:00:37,702 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:37,702 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 33, 32, 1, 1, 1, 1] [2018-10-01 01:00:37,702 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:37,702 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:37,702 INFO L82 PathProgramCache]: Analyzing trace with hash -745371259, now seen corresponding path program 64 times [2018-10-01 01:00:37,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:37,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:37,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:37,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:00:37,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:37,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:38,034 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:38,034 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:00:38,041 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:00:38,128 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:00:38,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:00:38,132 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2178 backedges. 1122 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:38,525 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:38,525 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2018-10-01 01:00:38,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-01 01:00:38,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-01 01:00:38,526 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:38,526 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand 39 states. [2018-10-01 01:00:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:40,009 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2018-10-01 01:00:40,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-01 01:00:40,009 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 136 [2018-10-01 01:00:40,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:40,010 INFO L225 Difference]: With dead ends: 145 [2018-10-01 01:00:40,010 INFO L226 Difference]: Without dead ends: 143 [2018-10-01 01:00:40,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-10-01 01:00:40,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-10-01 01:00:40,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2018-10-01 01:00:40,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-10-01 01:00:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2018-10-01 01:00:40,037 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 136 [2018-10-01 01:00:40,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:40,037 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2018-10-01 01:00:40,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-01 01:00:40,037 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2018-10-01 01:00:40,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-01 01:00:40,038 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:40,038 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1] [2018-10-01 01:00:40,038 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:40,038 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:40,038 INFO L82 PathProgramCache]: Analyzing trace with hash 957810879, now seen corresponding path program 65 times [2018-10-01 01:00:40,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:40,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:40,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:40,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:00:40,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:40,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:40,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:00:40,750 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:00:40,871 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-01 01:00:40,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:00:40,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:42,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2244 backedges. 1122 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:42,317 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:42,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 137 [2018-10-01 01:00:42,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-10-01 01:00:42,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-10-01 01:00:42,319 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:42,319 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 138 states. [2018-10-01 01:00:54,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:54,989 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2018-10-01 01:00:54,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-01 01:00:54,989 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 138 [2018-10-01 01:00:54,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:54,990 INFO L225 Difference]: With dead ends: 212 [2018-10-01 01:00:54,990 INFO L226 Difference]: Without dead ends: 141 [2018-10-01 01:00:54,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time [2018-10-01 01:00:54,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-01 01:00:55,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-01 01:00:55,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-01 01:00:55,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2018-10-01 01:00:55,026 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 138 [2018-10-01 01:00:55,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:55,026 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2018-10-01 01:00:55,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-10-01 01:00:55,026 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2018-10-01 01:00:55,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-10-01 01:00:55,027 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:55,027 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 34, 33, 1, 1, 1, 1] [2018-10-01 01:00:55,027 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:55,027 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:55,027 INFO L82 PathProgramCache]: Analyzing trace with hash 32287481, now seen corresponding path program 66 times [2018-10-01 01:00:55,027 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:55,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:55,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:55,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:00:55,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:55,372 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:55,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:00:55,380 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:00:55,500 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2018-10-01 01:00:55,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:00:55,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2312 backedges. 1190 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:55,765 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:55,765 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2018-10-01 01:00:55,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-01 01:00:55,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-01 01:00:55,766 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:55,766 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 40 states. [2018-10-01 01:00:57,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:00:57,284 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2018-10-01 01:00:57,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-01 01:00:57,285 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 140 [2018-10-01 01:00:57,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:00:57,286 INFO L225 Difference]: With dead ends: 149 [2018-10-01 01:00:57,286 INFO L226 Difference]: Without dead ends: 147 [2018-10-01 01:00:57,287 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-10-01 01:00:57,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-01 01:00:57,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2018-10-01 01:00:57,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-01 01:00:57,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2018-10-01 01:00:57,324 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 140 [2018-10-01 01:00:57,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:00:57,324 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2018-10-01 01:00:57,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-01 01:00:57,324 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2018-10-01 01:00:57,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-01 01:00:57,325 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:00:57,325 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1] [2018-10-01 01:00:57,325 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:00:57,325 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:00:57,325 INFO L82 PathProgramCache]: Analyzing trace with hash 963550515, now seen corresponding path program 67 times [2018-10-01 01:00:57,325 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:00:57,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:00:57,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:57,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:00:57,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:00:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:58,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:58,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:00:58,010 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:00:58,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:00:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:00:58,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:00:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1190 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:00:59,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:00:59,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 141 [2018-10-01 01:00:59,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-10-01 01:00:59,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-10-01 01:00:59,745 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:00:59,745 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 142 states. [2018-10-01 01:01:04,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:01:04,806 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2018-10-01 01:01:04,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-01 01:01:04,807 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 142 [2018-10-01 01:01:04,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:01:04,807 INFO L225 Difference]: With dead ends: 218 [2018-10-01 01:01:04,807 INFO L226 Difference]: Without dead ends: 145 [2018-10-01 01:01:04,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time [2018-10-01 01:01:04,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-10-01 01:01:04,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-10-01 01:01:04,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-01 01:01:04,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2018-10-01 01:01:04,837 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 142 [2018-10-01 01:01:04,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:01:04,837 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2018-10-01 01:01:04,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-10-01 01:01:04,837 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2018-10-01 01:01:04,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-10-01 01:01:04,838 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:01:04,838 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 35, 34, 1, 1, 1, 1] [2018-10-01 01:01:04,838 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:01:04,839 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:01:04,839 INFO L82 PathProgramCache]: Analyzing trace with hash 2111083117, now seen corresponding path program 68 times [2018-10-01 01:01:04,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:01:04,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:01:04,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:04,839 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:01:04,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:01:05,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:05,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:01:05,209 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:01:05,215 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:01:05,304 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:01:05,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:01:05,307 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:01:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 1260 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:05,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:01:05,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2018-10-01 01:01:05,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-01 01:01:05,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-01 01:01:05,574 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:01:05,575 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 41 states. [2018-10-01 01:01:07,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:01:07,249 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2018-10-01 01:01:07,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-01 01:01:07,249 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2018-10-01 01:01:07,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:01:07,250 INFO L225 Difference]: With dead ends: 153 [2018-10-01 01:01:07,250 INFO L226 Difference]: Without dead ends: 151 [2018-10-01 01:01:07,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-10-01 01:01:07,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-01 01:01:07,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2018-10-01 01:01:07,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-01 01:01:07,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2018-10-01 01:01:07,285 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 144 [2018-10-01 01:01:07,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:01:07,286 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2018-10-01 01:01:07,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-01 01:01:07,286 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2018-10-01 01:01:07,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-01 01:01:07,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:01:07,287 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1] [2018-10-01 01:01:07,287 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:01:07,287 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:01:07,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1526364071, now seen corresponding path program 69 times [2018-10-01 01:01:07,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:01:07,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:01:07,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:07,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:01:07,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:01:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:07,996 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:01:07,996 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:01:08,003 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:01:08,133 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-01 01:01:08,133 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:01:08,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:01:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2520 backedges. 1260 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:09,768 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:01:09,768 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 145 [2018-10-01 01:01:09,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-10-01 01:01:09,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-10-01 01:01:09,769 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:01:09,769 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 146 states. [2018-10-01 01:01:13,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:01:13,882 INFO L93 Difference]: Finished difference Result 224 states and 226 transitions. [2018-10-01 01:01:13,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-01 01:01:13,882 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 146 [2018-10-01 01:01:13,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:01:13,883 INFO L225 Difference]: With dead ends: 224 [2018-10-01 01:01:13,883 INFO L226 Difference]: Without dead ends: 149 [2018-10-01 01:01:13,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time [2018-10-01 01:01:13,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-01 01:01:13,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-10-01 01:01:13,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-01 01:01:13,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2018-10-01 01:01:13,926 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 146 [2018-10-01 01:01:13,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:01:13,926 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2018-10-01 01:01:13,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-10-01 01:01:13,927 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2018-10-01 01:01:13,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-01 01:01:13,927 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:01:13,927 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 36, 35, 1, 1, 1, 1] [2018-10-01 01:01:13,928 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:01:13,928 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:01:13,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1687109601, now seen corresponding path program 70 times [2018-10-01 01:01:13,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:01:13,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:01:13,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:13,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:01:13,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:01:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:14,418 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:01:14,418 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:01:14,424 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:01:14,521 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:01:14,521 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:01:14,525 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:01:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 1332 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:14,795 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:01:14,795 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2018-10-01 01:01:14,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-01 01:01:14,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-01 01:01:14,796 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:01:14,796 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand 42 states. [2018-10-01 01:01:16,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:01:16,406 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2018-10-01 01:01:16,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-01 01:01:16,406 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 148 [2018-10-01 01:01:16,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:01:16,408 INFO L225 Difference]: With dead ends: 157 [2018-10-01 01:01:16,408 INFO L226 Difference]: Without dead ends: 155 [2018-10-01 01:01:16,408 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-10-01 01:01:16,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-10-01 01:01:16,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2018-10-01 01:01:16,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-01 01:01:16,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2018-10-01 01:01:16,444 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 148 [2018-10-01 01:01:16,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:01:16,445 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2018-10-01 01:01:16,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-01 01:01:16,445 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2018-10-01 01:01:16,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-10-01 01:01:16,445 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:01:16,446 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1] [2018-10-01 01:01:16,446 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:01:16,446 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:01:16,446 INFO L82 PathProgramCache]: Analyzing trace with hash 2109708315, now seen corresponding path program 71 times [2018-10-01 01:01:16,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:01:16,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:01:16,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:16,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:01:16,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:01:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:17,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:01:17,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:01:17,232 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:01:17,362 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-01 01:01:17,363 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:01:17,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:01:18,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2664 backedges. 1332 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:18,964 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:01:18,964 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 149 [2018-10-01 01:01:18,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-10-01 01:01:18,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-10-01 01:01:18,966 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:01:18,967 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 150 states. [2018-10-01 01:01:32,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:01:32,824 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2018-10-01 01:01:32,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-01 01:01:32,824 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 150 [2018-10-01 01:01:32,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:01:32,825 INFO L225 Difference]: With dead ends: 230 [2018-10-01 01:01:32,825 INFO L226 Difference]: Without dead ends: 153 [2018-10-01 01:01:32,825 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time [2018-10-01 01:01:32,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-10-01 01:01:32,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-10-01 01:01:32,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-10-01 01:01:32,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2018-10-01 01:01:32,863 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 150 [2018-10-01 01:01:32,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:01:32,864 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2018-10-01 01:01:32,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-10-01 01:01:32,864 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2018-10-01 01:01:32,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-01 01:01:32,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:01:32,865 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 37, 36, 1, 1, 1, 1] [2018-10-01 01:01:32,865 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:01:32,865 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:01:32,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1562266795, now seen corresponding path program 72 times [2018-10-01 01:01:32,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:01:32,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:01:32,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:32,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:01:32,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:01:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:33,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:01:33,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:01:33,237 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:01:33,368 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 38 check-sat command(s) [2018-10-01 01:01:33,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:01:33,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:01:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2738 backedges. 1406 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:33,675 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:01:33,675 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2018-10-01 01:01:33,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-01 01:01:33,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-01 01:01:33,675 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:01:33,676 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 43 states. [2018-10-01 01:01:35,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:01:35,495 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2018-10-01 01:01:35,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-01 01:01:35,496 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 152 [2018-10-01 01:01:35,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:01:35,497 INFO L225 Difference]: With dead ends: 161 [2018-10-01 01:01:35,497 INFO L226 Difference]: Without dead ends: 159 [2018-10-01 01:01:35,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-10-01 01:01:35,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-01 01:01:35,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-10-01 01:01:35,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-01 01:01:35,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2018-10-01 01:01:35,530 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 152 [2018-10-01 01:01:35,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:01:35,531 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2018-10-01 01:01:35,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-01 01:01:35,531 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2018-10-01 01:01:35,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-10-01 01:01:35,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:01:35,531 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1] [2018-10-01 01:01:35,532 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:01:35,532 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:01:35,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1900215951, now seen corresponding path program 73 times [2018-10-01 01:01:35,532 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:01:35,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:01:35,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:35,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:01:35,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:01:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:36,330 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:01:36,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:01:36,337 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:01:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:01:36,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:01:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2812 backedges. 1406 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:38,099 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:01:38,100 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 153 [2018-10-01 01:01:38,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 154 states [2018-10-01 01:01:38,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2018-10-01 01:01:38,101 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:01:38,101 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 154 states. [2018-10-01 01:01:52,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:01:52,537 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2018-10-01 01:01:52,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-01 01:01:52,537 INFO L78 Accepts]: Start accepts. Automaton has 154 states. Word has length 154 [2018-10-01 01:01:52,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:01:52,538 INFO L225 Difference]: With dead ends: 236 [2018-10-01 01:01:52,538 INFO L226 Difference]: Without dead ends: 157 [2018-10-01 01:01:52,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time [2018-10-01 01:01:52,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-10-01 01:01:52,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-10-01 01:01:52,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-01 01:01:52,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2018-10-01 01:01:52,571 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 154 [2018-10-01 01:01:52,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:01:52,571 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2018-10-01 01:01:52,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 154 states. [2018-10-01 01:01:52,571 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2018-10-01 01:01:52,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-01 01:01:52,572 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:01:52,572 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 38, 37, 1, 1, 1, 1] [2018-10-01 01:01:52,572 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:01:52,572 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:01:52,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1257182007, now seen corresponding path program 74 times [2018-10-01 01:01:52,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:01:52,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:01:52,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:52,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:01:52,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:52,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:01:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:52,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:01:52,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:01:52,969 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:01:53,065 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:01:53,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:01:53,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:01:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2888 backedges. 1482 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:53,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:01:53,372 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2018-10-01 01:01:53,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-01 01:01:53,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-01 01:01:53,373 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:01:53,373 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand 44 states. [2018-10-01 01:01:55,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:01:55,223 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2018-10-01 01:01:55,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-01 01:01:55,223 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 156 [2018-10-01 01:01:55,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:01:55,225 INFO L225 Difference]: With dead ends: 165 [2018-10-01 01:01:55,225 INFO L226 Difference]: Without dead ends: 163 [2018-10-01 01:01:55,225 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-10-01 01:01:55,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-10-01 01:01:55,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2018-10-01 01:01:55,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-10-01 01:01:55,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2018-10-01 01:01:55,267 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 156 [2018-10-01 01:01:55,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:01:55,267 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2018-10-01 01:01:55,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-01 01:01:55,279 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2018-10-01 01:01:55,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-01 01:01:55,280 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:01:55,280 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1] [2018-10-01 01:01:55,280 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:01:55,280 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:01:55,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1266046205, now seen corresponding path program 75 times [2018-10-01 01:01:55,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:01:55,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:01:55,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:55,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:01:55,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:01:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:01:56,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:56,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:01:56,100 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:01:56,107 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:01:56,246 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-01 01:01:56,247 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:01:56,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:01:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2964 backedges. 1482 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:01:57,927 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:01:57,928 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 157 [2018-10-01 01:01:57,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 158 states [2018-10-01 01:01:57,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2018-10-01 01:01:57,929 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:01:57,929 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 158 states. [2018-10-01 01:02:12,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:02:12,702 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2018-10-01 01:02:12,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-01 01:02:12,702 INFO L78 Accepts]: Start accepts. Automaton has 158 states. Word has length 158 [2018-10-01 01:02:12,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:02:12,703 INFO L225 Difference]: With dead ends: 242 [2018-10-01 01:02:12,703 INFO L226 Difference]: Without dead ends: 161 [2018-10-01 01:02:12,703 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time [2018-10-01 01:02:12,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-01 01:02:12,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-01 01:02:12,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-01 01:02:12,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2018-10-01 01:02:12,738 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 158 [2018-10-01 01:02:12,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:02:12,738 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2018-10-01 01:02:12,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 158 states. [2018-10-01 01:02:12,738 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2018-10-01 01:02:12,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-01 01:02:12,739 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:02:12,739 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 39, 38, 1, 1, 1, 1] [2018-10-01 01:02:12,740 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:02:12,740 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:02:12,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1726082109, now seen corresponding path program 76 times [2018-10-01 01:02:12,740 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:02:12,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:02:12,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:12,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:02:12,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:13,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:02:13,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:02:13,159 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:02:13,251 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:02:13,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:02:13,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:02:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3042 backedges. 1560 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:13,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:02:13,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2018-10-01 01:02:13,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-01 01:02:13,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-01 01:02:13,565 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:02:13,565 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand 45 states. [2018-10-01 01:02:15,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:02:15,403 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2018-10-01 01:02:15,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-01 01:02:15,403 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 160 [2018-10-01 01:02:15,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:02:15,404 INFO L225 Difference]: With dead ends: 169 [2018-10-01 01:02:15,404 INFO L226 Difference]: Without dead ends: 167 [2018-10-01 01:02:15,404 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-10-01 01:02:15,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-10-01 01:02:15,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 163. [2018-10-01 01:02:15,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-10-01 01:02:15,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2018-10-01 01:02:15,443 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 160 [2018-10-01 01:02:15,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:02:15,443 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2018-10-01 01:02:15,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-01 01:02:15,443 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2018-10-01 01:02:15,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-01 01:02:15,444 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:02:15,444 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1] [2018-10-01 01:02:15,444 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:02:15,444 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:02:15,445 INFO L82 PathProgramCache]: Analyzing trace with hash 907582839, now seen corresponding path program 77 times [2018-10-01 01:02:15,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:02:15,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:02:15,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:15,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:02:15,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:16,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:02:16,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:02:16,408 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:02:16,554 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-01 01:02:16,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:02:16,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:02:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3120 backedges. 1560 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:18,394 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:02:18,394 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 161 [2018-10-01 01:02:18,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 162 states [2018-10-01 01:02:18,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2018-10-01 01:02:18,395 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:02:18,395 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 162 states. [2018-10-01 01:02:22,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:02:22,083 INFO L93 Difference]: Finished difference Result 248 states and 250 transitions. [2018-10-01 01:02:22,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-01 01:02:22,084 INFO L78 Accepts]: Start accepts. Automaton has 162 states. Word has length 162 [2018-10-01 01:02:22,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:02:22,084 INFO L225 Difference]: With dead ends: 248 [2018-10-01 01:02:22,084 INFO L226 Difference]: Without dead ends: 165 [2018-10-01 01:02:22,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s Time [2018-10-01 01:02:22,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-10-01 01:02:22,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-10-01 01:02:22,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-01 01:02:22,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2018-10-01 01:02:22,142 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 162 [2018-10-01 01:02:22,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:02:22,142 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2018-10-01 01:02:22,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 162 states. [2018-10-01 01:02:22,143 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2018-10-01 01:02:22,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-10-01 01:02:22,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:02:22,144 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 40, 39, 1, 1, 1, 1] [2018-10-01 01:02:22,144 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:02:22,144 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:02:22,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1818644047, now seen corresponding path program 78 times [2018-10-01 01:02:22,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:02:22,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:02:22,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:22,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:02:22,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:22,570 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:02:22,570 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:02:22,577 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:02:22,725 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2018-10-01 01:02:22,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:02:22,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:02:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3200 backedges. 1640 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:23,097 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:02:23,098 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2018-10-01 01:02:23,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-01 01:02:23,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-01 01:02:23,098 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:02:23,098 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 46 states. [2018-10-01 01:02:25,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:02:25,216 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2018-10-01 01:02:25,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-01 01:02:25,217 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 164 [2018-10-01 01:02:25,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:02:25,218 INFO L225 Difference]: With dead ends: 173 [2018-10-01 01:02:25,218 INFO L226 Difference]: Without dead ends: 171 [2018-10-01 01:02:25,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-10-01 01:02:25,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-01 01:02:25,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2018-10-01 01:02:25,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-01 01:02:25,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2018-10-01 01:02:25,257 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 164 [2018-10-01 01:02:25,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:02:25,257 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2018-10-01 01:02:25,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-01 01:02:25,257 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2018-10-01 01:02:25,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-01 01:02:25,258 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:02:25,258 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1] [2018-10-01 01:02:25,258 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:02:25,258 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:02:25,258 INFO L82 PathProgramCache]: Analyzing trace with hash 334812651, now seen corresponding path program 79 times [2018-10-01 01:02:25,259 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:02:25,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:02:25,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:25,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:02:25,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:26,383 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:02:26,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:02:26,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:02:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:26,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:02:28,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1640 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:28,368 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:02:28,369 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 165 [2018-10-01 01:02:28,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 166 states [2018-10-01 01:02:28,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2018-10-01 01:02:28,370 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:02:28,370 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 166 states. [2018-10-01 01:02:41,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:02:41,566 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2018-10-01 01:02:41,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-01 01:02:41,567 INFO L78 Accepts]: Start accepts. Automaton has 166 states. Word has length 166 [2018-10-01 01:02:41,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:02:41,567 INFO L225 Difference]: With dead ends: 254 [2018-10-01 01:02:41,567 INFO L226 Difference]: Without dead ends: 169 [2018-10-01 01:02:41,568 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s Time [2018-10-01 01:02:41,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-01 01:02:41,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-10-01 01:02:41,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-10-01 01:02:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2018-10-01 01:02:41,605 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 166 [2018-10-01 01:02:41,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:02:41,605 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2018-10-01 01:02:41,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has 166 states. [2018-10-01 01:02:41,605 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2018-10-01 01:02:41,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-01 01:02:41,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:02:41,606 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 41, 40, 1, 1, 1, 1] [2018-10-01 01:02:41,606 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:02:41,606 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:02:41,606 INFO L82 PathProgramCache]: Analyzing trace with hash -436388571, now seen corresponding path program 80 times [2018-10-01 01:02:41,606 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:02:41,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:02:41,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:41,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:02:41,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:42,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:02:42,023 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:02:42,029 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:02:42,134 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:02:42,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:02:42,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:02:42,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3362 backedges. 1722 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:42,462 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:02:42,462 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2018-10-01 01:02:42,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-01 01:02:42,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-01 01:02:42,463 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:02:42,463 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 47 states. [2018-10-01 01:02:44,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:02:44,400 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2018-10-01 01:02:44,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-01 01:02:44,400 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 168 [2018-10-01 01:02:44,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:02:44,402 INFO L225 Difference]: With dead ends: 177 [2018-10-01 01:02:44,402 INFO L226 Difference]: Without dead ends: 175 [2018-10-01 01:02:44,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-10-01 01:02:44,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-10-01 01:02:44,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2018-10-01 01:02:44,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-01 01:02:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2018-10-01 01:02:44,443 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 168 [2018-10-01 01:02:44,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:02:44,443 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2018-10-01 01:02:44,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-01 01:02:44,443 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2018-10-01 01:02:44,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-01 01:02:44,444 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:02:44,444 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1] [2018-10-01 01:02:44,444 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:02:44,444 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:02:44,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1537430623, now seen corresponding path program 81 times [2018-10-01 01:02:44,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:02:44,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:02:44,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:44,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:02:44,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:45,326 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:02:45,326 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:02:45,334 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:02:45,492 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-01 01:02:45,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:02:45,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:02:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1722 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:47,462 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:02:47,463 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 169 [2018-10-01 01:02:47,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 170 states [2018-10-01 01:02:47,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2018-10-01 01:02:47,464 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:02:47,464 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 170 states. [2018-10-01 01:02:58,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:02:58,870 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2018-10-01 01:02:58,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-01 01:02:58,870 INFO L78 Accepts]: Start accepts. Automaton has 170 states. Word has length 170 [2018-10-01 01:02:58,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:02:58,871 INFO L225 Difference]: With dead ends: 260 [2018-10-01 01:02:58,871 INFO L226 Difference]: Without dead ends: 173 [2018-10-01 01:02:58,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time [2018-10-01 01:02:58,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-01 01:02:58,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-10-01 01:02:58,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-01 01:02:58,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2018-10-01 01:02:58,911 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 170 [2018-10-01 01:02:58,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:02:58,911 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2018-10-01 01:02:58,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 170 states. [2018-10-01 01:02:58,911 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2018-10-01 01:02:58,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-01 01:02:58,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:02:58,912 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 42, 41, 1, 1, 1, 1] [2018-10-01 01:02:58,912 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:02:58,912 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:02:58,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1739485543, now seen corresponding path program 82 times [2018-10-01 01:02:58,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:02:58,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:02:58,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:58,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:02:58,913 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:02:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:02:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:59,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:02:59,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:02:59,325 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:02:59,432 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:02:59,432 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:02:59,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:02:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 1806 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:02:59,747 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:02:59,747 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2018-10-01 01:02:59,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-01 01:02:59,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-01 01:02:59,747 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:02:59,748 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand 48 states. [2018-10-01 01:03:01,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:03:01,884 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2018-10-01 01:03:01,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-01 01:03:01,885 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2018-10-01 01:03:01,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:03:01,886 INFO L225 Difference]: With dead ends: 181 [2018-10-01 01:03:01,886 INFO L226 Difference]: Without dead ends: 179 [2018-10-01 01:03:01,887 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-10-01 01:03:01,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-01 01:03:01,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-10-01 01:03:01,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-01 01:03:01,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2018-10-01 01:03:01,935 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 172 [2018-10-01 01:03:01,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:03:01,936 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2018-10-01 01:03:01,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-01 01:03:01,936 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2018-10-01 01:03:01,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-01 01:03:01,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:03:01,937 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1] [2018-10-01 01:03:01,937 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:03:01,937 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:03:01,937 INFO L82 PathProgramCache]: Analyzing trace with hash -903276333, now seen corresponding path program 83 times [2018-10-01 01:03:01,937 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:03:01,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:03:01,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:01,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:03:01,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:03:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:02,915 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:03:02,916 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:03:02,923 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:03:03,086 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-01 01:03:03,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:03:03,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:03:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3612 backedges. 1806 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:05,282 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:03:05,283 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 173 [2018-10-01 01:03:05,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 174 states [2018-10-01 01:03:05,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2018-10-01 01:03:05,284 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:03:05,284 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 174 states. [2018-10-01 01:03:18,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:03:18,552 INFO L93 Difference]: Finished difference Result 266 states and 268 transitions. [2018-10-01 01:03:18,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-01 01:03:18,552 INFO L78 Accepts]: Start accepts. Automaton has 174 states. Word has length 174 [2018-10-01 01:03:18,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:03:18,553 INFO L225 Difference]: With dead ends: 266 [2018-10-01 01:03:18,553 INFO L226 Difference]: Without dead ends: 177 [2018-10-01 01:03:18,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s Time [2018-10-01 01:03:18,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-01 01:03:18,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-10-01 01:03:18,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-10-01 01:03:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2018-10-01 01:03:18,595 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 174 [2018-10-01 01:03:18,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:03:18,595 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2018-10-01 01:03:18,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 174 states. [2018-10-01 01:03:18,595 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2018-10-01 01:03:18,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-10-01 01:03:18,596 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:03:18,596 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 43, 42, 1, 1, 1, 1] [2018-10-01 01:03:18,597 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:03:18,597 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:03:18,597 INFO L82 PathProgramCache]: Analyzing trace with hash 878421517, now seen corresponding path program 84 times [2018-10-01 01:03:18,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:03:18,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:03:18,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:18,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:03:18,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:03:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:19,053 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:03:19,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:03:19,065 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:03:19,229 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 44 check-sat command(s) [2018-10-01 01:03:19,229 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:03:19,234 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:03:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3698 backedges. 1892 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:19,554 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:03:19,554 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2018-10-01 01:03:19,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-01 01:03:19,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-01 01:03:19,555 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:03:19,555 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 49 states. [2018-10-01 01:03:21,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:03:21,617 INFO L93 Difference]: Finished difference Result 185 states and 186 transitions. [2018-10-01 01:03:21,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-01 01:03:21,617 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 176 [2018-10-01 01:03:21,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:03:21,618 INFO L225 Difference]: With dead ends: 185 [2018-10-01 01:03:21,618 INFO L226 Difference]: Without dead ends: 183 [2018-10-01 01:03:21,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-10-01 01:03:21,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-01 01:03:21,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2018-10-01 01:03:21,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-10-01 01:03:21,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2018-10-01 01:03:21,661 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 176 [2018-10-01 01:03:21,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:03:21,662 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2018-10-01 01:03:21,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-01 01:03:21,662 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2018-10-01 01:03:21,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-01 01:03:21,663 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:03:21,663 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1] [2018-10-01 01:03:21,663 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:03:21,663 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:03:21,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1945427129, now seen corresponding path program 85 times [2018-10-01 01:03:21,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:03:21,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:03:21,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:21,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:03:21,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:03:22,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:22,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:03:22,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:03:22,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:03:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:03:22,966 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:03:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3784 backedges. 1892 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:24,973 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:03:24,974 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 177 [2018-10-01 01:03:24,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 178 states [2018-10-01 01:03:24,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2018-10-01 01:03:24,976 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:03:24,976 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 178 states. [2018-10-01 01:03:39,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:03:39,714 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2018-10-01 01:03:39,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-01 01:03:39,714 INFO L78 Accepts]: Start accepts. Automaton has 178 states. Word has length 178 [2018-10-01 01:03:39,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:03:39,715 INFO L225 Difference]: With dead ends: 272 [2018-10-01 01:03:39,715 INFO L226 Difference]: Without dead ends: 181 [2018-10-01 01:03:39,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s Time [2018-10-01 01:03:39,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-01 01:03:39,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-01 01:03:39,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-01 01:03:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2018-10-01 01:03:39,755 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 178 [2018-10-01 01:03:39,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:03:39,756 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2018-10-01 01:03:39,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 178 states. [2018-10-01 01:03:39,756 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2018-10-01 01:03:39,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-10-01 01:03:39,756 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:03:39,756 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 44, 43, 1, 1, 1, 1] [2018-10-01 01:03:39,757 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:03:39,757 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:03:39,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1398834049, now seen corresponding path program 86 times [2018-10-01 01:03:39,757 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:03:39,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:03:39,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:39,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:03:39,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:03:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:40,222 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:03:40,222 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:03:40,229 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:03:40,342 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:03:40,343 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:03:40,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:03:40,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3872 backedges. 1980 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:40,690 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:03:40,690 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2018-10-01 01:03:40,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-01 01:03:40,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-01 01:03:40,691 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:03:40,691 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 50 states. [2018-10-01 01:03:43,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:03:43,084 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2018-10-01 01:03:43,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-01 01:03:43,084 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 180 [2018-10-01 01:03:43,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:03:43,085 INFO L225 Difference]: With dead ends: 189 [2018-10-01 01:03:43,085 INFO L226 Difference]: Without dead ends: 187 [2018-10-01 01:03:43,085 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-10-01 01:03:43,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-01 01:03:43,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2018-10-01 01:03:43,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-10-01 01:03:43,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2018-10-01 01:03:43,129 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 180 [2018-10-01 01:03:43,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:03:43,129 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2018-10-01 01:03:43,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-01 01:03:43,129 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2018-10-01 01:03:43,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-01 01:03:43,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:03:43,130 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1] [2018-10-01 01:03:43,130 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:03:43,130 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:03:43,131 INFO L82 PathProgramCache]: Analyzing trace with hash -45190213, now seen corresponding path program 87 times [2018-10-01 01:03:43,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:03:43,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:03:43,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:43,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:03:43,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:03:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:44,176 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:03:44,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:03:44,184 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:03:44,358 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-01 01:03:44,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:03:44,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:03:46,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3960 backedges. 1980 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:46,480 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:03:46,480 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 181 [2018-10-01 01:03:46,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 182 states [2018-10-01 01:03:46,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2018-10-01 01:03:46,482 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:03:46,483 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 182 states. [2018-10-01 01:03:58,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:03:58,913 INFO L93 Difference]: Finished difference Result 278 states and 280 transitions. [2018-10-01 01:03:58,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-01 01:03:58,913 INFO L78 Accepts]: Start accepts. Automaton has 182 states. Word has length 182 [2018-10-01 01:03:58,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:03:58,914 INFO L225 Difference]: With dead ends: 278 [2018-10-01 01:03:58,914 INFO L226 Difference]: Without dead ends: 185 [2018-10-01 01:03:58,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s Time [2018-10-01 01:03:58,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-10-01 01:03:58,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-10-01 01:03:58,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-01 01:03:58,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2018-10-01 01:03:58,962 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 182 [2018-10-01 01:03:58,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:03:58,962 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2018-10-01 01:03:58,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 182 states. [2018-10-01 01:03:58,963 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2018-10-01 01:03:58,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-01 01:03:58,963 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:03:58,963 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 45, 44, 1, 1, 1, 1] [2018-10-01 01:03:58,963 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:03:58,964 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:03:58,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1579493109, now seen corresponding path program 88 times [2018-10-01 01:03:58,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:03:58,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:03:58,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:58,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:03:58,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:03:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:03:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:03:59,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:03:59,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:03:59,627 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:03:59,747 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:03:59,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:03:59,752 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:04:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 2070 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:00,082 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:04:00,082 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2018-10-01 01:04:00,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-01 01:04:00,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-01 01:04:00,083 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:04:00,083 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand 51 states. [2018-10-01 01:04:02,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:04:02,174 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2018-10-01 01:04:02,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-01 01:04:02,174 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 184 [2018-10-01 01:04:02,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:04:02,175 INFO L225 Difference]: With dead ends: 193 [2018-10-01 01:04:02,176 INFO L226 Difference]: Without dead ends: 191 [2018-10-01 01:04:02,176 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-10-01 01:04:02,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-01 01:04:02,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2018-10-01 01:04:02,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-10-01 01:04:02,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2018-10-01 01:04:02,225 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 184 [2018-10-01 01:04:02,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:04:02,225 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2018-10-01 01:04:02,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-01 01:04:02,225 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2018-10-01 01:04:02,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-10-01 01:04:02,226 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:04:02,226 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1] [2018-10-01 01:04:02,226 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:04:02,226 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:04:02,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1769474607, now seen corresponding path program 89 times [2018-10-01 01:04:02,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:04:02,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:04:02,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:04:02,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:04:02,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:04:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:04:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:03,392 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:04:03,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:04:03,399 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:04:03,578 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-01 01:04:03,578 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:04:03,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:04:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4140 backedges. 2070 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:05,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:04:05,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 185 [2018-10-01 01:04:05,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 186 states [2018-10-01 01:04:05,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2018-10-01 01:04:05,627 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:04:05,627 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 186 states. [2018-10-01 01:04:19,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:04:19,327 INFO L93 Difference]: Finished difference Result 284 states and 286 transitions. [2018-10-01 01:04:19,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-01 01:04:19,327 INFO L78 Accepts]: Start accepts. Automaton has 186 states. Word has length 186 [2018-10-01 01:04:19,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:04:19,328 INFO L225 Difference]: With dead ends: 284 [2018-10-01 01:04:19,328 INFO L226 Difference]: Without dead ends: 189 [2018-10-01 01:04:19,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s Time [2018-10-01 01:04:19,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-01 01:04:19,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-10-01 01:04:19,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-01 01:04:19,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2018-10-01 01:04:19,384 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 186 [2018-10-01 01:04:19,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:04:19,384 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2018-10-01 01:04:19,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 186 states. [2018-10-01 01:04:19,384 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2018-10-01 01:04:19,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-01 01:04:19,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:04:19,385 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 46, 45, 1, 1, 1, 1] [2018-10-01 01:04:19,385 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:04:19,385 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:04:19,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1290702953, now seen corresponding path program 90 times [2018-10-01 01:04:19,386 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:04:19,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:04:19,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:04:19,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:04:19,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:04:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:04:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:19,866 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:04:19,866 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:04:19,875 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:04:20,054 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2018-10-01 01:04:20,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:04:20,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:04:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 2162 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:20,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:04:20,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2018-10-01 01:04:20,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-01 01:04:20,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-01 01:04:20,423 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:04:20,423 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 52 states. [2018-10-01 01:04:22,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:04:22,723 INFO L93 Difference]: Finished difference Result 197 states and 198 transitions. [2018-10-01 01:04:22,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-01 01:04:22,723 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 188 [2018-10-01 01:04:22,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:04:22,725 INFO L225 Difference]: With dead ends: 197 [2018-10-01 01:04:22,725 INFO L226 Difference]: Without dead ends: 195 [2018-10-01 01:04:22,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-10-01 01:04:22,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-01 01:04:22,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 191. [2018-10-01 01:04:22,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-01 01:04:22,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2018-10-01 01:04:22,784 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 188 [2018-10-01 01:04:22,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:04:22,784 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2018-10-01 01:04:22,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-01 01:04:22,784 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2018-10-01 01:04:22,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-10-01 01:04:22,785 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:04:22,785 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 1, 1, 1, 1] [2018-10-01 01:04:22,785 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:04:22,785 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:04:22,785 INFO L82 PathProgramCache]: Analyzing trace with hash -879958365, now seen corresponding path program 91 times [2018-10-01 01:04:22,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:04:22,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:04:22,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:04:22,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:04:22,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:04:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:04:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2162 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:24,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:04:24,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:04:24,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:04:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:04:24,164 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:04:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 2162 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:26,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:04:26,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 189 [2018-10-01 01:04:26,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 190 states [2018-10-01 01:04:26,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2018-10-01 01:04:26,249 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:04:26,249 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 190 states. [2018-10-01 01:04:44,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:04:44,045 INFO L93 Difference]: Finished difference Result 290 states and 292 transitions. [2018-10-01 01:04:44,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-01 01:04:44,045 INFO L78 Accepts]: Start accepts. Automaton has 190 states. Word has length 190 [2018-10-01 01:04:44,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:04:44,046 INFO L225 Difference]: With dead ends: 290 [2018-10-01 01:04:44,046 INFO L226 Difference]: Without dead ends: 193 [2018-10-01 01:04:44,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s Time [2018-10-01 01:04:44,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-10-01 01:04:44,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-10-01 01:04:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-10-01 01:04:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2018-10-01 01:04:44,095 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 190 [2018-10-01 01:04:44,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:04:44,096 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2018-10-01 01:04:44,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 190 states. [2018-10-01 01:04:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2018-10-01 01:04:44,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-01 01:04:44,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:04:44,096 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 47, 46, 1, 1, 1, 1] [2018-10-01 01:04:44,097 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:04:44,097 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:04:44,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1736556509, now seen corresponding path program 92 times [2018-10-01 01:04:44,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:04:44,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:04:44,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:04:44,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:04:44,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:04:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:04:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:44,609 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:04:44,609 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:04:44,617 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:04:44,735 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:04:44,735 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:04:44,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:04:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4418 backedges. 2256 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:45,091 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:04:45,092 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2018-10-01 01:04:45,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-01 01:04:45,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-01 01:04:45,092 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:04:45,093 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand 53 states. [2018-10-01 01:04:47,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:04:47,461 INFO L93 Difference]: Finished difference Result 201 states and 202 transitions. [2018-10-01 01:04:47,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-01 01:04:47,461 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 192 [2018-10-01 01:04:47,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:04:47,463 INFO L225 Difference]: With dead ends: 201 [2018-10-01 01:04:47,463 INFO L226 Difference]: Without dead ends: 199 [2018-10-01 01:04:47,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-10-01 01:04:47,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-01 01:04:47,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2018-10-01 01:04:47,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-01 01:04:47,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2018-10-01 01:04:47,513 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 192 [2018-10-01 01:04:47,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:04:47,513 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2018-10-01 01:04:47,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-01 01:04:47,513 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2018-10-01 01:04:47,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-10-01 01:04:47,514 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:04:47,514 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 1, 1, 1, 1] [2018-10-01 01:04:47,514 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:04:47,514 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:04:47,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1911420649, now seen corresponding path program 93 times [2018-10-01 01:04:47,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:04:47,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:04:47,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:04:47,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:04:47,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:04:47,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:04:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:48,631 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:04:48,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:04:48,638 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:04:48,834 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-01 01:04:48,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:04:48,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:04:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 2256 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:04:51,281 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:04:51,282 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 193 [2018-10-01 01:04:51,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 194 states [2018-10-01 01:04:51,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2018-10-01 01:04:51,284 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:04:51,284 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 194 states. [2018-10-01 01:05:06,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:05:06,382 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2018-10-01 01:05:06,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-01 01:05:06,382 INFO L78 Accepts]: Start accepts. Automaton has 194 states. Word has length 194 [2018-10-01 01:05:06,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:05:06,383 INFO L225 Difference]: With dead ends: 296 [2018-10-01 01:05:06,383 INFO L226 Difference]: Without dead ends: 197 [2018-10-01 01:05:06,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s Time [2018-10-01 01:05:06,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-10-01 01:05:06,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-10-01 01:05:06,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-01 01:05:06,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2018-10-01 01:05:06,434 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 194 [2018-10-01 01:05:06,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:05:06,434 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2018-10-01 01:05:06,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 194 states. [2018-10-01 01:05:06,434 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2018-10-01 01:05:06,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-01 01:05:06,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:05:06,435 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 48, 47, 1, 1, 1, 1] [2018-10-01 01:05:06,435 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:05:06,435 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:05:06,435 INFO L82 PathProgramCache]: Analyzing trace with hash 86226257, now seen corresponding path program 94 times [2018-10-01 01:05:06,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:05:06,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:05:06,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:05:06,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:05:06,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:05:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:05:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:05:06,962 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:05:06,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:05:06,970 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:05:07,098 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:05:07,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:05:07,103 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:05:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4608 backedges. 2352 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:05:07,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:05:07,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2018-10-01 01:05:07,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-01 01:05:07,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-01 01:05:07,482 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:05:07,482 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand 54 states. [2018-10-01 01:05:09,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:05:09,934 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2018-10-01 01:05:09,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-01 01:05:09,935 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 196 [2018-10-01 01:05:09,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:05:09,936 INFO L225 Difference]: With dead ends: 205 [2018-10-01 01:05:09,936 INFO L226 Difference]: Without dead ends: 203 [2018-10-01 01:05:09,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-10-01 01:05:09,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-10-01 01:05:09,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 199. [2018-10-01 01:05:09,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-10-01 01:05:09,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2018-10-01 01:05:09,989 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 196 [2018-10-01 01:05:09,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:05:09,990 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2018-10-01 01:05:09,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-01 01:05:09,990 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2018-10-01 01:05:09,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-01 01:05:09,991 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:05:09,991 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 1, 1, 1, 1] [2018-10-01 01:05:09,991 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:05:09,991 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:05:09,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1259106699, now seen corresponding path program 95 times [2018-10-01 01:05:09,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:05:09,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:05:09,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:05:09,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:05:09,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:05:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:05:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2352 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:05:11,107 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:05:11,107 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:05:11,118 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:05:11,315 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-01 01:05:11,315 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:05:11,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:05:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4704 backedges. 2352 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:05:13,520 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:05:13,521 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 197 [2018-10-01 01:05:13,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 198 states [2018-10-01 01:05:13,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2018-10-01 01:05:13,522 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:05:13,523 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 198 states. [2018-10-01 01:05:39,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:05:39,949 INFO L93 Difference]: Finished difference Result 302 states and 304 transitions. [2018-10-01 01:05:39,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-01 01:05:39,949 INFO L78 Accepts]: Start accepts. Automaton has 198 states. Word has length 198 [2018-10-01 01:05:39,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:05:39,950 INFO L225 Difference]: With dead ends: 302 [2018-10-01 01:05:39,950 INFO L226 Difference]: Without dead ends: 201 [2018-10-01 01:05:39,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s Time [2018-10-01 01:05:39,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-01 01:05:40,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-10-01 01:05:40,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-01 01:05:40,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2018-10-01 01:05:40,012 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 198 [2018-10-01 01:05:40,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:05:40,013 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2018-10-01 01:05:40,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 198 states. [2018-10-01 01:05:40,013 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2018-10-01 01:05:40,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-10-01 01:05:40,013 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:05:40,013 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 49, 48, 1, 1, 1, 1] [2018-10-01 01:05:40,014 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:05:40,014 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:05:40,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1285124293, now seen corresponding path program 96 times [2018-10-01 01:05:40,014 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:05:40,014 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:05:40,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:05:40,015 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:05:40,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:05:40,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:05:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:05:40,721 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:05:40,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:05:40,730 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:05:40,927 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 50 check-sat command(s) [2018-10-01 01:05:40,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:05:40,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:05:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4802 backedges. 2450 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:05:41,310 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:05:41,310 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2018-10-01 01:05:41,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-01 01:05:41,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-01 01:05:41,311 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:05:41,311 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand 55 states. [2018-10-01 01:05:43,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:05:43,886 INFO L93 Difference]: Finished difference Result 209 states and 210 transitions. [2018-10-01 01:05:43,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-01 01:05:43,886 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 200 [2018-10-01 01:05:43,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:05:43,887 INFO L225 Difference]: With dead ends: 209 [2018-10-01 01:05:43,887 INFO L226 Difference]: Without dead ends: 207 [2018-10-01 01:05:43,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-10-01 01:05:43,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-10-01 01:05:43,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 203. [2018-10-01 01:05:43,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-10-01 01:05:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2018-10-01 01:05:43,944 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 200 [2018-10-01 01:05:43,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:05:43,944 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2018-10-01 01:05:43,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-01 01:05:43,944 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2018-10-01 01:05:43,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-01 01:05:43,945 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:05:43,945 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 1, 1, 1, 1] [2018-10-01 01:05:43,945 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:05:43,945 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:05:43,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1946083329, now seen corresponding path program 97 times [2018-10-01 01:05:43,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:05:43,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:05:43,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:05:43,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:05:43,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:05:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:05:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:05:45,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:05:45,024 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:05:45,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:05:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:05:45,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:05:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2450 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:05:47,540 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:05:47,540 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 201 [2018-10-01 01:05:47,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 202 states [2018-10-01 01:05:47,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2018-10-01 01:05:47,542 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:05:47,542 INFO L87 Difference]: Start difference. First operand 203 states and 204 transitions. Second operand 202 states. [2018-10-01 01:06:06,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:06:06,524 INFO L93 Difference]: Finished difference Result 308 states and 310 transitions. [2018-10-01 01:06:06,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-01 01:06:06,524 INFO L78 Accepts]: Start accepts. Automaton has 202 states. Word has length 202 [2018-10-01 01:06:06,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:06:06,525 INFO L225 Difference]: With dead ends: 308 [2018-10-01 01:06:06,525 INFO L226 Difference]: Without dead ends: 205 [2018-10-01 01:06:06,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s Time [2018-10-01 01:06:06,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-10-01 01:06:06,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-10-01 01:06:06,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-01 01:06:06,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2018-10-01 01:06:06,580 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 202 [2018-10-01 01:06:06,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:06:06,581 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2018-10-01 01:06:06,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has 202 states. [2018-10-01 01:06:06,581 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2018-10-01 01:06:06,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-01 01:06:06,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:06:06,581 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 50, 49, 1, 1, 1, 1] [2018-10-01 01:06:06,582 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:06:06,582 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:06:06,582 INFO L82 PathProgramCache]: Analyzing trace with hash -198708679, now seen corresponding path program 98 times [2018-10-01 01:06:06,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:06:06,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:06:06,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:06:06,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:06:06,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:06:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:06:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:06:07,131 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:06:07,131 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:06:07,138 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:06:07,269 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:06:07,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:06:07,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:06:07,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5000 backedges. 2550 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:06:07,653 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:06:07,654 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2018-10-01 01:06:07,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-01 01:06:07,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-01 01:06:07,654 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:06:07,655 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand 56 states. [2018-10-01 01:06:10,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:06:10,015 INFO L93 Difference]: Finished difference Result 213 states and 214 transitions. [2018-10-01 01:06:10,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-01 01:06:10,015 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 204 [2018-10-01 01:06:10,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:06:10,016 INFO L225 Difference]: With dead ends: 213 [2018-10-01 01:06:10,016 INFO L226 Difference]: Without dead ends: 211 [2018-10-01 01:06:10,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-10-01 01:06:10,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-01 01:06:10,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 207. [2018-10-01 01:06:10,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-10-01 01:06:10,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2018-10-01 01:06:10,072 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 204 [2018-10-01 01:06:10,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:06:10,073 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2018-10-01 01:06:10,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-01 01:06:10,073 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2018-10-01 01:06:10,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-10-01 01:06:10,073 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:06:10,073 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 1, 1, 1, 1] [2018-10-01 01:06:10,074 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:06:10,074 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:06:10,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1980427149, now seen corresponding path program 99 times [2018-10-01 01:06:10,074 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:06:10,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:06:10,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:06:10,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:06:10,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:06:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:06:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2550 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:06:11,413 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:06:11,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:06:11,421 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:06:11,645 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-01 01:06:11,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:06:11,651 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:06:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2550 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:06:14,249 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:06:14,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 205 [2018-10-01 01:06:14,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 206 states [2018-10-01 01:06:14,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2018-10-01 01:06:14,252 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:06:14,252 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 206 states. [2018-10-01 01:06:28,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:06:28,392 INFO L93 Difference]: Finished difference Result 314 states and 316 transitions. [2018-10-01 01:06:28,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-01 01:06:28,392 INFO L78 Accepts]: Start accepts. Automaton has 206 states. Word has length 206 [2018-10-01 01:06:28,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:06:28,393 INFO L225 Difference]: With dead ends: 314 [2018-10-01 01:06:28,393 INFO L226 Difference]: Without dead ends: 209 [2018-10-01 01:06:28,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s Time [2018-10-01 01:06:28,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-01 01:06:28,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-10-01 01:06:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-01 01:06:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2018-10-01 01:06:28,454 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 206 [2018-10-01 01:06:28,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:06:28,454 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2018-10-01 01:06:28,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 206 states. [2018-10-01 01:06:28,454 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2018-10-01 01:06:28,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-01 01:06:28,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:06:28,455 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 51, 50, 1, 1, 1, 1] [2018-10-01 01:06:28,455 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:06:28,455 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:06:28,455 INFO L82 PathProgramCache]: Analyzing trace with hash 26491309, now seen corresponding path program 100 times [2018-10-01 01:06:28,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:06:28,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:06:28,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:06:28,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:06:28,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:06:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:06:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 2652 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:06:29,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:06:29,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:06:29,042 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:06:29,187 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:06:29,188 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:06:29,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:06:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 2652 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:06:29,669 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:06:29,670 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 56 [2018-10-01 01:06:29,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-01 01:06:29,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-01 01:06:29,671 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:06:29,671 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand 57 states. [2018-10-01 01:06:32,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:06:32,375 INFO L93 Difference]: Finished difference Result 217 states and 218 transitions. [2018-10-01 01:06:32,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-01 01:06:32,375 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 208 [2018-10-01 01:06:32,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:06:32,376 INFO L225 Difference]: With dead ends: 217 [2018-10-01 01:06:32,376 INFO L226 Difference]: Without dead ends: 215 [2018-10-01 01:06:32,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-10-01 01:06:32,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-10-01 01:06:32,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 211. [2018-10-01 01:06:32,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-01 01:06:32,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2018-10-01 01:06:32,437 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 208 [2018-10-01 01:06:32,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:06:32,437 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2018-10-01 01:06:32,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-01 01:06:32,437 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2018-10-01 01:06:32,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-10-01 01:06:32,438 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:06:32,438 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 1, 1, 1, 1] [2018-10-01 01:06:32,438 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:06:32,438 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:06:32,439 INFO L82 PathProgramCache]: Analyzing trace with hash -311603481, now seen corresponding path program 101 times [2018-10-01 01:06:32,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:06:32,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:06:32,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:06:32,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:06:32,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:06:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:06:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 2652 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:06:33,610 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:06:33,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:06:33,617 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:06:33,838 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-10-01 01:06:33,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:06:33,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:06:36,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5304 backedges. 2652 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:06:36,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:06:36,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 209 [2018-10-01 01:06:36,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 210 states [2018-10-01 01:06:36,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 210 interpolants. [2018-10-01 01:06:36,217 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:06:36,218 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand 210 states. [2018-10-01 01:06:49,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:06:49,681 INFO L93 Difference]: Finished difference Result 320 states and 322 transitions. [2018-10-01 01:06:49,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-01 01:06:49,682 INFO L78 Accepts]: Start accepts. Automaton has 210 states. Word has length 210 [2018-10-01 01:06:49,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:06:49,682 INFO L225 Difference]: With dead ends: 320 [2018-10-01 01:06:49,682 INFO L226 Difference]: Without dead ends: 213 [2018-10-01 01:06:49,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s Time [2018-10-01 01:06:49,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-10-01 01:06:49,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-10-01 01:06:49,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-10-01 01:06:49,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2018-10-01 01:06:49,743 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 210 [2018-10-01 01:06:49,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:06:49,743 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2018-10-01 01:06:49,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has 210 states. [2018-10-01 01:06:49,743 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2018-10-01 01:06:49,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-01 01:06:49,744 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:06:49,744 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 52, 51, 1, 1, 1, 1] [2018-10-01 01:06:49,744 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:06:49,744 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:06:49,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1977399519, now seen corresponding path program 102 times [2018-10-01 01:06:49,744 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:06:49,745 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:06:49,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:06:49,745 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:06:49,745 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:06:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:06:50,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5408 backedges. 2756 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:06:50,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:06:50,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:06:50,356 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:06:50,575 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 53 check-sat command(s) [2018-10-01 01:06:50,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:06:50,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:06:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5408 backedges. 2756 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:06:51,004 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:06:51,004 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 57 [2018-10-01 01:06:51,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-01 01:06:51,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-01 01:06:51,005 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:06:51,006 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand 58 states. [2018-10-01 01:06:53,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:06:53,689 INFO L93 Difference]: Finished difference Result 221 states and 222 transitions. [2018-10-01 01:06:53,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-01 01:06:53,689 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 212 [2018-10-01 01:06:53,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:06:53,690 INFO L225 Difference]: With dead ends: 221 [2018-10-01 01:06:53,690 INFO L226 Difference]: Without dead ends: 219 [2018-10-01 01:06:53,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-10-01 01:06:53,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-01 01:06:53,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2018-10-01 01:06:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-01 01:06:53,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2018-10-01 01:06:53,763 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 212 [2018-10-01 01:06:53,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:06:53,763 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2018-10-01 01:06:53,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-01 01:06:53,763 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2018-10-01 01:06:53,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-10-01 01:06:53,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:06:53,764 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 1, 1, 1, 1] [2018-10-01 01:06:53,764 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:06:53,764 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:06:53,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1905340581, now seen corresponding path program 103 times [2018-10-01 01:06:53,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:06:53,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:06:53,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:06:53,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:06:53,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:06:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:06:55,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 2756 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:06:55,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:06:55,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:06:55,019 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:06:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:06:55,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:06:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 5512 backedges. 2756 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:06:57,817 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:06:57,817 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 213 [2018-10-01 01:06:57,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 214 states [2018-10-01 01:06:57,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 214 interpolants. [2018-10-01 01:06:57,819 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:06:57,819 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand 214 states. [2018-10-01 01:07:14,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:07:14,123 INFO L93 Difference]: Finished difference Result 326 states and 328 transitions. [2018-10-01 01:07:14,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-01 01:07:14,123 INFO L78 Accepts]: Start accepts. Automaton has 214 states. Word has length 214 [2018-10-01 01:07:14,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:07:14,124 INFO L225 Difference]: With dead ends: 326 [2018-10-01 01:07:14,124 INFO L226 Difference]: Without dead ends: 217 [2018-10-01 01:07:14,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s Time [2018-10-01 01:07:14,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-10-01 01:07:14,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-10-01 01:07:14,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-10-01 01:07:14,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2018-10-01 01:07:14,197 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 214 [2018-10-01 01:07:14,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:07:14,197 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2018-10-01 01:07:14,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 214 states. [2018-10-01 01:07:14,197 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2018-10-01 01:07:14,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-10-01 01:07:14,198 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:07:14,198 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 53, 52, 1, 1, 1, 1] [2018-10-01 01:07:14,198 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:07:14,198 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:07:14,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1922701973, now seen corresponding path program 104 times [2018-10-01 01:07:14,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:07:14,198 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:07:14,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:07:14,199 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:07:14,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:07:14,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:07:14,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5618 backedges. 2862 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:07:14,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:07:14,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:07:14,819 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:07:14,954 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:07:14,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:07:14,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:07:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5618 backedges. 2862 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:07:15,351 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:07:15,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 58 [2018-10-01 01:07:15,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-01 01:07:15,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-01 01:07:15,352 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:07:15,352 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand 59 states. [2018-10-01 01:07:18,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:07:18,068 INFO L93 Difference]: Finished difference Result 225 states and 226 transitions. [2018-10-01 01:07:18,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-01 01:07:18,068 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 216 [2018-10-01 01:07:18,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:07:18,069 INFO L225 Difference]: With dead ends: 225 [2018-10-01 01:07:18,070 INFO L226 Difference]: Without dead ends: 223 [2018-10-01 01:07:18,070 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-10-01 01:07:18,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-01 01:07:18,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 219. [2018-10-01 01:07:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-10-01 01:07:18,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2018-10-01 01:07:18,144 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 216 [2018-10-01 01:07:18,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:07:18,145 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2018-10-01 01:07:18,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-01 01:07:18,145 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2018-10-01 01:07:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-01 01:07:18,146 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:07:18,146 INFO L375 BasicCegarLoop]: trace histogram [54, 54, 53, 53, 1, 1, 1, 1] [2018-10-01 01:07:18,146 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:07:18,146 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:07:18,146 INFO L82 PathProgramCache]: Analyzing trace with hash 880711119, now seen corresponding path program 105 times [2018-10-01 01:07:18,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:07:18,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:07:18,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:07:18,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:07:18,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:07:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:07:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2862 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:07:19,414 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:07:19,414 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:07:19,421 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:07:19,650 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-10-01 01:07:19,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:07:19,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:07:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5724 backedges. 2862 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:07:22,299 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:07:22,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 217 [2018-10-01 01:07:22,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 218 states [2018-10-01 01:07:22,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 218 interpolants. [2018-10-01 01:07:22,302 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:07:22,302 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand 218 states. [2018-10-01 01:07:46,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:07:46,193 INFO L93 Difference]: Finished difference Result 332 states and 334 transitions. [2018-10-01 01:07:46,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-01 01:07:46,193 INFO L78 Accepts]: Start accepts. Automaton has 218 states. Word has length 218 [2018-10-01 01:07:46,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:07:46,193 INFO L225 Difference]: With dead ends: 332 [2018-10-01 01:07:46,194 INFO L226 Difference]: Without dead ends: 221 [2018-10-01 01:07:46,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s Time [2018-10-01 01:07:46,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-01 01:07:46,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-10-01 01:07:46,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-01 01:07:46,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2018-10-01 01:07:46,259 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 218 [2018-10-01 01:07:46,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:07:46,259 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2018-10-01 01:07:46,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 218 states. [2018-10-01 01:07:46,259 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2018-10-01 01:07:46,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-10-01 01:07:46,260 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:07:46,260 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 54, 53, 1, 1, 1, 1] [2018-10-01 01:07:46,260 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:07:46,260 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:07:46,261 INFO L82 PathProgramCache]: Analyzing trace with hash 792572937, now seen corresponding path program 106 times [2018-10-01 01:07:46,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:07:46,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:07:46,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:07:46,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:07:46,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:07:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:07:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5832 backedges. 2970 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:07:46,884 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:07:46,884 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:07:46,891 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-01 01:07:47,034 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-01 01:07:47,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:07:47,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:07:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 5832 backedges. 2970 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:07:47,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:07:47,441 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 59 [2018-10-01 01:07:47,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-01 01:07:47,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-01 01:07:47,441 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:07:47,441 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand 60 states. [2018-10-01 01:07:50,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:07:50,282 INFO L93 Difference]: Finished difference Result 229 states and 230 transitions. [2018-10-01 01:07:50,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-10-01 01:07:50,282 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 220 [2018-10-01 01:07:50,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:07:50,283 INFO L225 Difference]: With dead ends: 229 [2018-10-01 01:07:50,283 INFO L226 Difference]: Without dead ends: 227 [2018-10-01 01:07:50,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-10-01 01:07:50,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-10-01 01:07:50,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 223. [2018-10-01 01:07:50,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-10-01 01:07:50,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2018-10-01 01:07:50,348 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 220 [2018-10-01 01:07:50,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:07:50,348 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2018-10-01 01:07:50,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-01 01:07:50,348 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2018-10-01 01:07:50,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-01 01:07:50,349 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:07:50,349 INFO L375 BasicCegarLoop]: trace histogram [55, 55, 54, 54, 1, 1, 1, 1] [2018-10-01 01:07:50,349 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:07:50,349 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:07:50,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1453433411, now seen corresponding path program 107 times [2018-10-01 01:07:50,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:07:50,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:07:50,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:07:50,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:07:50,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:07:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:07:51,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 2970 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:07:51,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:07:51,592 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:07:51,599 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-01 01:07:51,835 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-01 01:07:51,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:07:51,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:07:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 5940 backedges. 2970 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:07:54,659 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:07:54,659 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 221 [2018-10-01 01:07:54,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 222 states [2018-10-01 01:07:54,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 222 interpolants. [2018-10-01 01:07:54,661 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:07:54,662 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand 222 states. [2018-10-01 01:08:29,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:29,361 INFO L93 Difference]: Finished difference Result 338 states and 340 transitions. [2018-10-01 01:08:29,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-01 01:08:29,361 INFO L78 Accepts]: Start accepts. Automaton has 222 states. Word has length 222 [2018-10-01 01:08:29,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:29,362 INFO L225 Difference]: With dead ends: 338 [2018-10-01 01:08:29,362 INFO L226 Difference]: Without dead ends: 225 [2018-10-01 01:08:29,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6s Time [2018-10-01 01:08:29,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-10-01 01:08:29,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-10-01 01:08:29,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-10-01 01:08:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2018-10-01 01:08:29,429 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 222 [2018-10-01 01:08:29,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:29,429 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2018-10-01 01:08:29,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 222 states. [2018-10-01 01:08:29,429 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2018-10-01 01:08:29,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-10-01 01:08:29,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:29,430 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 55, 54, 1, 1, 1, 1] [2018-10-01 01:08:29,430 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:29,430 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:29,430 INFO L82 PathProgramCache]: Analyzing trace with hash -2083318915, now seen corresponding path program 108 times [2018-10-01 01:08:29,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:29,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:29,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:29,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:29,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 3080 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:30,045 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:30,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:30,052 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-01 01:08:30,289 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 56 check-sat command(s) [2018-10-01 01:08:30,289 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:08:30,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 3080 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:30,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:30,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58] total 60 [2018-10-01 01:08:30,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-01 01:08:30,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-01 01:08:30,704 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:30,704 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand 61 states. [2018-10-01 01:08:33,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:08:33,627 INFO L93 Difference]: Finished difference Result 233 states and 234 transitions. [2018-10-01 01:08:33,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-10-01 01:08:33,628 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 224 [2018-10-01 01:08:33,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:08:33,628 INFO L225 Difference]: With dead ends: 233 [2018-10-01 01:08:33,628 INFO L226 Difference]: Without dead ends: 231 [2018-10-01 01:08:33,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-10-01 01:08:33,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-01 01:08:33,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 227. [2018-10-01 01:08:33,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-10-01 01:08:33,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 228 transitions. [2018-10-01 01:08:33,696 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 228 transitions. Word has length 224 [2018-10-01 01:08:33,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:08:33,696 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 228 transitions. [2018-10-01 01:08:33,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-01 01:08:33,696 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 228 transitions. [2018-10-01 01:08:33,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-10-01 01:08:33,697 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:08:33,697 INFO L375 BasicCegarLoop]: trace histogram [56, 56, 55, 55, 1, 1, 1, 1] [2018-10-01 01:08:33,697 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:08:33,697 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:08:33,697 INFO L82 PathProgramCache]: Analyzing trace with hash -614665033, now seen corresponding path program 109 times [2018-10-01 01:08:33,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:08:33,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:08:33,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:33,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:08:33,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:08:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 3080 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:35,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:08:35,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:08:35,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:08:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:08:35,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:08:37,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6160 backedges. 3080 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:08:37,933 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:08:37,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 225 [2018-10-01 01:08:37,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 226 states [2018-10-01 01:08:37,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 226 interpolants. [2018-10-01 01:08:37,936 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:08:37,936 INFO L87 Difference]: Start difference. First operand 227 states and 228 transitions. Second operand 226 states. [2018-10-01 01:09:02,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:02,389 INFO L93 Difference]: Finished difference Result 344 states and 346 transitions. [2018-10-01 01:09:02,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-10-01 01:09:02,390 INFO L78 Accepts]: Start accepts. Automaton has 226 states. Word has length 226 [2018-10-01 01:09:02,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:02,390 INFO L225 Difference]: With dead ends: 344 [2018-10-01 01:09:02,390 INFO L226 Difference]: Without dead ends: 229 [2018-10-01 01:09:02,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7s Time [2018-10-01 01:09:02,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-10-01 01:09:02,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-10-01 01:09:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-10-01 01:09:02,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2018-10-01 01:09:02,458 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 226 [2018-10-01 01:09:02,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:02,458 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2018-10-01 01:09:02,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 226 states. [2018-10-01 01:09:02,458 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2018-10-01 01:09:02,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-01 01:09:02,459 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:02,459 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 56, 55, 1, 1, 1, 1] [2018-10-01 01:09:02,459 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:02,459 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:02,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1134508273, now seen corresponding path program 110 times [2018-10-01 01:09:02,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:02,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:02,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:02,460 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-01 01:09:02,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6272 backedges. 3192 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:03,154 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:03,154 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:03,161 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-01 01:09:03,304 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-01 01:09:03,304 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:03,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6272 backedges. 3192 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:03,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:03,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59] total 61 [2018-10-01 01:09:03,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-01 01:09:03,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-01 01:09:03,726 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:03,726 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand 62 states. [2018-10-01 01:09:06,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-01 01:09:06,576 INFO L93 Difference]: Finished difference Result 237 states and 238 transitions. [2018-10-01 01:09:06,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-10-01 01:09:06,576 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 228 [2018-10-01 01:09:06,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-01 01:09:06,576 INFO L225 Difference]: With dead ends: 237 [2018-10-01 01:09:06,577 INFO L226 Difference]: Without dead ends: 235 [2018-10-01 01:09:06,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time [2018-10-01 01:09:06,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-10-01 01:09:06,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 231. [2018-10-01 01:09:06,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-10-01 01:09:06,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2018-10-01 01:09:06,646 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 228 [2018-10-01 01:09:06,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-01 01:09:06,646 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2018-10-01 01:09:06,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-01 01:09:06,646 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2018-10-01 01:09:06,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-10-01 01:09:06,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-01 01:09:06,647 INFO L375 BasicCegarLoop]: trace histogram [57, 57, 56, 56, 1, 1, 1, 1] [2018-10-01 01:09:06,647 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-01 01:09:06,647 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-01 01:09:06,647 INFO L82 PathProgramCache]: Analyzing trace with hash -659190485, now seen corresponding path program 111 times [2018-10-01 01:09:06,647 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-01 01:09:06,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-01 01:09:06,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:06,648 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-01 01:09:06,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-01 01:09:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-01 01:09:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 3192 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:08,030 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-01 01:09:08,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-01 01:09:08,037 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-01 01:09:08,303 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-10-01 01:09:08,303 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-01 01:09:08,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-01 01:09:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6384 backedges. 3192 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-01 01:09:11,316 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-01 01:09:11,317 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 229 [2018-10-01 01:09:11,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 230 states [2018-10-01 01:09:11,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 230 interpolants. [2018-10-01 01:09:11,319 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-10-01 01:09:11,319 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand 230 states. Received shutdown request... [2018-10-01 01:09:19,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-01 01:09:19,338 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-01 01:09:19,342 WARN L206 ceAbstractionStarter]: Timeout [2018-10-01 01:09:19,343 INFO L202 PluginConnector]: Adding new model seq.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.10 01:09:19 BoogieIcfgContainer [2018-10-01 01:09:19,343 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-01 01:09:19,343 INFO L168 Benchmark]: Toolchain (without parser) took 773109.72 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -255.9 MB). Free memory was 1.5 GB in the beginning and 765.0 MB in the end (delta: 707.4 MB). Peak memory consumption was 451.6 MB. Max. memory is 7.1 GB. [2018-10-01 01:09:19,345 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.31 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 01:09:19,345 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 01:09:19,346 INFO L168 Benchmark]: Boogie Preprocessor took 25.38 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-01 01:09:19,347 INFO L168 Benchmark]: RCFGBuilder took 393.20 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-01 01:09:19,347 INFO L168 Benchmark]: TraceAbstraction took 772643.46 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -255.9 MB). Free memory was 1.5 GB in the beginning and 765.0 MB in the end (delta: 686.3 MB). Peak memory consumption was 430.4 MB. Max. memory is 7.1 GB. [2018-10-01 01:09:19,350 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.31 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.61 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.38 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 393.20 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 772643.46 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -255.9 MB). Free memory was 1.5 GB in the beginning and 765.0 MB in the end (delta: 686.3 MB). Peak memory consumption was 430.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 80). Cancelled while BasicCegarLoop was constructing difference of abstraction (231states) and FLOYD_HOARE automaton (currently 108 states, 230 states before enhancement), while ReachableStatesComputation was computing reachable states (307 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. TIMEOUT Result, 772.5s OverallTime, 113 OverallIterations, 57 TraceHistogramMax, 595.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2104 SDtfs, 1278 SDslu, 12207 SDs, 0 SdLazy, 135960 SolverSat, 7532 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 159.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23228 GetRequests, 11503 SyntacticMatches, 0 SemanticMatches, 11725 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 213.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=231occurred in iteration=112, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 3.1s AutomataMinimizationTime, 112 MinimizatonAttempts, 224 StatesRemovedByMinimization, 56 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.9s SsaConstructionTime, 11.0s SatisfiabilityAnalysisTime, 155.0s InterpolantComputationTime, 26654 NumberOfCodeBlocks, 26654 NumberOfCodeBlocksAsserted, 1856 NumberOfCheckSat, 26430 ConstructedInterpolants, 0 QuantifiedInterpolants, 20732937 SizeOfPredicates, 445 NumberOfNonLiveVariables, 53725 ConjunctsInSsa, 7048 ConjunctsInUnsatCore, 224 InterpolantComputations, 2 PerfectInterpolantSequences, 246846/487310 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/seq.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-01_01-09-19-362.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/seq.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-01_01-09-19-362.csv Completed graceful shutdown