java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LuxembourgOctopus.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-bd42740 [2018-09-23 21:36:44,153 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 21:36:44,155 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 21:36:44,166 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 21:36:44,167 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 21:36:44,168 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 21:36:44,169 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 21:36:44,171 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 21:36:44,172 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 21:36:44,173 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 21:36:44,174 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-23 21:36:44,174 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-23 21:36:44,175 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-23 21:36:44,176 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-23 21:36:44,177 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-23 21:36:44,178 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-23 21:36:44,179 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-23 21:36:44,181 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-23 21:36:44,182 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-23 21:36:44,184 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-23 21:36:44,185 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-23 21:36:44,186 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-23 21:36:44,188 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-23 21:36:44,197 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 21:36:44,223 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 21:36:44,223 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 21:36:44,224 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 21:36:44,224 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 21:36:44,225 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 21:36:44,225 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 21:36:44,225 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 21:36:44,226 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 21:36:44,226 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 21:36:44,227 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 21:36:44,227 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 21:36:44,227 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 21:36:44,227 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 21:36:44,227 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 21:36:44,228 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 21:36:44,228 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 21:36:44,228 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 21:36:44,228 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 21:36:44,229 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 21:36:44,230 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 21:36:44,230 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 21:36:44,230 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 21:36:44,230 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:36:44,230 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 21:36:44,231 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 21:36:44,231 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 21:36:44,231 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 21:36:44,231 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 21:36:44,231 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 21:36:44,232 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 21:36:44,291 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 21:36:44,305 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 21:36:44,311 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 21:36:44,313 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 21:36:44,314 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 21:36:44,315 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LuxembourgOctopus.bpl [2018-09-23 21:36:44,315 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LuxembourgOctopus.bpl' [2018-09-23 21:36:44,366 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 21:36:44,370 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 21:36:44,370 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 21:36:44,371 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 21:36:44,371 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 21:36:44,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:36:44" (1/1) ... [2018-09-23 21:36:44,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:36:44" (1/1) ... [2018-09-23 21:36:44,413 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 21:36:44,413 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 21:36:44,413 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 21:36:44,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 21:36:44,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 21:36:44,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 21:36:44,416 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 21:36:44,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:36:44" (1/1) ... [2018-09-23 21:36:44,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:36:44" (1/1) ... [2018-09-23 21:36:44,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:36:44" (1/1) ... [2018-09-23 21:36:44,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:36:44" (1/1) ... [2018-09-23 21:36:44,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:36:44" (1/1) ... [2018-09-23 21:36:44,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:36:44" (1/1) ... [2018-09-23 21:36:44,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:36:44" (1/1) ... [2018-09-23 21:36:44,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 21:36:44,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 21:36:44,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 21:36:44,439 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 21:36:44,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:36:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:36:44,515 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-23 21:36:44,515 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-23 21:36:44,515 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-23 21:36:44,675 INFO L351 CfgBuilder]: Using library mode [2018-09-23 21:36:44,675 INFO L202 PluginConnector]: Adding new model LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:36:44 BoogieIcfgContainer [2018-09-23 21:36:44,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 21:36:44,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 21:36:44,676 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 21:36:44,680 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 21:36:44,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:36:44" (1/2) ... [2018-09-23 21:36:44,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5206a2 and model type LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 09:36:44, skipping insertion in model container [2018-09-23 21:36:44,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:36:44" (2/2) ... [2018-09-23 21:36:44,683 INFO L112 eAbstractionObserver]: Analyzing ICFG LuxembourgOctopus.bpl [2018-09-23 21:36:44,693 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 21:36:44,701 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 21:36:44,750 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 21:36:44,750 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 21:36:44,751 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 21:36:44,751 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 21:36:44,751 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 21:36:44,751 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 21:36:44,751 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 21:36:44,751 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 21:36:44,751 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 21:36:44,764 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-23 21:36:44,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-23 21:36:44,770 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:44,773 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-23 21:36:44,774 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:44,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:44,780 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-09-23 21:36:44,782 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:44,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:44,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:44,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:44,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:44,906 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:36:44,906 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 21:36:44,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:36:44,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:36:44,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:36:44,927 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-23 21:36:44,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:44,967 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-23 21:36:44,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:36:44,971 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-23 21:36:44,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:44,983 INFO L225 Difference]: With dead ends: 13 [2018-09-23 21:36:44,983 INFO L226 Difference]: Without dead ends: 5 [2018-09-23 21:36:44,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:36:45,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-23 21:36:45,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-23 21:36:45,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-23 21:36:45,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-23 21:36:45,040 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-23 21:36:45,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:45,041 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-23 21:36:45,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:36:45,041 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-23 21:36:45,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 21:36:45,042 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:45,042 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-23 21:36:45,043 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:45,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:45,044 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-09-23 21:36:45,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:45,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:45,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:45,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:45,046 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:45,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:45,172 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:45,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:45,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:45,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:45,281 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:45,281 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2018-09-23 21:36:45,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 21:36:45,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 21:36:45,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:36:45,283 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-09-23 21:36:45,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:45,381 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-23 21:36:45,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 21:36:45,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-23 21:36:45,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:45,383 INFO L225 Difference]: With dead ends: 8 [2018-09-23 21:36:45,383 INFO L226 Difference]: Without dead ends: 6 [2018-09-23 21:36:45,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:36:45,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-23 21:36:45,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-23 21:36:45,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-23 21:36:45,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-23 21:36:45,386 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-23 21:36:45,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:45,387 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-23 21:36:45,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 21:36:45,387 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-23 21:36:45,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 21:36:45,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:45,388 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-23 21:36:45,388 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:45,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:45,389 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-09-23 21:36:45,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:45,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:45,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:45,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:45,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:45,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:45,636 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:45,636 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:45,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:36:45,670 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:36:45,670 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:45,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:45,707 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:45,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-09-23 21:36:45,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 21:36:45,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 21:36:45,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:36:45,709 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-23 21:36:45,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:45,758 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-23 21:36:45,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:36:45,759 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-23 21:36:45,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:45,760 INFO L225 Difference]: With dead ends: 9 [2018-09-23 21:36:45,760 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 21:36:45,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 21:36:45,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 21:36:45,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 21:36:45,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 21:36:45,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-23 21:36:45,764 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-23 21:36:45,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:45,765 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-23 21:36:45,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 21:36:45,765 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-23 21:36:45,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 21:36:45,766 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:45,766 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-23 21:36:45,766 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:45,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:45,767 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-09-23 21:36:45,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:45,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:45,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:45,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:45,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:45,888 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:45,888 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:45,905 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:36:45,956 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 21:36:45,956 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:45,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:46,011 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:46,011 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-09-23 21:36:46,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 21:36:46,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 21:36:46,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:36:46,013 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-09-23 21:36:46,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:46,081 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-23 21:36:46,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 21:36:46,082 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-09-23 21:36:46,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:46,082 INFO L225 Difference]: With dead ends: 10 [2018-09-23 21:36:46,082 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 21:36:46,083 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:36:46,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 21:36:46,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 21:36:46,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 21:36:46,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-23 21:36:46,086 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-23 21:36:46,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:46,087 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-23 21:36:46,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 21:36:46,087 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-23 21:36:46,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 21:36:46,088 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:46,088 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-23 21:36:46,088 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:46,089 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:46,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-09-23 21:36:46,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:46,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:46,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:46,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:46,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:46,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:46,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:46,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:46,358 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:36:46,370 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:36:46,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:46,372 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:46,420 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:46,420 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-09-23 21:36:46,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:36:46,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:36:46,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:36:46,422 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-23 21:36:46,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:46,475 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-23 21:36:46,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 21:36:46,477 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-23 21:36:46,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:46,477 INFO L225 Difference]: With dead ends: 11 [2018-09-23 21:36:46,478 INFO L226 Difference]: Without dead ends: 9 [2018-09-23 21:36:46,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:36:46,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-23 21:36:46,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-23 21:36:46,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 21:36:46,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-23 21:36:46,482 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-23 21:36:46,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:46,482 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-23 21:36:46,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:36:46,483 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-23 21:36:46,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 21:36:46,483 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:46,483 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-23 21:36:46,484 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:46,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:46,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-09-23 21:36:46,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:46,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:46,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:46,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:46,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:46,708 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:46,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:46,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:46,720 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:36:46,733 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 21:36:46,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:46,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:46,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:46,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-09-23 21:36:46,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 21:36:46,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 21:36:46,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:36:46,786 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-09-23 21:36:46,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:46,823 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-23 21:36:46,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:36:46,824 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-09-23 21:36:46,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:46,824 INFO L225 Difference]: With dead ends: 12 [2018-09-23 21:36:46,824 INFO L226 Difference]: Without dead ends: 10 [2018-09-23 21:36:46,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 21:36:46,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-23 21:36:46,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-23 21:36:46,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-23 21:36:46,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-23 21:36:46,831 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-23 21:36:46,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:46,832 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-23 21:36:46,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 21:36:46,832 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-23 21:36:46,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 21:36:46,833 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:46,833 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-23 21:36:46,833 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:46,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:46,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-09-23 21:36:46,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:46,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:46,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:46,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:46,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:46,965 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:46,965 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:46,966 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:46,982 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:36:47,024 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-23 21:36:47,025 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:47,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:47,044 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:47,074 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:47,075 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-09-23 21:36:47,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:36:47,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:36:47,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:36:47,076 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-23 21:36:47,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:47,111 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-23 21:36:47,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:36:47,113 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-23 21:36:47,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:47,114 INFO L225 Difference]: With dead ends: 13 [2018-09-23 21:36:47,114 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 21:36:47,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:36:47,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 21:36:47,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 21:36:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 21:36:47,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-23 21:36:47,118 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-23 21:36:47,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:47,118 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-23 21:36:47,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:36:47,119 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-23 21:36:47,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 21:36:47,119 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:47,119 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-23 21:36:47,120 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:47,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:47,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-09-23 21:36:47,120 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:47,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:47,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:47,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:47,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:47,682 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:47,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:47,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:47,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:47,703 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:47,743 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:47,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-09-23 21:36:47,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 21:36:47,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 21:36:47,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:36:47,745 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-09-23 21:36:47,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:47,789 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-23 21:36:47,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:36:47,793 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-09-23 21:36:47,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:47,794 INFO L225 Difference]: With dead ends: 14 [2018-09-23 21:36:47,794 INFO L226 Difference]: Without dead ends: 12 [2018-09-23 21:36:47,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 21:36:47,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-23 21:36:47,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-23 21:36:47,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-23 21:36:47,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-23 21:36:47,799 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-23 21:36:47,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:47,799 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-23 21:36:47,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 21:36:47,799 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-23 21:36:47,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-23 21:36:47,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:47,800 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-23 21:36:47,800 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:47,800 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:47,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-09-23 21:36:47,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:47,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:47,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:47,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:47,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:47,974 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:47,974 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:47,983 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:36:47,993 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:36:47,993 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:47,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:48,050 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:48,051 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-09-23 21:36:48,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:36:48,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:36:48,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:36:48,052 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-23 21:36:48,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:48,092 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-23 21:36:48,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:36:48,095 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-23 21:36:48,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:48,095 INFO L225 Difference]: With dead ends: 15 [2018-09-23 21:36:48,096 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 21:36:48,096 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:36:48,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 21:36:48,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 21:36:48,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 21:36:48,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-23 21:36:48,100 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-23 21:36:48,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:48,101 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-23 21:36:48,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:36:48,101 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-23 21:36:48,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 21:36:48,101 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:48,102 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-23 21:36:48,102 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:48,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:48,102 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-09-23 21:36:48,102 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:48,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:48,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:48,104 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:48,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:48,278 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:48,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:48,279 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:48,288 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:36:48,326 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 21:36:48,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:48,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:48,365 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:48,365 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-09-23 21:36:48,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:36:48,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:36:48,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:36:48,366 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-09-23 21:36:48,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:48,408 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-23 21:36:48,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:36:48,409 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-23 21:36:48,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:48,410 INFO L225 Difference]: With dead ends: 16 [2018-09-23 21:36:48,410 INFO L226 Difference]: Without dead ends: 14 [2018-09-23 21:36:48,411 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:36:48,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-23 21:36:48,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-23 21:36:48,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 21:36:48,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-23 21:36:48,415 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-23 21:36:48,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:48,416 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-23 21:36:48,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:36:48,416 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-23 21:36:48,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 21:36:48,417 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:48,417 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-23 21:36:48,417 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:48,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:48,417 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-09-23 21:36:48,418 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:48,418 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:48,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:48,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:48,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:48,663 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:48,663 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:48,676 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:36:48,687 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:36:48,687 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:48,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:48,732 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:48,733 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-09-23 21:36:48,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:36:48,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:36:48,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:36:48,734 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-23 21:36:48,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:48,769 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-23 21:36:48,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:36:48,770 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-23 21:36:48,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:48,771 INFO L225 Difference]: With dead ends: 17 [2018-09-23 21:36:48,771 INFO L226 Difference]: Without dead ends: 15 [2018-09-23 21:36:48,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:36:48,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-23 21:36:48,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-23 21:36:48,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-23 21:36:48,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-23 21:36:48,775 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-23 21:36:48,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:48,776 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-23 21:36:48,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:36:48,776 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-23 21:36:48,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-23 21:36:48,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:48,777 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-23 21:36:48,777 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:48,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:48,777 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-09-23 21:36:48,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:48,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:48,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:48,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:48,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:48,955 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:48,955 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:48,964 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:36:48,983 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-23 21:36:48,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:48,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:49,032 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:49,033 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-09-23 21:36:49,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:36:49,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:36:49,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:36:49,036 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-09-23 21:36:49,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:49,104 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-23 21:36:49,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:36:49,105 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-23 21:36:49,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:49,105 INFO L225 Difference]: With dead ends: 18 [2018-09-23 21:36:49,106 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 21:36:49,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:36:49,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 21:36:49,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 21:36:49,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 21:36:49,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-23 21:36:49,109 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-23 21:36:49,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:49,110 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-23 21:36:49,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:36:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-23 21:36:49,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 21:36:49,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:49,111 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-23 21:36:49,111 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:49,111 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:49,111 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-09-23 21:36:49,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:49,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:49,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:49,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:49,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:49,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:49,433 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:49,433 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:49,447 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:36:49,465 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-23 21:36:49,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:49,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:49,511 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:49,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-09-23 21:36:49,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:36:49,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:36:49,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:36:49,513 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-23 21:36:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:49,589 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-23 21:36:49,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 21:36:49,590 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-23 21:36:49,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:49,590 INFO L225 Difference]: With dead ends: 19 [2018-09-23 21:36:49,590 INFO L226 Difference]: Without dead ends: 17 [2018-09-23 21:36:49,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:36:49,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-23 21:36:49,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-23 21:36:49,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-23 21:36:49,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-23 21:36:49,595 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-23 21:36:49,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:49,595 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-23 21:36:49,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:36:49,595 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-23 21:36:49,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 21:36:49,596 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:49,596 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-23 21:36:49,596 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:49,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:49,597 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-09-23 21:36:49,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:49,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:49,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:49,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:49,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:49,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:49,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:49,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:49,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:49,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:49,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:49,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-09-23 21:36:49,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 21:36:49,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 21:36:49,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:36:49,937 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-09-23 21:36:50,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:50,235 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-23 21:36:50,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 21:36:50,237 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-09-23 21:36:50,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:50,237 INFO L225 Difference]: With dead ends: 20 [2018-09-23 21:36:50,238 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 21:36:50,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 21:36:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 21:36:50,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-23 21:36:50,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-23 21:36:50,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-23 21:36:50,246 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-23 21:36:50,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:50,246 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-23 21:36:50,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 21:36:50,247 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-23 21:36:50,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-23 21:36:50,247 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:50,247 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-23 21:36:50,247 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:50,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:50,248 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-09-23 21:36:50,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:50,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:50,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:50,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:50,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:50,532 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:50,533 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:50,533 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:50,543 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:36:50,554 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:36:50,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:50,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:50,603 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:50,603 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-09-23 21:36:50,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:36:50,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:36:50,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:36:50,604 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-23 21:36:50,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:50,703 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-23 21:36:50,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 21:36:50,706 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-23 21:36:50,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:50,707 INFO L225 Difference]: With dead ends: 21 [2018-09-23 21:36:50,707 INFO L226 Difference]: Without dead ends: 19 [2018-09-23 21:36:50,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:36:50,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-23 21:36:50,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-23 21:36:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-23 21:36:50,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-23 21:36:50,712 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-23 21:36:50,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:50,712 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-23 21:36:50,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:36:50,713 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-23 21:36:50,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 21:36:50,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:50,713 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-23 21:36:50,714 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:50,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:50,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-09-23 21:36:50,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:50,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:50,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:50,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:50,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:50,994 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:50,994 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:51,002 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:36:51,123 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-23 21:36:51,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:51,126 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:51,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:51,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-09-23 21:36:51,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 21:36:51,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 21:36:51,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:36:51,290 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-09-23 21:36:51,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:51,624 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-23 21:36:51,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 21:36:51,625 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-09-23 21:36:51,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:51,627 INFO L225 Difference]: With dead ends: 22 [2018-09-23 21:36:51,628 INFO L226 Difference]: Without dead ends: 20 [2018-09-23 21:36:51,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:36:51,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-23 21:36:51,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-23 21:36:51,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-23 21:36:51,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-23 21:36:51,633 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-23 21:36:51,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:51,634 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-23 21:36:51,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 21:36:51,634 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-23 21:36:51,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-23 21:36:51,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:51,635 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-23 21:36:51,635 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:51,635 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:51,636 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-09-23 21:36:51,636 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:51,636 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:51,638 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:51,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:51,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:51,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:52,180 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:52,180 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:52,188 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:36:52,201 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:36:52,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:52,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:52,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:52,254 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-09-23 21:36:52,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:36:52,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:36:52,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:36:52,255 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-23 21:36:52,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:52,311 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-23 21:36:52,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 21:36:52,312 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-23 21:36:52,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:52,313 INFO L225 Difference]: With dead ends: 23 [2018-09-23 21:36:52,313 INFO L226 Difference]: Without dead ends: 21 [2018-09-23 21:36:52,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:36:52,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-23 21:36:52,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-23 21:36:52,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-23 21:36:52,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-23 21:36:52,318 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-23 21:36:52,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:52,319 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-23 21:36:52,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:36:52,319 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-23 21:36:52,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 21:36:52,320 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:52,320 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-23 21:36:52,320 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:52,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:52,320 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-09-23 21:36:52,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:52,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:52,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:52,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:52,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:52,707 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:52,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:52,717 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:36:52,799 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-23 21:36:52,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:52,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:52,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:52,926 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-09-23 21:36:52,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:36:52,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:36:52,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:36:52,927 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-09-23 21:36:52,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:52,983 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-23 21:36:52,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 21:36:52,986 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-09-23 21:36:52,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:52,987 INFO L225 Difference]: With dead ends: 24 [2018-09-23 21:36:52,987 INFO L226 Difference]: Without dead ends: 22 [2018-09-23 21:36:52,987 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:36:52,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-23 21:36:52,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-23 21:36:52,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-23 21:36:52,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-23 21:36:52,991 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-23 21:36:52,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:52,992 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-23 21:36:52,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 21:36:52,992 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-23 21:36:52,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 21:36:52,993 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:52,993 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-23 21:36:52,993 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:52,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:52,994 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-09-23 21:36:52,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:52,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:52,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:52,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:52,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:53,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:53,598 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:53,609 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:36:53,626 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-23 21:36:53,626 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:53,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:53,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:53,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-09-23 21:36:53,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:36:53,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:36:53,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:36:53,666 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-23 21:36:53,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:53,742 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-23 21:36:53,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 21:36:53,743 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-23 21:36:53,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:53,744 INFO L225 Difference]: With dead ends: 25 [2018-09-23 21:36:53,744 INFO L226 Difference]: Without dead ends: 23 [2018-09-23 21:36:53,745 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:36:53,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-23 21:36:53,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-23 21:36:53,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-23 21:36:53,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-23 21:36:53,749 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-23 21:36:53,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:53,750 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-23 21:36:53,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:36:53,750 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-23 21:36:53,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-23 21:36:53,751 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:53,751 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-23 21:36:53,751 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:53,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:53,751 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-09-23 21:36:53,752 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:53,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:53,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:53,753 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:53,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:53,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:54,173 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:54,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:54,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:54,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:54,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:54,229 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:54,252 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:54,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-09-23 21:36:54,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 21:36:54,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 21:36:54,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:36:54,253 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-09-23 21:36:54,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:54,292 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-23 21:36:54,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 21:36:54,293 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-09-23 21:36:54,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:54,294 INFO L225 Difference]: With dead ends: 26 [2018-09-23 21:36:54,294 INFO L226 Difference]: Without dead ends: 24 [2018-09-23 21:36:54,295 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:36:54,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-23 21:36:54,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-23 21:36:54,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-23 21:36:54,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-23 21:36:54,299 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-23 21:36:54,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:54,299 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-23 21:36:54,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 21:36:54,299 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-23 21:36:54,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 21:36:54,300 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:54,300 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-23 21:36:54,300 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:54,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:54,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-09-23 21:36:54,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:54,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:54,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:54,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:54,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:54,765 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:54,765 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) [2018-09-23 21:36:54,780 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:54,805 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:36:54,805 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:54,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:54,857 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:54,857 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-09-23 21:36:54,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 21:36:54,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 21:36:54,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:36:54,859 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-23 21:36:54,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:54,950 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-23 21:36:54,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 21:36:54,950 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-23 21:36:54,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:54,951 INFO L225 Difference]: With dead ends: 27 [2018-09-23 21:36:54,951 INFO L226 Difference]: Without dead ends: 25 [2018-09-23 21:36:54,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 21:36:54,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-23 21:36:54,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-23 21:36:54,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 21:36:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-23 21:36:54,956 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-23 21:36:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:54,956 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-23 21:36:54,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 21:36:54,957 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-23 21:36:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 21:36:54,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:54,958 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-23 21:36:54,958 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:54,958 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:54,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-09-23 21:36:54,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:54,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:54,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:54,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:54,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:55,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:55,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:55,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:36:55,379 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 21:36:55,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:55,381 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:55,429 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:55,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-09-23 21:36:55,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 21:36:55,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 21:36:55,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:36:55,430 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-09-23 21:36:55,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:55,517 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-23 21:36:55,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 21:36:55,520 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-09-23 21:36:55,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:55,520 INFO L225 Difference]: With dead ends: 28 [2018-09-23 21:36:55,520 INFO L226 Difference]: Without dead ends: 26 [2018-09-23 21:36:55,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 21:36:55,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-23 21:36:55,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-23 21:36:55,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-23 21:36:55,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-23 21:36:55,525 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-23 21:36:55,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:55,525 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-23 21:36:55,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 21:36:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-23 21:36:55,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-23 21:36:55,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:55,526 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-23 21:36:55,526 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:55,526 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:55,527 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-09-23 21:36:55,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:55,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:55,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:55,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:55,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:55,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:56,442 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:56,442 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:56,450 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:36:56,467 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:36:56,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:56,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:56,543 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:56,543 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-09-23 21:36:56,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 21:36:56,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 21:36:56,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:36:56,545 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-23 21:36:56,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:56,692 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-23 21:36:56,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 21:36:56,693 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-23 21:36:56,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:56,693 INFO L225 Difference]: With dead ends: 29 [2018-09-23 21:36:56,693 INFO L226 Difference]: Without dead ends: 27 [2018-09-23 21:36:56,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 21:36:56,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-23 21:36:56,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-23 21:36:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-23 21:36:56,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-23 21:36:56,698 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-23 21:36:56,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:56,699 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-23 21:36:56,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 21:36:56,699 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-23 21:36:56,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-23 21:36:56,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:56,700 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-23 21:36:56,700 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:56,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:56,701 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-09-23 21:36:56,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:56,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:56,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:56,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:56,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:56,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:57,549 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:57,549 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:57,565 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:36:57,666 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-23 21:36:57,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:57,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:57,722 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:57,723 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-09-23 21:36:57,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 21:36:57,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 21:36:57,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:36:57,724 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-09-23 21:36:57,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:57,811 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-23 21:36:57,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 21:36:57,811 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-09-23 21:36:57,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:57,812 INFO L225 Difference]: With dead ends: 30 [2018-09-23 21:36:57,812 INFO L226 Difference]: Without dead ends: 28 [2018-09-23 21:36:57,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 21:36:57,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-23 21:36:57,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-23 21:36:57,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-23 21:36:57,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-23 21:36:57,818 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-23 21:36:57,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:57,818 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-23 21:36:57,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 21:36:57,818 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-23 21:36:57,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-23 21:36:57,819 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:57,819 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-23 21:36:57,819 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:57,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:57,819 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-09-23 21:36:57,820 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:57,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:57,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:57,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:57,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:58,598 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:58,598 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:58,607 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:36:58,628 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-23 21:36:58,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:36:58,630 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:58,677 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:58,677 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-09-23 21:36:58,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 21:36:58,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 21:36:58,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:36:58,678 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-23 21:36:58,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:58,745 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-23 21:36:58,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 21:36:58,746 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-23 21:36:58,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:58,747 INFO L225 Difference]: With dead ends: 31 [2018-09-23 21:36:58,747 INFO L226 Difference]: Without dead ends: 29 [2018-09-23 21:36:58,748 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 21:36:58,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-23 21:36:58,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-23 21:36:58,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-23 21:36:58,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-23 21:36:58,752 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-23 21:36:58,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:58,752 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-23 21:36:58,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 21:36:58,753 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-23 21:36:58,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-23 21:36:58,753 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:58,753 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-23 21:36:58,754 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:58,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:58,754 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-09-23 21:36:58,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:58,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:58,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:58,755 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:36:58,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:58,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:59,491 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:59,492 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:36:59,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:36:59,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:36:59,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:36:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:36:59,569 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:36:59,569 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-09-23 21:36:59,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 21:36:59,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 21:36:59,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:36:59,570 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-09-23 21:36:59,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:36:59,741 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-23 21:36:59,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 21:36:59,742 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-09-23 21:36:59,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:36:59,742 INFO L225 Difference]: With dead ends: 32 [2018-09-23 21:36:59,742 INFO L226 Difference]: Without dead ends: 30 [2018-09-23 21:36:59,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:36:59,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-23 21:36:59,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-23 21:36:59,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 21:36:59,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-23 21:36:59,746 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-23 21:36:59,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:36:59,747 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-23 21:36:59,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 21:36:59,747 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-23 21:36:59,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 21:36:59,747 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:36:59,747 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-23 21:36:59,748 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:36:59,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:36:59,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-09-23 21:36:59,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:36:59,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:36:59,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:59,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:36:59,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:36:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:00,614 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:00,614 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:00,625 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:37:00,643 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:37:00,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:00,646 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:00,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:00,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-09-23 21:37:00,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 21:37:00,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 21:37:00,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:37:00,687 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-23 21:37:00,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:00,756 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-23 21:37:00,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 21:37:00,756 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-23 21:37:00,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:00,757 INFO L225 Difference]: With dead ends: 33 [2018-09-23 21:37:00,757 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 21:37:00,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 21:37:00,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 21:37:00,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-23 21:37:00,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-23 21:37:00,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-23 21:37:00,760 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-23 21:37:00,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:00,761 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-23 21:37:00,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 21:37:00,761 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-23 21:37:00,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-23 21:37:00,761 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:00,762 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-23 21:37:00,762 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:00,762 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:00,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-09-23 21:37:00,762 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:00,762 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:00,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:00,763 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:00,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:01,189 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:01,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:01,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:37:01,218 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-23 21:37:01,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:01,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:01,255 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:01,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-09-23 21:37:01,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 21:37:01,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 21:37:01,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:37:01,257 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-09-23 21:37:01,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:01,340 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-23 21:37:01,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 21:37:01,341 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-09-23 21:37:01,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:01,342 INFO L225 Difference]: With dead ends: 34 [2018-09-23 21:37:01,342 INFO L226 Difference]: Without dead ends: 32 [2018-09-23 21:37:01,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 21:37:01,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-23 21:37:01,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-23 21:37:01,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-23 21:37:01,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-23 21:37:01,347 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-23 21:37:01,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:01,347 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-23 21:37:01,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 21:37:01,347 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-23 21:37:01,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-23 21:37:01,348 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:01,348 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-23 21:37:01,348 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:01,348 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:01,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-09-23 21:37:01,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:01,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:01,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:01,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:01,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:02,165 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:02,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:02,179 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:37:02,202 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:37:02,202 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:02,204 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:02,247 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:02,247 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-09-23 21:37:02,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 21:37:02,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 21:37:02,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:37:02,248 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-23 21:37:02,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:02,457 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-23 21:37:02,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 21:37:02,458 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-23 21:37:02,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:02,458 INFO L225 Difference]: With dead ends: 35 [2018-09-23 21:37:02,458 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 21:37:02,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 21:37:02,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 21:37:02,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-23 21:37:02,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-23 21:37:02,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-23 21:37:02,464 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-23 21:37:02,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:02,464 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-23 21:37:02,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 21:37:02,465 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-23 21:37:02,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-23 21:37:02,465 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:02,465 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-23 21:37:02,465 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:02,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:02,466 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-09-23 21:37:02,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:02,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:02,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:02,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:02,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:03,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:03,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:03,050 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:37:03,079 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-23 21:37:03,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:03,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:03,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:03,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-09-23 21:37:03,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 21:37:03,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 21:37:03,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:37:03,133 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-09-23 21:37:03,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:03,237 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-23 21:37:03,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 21:37:03,238 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-09-23 21:37:03,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:03,239 INFO L225 Difference]: With dead ends: 36 [2018-09-23 21:37:03,239 INFO L226 Difference]: Without dead ends: 34 [2018-09-23 21:37:03,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 21:37:03,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-23 21:37:03,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-23 21:37:03,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-23 21:37:03,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-23 21:37:03,243 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-23 21:37:03,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:03,244 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-23 21:37:03,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 21:37:03,244 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-23 21:37:03,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-23 21:37:03,244 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:03,244 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-23 21:37:03,245 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:03,245 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:03,245 INFO L82 PathProgramCache]: Analyzing trace with hash -410989408, now seen corresponding path program 30 times [2018-09-23 21:37:03,245 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:03,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:03,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:03,246 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:03,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:03,883 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:03,883 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:03,893 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:37:03,917 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-23 21:37:03,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:03,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:04,002 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:04,003 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-09-23 21:37:04,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 21:37:04,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 21:37:04,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:37:04,004 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-23 21:37:04,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:04,143 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-23 21:37:04,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 21:37:04,143 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-23 21:37:04,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:04,143 INFO L225 Difference]: With dead ends: 37 [2018-09-23 21:37:04,143 INFO L226 Difference]: Without dead ends: 35 [2018-09-23 21:37:04,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 21:37:04,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-23 21:37:04,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-23 21:37:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-23 21:37:04,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-23 21:37:04,147 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-23 21:37:04,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:04,147 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-23 21:37:04,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 21:37:04,147 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-23 21:37:04,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-23 21:37:04,148 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:04,148 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-23 21:37:04,148 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:04,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:04,148 INFO L82 PathProgramCache]: Analyzing trace with hash 144226374, now seen corresponding path program 31 times [2018-09-23 21:37:04,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:04,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:04,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:04,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:04,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:04,729 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:04,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:04,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:04,759 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:04,793 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:04,793 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-09-23 21:37:04,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 21:37:04,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 21:37:04,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:37:04,795 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-09-23 21:37:04,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:04,880 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-23 21:37:04,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 21:37:04,880 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-09-23 21:37:04,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:04,881 INFO L225 Difference]: With dead ends: 38 [2018-09-23 21:37:04,881 INFO L226 Difference]: Without dead ends: 36 [2018-09-23 21:37:04,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 21:37:04,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-23 21:37:04,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-23 21:37:04,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 21:37:04,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-23 21:37:04,886 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-23 21:37:04,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:04,886 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-23 21:37:04,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 21:37:04,886 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-23 21:37:04,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-23 21:37:04,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:04,887 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-23 21:37:04,887 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:04,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:04,888 INFO L82 PathProgramCache]: Analyzing trace with hash 176046432, now seen corresponding path program 32 times [2018-09-23 21:37:04,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:04,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:04,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:04,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:04,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:04,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:05,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:05,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:05,727 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:37:05,746 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:37:05,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:05,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:05,781 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:05,781 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-09-23 21:37:05,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 21:37:05,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 21:37:05,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:37:05,782 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-23 21:37:05,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:05,841 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-23 21:37:05,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 21:37:05,842 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-23 21:37:05,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:05,842 INFO L225 Difference]: With dead ends: 39 [2018-09-23 21:37:05,842 INFO L226 Difference]: Without dead ends: 37 [2018-09-23 21:37:05,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 21:37:05,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-23 21:37:05,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-23 21:37:05,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-23 21:37:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-23 21:37:05,847 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-23 21:37:05,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:05,847 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-23 21:37:05,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 21:37:05,847 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-23 21:37:05,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-23 21:37:05,847 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:05,847 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-23 21:37:05,848 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:05,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:05,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468230, now seen corresponding path program 33 times [2018-09-23 21:37:05,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:05,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:05,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:05,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:05,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:05,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:07,350 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:07,350 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:07,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:07,358 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:37:07,386 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-23 21:37:07,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:07,388 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:07,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:07,424 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-09-23 21:37:07,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 21:37:07,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 21:37:07,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:37:07,425 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-09-23 21:37:07,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:07,479 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-23 21:37:07,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 21:37:07,480 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-09-23 21:37:07,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:07,480 INFO L225 Difference]: With dead ends: 40 [2018-09-23 21:37:07,480 INFO L226 Difference]: Without dead ends: 38 [2018-09-23 21:37:07,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 21:37:07,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-23 21:37:07,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-23 21:37:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 21:37:07,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-23 21:37:07,485 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-23 21:37:07,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:07,485 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-23 21:37:07,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 21:37:07,485 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-23 21:37:07,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-23 21:37:07,486 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:07,486 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-23 21:37:07,486 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:07,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:07,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772896, now seen corresponding path program 34 times [2018-09-23 21:37:07,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:07,486 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:07,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:07,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:07,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:08,102 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:08,102 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:08,102 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:08,109 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:37:08,134 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:37:08,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:08,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:08,188 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:08,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-09-23 21:37:08,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 21:37:08,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 21:37:08,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:37:08,190 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-23 21:37:09,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:09,085 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-23 21:37:09,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 21:37:09,085 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-23 21:37:09,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:09,086 INFO L225 Difference]: With dead ends: 41 [2018-09-23 21:37:09,086 INFO L226 Difference]: Without dead ends: 39 [2018-09-23 21:37:09,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 21:37:09,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-23 21:37:09,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-23 21:37:09,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-23 21:37:09,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-23 21:37:09,089 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-23 21:37:09,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:09,090 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-23 21:37:09,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 21:37:09,090 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-23 21:37:09,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-23 21:37:09,090 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:09,091 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-23 21:37:09,091 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:09,091 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:09,091 INFO L82 PathProgramCache]: Analyzing trace with hash 440348358, now seen corresponding path program 35 times [2018-09-23 21:37:09,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:09,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:09,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:09,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:09,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:09,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:10,465 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:10,465 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:10,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:10,487 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:37:10,515 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-23 21:37:10,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:10,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:10,546 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:10,568 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:10,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-09-23 21:37:10,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 21:37:10,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 21:37:10,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:37:10,570 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-09-23 21:37:10,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:10,642 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-23 21:37:10,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 21:37:10,643 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-09-23 21:37:10,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:10,643 INFO L225 Difference]: With dead ends: 42 [2018-09-23 21:37:10,644 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 21:37:10,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 21:37:10,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 21:37:10,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 21:37:10,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 21:37:10,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-23 21:37:10,647 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-23 21:37:10,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:10,648 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-23 21:37:10,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 21:37:10,648 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-23 21:37:10,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-23 21:37:10,648 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:10,648 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-23 21:37:10,648 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:10,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:10,649 INFO L82 PathProgramCache]: Analyzing trace with hash 765893344, now seen corresponding path program 36 times [2018-09-23 21:37:10,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:10,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:10,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:10,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:10,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:11,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:11,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:11,346 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:37:11,374 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-23 21:37:11,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:11,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:11,413 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:11,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-09-23 21:37:11,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 21:37:11,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 21:37:11,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:37:11,415 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-23 21:37:11,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:11,461 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-23 21:37:11,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 21:37:11,461 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-23 21:37:11,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:11,462 INFO L225 Difference]: With dead ends: 43 [2018-09-23 21:37:11,463 INFO L226 Difference]: Without dead ends: 41 [2018-09-23 21:37:11,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 21:37:11,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-23 21:37:11,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-23 21:37:11,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 21:37:11,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-23 21:37:11,467 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-23 21:37:11,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:11,467 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-23 21:37:11,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 21:37:11,468 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-23 21:37:11,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 21:37:11,468 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:11,468 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-23 21:37:11,468 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:11,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:11,469 INFO L82 PathProgramCache]: Analyzing trace with hash -2027113978, now seen corresponding path program 37 times [2018-09-23 21:37:11,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:11,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:11,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:11,470 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:11,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:12,391 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:12,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:12,398 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:12,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:12,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:12,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-09-23 21:37:12,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 21:37:12,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 21:37:12,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:37:12,482 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-09-23 21:37:12,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:12,550 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-23 21:37:12,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 21:37:12,551 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-09-23 21:37:12,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:12,551 INFO L225 Difference]: With dead ends: 44 [2018-09-23 21:37:12,552 INFO L226 Difference]: Without dead ends: 42 [2018-09-23 21:37:12,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 21:37:12,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-23 21:37:12,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-23 21:37:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-23 21:37:12,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-23 21:37:12,556 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-23 21:37:12,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:12,556 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-23 21:37:12,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 21:37:12,556 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-23 21:37:12,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-23 21:37:12,557 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:12,557 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-23 21:37:12,557 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:12,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:12,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972256, now seen corresponding path program 38 times [2018-09-23 21:37:12,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:12,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:12,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:12,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:12,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:13,267 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:13,267 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:13,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:37:13,318 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:37:13,319 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:13,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:13,374 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:13,374 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-09-23 21:37:13,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 21:37:13,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 21:37:13,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:37:13,376 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-23 21:37:13,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:13,441 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-23 21:37:13,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 21:37:13,441 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-23 21:37:13,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:13,442 INFO L225 Difference]: With dead ends: 45 [2018-09-23 21:37:13,442 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 21:37:13,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 21:37:13,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 21:37:13,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-23 21:37:13,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-23 21:37:13,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-23 21:37:13,447 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-23 21:37:13,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:13,447 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-23 21:37:13,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 21:37:13,447 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-23 21:37:13,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-23 21:37:13,447 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:13,448 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-23 21:37:13,448 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:13,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:13,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495814, now seen corresponding path program 39 times [2018-09-23 21:37:13,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:13,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:13,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:13,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:13,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:14,225 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:14,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:14,234 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:37:14,268 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-23 21:37:14,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:14,270 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:14,335 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:14,335 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-09-23 21:37:14,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 21:37:14,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 21:37:14,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:37:14,336 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-09-23 21:37:14,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:14,396 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-23 21:37:14,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 21:37:14,396 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-09-23 21:37:14,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:14,397 INFO L225 Difference]: With dead ends: 46 [2018-09-23 21:37:14,397 INFO L226 Difference]: Without dead ends: 44 [2018-09-23 21:37:14,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 21:37:14,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-23 21:37:14,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-23 21:37:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-23 21:37:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-23 21:37:14,401 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-23 21:37:14,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:14,401 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-23 21:37:14,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 21:37:14,401 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-23 21:37:14,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-23 21:37:14,402 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:14,402 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-23 21:37:14,402 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:14,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:14,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791520, now seen corresponding path program 40 times [2018-09-23 21:37:14,402 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:14,403 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:14,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:14,403 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:14,403 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:14,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:15,218 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:15,218 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:15,225 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:37:15,250 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:37:15,250 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:15,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:15,294 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:15,294 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-09-23 21:37:15,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 21:37:15,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 21:37:15,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:37:15,295 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-23 21:37:15,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:15,387 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-23 21:37:15,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 21:37:15,388 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-23 21:37:15,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:15,388 INFO L225 Difference]: With dead ends: 47 [2018-09-23 21:37:15,389 INFO L226 Difference]: Without dead ends: 45 [2018-09-23 21:37:15,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 21:37:15,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-23 21:37:15,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-23 21:37:15,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-23 21:37:15,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-23 21:37:15,392 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-23 21:37:15,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:15,392 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-23 21:37:15,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 21:37:15,393 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-23 21:37:15,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-23 21:37:15,393 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:15,393 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-23 21:37:15,393 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:15,393 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:15,393 INFO L82 PathProgramCache]: Analyzing trace with hash -692041594, now seen corresponding path program 41 times [2018-09-23 21:37:15,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:15,394 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:15,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:15,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:15,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:15,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:16,748 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:16,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:16,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:16,757 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:37:16,790 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-23 21:37:16,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:16,793 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:16,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:16,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-09-23 21:37:16,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 21:37:16,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 21:37:16,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:37:16,832 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-09-23 21:37:16,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:16,933 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-23 21:37:16,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 21:37:16,934 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-09-23 21:37:16,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:16,935 INFO L225 Difference]: With dead ends: 48 [2018-09-23 21:37:16,935 INFO L226 Difference]: Without dead ends: 46 [2018-09-23 21:37:16,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 21:37:16,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-23 21:37:16,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-23 21:37:16,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-23 21:37:16,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-23 21:37:16,938 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-23 21:37:16,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:16,939 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-23 21:37:16,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 21:37:16,939 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-23 21:37:16,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-23 21:37:16,939 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:16,939 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-23 21:37:16,939 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:16,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:16,940 INFO L82 PathProgramCache]: Analyzing trace with hash 21543200, now seen corresponding path program 42 times [2018-09-23 21:37:16,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:16,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:16,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:16,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:16,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:18,025 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:18,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:18,034 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:37:18,081 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-23 21:37:18,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:18,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:18,132 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:18,132 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-09-23 21:37:18,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 21:37:18,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 21:37:18,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:37:18,134 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-23 21:37:18,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:18,203 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-23 21:37:18,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 21:37:18,203 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-23 21:37:18,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:18,204 INFO L225 Difference]: With dead ends: 49 [2018-09-23 21:37:18,204 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 21:37:18,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 21:37:18,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 21:37:18,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 21:37:18,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 21:37:18,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-23 21:37:18,208 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-23 21:37:18,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:18,208 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-23 21:37:18,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 21:37:18,209 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-23 21:37:18,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 21:37:18,209 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:18,209 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-23 21:37:18,209 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:18,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:18,210 INFO L82 PathProgramCache]: Analyzing trace with hash 667835334, now seen corresponding path program 43 times [2018-09-23 21:37:18,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:18,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:18,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:18,210 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:18,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:19,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:19,152 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:19,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:19,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:19,224 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:19,225 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-09-23 21:37:19,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 21:37:19,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 21:37:19,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:37:19,226 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-09-23 21:37:19,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:19,340 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-23 21:37:19,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 21:37:19,341 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-09-23 21:37:19,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:19,341 INFO L225 Difference]: With dead ends: 50 [2018-09-23 21:37:19,341 INFO L226 Difference]: Without dead ends: 48 [2018-09-23 21:37:19,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 21:37:19,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-23 21:37:19,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-23 21:37:19,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-23 21:37:19,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-23 21:37:19,344 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-23 21:37:19,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:19,345 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-23 21:37:19,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 21:37:19,345 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-23 21:37:19,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-23 21:37:19,345 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:19,345 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-23 21:37:19,346 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:19,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:19,346 INFO L82 PathProgramCache]: Analyzing trace with hash -771944992, now seen corresponding path program 44 times [2018-09-23 21:37:19,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:19,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:19,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:19,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:19,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:20,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:20,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:20,513 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:37:20,538 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:37:20,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:20,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:20,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:20,583 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2018-09-23 21:37:20,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 21:37:20,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 21:37:20,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:37:20,584 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-23 21:37:20,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:20,667 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-23 21:37:20,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 21:37:20,667 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-23 21:37:20,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:20,668 INFO L225 Difference]: With dead ends: 51 [2018-09-23 21:37:20,668 INFO L226 Difference]: Without dead ends: 49 [2018-09-23 21:37:20,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 21:37:20,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-23 21:37:20,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-23 21:37:20,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-23 21:37:20,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-23 21:37:20,672 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-23 21:37:20,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:20,672 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-23 21:37:20,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 21:37:20,672 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-23 21:37:20,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-23 21:37:20,673 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:20,673 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-23 21:37:20,673 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:20,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:20,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505158, now seen corresponding path program 45 times [2018-09-23 21:37:20,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:20,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:20,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:20,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:20,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:21,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:21,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:21,683 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:37:21,719 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-23 21:37:21,719 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:21,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:21,782 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:21,783 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-09-23 21:37:21,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 21:37:21,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 21:37:21,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:37:21,784 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-09-23 21:37:22,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:22,354 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-23 21:37:22,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 21:37:22,354 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-09-23 21:37:22,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:22,354 INFO L225 Difference]: With dead ends: 52 [2018-09-23 21:37:22,354 INFO L226 Difference]: Without dead ends: 50 [2018-09-23 21:37:22,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 21:37:22,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-23 21:37:22,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-23 21:37:22,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-23 21:37:22,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-23 21:37:22,357 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-23 21:37:22,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:22,359 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-23 21:37:22,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 21:37:22,359 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-23 21:37:22,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-23 21:37:22,359 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:22,359 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-23 21:37:22,359 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:22,360 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:22,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081184, now seen corresponding path program 46 times [2018-09-23 21:37:22,360 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:22,360 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:22,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:22,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:22,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:23,732 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:23,732 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:23,739 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:37:23,770 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:37:23,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:23,772 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:23,821 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:23,821 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2018-09-23 21:37:23,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 21:37:23,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 21:37:23,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:37:23,822 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-23 21:37:24,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:24,090 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-23 21:37:24,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 21:37:24,090 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-23 21:37:24,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:24,091 INFO L225 Difference]: With dead ends: 53 [2018-09-23 21:37:24,093 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 21:37:24,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 21:37:24,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 21:37:24,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-23 21:37:24,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 21:37:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-23 21:37:24,095 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-23 21:37:24,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:24,096 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-23 21:37:24,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 21:37:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-23 21:37:24,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-23 21:37:24,096 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:24,096 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-23 21:37:24,097 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:24,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:24,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192826, now seen corresponding path program 47 times [2018-09-23 21:37:24,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:24,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:24,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:24,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:24,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:25,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:25,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:25,137 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:37:25,178 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-23 21:37:25,179 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:25,182 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:25,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:25,221 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-09-23 21:37:25,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 21:37:25,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 21:37:25,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:37:25,222 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-09-23 21:37:25,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:25,311 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-23 21:37:25,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 21:37:25,320 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-09-23 21:37:25,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:25,321 INFO L225 Difference]: With dead ends: 54 [2018-09-23 21:37:25,321 INFO L226 Difference]: Without dead ends: 52 [2018-09-23 21:37:25,321 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 21:37:25,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-23 21:37:25,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-23 21:37:25,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-23 21:37:25,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-23 21:37:25,324 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-23 21:37:25,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:25,324 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-23 21:37:25,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 21:37:25,324 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-23 21:37:25,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-23 21:37:25,325 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:25,325 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-23 21:37:25,325 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:25,325 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:25,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593376, now seen corresponding path program 48 times [2018-09-23 21:37:25,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:25,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:25,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:25,326 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:25,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:26,421 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:26,422 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:26,429 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:37:26,465 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-23 21:37:26,465 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:26,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:26,504 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:26,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2018-09-23 21:37:26,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 21:37:26,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 21:37:26,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:37:26,505 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-23 21:37:26,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:26,588 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-23 21:37:26,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 21:37:26,588 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-23 21:37:26,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:26,589 INFO L225 Difference]: With dead ends: 55 [2018-09-23 21:37:26,589 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 21:37:26,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 21:37:26,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 21:37:26,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 21:37:26,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 21:37:26,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-23 21:37:26,596 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-23 21:37:26,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:26,596 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-23 21:37:26,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 21:37:26,596 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-23 21:37:26,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 21:37:26,597 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:26,597 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-23 21:37:26,597 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:26,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:26,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1250314874, now seen corresponding path program 49 times [2018-09-23 21:37:26,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:26,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:26,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:26,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:26,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:28,586 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:28,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:28,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:28,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:28,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:28,664 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:28,664 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2018-09-23 21:37:28,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 21:37:28,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 21:37:28,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:37:28,665 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-09-23 21:37:28,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:28,760 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-23 21:37:28,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 21:37:28,761 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-09-23 21:37:28,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:28,761 INFO L225 Difference]: With dead ends: 56 [2018-09-23 21:37:28,762 INFO L226 Difference]: Without dead ends: 54 [2018-09-23 21:37:28,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:37:28,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-23 21:37:28,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-23 21:37:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 21:37:28,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-23 21:37:28,765 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-23 21:37:28,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:28,765 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-23 21:37:28,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 21:37:28,765 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-23 21:37:28,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 21:37:28,765 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:28,766 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-23 21:37:28,766 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:28,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:28,766 INFO L82 PathProgramCache]: Analyzing trace with hash -105059296, now seen corresponding path program 50 times [2018-09-23 21:37:28,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:28,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:28,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:28,767 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:28,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:30,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:30,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:30,025 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:37:30,077 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:37:30,078 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:30,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:30,214 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:30,214 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2018-09-23 21:37:30,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 21:37:30,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 21:37:30,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:37:30,215 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-23 21:37:30,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:30,340 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-23 21:37:30,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 21:37:30,340 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-23 21:37:30,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:30,341 INFO L225 Difference]: With dead ends: 57 [2018-09-23 21:37:30,341 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 21:37:30,342 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 21:37:30,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 21:37:30,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-23 21:37:30,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-23 21:37:30,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-23 21:37:30,345 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-23 21:37:30,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:30,345 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-23 21:37:30,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 21:37:30,346 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-23 21:37:30,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-23 21:37:30,346 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:30,346 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-23 21:37:30,346 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:30,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:30,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125254, now seen corresponding path program 51 times [2018-09-23 21:37:30,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:30,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:30,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:30,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:30,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:31,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:31,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:31,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:31,719 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:37:31,763 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-23 21:37:31,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:31,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:31,807 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:31,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2018-09-23 21:37:31,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 21:37:31,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 21:37:31,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:37:31,809 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-09-23 21:37:31,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:31,917 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-23 21:37:31,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 21:37:31,918 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-09-23 21:37:31,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:31,919 INFO L225 Difference]: With dead ends: 58 [2018-09-23 21:37:31,919 INFO L226 Difference]: Without dead ends: 56 [2018-09-23 21:37:31,920 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 21:37:31,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-23 21:37:31,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-23 21:37:31,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-23 21:37:31,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-23 21:37:31,923 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-23 21:37:31,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:31,924 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-23 21:37:31,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 21:37:31,924 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-23 21:37:31,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-23 21:37:31,924 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:31,924 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-23 21:37:31,925 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:31,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:31,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107936, now seen corresponding path program 52 times [2018-09-23 21:37:31,925 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:31,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:31,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:31,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:31,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:31,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:33,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:33,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:33,542 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:37:33,573 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:37:33,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:33,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:33,612 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:33,612 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2018-09-23 21:37:33,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 21:37:33,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 21:37:33,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:37:33,613 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-23 21:37:33,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:33,709 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-23 21:37:33,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 21:37:33,709 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-23 21:37:33,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:33,710 INFO L225 Difference]: With dead ends: 59 [2018-09-23 21:37:33,710 INFO L226 Difference]: Without dead ends: 57 [2018-09-23 21:37:33,711 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 21:37:33,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-23 21:37:33,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-23 21:37:33,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-23 21:37:33,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-23 21:37:33,713 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-23 21:37:33,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:33,713 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-23 21:37:33,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 21:37:33,713 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-23 21:37:33,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-23 21:37:33,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:33,714 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-23 21:37:33,714 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:33,714 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:33,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832710, now seen corresponding path program 53 times [2018-09-23 21:37:33,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:33,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:33,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:33,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:33,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:34,973 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:34,973 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:34,981 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:37:35,024 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-23 21:37:35,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:35,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:35,086 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:35,086 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2018-09-23 21:37:35,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 21:37:35,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 21:37:35,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:37:35,088 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-09-23 21:37:35,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:35,247 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-23 21:37:35,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 21:37:35,248 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-09-23 21:37:35,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:35,249 INFO L225 Difference]: With dead ends: 60 [2018-09-23 21:37:35,249 INFO L226 Difference]: Without dead ends: 58 [2018-09-23 21:37:35,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 21:37:35,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-23 21:37:35,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-23 21:37:35,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-23 21:37:35,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-23 21:37:35,252 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-23 21:37:35,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:35,252 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-23 21:37:35,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 21:37:35,253 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-23 21:37:35,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-23 21:37:35,253 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:35,253 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-23 21:37:35,253 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:35,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:35,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895520, now seen corresponding path program 54 times [2018-09-23 21:37:35,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:35,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:35,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:35,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:35,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:36,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:36,602 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:36,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:36,609 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:37:36,654 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-23 21:37:36,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:36,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:36,712 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:36,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2018-09-23 21:37:36,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 21:37:36,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 21:37:36,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:37:36,714 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-23 21:37:36,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:36,872 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-23 21:37:36,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 21:37:36,873 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-23 21:37:36,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:36,874 INFO L225 Difference]: With dead ends: 61 [2018-09-23 21:37:36,874 INFO L226 Difference]: Without dead ends: 59 [2018-09-23 21:37:36,874 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 21:37:36,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-23 21:37:36,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-23 21:37:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-23 21:37:36,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-23 21:37:36,878 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-23 21:37:36,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:36,878 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-23 21:37:36,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 21:37:36,878 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-23 21:37:36,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-23 21:37:36,879 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:36,879 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-23 21:37:36,879 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:36,879 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:36,879 INFO L82 PathProgramCache]: Analyzing trace with hash -836059322, now seen corresponding path program 55 times [2018-09-23 21:37:36,879 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:36,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:36,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:36,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:36,880 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:38,548 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:38,548 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:38,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:38,597 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:38,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:38,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2018-09-23 21:37:38,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 21:37:38,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 21:37:38,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:37:38,681 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-09-23 21:37:38,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:38,859 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-23 21:37:38,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 21:37:38,860 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-09-23 21:37:38,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:38,861 INFO L225 Difference]: With dead ends: 62 [2018-09-23 21:37:38,861 INFO L226 Difference]: Without dead ends: 60 [2018-09-23 21:37:38,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 21:37:38,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-23 21:37:38,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-23 21:37:38,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-23 21:37:38,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-23 21:37:38,865 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-23 21:37:38,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:38,865 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-23 21:37:38,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 21:37:38,866 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-23 21:37:38,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-23 21:37:38,866 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:38,866 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-23 21:37:38,867 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:38,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:38,867 INFO L82 PathProgramCache]: Analyzing trace with hash -148039072, now seen corresponding path program 56 times [2018-09-23 21:37:38,867 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:38,867 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:38,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:38,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:38,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:40,489 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:40,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:40,497 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:37:40,533 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:37:40,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:40,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:40,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:40,573 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2018-09-23 21:37:40,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 21:37:40,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 21:37:40,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:37:40,574 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-23 21:37:40,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:40,651 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-23 21:37:40,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 21:37:40,652 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-23 21:37:40,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:40,653 INFO L225 Difference]: With dead ends: 63 [2018-09-23 21:37:40,653 INFO L226 Difference]: Without dead ends: 61 [2018-09-23 21:37:40,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 21:37:40,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-23 21:37:40,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-23 21:37:40,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-23 21:37:40,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-23 21:37:40,657 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-23 21:37:40,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:40,658 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-23 21:37:40,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 21:37:40,658 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-23 21:37:40,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-23 21:37:40,658 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:40,658 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-23 21:37:40,659 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:40,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:40,659 INFO L82 PathProgramCache]: Analyzing trace with hash -294247802, now seen corresponding path program 57 times [2018-09-23 21:37:40,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:40,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:40,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:40,660 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:40,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:42,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:42,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:42,166 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:37:42,209 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-23 21:37:42,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:42,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:42,258 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:42,259 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2018-09-23 21:37:42,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 21:37:42,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 21:37:42,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:37:42,260 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-09-23 21:37:42,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:42,410 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-23 21:37:42,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 21:37:42,411 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-09-23 21:37:42,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:42,411 INFO L225 Difference]: With dead ends: 64 [2018-09-23 21:37:42,412 INFO L226 Difference]: Without dead ends: 62 [2018-09-23 21:37:42,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 21:37:42,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-23 21:37:42,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-23 21:37:42,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-23 21:37:42,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-23 21:37:42,415 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-23 21:37:42,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:42,415 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-23 21:37:42,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 21:37:42,416 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-23 21:37:42,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-23 21:37:42,416 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:42,416 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-23 21:37:42,416 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:42,416 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:42,417 INFO L82 PathProgramCache]: Analyzing trace with hash -531751136, now seen corresponding path program 58 times [2018-09-23 21:37:42,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:42,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:42,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:42,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:42,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:44,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:44,245 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:44,245 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:44,254 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:37:44,289 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:37:44,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:44,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:44,363 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:44,363 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2018-09-23 21:37:44,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 21:37:44,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 21:37:44,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:37:44,365 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-23 21:37:44,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:44,484 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-23 21:37:44,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 21:37:44,484 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-23 21:37:44,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:44,485 INFO L225 Difference]: With dead ends: 65 [2018-09-23 21:37:44,485 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 21:37:44,486 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 21:37:44,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 21:37:44,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-23 21:37:44,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-23 21:37:44,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-23 21:37:44,487 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-23 21:37:44,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:44,488 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-23 21:37:44,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 21:37:44,488 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-23 21:37:44,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-23 21:37:44,488 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:44,488 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-23 21:37:44,488 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:44,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:44,489 INFO L82 PathProgramCache]: Analyzing trace with hash 695580102, now seen corresponding path program 59 times [2018-09-23 21:37:44,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:44,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:44,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:44,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:44,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:46,101 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:46,101 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:46,108 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:37:46,157 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-23 21:37:46,157 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:46,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:46,211 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:46,212 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2018-09-23 21:37:46,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 21:37:46,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 21:37:46,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 21:37:46,213 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-09-23 21:37:46,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:46,360 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-23 21:37:46,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 21:37:46,361 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-09-23 21:37:46,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:46,362 INFO L225 Difference]: With dead ends: 66 [2018-09-23 21:37:46,362 INFO L226 Difference]: Without dead ends: 64 [2018-09-23 21:37:46,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 21:37:46,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-23 21:37:46,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-23 21:37:46,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-23 21:37:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-23 21:37:46,365 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-23 21:37:46,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:46,365 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-23 21:37:46,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 21:37:46,365 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-23 21:37:46,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-23 21:37:46,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:46,366 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-23 21:37:46,366 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:46,366 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:46,366 INFO L82 PathProgramCache]: Analyzing trace with hash 88142816, now seen corresponding path program 60 times [2018-09-23 21:37:46,366 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:46,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:46,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:46,367 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:46,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:50,095 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:50,095 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:50,107 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:37:50,156 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-23 21:37:50,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:50,159 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:50,203 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:50,203 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2018-09-23 21:37:50,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 21:37:50,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 21:37:50,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:37:50,204 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-23 21:37:50,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:50,309 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-23 21:37:50,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 21:37:50,309 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-23 21:37:50,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:50,310 INFO L225 Difference]: With dead ends: 67 [2018-09-23 21:37:50,310 INFO L226 Difference]: Without dead ends: 65 [2018-09-23 21:37:50,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 21:37:50,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-23 21:37:50,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-23 21:37:50,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-23 21:37:50,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-23 21:37:50,314 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-23 21:37:50,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:50,314 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-23 21:37:50,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 21:37:50,315 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-23 21:37:50,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-23 21:37:50,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:50,315 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-23 21:37:50,315 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:50,316 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:50,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543866, now seen corresponding path program 61 times [2018-09-23 21:37:50,316 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:50,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:50,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:50,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:50,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:52,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:52,237 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:52,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:52,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:52,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:52,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2018-09-23 21:37:52,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 21:37:52,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 21:37:52,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:37:52,319 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-09-23 21:37:52,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:52,425 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-23 21:37:52,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 21:37:52,425 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-09-23 21:37:52,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:52,426 INFO L225 Difference]: With dead ends: 68 [2018-09-23 21:37:52,426 INFO L226 Difference]: Without dead ends: 66 [2018-09-23 21:37:52,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 21:37:52,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-23 21:37:52,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-23 21:37:52,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-23 21:37:52,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-23 21:37:52,430 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-23 21:37:52,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:52,430 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-23 21:37:52,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 21:37:52,430 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-23 21:37:52,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-23 21:37:52,431 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:52,431 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-23 21:37:52,431 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:52,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:52,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223456, now seen corresponding path program 62 times [2018-09-23 21:37:52,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:52,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:52,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:52,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:37:52,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:57,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:57,405 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:37:57,412 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:37:57,449 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:37:57,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:37:57,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:37:57,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:57,499 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:37:57,499 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2018-09-23 21:37:57,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 21:37:57,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 21:37:57,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:37:57,500 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-23 21:37:57,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:37:57,726 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-23 21:37:57,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 21:37:57,727 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-23 21:37:57,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:37:57,728 INFO L225 Difference]: With dead ends: 69 [2018-09-23 21:37:57,728 INFO L226 Difference]: Without dead ends: 67 [2018-09-23 21:37:57,728 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 21:37:57,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-23 21:37:57,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-23 21:37:57,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-23 21:37:57,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-23 21:37:57,732 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-23 21:37:57,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:37:57,732 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-23 21:37:57,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 21:37:57,733 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-23 21:37:57,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-23 21:37:57,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:37:57,733 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-23 21:37:57,733 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:37:57,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:37:57,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774662, now seen corresponding path program 63 times [2018-09-23 21:37:57,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:37:57,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:37:57,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:57,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:37:57,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:37:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:37:59,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:37:59,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:37:59,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:00,009 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:38:00,121 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-23 21:38:00,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:00,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:00,175 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:00,175 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2018-09-23 21:38:00,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 21:38:00,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 21:38:00,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 21:38:00,176 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-09-23 21:38:00,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:00,295 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-23 21:38:00,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 21:38:00,304 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-09-23 21:38:00,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:00,304 INFO L225 Difference]: With dead ends: 70 [2018-09-23 21:38:00,304 INFO L226 Difference]: Without dead ends: 68 [2018-09-23 21:38:00,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 21:38:00,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-23 21:38:00,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-23 21:38:00,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-23 21:38:00,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-23 21:38:00,308 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-23 21:38:00,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:00,309 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-23 21:38:00,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 21:38:00,309 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-23 21:38:00,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-23 21:38:00,309 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:00,309 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-23 21:38:00,310 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:00,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:00,310 INFO L82 PathProgramCache]: Analyzing trace with hash -892596896, now seen corresponding path program 64 times [2018-09-23 21:38:00,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:00,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:00,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:00,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:00,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:02,449 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:02,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:02,458 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:38:02,497 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:38:02,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:02,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:02,552 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:02,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2018-09-23 21:38:02,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 21:38:02,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 21:38:02,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:38:02,553 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-23 21:38:02,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:02,689 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-23 21:38:02,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 21:38:02,690 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-23 21:38:02,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:02,690 INFO L225 Difference]: With dead ends: 71 [2018-09-23 21:38:02,691 INFO L226 Difference]: Without dead ends: 69 [2018-09-23 21:38:02,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 21:38:02,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-23 21:38:02,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-23 21:38:02,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-23 21:38:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-23 21:38:02,694 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-23 21:38:02,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:02,694 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-23 21:38:02,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 21:38:02,694 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-23 21:38:02,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-23 21:38:02,695 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:02,695 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-23 21:38:02,695 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:02,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:02,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703866, now seen corresponding path program 65 times [2018-09-23 21:38:02,695 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:02,695 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:02,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:02,696 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:02,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:04,817 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:04,817 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:04,824 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:38:04,878 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-23 21:38:04,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:04,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:04,922 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:04,923 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2018-09-23 21:38:04,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 21:38:04,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 21:38:04,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:38:04,924 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-09-23 21:38:05,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:05,051 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-23 21:38:05,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 21:38:05,051 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-09-23 21:38:05,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:05,052 INFO L225 Difference]: With dead ends: 72 [2018-09-23 21:38:05,052 INFO L226 Difference]: Without dead ends: 70 [2018-09-23 21:38:05,052 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 21:38:05,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-23 21:38:05,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-23 21:38:05,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 21:38:05,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-23 21:38:05,054 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-23 21:38:05,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:05,055 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-23 21:38:05,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 21:38:05,055 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-23 21:38:05,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-23 21:38:05,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:05,055 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-23 21:38:05,055 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:05,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:05,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718432, now seen corresponding path program 66 times [2018-09-23 21:38:05,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:05,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:05,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:05,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:05,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:06,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:06,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:06,967 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:38:07,022 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-23 21:38:07,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:07,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:07,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:07,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:07,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2018-09-23 21:38:07,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 21:38:07,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 21:38:07,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:38:07,152 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-23 21:38:07,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:07,297 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-23 21:38:07,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 21:38:07,298 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-23 21:38:07,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:07,299 INFO L225 Difference]: With dead ends: 73 [2018-09-23 21:38:07,299 INFO L226 Difference]: Without dead ends: 71 [2018-09-23 21:38:07,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 21:38:07,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-23 21:38:07,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-23 21:38:07,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-23 21:38:07,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-23 21:38:07,302 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-23 21:38:07,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:07,302 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-23 21:38:07,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 21:38:07,303 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-23 21:38:07,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-23 21:38:07,303 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:07,303 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-23 21:38:07,303 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:07,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:07,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438138, now seen corresponding path program 67 times [2018-09-23 21:38:07,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:07,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:07,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:07,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:07,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:09,528 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:09,529 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:09,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:38:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:09,578 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:09,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:09,624 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:09,625 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2018-09-23 21:38:09,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 21:38:09,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 21:38:09,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:38:09,626 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-09-23 21:38:09,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:09,747 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-23 21:38:09,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 21:38:09,747 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-09-23 21:38:09,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:09,748 INFO L225 Difference]: With dead ends: 74 [2018-09-23 21:38:09,748 INFO L226 Difference]: Without dead ends: 72 [2018-09-23 21:38:09,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 21:38:09,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-23 21:38:09,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-23 21:38:09,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-23 21:38:09,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-23 21:38:09,752 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-23 21:38:09,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:09,752 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-23 21:38:09,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 21:38:09,752 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-23 21:38:09,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-23 21:38:09,753 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:09,753 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-23 21:38:09,753 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:09,753 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:09,753 INFO L82 PathProgramCache]: Analyzing trace with hash 976119520, now seen corresponding path program 68 times [2018-09-23 21:38:09,753 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:09,753 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:09,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:09,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:38:09,754 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:11,711 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:11,711 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:11,718 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:38:11,757 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:38:11,758 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:11,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:11,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:11,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2018-09-23 21:38:11,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 21:38:11,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 21:38:11,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:38:11,815 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-23 21:38:12,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:12,163 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-23 21:38:12,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 21:38:12,164 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-23 21:38:12,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:12,165 INFO L225 Difference]: With dead ends: 75 [2018-09-23 21:38:12,165 INFO L226 Difference]: Without dead ends: 73 [2018-09-23 21:38:12,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 21:38:12,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-23 21:38:12,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-23 21:38:12,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 21:38:12,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-23 21:38:12,170 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-23 21:38:12,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:12,171 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-23 21:38:12,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 21:38:12,171 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-23 21:38:12,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-23 21:38:12,172 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:12,172 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-23 21:38:12,172 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:12,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:12,172 INFO L82 PathProgramCache]: Analyzing trace with hash 194930182, now seen corresponding path program 69 times [2018-09-23 21:38:12,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:12,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:12,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:12,173 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:12,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:12,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:14,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:14,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:14,534 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:38:14,608 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-23 21:38:14,609 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:14,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:14,750 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:14,750 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2018-09-23 21:38:14,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-23 21:38:14,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-23 21:38:14,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 21:38:14,751 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-09-23 21:38:16,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:16,075 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-23 21:38:16,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 21:38:16,075 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-09-23 21:38:16,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:16,076 INFO L225 Difference]: With dead ends: 76 [2018-09-23 21:38:16,076 INFO L226 Difference]: Without dead ends: 74 [2018-09-23 21:38:16,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 21:38:16,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-23 21:38:16,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-23 21:38:16,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-23 21:38:16,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-23 21:38:16,080 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-23 21:38:16,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:16,080 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-23 21:38:16,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-23 21:38:16,080 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-23 21:38:16,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-23 21:38:16,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:16,081 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-23 21:38:16,081 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:16,081 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:16,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864480, now seen corresponding path program 70 times [2018-09-23 21:38:16,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:16,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:16,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:16,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:16,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:16,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:18,203 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:18,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:18,213 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:38:18,252 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:38:18,252 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:18,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:18,304 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:18,304 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2018-09-23 21:38:18,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 21:38:18,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 21:38:18,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:38:18,306 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-23 21:38:18,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:18,474 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-23 21:38:18,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 21:38:18,474 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-23 21:38:18,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:18,475 INFO L225 Difference]: With dead ends: 77 [2018-09-23 21:38:18,475 INFO L226 Difference]: Without dead ends: 75 [2018-09-23 21:38:18,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 21:38:18,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-23 21:38:18,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-23 21:38:18,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-23 21:38:18,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-23 21:38:18,479 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-23 21:38:18,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:18,480 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-23 21:38:18,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 21:38:18,480 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-23 21:38:18,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-23 21:38:18,480 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:18,481 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-23 21:38:18,481 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:18,481 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:18,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779834, now seen corresponding path program 71 times [2018-09-23 21:38:18,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:18,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:18,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:18,482 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:18,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:20,899 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:20,899 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:20,906 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:38:20,968 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-23 21:38:20,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:20,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:21,043 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:21,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2018-09-23 21:38:21,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-23 21:38:21,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-23 21:38:21,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 21:38:21,045 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-09-23 21:38:21,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:21,293 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-23 21:38:21,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 21:38:21,294 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-09-23 21:38:21,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:21,295 INFO L225 Difference]: With dead ends: 78 [2018-09-23 21:38:21,295 INFO L226 Difference]: Without dead ends: 76 [2018-09-23 21:38:21,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 21:38:21,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-23 21:38:21,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-23 21:38:21,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-23 21:38:21,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-23 21:38:21,299 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-23 21:38:21,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:21,299 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-23 21:38:21,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-23 21:38:21,300 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-23 21:38:21,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-23 21:38:21,300 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:21,300 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-23 21:38:21,300 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:21,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:21,301 INFO L82 PathProgramCache]: Analyzing trace with hash 365428832, now seen corresponding path program 72 times [2018-09-23 21:38:21,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:21,301 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:21,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:21,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:21,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:23,651 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:23,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:23,657 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:38:23,726 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-23 21:38:23,727 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:23,730 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:23,808 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:23,808 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2018-09-23 21:38:23,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 21:38:23,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 21:38:23,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:38:23,809 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-23 21:38:23,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:23,968 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-23 21:38:23,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 21:38:23,968 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-23 21:38:23,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:23,969 INFO L225 Difference]: With dead ends: 79 [2018-09-23 21:38:23,969 INFO L226 Difference]: Without dead ends: 77 [2018-09-23 21:38:23,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 21:38:23,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-23 21:38:23,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-23 21:38:23,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 21:38:23,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-23 21:38:23,972 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-23 21:38:23,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:23,972 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-23 21:38:23,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 21:38:23,972 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-23 21:38:23,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 21:38:23,973 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:23,973 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-23 21:38:23,973 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:23,973 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:23,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1556611962, now seen corresponding path program 73 times [2018-09-23 21:38:23,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:23,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:23,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:23,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:23,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:26,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:26,296 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:26,296 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:26,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:38:26,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:26,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:26,394 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:26,394 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2018-09-23 21:38:26,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 21:38:26,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 21:38:26,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 21:38:26,395 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-09-23 21:38:26,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:26,567 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-23 21:38:26,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 21:38:26,567 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-09-23 21:38:26,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:26,568 INFO L225 Difference]: With dead ends: 80 [2018-09-23 21:38:26,568 INFO L226 Difference]: Without dead ends: 78 [2018-09-23 21:38:26,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 21:38:26,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-23 21:38:26,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-23 21:38:26,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-23 21:38:26,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-23 21:38:26,571 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-23 21:38:26,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:26,572 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-23 21:38:26,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 21:38:26,572 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-23 21:38:26,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-23 21:38:26,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:26,572 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-23 21:38:26,572 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:26,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:26,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334432, now seen corresponding path program 74 times [2018-09-23 21:38:26,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:26,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:26,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:26,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:38:26,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:29,215 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:29,215 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:29,222 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:38:29,266 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:38:29,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:29,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:29,309 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:29,309 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2018-09-23 21:38:29,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 21:38:29,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 21:38:29,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:38:29,310 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-23 21:38:29,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:29,463 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-23 21:38:29,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 21:38:29,464 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-23 21:38:29,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:29,464 INFO L225 Difference]: With dead ends: 81 [2018-09-23 21:38:29,465 INFO L226 Difference]: Without dead ends: 79 [2018-09-23 21:38:29,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 21:38:29,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-23 21:38:29,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-23 21:38:29,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-23 21:38:29,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-23 21:38:29,468 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-23 21:38:29,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:29,469 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-23 21:38:29,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 21:38:29,469 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-23 21:38:29,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-23 21:38:29,469 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:29,470 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-23 21:38:29,470 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:29,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:29,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600186, now seen corresponding path program 75 times [2018-09-23 21:38:29,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:29,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:29,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:29,471 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:29,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:31,872 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:31,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:31,879 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:38:31,951 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-23 21:38:31,951 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:31,954 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:32,040 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:32,040 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2018-09-23 21:38:32,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-23 21:38:32,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-23 21:38:32,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 21:38:32,041 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-09-23 21:38:32,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:32,164 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-23 21:38:32,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 21:38:32,164 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-09-23 21:38:32,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:32,165 INFO L225 Difference]: With dead ends: 82 [2018-09-23 21:38:32,165 INFO L226 Difference]: Without dead ends: 80 [2018-09-23 21:38:32,166 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-23 21:38:32,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-23 21:38:32,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-23 21:38:32,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-23 21:38:32,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-23 21:38:32,169 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-23 21:38:32,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:32,170 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-23 21:38:32,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-23 21:38:32,170 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-23 21:38:32,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-23 21:38:32,170 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:32,170 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-23 21:38:32,171 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:32,171 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:32,171 INFO L82 PathProgramCache]: Analyzing trace with hash -268903968, now seen corresponding path program 76 times [2018-09-23 21:38:32,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:32,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:32,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:32,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:32,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:34,914 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:34,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:34,920 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:38:34,967 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:38:34,968 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:34,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:35,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:35,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2018-09-23 21:38:35,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-23 21:38:35,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-23 21:38:35,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:38:35,013 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-23 21:38:36,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:36,186 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-23 21:38:36,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-23 21:38:36,186 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-23 21:38:36,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:36,187 INFO L225 Difference]: With dead ends: 83 [2018-09-23 21:38:36,187 INFO L226 Difference]: Without dead ends: 81 [2018-09-23 21:38:36,188 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-23 21:38:36,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-23 21:38:36,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-23 21:38:36,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-23 21:38:36,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-23 21:38:36,191 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-23 21:38:36,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:36,191 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-23 21:38:36,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-23 21:38:36,192 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-23 21:38:36,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-23 21:38:36,192 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:36,192 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-23 21:38:36,193 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:36,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:36,193 INFO L82 PathProgramCache]: Analyzing trace with hash 253907718, now seen corresponding path program 77 times [2018-09-23 21:38:36,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:36,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:36,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:36,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:36,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:39,332 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:39,332 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:39,339 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:38:39,407 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-23 21:38:39,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:39,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:39,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:39,459 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:39,459 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2018-09-23 21:38:39,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-23 21:38:39,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-23 21:38:39,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 21:38:39,461 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-09-23 21:38:39,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:39,589 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-23 21:38:39,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-23 21:38:39,590 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-09-23 21:38:39,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:39,591 INFO L225 Difference]: With dead ends: 84 [2018-09-23 21:38:39,591 INFO L226 Difference]: Without dead ends: 82 [2018-09-23 21:38:39,591 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-23 21:38:39,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-23 21:38:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-23 21:38:39,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-23 21:38:39,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-23 21:38:39,595 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-23 21:38:39,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:39,595 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-23 21:38:39,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-23 21:38:39,596 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-23 21:38:39,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-23 21:38:39,596 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:39,596 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-23 21:38:39,597 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:39,597 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:39,597 INFO L82 PathProgramCache]: Analyzing trace with hash -718799200, now seen corresponding path program 78 times [2018-09-23 21:38:39,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:39,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:39,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:39,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:39,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:42,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:42,146 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:42,146 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:42,154 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:38:42,220 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-23 21:38:42,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:42,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:42,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:42,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2018-09-23 21:38:42,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-23 21:38:42,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-23 21:38:42,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:38:42,290 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-23 21:38:42,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:42,410 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-23 21:38:42,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-23 21:38:42,410 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-23 21:38:42,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:42,411 INFO L225 Difference]: With dead ends: 85 [2018-09-23 21:38:42,411 INFO L226 Difference]: Without dead ends: 83 [2018-09-23 21:38:42,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 21:38:42,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-23 21:38:42,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-23 21:38:42,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-23 21:38:42,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-23 21:38:42,415 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-23 21:38:42,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:42,415 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-23 21:38:42,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-23 21:38:42,416 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-23 21:38:42,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-23 21:38:42,416 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:42,416 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-23 21:38:42,416 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:42,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:42,417 INFO L82 PathProgramCache]: Analyzing trace with hash -807942586, now seen corresponding path program 79 times [2018-09-23 21:38:42,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:42,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:42,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:42,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:42,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:45,318 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:45,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:45,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:38:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:45,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:45,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:45,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2018-09-23 21:38:45,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-23 21:38:45,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-23 21:38:45,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 21:38:45,466 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. [2018-09-23 21:38:45,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:45,588 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-23 21:38:45,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-23 21:38:45,589 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 82 [2018-09-23 21:38:45,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:45,589 INFO L225 Difference]: With dead ends: 86 [2018-09-23 21:38:45,590 INFO L226 Difference]: Without dead ends: 84 [2018-09-23 21:38:45,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-23 21:38:45,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-23 21:38:45,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-23 21:38:45,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-23 21:38:45,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-23 21:38:45,593 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-23 21:38:45,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:45,594 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-23 21:38:45,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-23 21:38:45,594 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-23 21:38:45,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-23 21:38:45,594 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:45,594 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-23 21:38:45,594 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:45,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:45,595 INFO L82 PathProgramCache]: Analyzing trace with hash 723579744, now seen corresponding path program 80 times [2018-09-23 21:38:45,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:45,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:45,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:45,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:38:45,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:48,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:48,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:48,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:48,713 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:38:48,759 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:38:48,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:48,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:48,869 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:48,870 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2018-09-23 21:38:48,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-23 21:38:48,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-23 21:38:48,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:38:48,871 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-23 21:38:49,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:49,712 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-23 21:38:49,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-23 21:38:49,713 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-23 21:38:49,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:49,713 INFO L225 Difference]: With dead ends: 87 [2018-09-23 21:38:49,714 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 21:38:49,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 21:38:49,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 21:38:49,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 21:38:49,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 21:38:49,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-23 21:38:49,717 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-23 21:38:49,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:49,717 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-23 21:38:49,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-23 21:38:49,718 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-23 21:38:49,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 21:38:49,718 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:49,718 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-23 21:38:49,718 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:49,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:49,718 INFO L82 PathProgramCache]: Analyzing trace with hash 956131718, now seen corresponding path program 81 times [2018-09-23 21:38:49,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:49,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:49,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:49,719 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:49,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:52,446 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:52,446 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:52,453 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:38:52,524 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-23 21:38:52,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:52,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:52,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:52,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2018-09-23 21:38:52,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-23 21:38:52,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-23 21:38:52,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 21:38:52,575 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 85 states. [2018-09-23 21:38:52,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:52,779 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-23 21:38:52,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-23 21:38:52,779 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 84 [2018-09-23 21:38:52,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:52,780 INFO L225 Difference]: With dead ends: 88 [2018-09-23 21:38:52,780 INFO L226 Difference]: Without dead ends: 86 [2018-09-23 21:38:52,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-23 21:38:52,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-23 21:38:52,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-23 21:38:52,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-23 21:38:52,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-23 21:38:52,783 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-23 21:38:52,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:52,783 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-23 21:38:52,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-23 21:38:52,784 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-23 21:38:52,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-23 21:38:52,784 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:52,785 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-23 21:38:52,785 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:52,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:52,785 INFO L82 PathProgramCache]: Analyzing trace with hash -424691680, now seen corresponding path program 82 times [2018-09-23 21:38:52,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:52,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:52,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:52,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:52,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:56,010 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:56,010 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:56,017 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:38:56,070 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:38:56,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:56,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:56,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:56,172 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2018-09-23 21:38:56,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-23 21:38:56,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-23 21:38:56,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 21:38:56,174 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-23 21:38:56,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:56,494 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-23 21:38:56,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-23 21:38:56,495 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-23 21:38:56,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:56,495 INFO L225 Difference]: With dead ends: 89 [2018-09-23 21:38:56,496 INFO L226 Difference]: Without dead ends: 87 [2018-09-23 21:38:56,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-23 21:38:56,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-23 21:38:56,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-23 21:38:56,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-23 21:38:56,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-23 21:38:56,499 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-23 21:38:56,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:56,499 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-23 21:38:56,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-23 21:38:56,499 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-23 21:38:56,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-23 21:38:56,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:56,500 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-23 21:38:56,500 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:56,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:56,500 INFO L82 PathProgramCache]: Analyzing trace with hash -280544058, now seen corresponding path program 83 times [2018-09-23 21:38:56,500 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:56,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:56,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:56,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:56,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:56,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:38:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:59,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:38:59,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:38:59,409 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:38:59,492 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-23 21:38:59,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:38:59,495 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:38:59,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:38:59,549 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:38:59,550 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2018-09-23 21:38:59,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-23 21:38:59,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-23 21:38:59,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 21:38:59,551 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 87 states. [2018-09-23 21:38:59,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:38:59,754 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-23 21:38:59,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-23 21:38:59,754 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 86 [2018-09-23 21:38:59,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:38:59,755 INFO L225 Difference]: With dead ends: 90 [2018-09-23 21:38:59,755 INFO L226 Difference]: Without dead ends: 88 [2018-09-23 21:38:59,755 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 21:38:59,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-23 21:38:59,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-23 21:38:59,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-23 21:38:59,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-23 21:38:59,759 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-23 21:38:59,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:38:59,759 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-23 21:38:59,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-23 21:38:59,759 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-23 21:38:59,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-23 21:38:59,759 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:38:59,759 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-23 21:38:59,760 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:38:59,760 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:38:59,760 INFO L82 PathProgramCache]: Analyzing trace with hash -106935072, now seen corresponding path program 84 times [2018-09-23 21:38:59,760 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:38:59,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:38:59,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:59,761 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:38:59,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:38:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:02,804 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:02,804 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:02,810 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:39:02,886 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-23 21:39:02,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:02,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:02,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:02,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2018-09-23 21:39:02,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-23 21:39:02,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-23 21:39:02,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 21:39:02,933 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-23 21:39:03,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:03,150 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-23 21:39:03,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-23 21:39:03,150 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-23 21:39:03,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:03,151 INFO L225 Difference]: With dead ends: 91 [2018-09-23 21:39:03,151 INFO L226 Difference]: Without dead ends: 89 [2018-09-23 21:39:03,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-23 21:39:03,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-23 21:39:03,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-23 21:39:03,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-23 21:39:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-23 21:39:03,154 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-23 21:39:03,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:03,154 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-23 21:39:03,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-23 21:39:03,155 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-23 21:39:03,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-23 21:39:03,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:03,155 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-23 21:39:03,156 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:03,156 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:03,156 INFO L82 PathProgramCache]: Analyzing trace with hash 979976198, now seen corresponding path program 85 times [2018-09-23 21:39:03,156 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:03,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:03,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:03,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:03,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:06,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:06,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:06,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:06,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:06,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:06,505 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:06,505 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2018-09-23 21:39:06,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-23 21:39:06,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-23 21:39:06,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 21:39:06,507 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 89 states. [2018-09-23 21:39:06,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:06,658 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-23 21:39:06,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-23 21:39:06,659 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 88 [2018-09-23 21:39:06,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:06,659 INFO L225 Difference]: With dead ends: 92 [2018-09-23 21:39:06,660 INFO L226 Difference]: Without dead ends: 90 [2018-09-23 21:39:06,660 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 21:39:06,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-23 21:39:06,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-23 21:39:06,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-23 21:39:06,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-23 21:39:06,663 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-23 21:39:06,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:06,664 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-23 21:39:06,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-23 21:39:06,664 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-23 21:39:06,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-23 21:39:06,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:06,665 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-23 21:39:06,665 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:06,665 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:06,665 INFO L82 PathProgramCache]: Analyzing trace with hash 314487200, now seen corresponding path program 86 times [2018-09-23 21:39:06,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:06,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:06,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:06,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:06,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:09,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:09,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:09,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:09,901 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:39:09,953 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:39:09,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:09,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:09,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:10,000 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:10,001 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2018-09-23 21:39:10,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-23 21:39:10,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-23 21:39:10,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:39:10,002 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-23 21:39:10,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:10,244 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-23 21:39:10,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 21:39:10,245 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-23 21:39:10,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:10,245 INFO L225 Difference]: With dead ends: 93 [2018-09-23 21:39:10,246 INFO L226 Difference]: Without dead ends: 91 [2018-09-23 21:39:10,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 21:39:10,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-23 21:39:10,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-23 21:39:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-23 21:39:10,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-23 21:39:10,249 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-23 21:39:10,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:10,250 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-23 21:39:10,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-23 21:39:10,250 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-23 21:39:10,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-23 21:39:10,250 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:10,250 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-23 21:39:10,250 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:10,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:10,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164742, now seen corresponding path program 87 times [2018-09-23 21:39:10,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:10,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:10,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:10,251 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:10,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:13,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:13,412 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:13,412 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:13,419 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:39:13,500 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-23 21:39:13,501 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:13,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:13,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:13,547 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2018-09-23 21:39:13,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-23 21:39:13,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-23 21:39:13,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 21:39:13,548 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 91 states. [2018-09-23 21:39:13,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:13,705 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-23 21:39:13,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-23 21:39:13,706 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 90 [2018-09-23 21:39:13,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:13,707 INFO L225 Difference]: With dead ends: 94 [2018-09-23 21:39:13,707 INFO L226 Difference]: Without dead ends: 92 [2018-09-23 21:39:13,708 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-23 21:39:13,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-23 21:39:13,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-23 21:39:13,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-23 21:39:13,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-23 21:39:13,711 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-23 21:39:13,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:13,711 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-23 21:39:13,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-23 21:39:13,711 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-23 21:39:13,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-23 21:39:13,711 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:13,711 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-23 21:39:13,712 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:13,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:13,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364768, now seen corresponding path program 88 times [2018-09-23 21:39:13,712 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:13,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:13,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:13,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:13,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:17,122 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:17,122 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:17,129 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:39:17,185 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:39:17,185 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:17,189 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:17,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:17,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2018-09-23 21:39:17,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-23 21:39:17,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-23 21:39:17,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 21:39:17,235 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-23 21:39:17,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:17,476 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-23 21:39:17,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-23 21:39:17,476 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-23 21:39:17,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:17,477 INFO L225 Difference]: With dead ends: 95 [2018-09-23 21:39:17,477 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 21:39:17,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-23 21:39:17,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 21:39:17,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-23 21:39:17,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-23 21:39:17,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-23 21:39:17,481 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-23 21:39:17,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:17,481 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-23 21:39:17,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-23 21:39:17,481 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-23 21:39:17,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 21:39:17,482 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:17,482 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-23 21:39:17,482 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:17,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:17,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663686, now seen corresponding path program 89 times [2018-09-23 21:39:17,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:17,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:17,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:17,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:17,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:21,080 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:21,080 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:21,087 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:39:21,217 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-23 21:39:21,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:21,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:21,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:21,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2018-09-23 21:39:21,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-23 21:39:21,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-23 21:39:21,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 21:39:21,373 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 93 states. [2018-09-23 21:39:21,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:21,672 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-23 21:39:21,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-23 21:39:21,672 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 92 [2018-09-23 21:39:21,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:21,673 INFO L225 Difference]: With dead ends: 96 [2018-09-23 21:39:21,673 INFO L226 Difference]: Without dead ends: 94 [2018-09-23 21:39:21,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-23 21:39:21,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-23 21:39:21,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-23 21:39:21,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-23 21:39:21,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-23 21:39:21,676 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-23 21:39:21,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:21,677 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-23 21:39:21,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-23 21:39:21,677 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-23 21:39:21,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-23 21:39:21,677 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:21,678 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-23 21:39:21,678 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:21,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:21,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930144, now seen corresponding path program 90 times [2018-09-23 21:39:21,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:21,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:21,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:21,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:21,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:25,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:25,163 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:25,164 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:25,172 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:39:25,273 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-23 21:39:25,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:25,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:25,323 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:25,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2018-09-23 21:39:25,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-23 21:39:25,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-23 21:39:25,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 21:39:25,325 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-23 21:39:25,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:25,506 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-23 21:39:25,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-23 21:39:25,507 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-23 21:39:25,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:25,508 INFO L225 Difference]: With dead ends: 97 [2018-09-23 21:39:25,508 INFO L226 Difference]: Without dead ends: 95 [2018-09-23 21:39:25,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-23 21:39:25,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-23 21:39:25,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-23 21:39:25,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-23 21:39:25,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-23 21:39:25,512 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-23 21:39:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:25,513 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-23 21:39:25,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-23 21:39:25,513 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-23 21:39:25,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-23 21:39:25,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:25,513 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-23 21:39:25,514 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:25,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:25,514 INFO L82 PathProgramCache]: Analyzing trace with hash 854092230, now seen corresponding path program 91 times [2018-09-23 21:39:25,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:25,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:25,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:25,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:25,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:29,035 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:29,035 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:29,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:29,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:29,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:29,145 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:29,145 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2018-09-23 21:39:29,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-23 21:39:29,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-23 21:39:29,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 21:39:29,147 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 95 states. [2018-09-23 21:39:29,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:29,300 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-23 21:39:29,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-23 21:39:29,300 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 94 [2018-09-23 21:39:29,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:29,301 INFO L225 Difference]: With dead ends: 98 [2018-09-23 21:39:29,301 INFO L226 Difference]: Without dead ends: 96 [2018-09-23 21:39:29,302 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 21:39:29,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-23 21:39:29,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-23 21:39:29,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-23 21:39:29,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-23 21:39:29,305 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-23 21:39:29,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:29,305 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-23 21:39:29,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-23 21:39:29,306 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-23 21:39:29,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-23 21:39:29,306 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:29,306 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-23 21:39:29,306 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:29,306 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:29,307 INFO L82 PathProgramCache]: Analyzing trace with hash 707051488, now seen corresponding path program 92 times [2018-09-23 21:39:29,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:29,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:29,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:29,307 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:29,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:33,110 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:33,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:33,122 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:39:33,174 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:39:33,175 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:33,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:33,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:33,257 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 95 [2018-09-23 21:39:33,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-23 21:39:33,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-23 21:39:33,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 21:39:33,258 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-23 21:39:33,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:33,416 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-23 21:39:33,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-23 21:39:33,417 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-23 21:39:33,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:33,418 INFO L225 Difference]: With dead ends: 99 [2018-09-23 21:39:33,418 INFO L226 Difference]: Without dead ends: 97 [2018-09-23 21:39:33,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-23 21:39:33,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-23 21:39:33,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-23 21:39:33,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-23 21:39:33,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-23 21:39:33,422 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-23 21:39:33,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:33,422 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-23 21:39:33,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-23 21:39:33,423 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-23 21:39:33,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-23 21:39:33,423 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:33,423 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-23 21:39:33,423 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:33,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:33,424 INFO L82 PathProgramCache]: Analyzing trace with hash 443755782, now seen corresponding path program 93 times [2018-09-23 21:39:33,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:33,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:33,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:33,424 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:33,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:37,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:37,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:37,276 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:39:37,362 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-23 21:39:37,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:37,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:37,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:37,424 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2018-09-23 21:39:37,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-23 21:39:37,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-23 21:39:37,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 21:39:37,426 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 97 states. [2018-09-23 21:39:37,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:37,611 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-23 21:39:37,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-23 21:39:37,611 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 96 [2018-09-23 21:39:37,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:37,612 INFO L225 Difference]: With dead ends: 100 [2018-09-23 21:39:37,612 INFO L226 Difference]: Without dead ends: 98 [2018-09-23 21:39:37,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-23 21:39:37,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-23 21:39:37,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-23 21:39:37,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-23 21:39:37,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-23 21:39:37,616 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-23 21:39:37,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:37,616 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-23 21:39:37,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-23 21:39:37,616 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-23 21:39:37,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-23 21:39:37,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:37,617 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-23 21:39:37,617 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:37,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:37,617 INFO L82 PathProgramCache]: Analyzing trace with hash 871523488, now seen corresponding path program 94 times [2018-09-23 21:39:37,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:37,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:37,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:37,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:37,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:41,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:41,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:41,697 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:39:41,755 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:39:41,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:41,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:41,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:41,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2018-09-23 21:39:41,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-23 21:39:41,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-23 21:39:41,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:39:41,825 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-23 21:39:42,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:42,010 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-23 21:39:42,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-23 21:39:42,011 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-23 21:39:42,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:42,012 INFO L225 Difference]: With dead ends: 101 [2018-09-23 21:39:42,012 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 21:39:42,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 21:39:42,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 21:39:42,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-23 21:39:42,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-23 21:39:42,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-23 21:39:42,017 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-23 21:39:42,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:42,017 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-23 21:39:42,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-23 21:39:42,017 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-23 21:39:42,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-23 21:39:42,018 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:42,018 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-23 21:39:42,018 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:42,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:42,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420486, now seen corresponding path program 95 times [2018-09-23 21:39:42,019 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:42,019 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:42,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:42,019 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:42,019 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:42,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:46,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:46,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:46,020 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:39:46,111 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-23 21:39:46,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:46,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:46,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:46,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:46,163 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 98 [2018-09-23 21:39:46,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-23 21:39:46,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-23 21:39:46,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 21:39:46,165 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 99 states. [2018-09-23 21:39:46,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:46,366 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-23 21:39:46,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-23 21:39:46,366 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 98 [2018-09-23 21:39:46,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:46,367 INFO L225 Difference]: With dead ends: 102 [2018-09-23 21:39:46,367 INFO L226 Difference]: Without dead ends: 100 [2018-09-23 21:39:46,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-23 21:39:46,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-23 21:39:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-23 21:39:46,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-23 21:39:46,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-23 21:39:46,371 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-23 21:39:46,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:46,371 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-23 21:39:46,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-23 21:39:46,372 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-23 21:39:46,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-23 21:39:46,372 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:46,372 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-23 21:39:46,372 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:46,373 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:46,373 INFO L82 PathProgramCache]: Analyzing trace with hash 15325536, now seen corresponding path program 96 times [2018-09-23 21:39:46,373 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:46,373 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:46,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:46,373 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:46,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:50,181 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:50,182 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:50,190 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:39:50,280 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-23 21:39:50,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:50,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:50,334 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:50,334 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 99 [2018-09-23 21:39:50,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-23 21:39:50,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-23 21:39:50,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 21:39:50,335 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-23 21:39:50,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:50,536 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-23 21:39:50,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-23 21:39:50,536 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-23 21:39:50,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:50,537 INFO L225 Difference]: With dead ends: 103 [2018-09-23 21:39:50,537 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 21:39:50,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-23 21:39:50,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 21:39:50,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 21:39:50,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 21:39:50,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-23 21:39:50,541 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-23 21:39:50,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:50,541 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-23 21:39:50,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-23 21:39:50,541 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-23 21:39:50,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 21:39:50,541 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:50,542 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-23 21:39:50,542 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:50,542 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:50,542 INFO L82 PathProgramCache]: Analyzing trace with hash 475087750, now seen corresponding path program 97 times [2018-09-23 21:39:50,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:50,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:50,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:50,543 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:50,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:54,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:54,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:54,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:54,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:54,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:54,791 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:54,792 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 100 [2018-09-23 21:39:54,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-23 21:39:54,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-23 21:39:54,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 21:39:54,793 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 101 states. [2018-09-23 21:39:55,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:55,037 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-23 21:39:55,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-23 21:39:55,037 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 100 [2018-09-23 21:39:55,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:55,038 INFO L225 Difference]: With dead ends: 104 [2018-09-23 21:39:55,038 INFO L226 Difference]: Without dead ends: 102 [2018-09-23 21:39:55,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-23 21:39:55,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-23 21:39:55,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-23 21:39:55,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-23 21:39:55,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-23 21:39:55,041 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-23 21:39:55,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:55,041 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-23 21:39:55,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-23 21:39:55,041 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-23 21:39:55,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-23 21:39:55,042 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:55,042 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-23 21:39:55,042 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:55,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:55,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814496, now seen corresponding path program 98 times [2018-09-23 21:39:55,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:55,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:55,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:55,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:39:55,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:39:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:59,327 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:39:59,327 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:39:59,334 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:39:59,391 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:39:59,391 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:39:59,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:39:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:39:59,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:39:59,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 101 [2018-09-23 21:39:59,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-23 21:39:59,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-23 21:39:59,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 21:39:59,461 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-23 21:39:59,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:39:59,741 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-23 21:39:59,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-23 21:39:59,742 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-23 21:39:59,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:39:59,743 INFO L225 Difference]: With dead ends: 105 [2018-09-23 21:39:59,743 INFO L226 Difference]: Without dead ends: 103 [2018-09-23 21:39:59,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-23 21:39:59,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-23 21:39:59,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-23 21:39:59,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-23 21:39:59,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-23 21:39:59,747 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-23 21:39:59,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:39:59,747 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-23 21:39:59,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-23 21:39:59,748 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-23 21:39:59,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-23 21:39:59,748 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:39:59,748 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-23 21:39:59,748 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:39:59,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:39:59,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670662, now seen corresponding path program 99 times [2018-09-23 21:39:59,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:39:59,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:39:59,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:59,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:39:59,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:39:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:04,104 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:04,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:04,111 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:40:04,206 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-23 21:40:04,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:04,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:04,256 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:04,256 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 102 [2018-09-23 21:40:04,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-23 21:40:04,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-23 21:40:04,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 21:40:04,258 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 103 states. [2018-09-23 21:40:04,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:04,451 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-23 21:40:04,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-23 21:40:04,451 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 102 [2018-09-23 21:40:04,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:04,452 INFO L225 Difference]: With dead ends: 106 [2018-09-23 21:40:04,452 INFO L226 Difference]: Without dead ends: 104 [2018-09-23 21:40:04,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 21:40:04,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-23 21:40:04,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-23 21:40:04,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-23 21:40:04,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-23 21:40:04,456 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-23 21:40:04,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:04,456 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-23 21:40:04,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-23 21:40:04,457 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-23 21:40:04,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-23 21:40:04,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:04,457 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-23 21:40:04,457 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:04,458 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:04,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080992, now seen corresponding path program 100 times [2018-09-23 21:40:04,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:04,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:04,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:04,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:04,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:08,890 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:08,890 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:08,896 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:40:08,962 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:40:08,962 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:08,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:09,028 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:09,028 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 103 [2018-09-23 21:40:09,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-23 21:40:09,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-23 21:40:09,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 21:40:09,030 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-23 21:40:09,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:09,260 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-23 21:40:09,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-23 21:40:09,261 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-23 21:40:09,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:09,262 INFO L225 Difference]: With dead ends: 107 [2018-09-23 21:40:09,262 INFO L226 Difference]: Without dead ends: 105 [2018-09-23 21:40:09,262 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-23 21:40:09,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-23 21:40:09,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-23 21:40:09,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-23 21:40:09,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-23 21:40:09,265 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-23 21:40:09,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:09,266 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-23 21:40:09,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-23 21:40:09,266 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-23 21:40:09,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-23 21:40:09,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:09,267 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-23 21:40:09,267 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:09,267 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:09,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1010833926, now seen corresponding path program 101 times [2018-09-23 21:40:09,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:09,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:09,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:09,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:09,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:13,791 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:13,791 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:13,798 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:40:13,907 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-23 21:40:13,907 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:13,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:13,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:13,960 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 104 [2018-09-23 21:40:13,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-23 21:40:13,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-23 21:40:13,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-23 21:40:13,961 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 105 states. [2018-09-23 21:40:14,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:14,277 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-23 21:40:14,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-23 21:40:14,277 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 104 [2018-09-23 21:40:14,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:14,279 INFO L225 Difference]: With dead ends: 108 [2018-09-23 21:40:14,279 INFO L226 Difference]: Without dead ends: 106 [2018-09-23 21:40:14,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-23 21:40:14,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-23 21:40:14,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-23 21:40:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-23 21:40:14,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-23 21:40:14,283 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-23 21:40:14,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:14,283 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-23 21:40:14,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-23 21:40:14,283 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-23 21:40:14,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-23 21:40:14,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:14,284 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-23 21:40:14,284 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:14,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:14,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1271076768, now seen corresponding path program 102 times [2018-09-23 21:40:14,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:14,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:14,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:14,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:14,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:14,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:18,908 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:18,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:18,916 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:40:19,011 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-23 21:40:19,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:19,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:19,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:19,102 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:19,103 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 105 [2018-09-23 21:40:19,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-23 21:40:19,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-23 21:40:19,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 21:40:19,104 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-09-23 21:40:19,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:19,364 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-23 21:40:19,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-23 21:40:19,364 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-09-23 21:40:19,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:19,365 INFO L225 Difference]: With dead ends: 109 [2018-09-23 21:40:19,366 INFO L226 Difference]: Without dead ends: 107 [2018-09-23 21:40:19,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-23 21:40:19,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-23 21:40:19,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-23 21:40:19,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 21:40:19,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-23 21:40:19,369 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-23 21:40:19,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:19,369 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-23 21:40:19,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-23 21:40:19,369 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-23 21:40:19,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-23 21:40:19,370 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:19,370 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-23 21:40:19,370 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:19,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:19,370 INFO L82 PathProgramCache]: Analyzing trace with hash 748670278, now seen corresponding path program 103 times [2018-09-23 21:40:19,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:19,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:19,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:19,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:19,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:24,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:24,086 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:24,086 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:24,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:40:24,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:24,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:24,215 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:24,215 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 106 [2018-09-23 21:40:24,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-23 21:40:24,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-23 21:40:24,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 21:40:24,216 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 107 states. [2018-09-23 21:40:24,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:24,449 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-23 21:40:24,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-23 21:40:24,449 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 106 [2018-09-23 21:40:24,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:24,450 INFO L225 Difference]: With dead ends: 110 [2018-09-23 21:40:24,450 INFO L226 Difference]: Without dead ends: 108 [2018-09-23 21:40:24,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-23 21:40:24,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-23 21:40:24,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-23 21:40:24,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-23 21:40:24,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-23 21:40:24,454 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-23 21:40:24,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:24,454 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-23 21:40:24,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-23 21:40:24,454 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-23 21:40:24,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-23 21:40:24,455 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:24,455 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-23 21:40:24,455 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:24,455 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:24,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1733938272, now seen corresponding path program 104 times [2018-09-23 21:40:24,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:24,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:24,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:24,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:40:24,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:29,474 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:29,474 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:29,481 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:40:29,539 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:40:29,539 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:29,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:29,615 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:29,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 107 [2018-09-23 21:40:29,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-23 21:40:29,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-23 21:40:29,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 21:40:29,617 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-09-23 21:40:29,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:29,953 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-23 21:40:29,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-23 21:40:29,954 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-09-23 21:40:29,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:29,954 INFO L225 Difference]: With dead ends: 111 [2018-09-23 21:40:29,954 INFO L226 Difference]: Without dead ends: 109 [2018-09-23 21:40:29,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-23 21:40:29,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-23 21:40:29,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-23 21:40:29,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-23 21:40:29,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-23 21:40:29,958 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-23 21:40:29,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:29,958 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-23 21:40:29,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-23 21:40:29,958 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-23 21:40:29,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-23 21:40:29,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:29,959 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-23 21:40:29,959 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:29,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:29,959 INFO L82 PathProgramCache]: Analyzing trace with hash -2082492282, now seen corresponding path program 105 times [2018-09-23 21:40:29,960 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:29,960 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:29,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:29,960 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:29,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:40:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:34,828 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:40:34,828 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:40:34,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:40:34,940 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-23 21:40:34,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:40:34,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:40:34,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:40:34,995 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:40:34,995 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 108 [2018-09-23 21:40:34,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-23 21:40:34,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-23 21:40:34,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-23 21:40:34,996 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 109 states. [2018-09-23 21:40:35,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:40:35,264 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-23 21:40:35,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-23 21:40:35,265 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 108 [2018-09-23 21:40:35,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:40:35,266 INFO L225 Difference]: With dead ends: 112 [2018-09-23 21:40:35,266 INFO L226 Difference]: Without dead ends: 110 [2018-09-23 21:40:35,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-23 21:40:35,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-23 21:40:35,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-23 21:40:35,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-23 21:40:35,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-23 21:40:35,269 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-23 21:40:35,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:40:35,270 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-23 21:40:35,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-23 21:40:35,270 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-23 21:40:35,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-23 21:40:35,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:40:35,270 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-23 21:40:35,271 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:40:35,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:40:35,271 INFO L82 PathProgramCache]: Analyzing trace with hash -132755168, now seen corresponding path program 106 times [2018-09-23 21:40:35,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:40:35,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:40:35,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:35,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:40:35,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:40:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 21:40:39,019 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 21:40:39,023 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 21:40:39,023 INFO L202 PluginConnector]: Adding new model LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 09:40:39 BoogieIcfgContainer [2018-09-23 21:40:39,024 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 21:40:39,024 INFO L168 Benchmark]: Toolchain (without parser) took 234657.33 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -222.8 MB). Free memory was 1.4 GB in the beginning and 955.8 MB in the end (delta: 490.0 MB). Peak memory consumption was 267.2 MB. Max. memory is 7.1 GB. [2018-09-23 21:40:39,026 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:40:39,026 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.35 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:40:39,026 INFO L168 Benchmark]: Boogie Preprocessor took 22.11 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:40:39,026 INFO L168 Benchmark]: RCFGBuilder took 236.85 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 21:40:39,027 INFO L168 Benchmark]: TraceAbstraction took 234347.38 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -222.8 MB). Free memory was 1.4 GB in the beginning and 955.8 MB in the end (delta: 468.8 MB). Peak memory consumption was 246.0 MB. Max. memory is 7.1 GB. [2018-09-23 21:40:39,029 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.35 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.11 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 236.85 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 234347.38 ms. Allocated memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: -222.8 MB). Free memory was 1.4 GB in the beginning and 955.8 MB in the end (delta: 468.8 MB). Peak memory consumption was 246.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 25). Cancelled while BasicCegarLoop was analyzing trace of length 110 with TraceHistMax 106, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 94 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 234.2s OverallTime, 107 OverallIterations, 106 TraceHistogramMax, 19.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 320 SDtfs, 2 SDslu, 4009 SDs, 0 SdLazy, 9829 SolverSat, 160 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11552 GetRequests, 5776 SyntacticMatches, 0 SemanticMatches, 5776 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10920 ImplicationChecksByTransitivity, 195.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=110occurred in iteration=106, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 106 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 5.6s SatisfiabilityAnalysisTime, 199.8s InterpolantComputationTime, 11763 NumberOfCodeBlocks, 11763 NumberOfCodeBlocksAsserted, 1659 NumberOfCheckSat, 11552 ConstructedInterpolants, 0 QuantifiedInterpolants, 4071558 SizeOfPredicates, 210 NumberOfNonLiveVariables, 23205 ConjunctsInSsa, 5775 ConjunctsInUnsatCore, 211 InterpolantComputations, 1 PerfectInterpolantSequences, 0/396970 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/LuxembourgOctopus.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_21-40-39-037.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LuxembourgOctopus.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_21-40-39-037.csv Completed graceful shutdown