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 0.1.23-00a8621 [2018-09-30 10:33:49,105 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 10:33:49,106 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 10:33:49,122 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 10:33:49,122 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 10:33:49,123 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 10:33:49,124 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 10:33:49,126 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 10:33:49,128 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 10:33:49,128 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 10:33:49,129 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 10:33:49,130 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 10:33:49,131 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 10:33:49,132 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 10:33:49,133 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 10:33:49,133 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 10:33:49,134 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 10:33:49,136 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 10:33:49,138 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 10:33:49,140 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 10:33:49,141 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 10:33:49,142 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 10:33:49,144 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 10:33:49,153 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 [2018-09-30 10:33:49,174 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 10:33:49,174 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 10:33:49,175 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 10:33:49,175 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 10:33:49,176 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 10:33:49,176 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 10:33:49,176 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 10:33:49,177 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 10:33:49,177 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 10:33:49,177 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 10:33:49,177 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 10:33:49,177 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 10:33:49,178 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 10:33:49,178 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 10:33:49,178 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 10:33:49,178 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 10:33:49,178 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 10:33:49,179 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 10:33:49,179 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 10:33:49,179 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 10:33:49,179 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 10:33:49,179 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 10:33:49,180 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 10:33:49,180 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 10:33:49,180 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 10:33:49,180 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 10:33:49,180 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 10:33:49,181 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 10:33:49,181 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 10:33:49,181 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 10:33:49,234 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 10:33:49,248 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 10:33:49,253 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 10:33:49,254 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 10:33:49,255 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 10:33:49,256 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LuxembourgOctopus.bpl [2018-09-30 10:33:49,256 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LuxembourgOctopus.bpl' [2018-09-30 10:33:49,303 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 10:33:49,306 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 10:33:49,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 10:33:49,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 10:33:49,307 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 10:33:49,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:33:49" (1/1) ... [2018-09-30 10:33:49,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:33:49" (1/1) ... [2018-09-30 10:33:49,341 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-30 10:33:49,342 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-30 10:33:49,342 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-30 10:33:49,343 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 10:33:49,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 10:33:49,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 10:33:49,344 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 10:33:49,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:33:49" (1/1) ... [2018-09-30 10:33:49,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:33:49" (1/1) ... [2018-09-30 10:33:49,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:33:49" (1/1) ... [2018-09-30 10:33:49,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:33:49" (1/1) ... [2018-09-30 10:33:49,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:33:49" (1/1) ... [2018-09-30 10:33:49,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:33:49" (1/1) ... [2018-09-30 10:33:49,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:33:49" (1/1) ... [2018-09-30 10:33:49,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 10:33:49,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 10:33:49,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 10:33:49,366 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 10:33:49,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:33:49" (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 [2018-09-30 10:33:49,423 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-30 10:33:49,423 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-30 10:33:49,423 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-30 10:33:49,640 INFO L345 CfgBuilder]: Using library mode [2018-09-30 10:33:49,641 INFO L202 PluginConnector]: Adding new model LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:33:49 BoogieIcfgContainer [2018-09-30 10:33:49,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 10:33:49,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 10:33:49,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 10:33:49,647 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 10:33:49,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 10:33:49" (1/2) ... [2018-09-30 10:33:49,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb27f1b and model type LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 10:33:49, skipping insertion in model container [2018-09-30 10:33:49,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 10:33:49" (2/2) ... [2018-09-30 10:33:49,656 INFO L112 eAbstractionObserver]: Analyzing ICFG LuxembourgOctopus.bpl [2018-09-30 10:33:49,668 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 10:33:49,680 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 10:33:49,736 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 10:33:49,737 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 10:33:49,737 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 10:33:49,737 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 10:33:49,737 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 10:33:49,737 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 10:33:49,738 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 10:33:49,738 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 10:33:49,738 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 10:33:49,756 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-30 10:33:49,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-30 10:33:49,766 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:49,767 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-30 10:33:49,769 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:49,776 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:49,776 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-09-30 10:33:49,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:49,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:49,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:49,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:49,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:49,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:50,000 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 10:33:50,001 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 10:33:50,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 10:33:50,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 10:33:50,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 10:33:50,027 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-30 10:33:50,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:50,136 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-30 10:33:50,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 10:33:50,146 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-30 10:33:50,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:50,170 INFO L225 Difference]: With dead ends: 13 [2018-09-30 10:33:50,170 INFO L226 Difference]: Without dead ends: 5 [2018-09-30 10:33:50,175 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 [2018-09-30 10:33:50,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-30 10:33:50,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-30 10:33:50,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-30 10:33:50,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-30 10:33:50,238 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-30 10:33:50,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:50,238 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-30 10:33:50,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 10:33:50,239 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-30 10:33:50,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 10:33:50,239 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:50,239 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 10:33:50,240 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:50,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:50,240 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-09-30 10:33:50,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:50,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:50,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:50,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:50,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:50,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:50,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:50,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:50,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:50,418 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:50,419 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2018-09-30 10:33:50,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 10:33:50,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 10:33:50,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:33:50,420 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-09-30 10:33:50,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:50,463 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-30 10:33:50,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 10:33:50,463 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-30 10:33:50,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:50,464 INFO L225 Difference]: With dead ends: 8 [2018-09-30 10:33:50,464 INFO L226 Difference]: Without dead ends: 6 [2018-09-30 10:33:50,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-09-30 10:33:50,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-30 10:33:50,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-30 10:33:50,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-30 10:33:50,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-30 10:33:50,468 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-30 10:33:50,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:50,468 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-30 10:33:50,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 10:33:50,469 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-30 10:33:50,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-30 10:33:50,469 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:50,469 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-30 10:33:50,470 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:50,470 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:50,470 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-09-30 10:33:50,470 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:50,470 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:50,471 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:50,472 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:50,472 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:50,560 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:50,561 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:50,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:50,592 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:50,593 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:50,595 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:50,636 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:50,636 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-09-30 10:33:50,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 10:33:50,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 10:33:50,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:33:50,638 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-30 10:33:50,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:50,681 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-30 10:33:50,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 10:33:50,682 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-30 10:33:50,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:50,682 INFO L225 Difference]: With dead ends: 9 [2018-09-30 10:33:50,683 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 10:33:50,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-30 10:33:50,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 10:33:50,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 10:33:50,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 10:33:50,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 10:33:50,686 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-30 10:33:50,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:50,686 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 10:33:50,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 10:33:50,686 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 10:33:50,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 10:33:50,687 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:50,687 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-30 10:33:50,687 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:50,688 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:50,688 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-09-30 10:33:50,688 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:50,688 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:50,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:50,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:50,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:50,812 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:50,812 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:50,821 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:50,870 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-30 10:33:50,870 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:50,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:50,957 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:50,957 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-09-30 10:33:50,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 10:33:50,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 10:33:50,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-09-30 10:33:50,959 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-09-30 10:33:51,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:51,100 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-30 10:33:51,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 10:33:51,100 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-09-30 10:33:51,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:51,101 INFO L225 Difference]: With dead ends: 10 [2018-09-30 10:33:51,101 INFO L226 Difference]: Without dead ends: 8 [2018-09-30 10:33:51,102 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 [2018-09-30 10:33:51,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-30 10:33:51,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-30 10:33:51,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-30 10:33:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-30 10:33:51,105 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-30 10:33:51,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:51,105 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-30 10:33:51,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 10:33:51,105 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-30 10:33:51,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-30 10:33:51,106 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:51,106 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-30 10:33:51,106 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:51,107 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:51,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-09-30 10:33:51,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:51,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:51,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:51,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:51,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:51,375 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:51,375 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 [2018-09-30 10:33:51,383 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:51,396 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:51,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:51,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:51,438 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:51,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-09-30 10:33:51,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 10:33:51,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 10:33:51,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-09-30 10:33:51,440 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-30 10:33:51,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:51,481 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 10:33:51,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 10:33:51,482 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-30 10:33:51,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:51,483 INFO L225 Difference]: With dead ends: 11 [2018-09-30 10:33:51,484 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 10:33:51,484 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 [2018-09-30 10:33:51,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 10:33:51,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 10:33:51,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 10:33:51,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 10:33:51,488 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-30 10:33:51,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:51,488 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 10:33:51,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 10:33:51,488 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 10:33:51,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 10:33:51,489 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:51,489 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-30 10:33:51,489 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:51,490 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:51,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-09-30 10:33:51,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:51,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:51,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:51,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:51,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:51,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:51,682 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:51,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:51,692 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:51,714 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-30 10:33:51,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:51,715 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:51,776 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:51,776 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-09-30 10:33:51,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 10:33:51,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 10:33:51,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:51,777 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-09-30 10:33:51,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:51,818 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-30 10:33:51,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 10:33:51,819 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-09-30 10:33:51,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:51,819 INFO L225 Difference]: With dead ends: 12 [2018-09-30 10:33:51,819 INFO L226 Difference]: Without dead ends: 10 [2018-09-30 10:33:51,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-30 10:33:51,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-30 10:33:51,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-30 10:33:51,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-30 10:33:51,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-30 10:33:51,828 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-30 10:33:51,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:51,828 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-30 10:33:51,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 10:33:51,829 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-30 10:33:51,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-30 10:33:51,829 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:51,829 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-30 10:33:51,829 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:51,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:51,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-09-30 10:33:51,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:51,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:51,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:51,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:51,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:51,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:51,944 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:51,944 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:51,945 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 [2018-09-30 10:33:51,954 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:51,975 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-30 10:33:51,975 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:51,977 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:52,019 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:52,019 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-09-30 10:33:52,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 10:33:52,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 10:33:52,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:52,021 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-30 10:33:52,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:52,056 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 10:33:52,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 10:33:52,057 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-30 10:33:52,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:52,058 INFO L225 Difference]: With dead ends: 13 [2018-09-30 10:33:52,058 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 10:33:52,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-30 10:33:52,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 10:33:52,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 10:33:52,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 10:33:52,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 10:33:52,062 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-30 10:33:52,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:52,063 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 10:33:52,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 10:33:52,063 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 10:33:52,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 10:33:52,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:52,064 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-30 10:33:52,064 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:52,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:52,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-09-30 10:33:52,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:52,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:52,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:52,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:52,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:52,221 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:52,221 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 [2018-09-30 10:33:52,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:52,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:52,289 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:52,289 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-09-30 10:33:52,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 10:33:52,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 10:33:52,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:33:52,290 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-09-30 10:33:52,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:52,328 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-30 10:33:52,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 10:33:52,329 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-09-30 10:33:52,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:52,329 INFO L225 Difference]: With dead ends: 14 [2018-09-30 10:33:52,329 INFO L226 Difference]: Without dead ends: 12 [2018-09-30 10:33:52,330 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-30 10:33:52,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-30 10:33:52,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-30 10:33:52,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-30 10:33:52,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-30 10:33:52,333 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-30 10:33:52,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:52,333 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-30 10:33:52,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 10:33:52,334 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-30 10:33:52,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-30 10:33:52,334 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:52,334 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-30 10:33:52,334 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:52,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:52,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-09-30 10:33:52,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:52,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:52,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:52,336 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:52,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:52,815 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:52,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:52,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:52,827 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:52,835 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:52,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:52,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:52,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:52,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-09-30 10:33:52,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 10:33:52,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 10:33:52,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:33:52,883 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-30 10:33:52,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:52,936 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 10:33:52,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 10:33:52,937 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-30 10:33:52,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:52,937 INFO L225 Difference]: With dead ends: 15 [2018-09-30 10:33:52,937 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 10:33:52,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-30 10:33:52,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 10:33:52,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 10:33:52,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 10:33:52,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 10:33:52,941 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-30 10:33:52,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:52,941 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 10:33:52,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 10:33:52,941 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 10:33:52,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 10:33:52,942 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:52,942 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-30 10:33:52,943 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:52,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:52,943 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-09-30 10:33:52,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:52,943 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:52,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:52,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:52,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:53,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:53,253 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 [2018-09-30 10:33:53,261 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:53,287 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-30 10:33:53,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:53,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:53,324 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:53,324 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-09-30 10:33:53,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 10:33:53,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 10:33:53,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:33:53,326 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-09-30 10:33:53,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:53,373 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-30 10:33:53,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 10:33:53,373 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-30 10:33:53,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:53,374 INFO L225 Difference]: With dead ends: 16 [2018-09-30 10:33:53,374 INFO L226 Difference]: Without dead ends: 14 [2018-09-30 10:33:53,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-30 10:33:53,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-30 10:33:53,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-30 10:33:53,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-30 10:33:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-30 10:33:53,379 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-30 10:33:53,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:53,379 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-30 10:33:53,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 10:33:53,379 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-30 10:33:53,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-30 10:33:53,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:53,380 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-30 10:33:53,380 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:53,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:53,381 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-09-30 10:33:53,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:53,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:53,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:53,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:53,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:53,612 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:53,613 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:53,613 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 [2018-09-30 10:33:53,627 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:53,639 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:53,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:53,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:53,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:53,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-09-30 10:33:53,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 10:33:53,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 10:33:53,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-30 10:33:53,686 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-30 10:33:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:53,727 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 10:33:53,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 10:33:53,727 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-30 10:33:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:53,728 INFO L225 Difference]: With dead ends: 17 [2018-09-30 10:33:53,728 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 10:33:53,729 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 [2018-09-30 10:33:53,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 10:33:53,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 10:33:53,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 10:33:53,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 10:33:53,732 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-30 10:33:53,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:53,732 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 10:33:53,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 10:33:53,733 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 10:33:53,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 10:33:53,733 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:53,733 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-30 10:33:53,734 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:53,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:53,734 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-09-30 10:33:53,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:53,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:53,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:53,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:53,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:53,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:53,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:53,922 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:53,934 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-30 10:33:53,935 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:53,937 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:53,954 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:53,979 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:53,979 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-09-30 10:33:53,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 10:33:53,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 10:33:53,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-30 10:33:53,980 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-09-30 10:33:54,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:54,036 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-30 10:33:54,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 10:33:54,037 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-30 10:33:54,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:54,037 INFO L225 Difference]: With dead ends: 18 [2018-09-30 10:33:54,037 INFO L226 Difference]: Without dead ends: 16 [2018-09-30 10:33:54,038 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 [2018-09-30 10:33:54,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-30 10:33:54,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-30 10:33:54,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-30 10:33:54,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-30 10:33:54,041 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-30 10:33:54,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:54,042 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-30 10:33:54,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 10:33:54,042 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-30 10:33:54,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-30 10:33:54,042 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:54,042 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-30 10:33:54,043 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:54,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:54,043 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-09-30 10:33:54,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:54,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:54,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:54,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:54,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:54,235 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:54,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:54,244 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:54,260 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 10:33:54,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:54,263 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:54,286 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:54,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:54,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-09-30 10:33:54,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 10:33:54,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 10:33:54,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:33:54,309 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-30 10:33:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:54,382 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 10:33:54,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 10:33:54,383 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-30 10:33:54,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:54,383 INFO L225 Difference]: With dead ends: 19 [2018-09-30 10:33:54,383 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 10:33:54,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-30 10:33:54,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 10:33:54,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 10:33:54,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 10:33:54,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 10:33:54,388 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-30 10:33:54,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:54,388 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 10:33:54,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 10:33:54,388 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 10:33:54,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 10:33:54,389 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:54,389 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-30 10:33:54,389 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:54,390 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:54,390 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-09-30 10:33:54,390 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:54,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:54,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:54,391 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:54,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:54,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:54,579 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 [2018-09-30 10:33:54,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:54,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:54,663 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:54,663 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-09-30 10:33:54,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 10:33:54,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 10:33:54,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:33:54,665 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-09-30 10:33:54,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:54,953 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-30 10:33:54,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 10:33:54,954 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-09-30 10:33:54,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:54,955 INFO L225 Difference]: With dead ends: 20 [2018-09-30 10:33:54,955 INFO L226 Difference]: Without dead ends: 18 [2018-09-30 10:33:54,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-30 10:33:54,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-30 10:33:54,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-30 10:33:54,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-30 10:33:54,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-30 10:33:54,959 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-30 10:33:54,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:54,959 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-30 10:33:54,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 10:33:54,960 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-30 10:33:54,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-30 10:33:54,960 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:54,960 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-30 10:33:54,961 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:54,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:54,961 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-09-30 10:33:54,961 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:54,961 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:54,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:54,962 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:54,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:55,281 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:55,281 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 [2018-09-30 10:33:55,289 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:55,300 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:55,300 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:55,303 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:55,348 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:55,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-09-30 10:33:55,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 10:33:55,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 10:33:55,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-30 10:33:55,350 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-30 10:33:55,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:55,435 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 10:33:55,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 10:33:55,437 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-30 10:33:55,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:55,437 INFO L225 Difference]: With dead ends: 21 [2018-09-30 10:33:55,437 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 10:33:55,438 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 [2018-09-30 10:33:55,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 10:33:55,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 10:33:55,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 10:33:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 10:33:55,442 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-30 10:33:55,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:55,442 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 10:33:55,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 10:33:55,442 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 10:33:55,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 10:33:55,443 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:55,443 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-30 10:33:55,443 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:55,443 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:55,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-09-30 10:33:55,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:55,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:55,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:55,445 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:55,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:55,687 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:55,687 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 [2018-09-30 10:33:55,695 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:55,826 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-30 10:33:55,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:55,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:55,923 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:55,959 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:55,959 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-09-30 10:33:55,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 10:33:55,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 10:33:55,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:33:55,960 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-09-30 10:33:56,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:56,289 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-30 10:33:56,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 10:33:56,290 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-09-30 10:33:56,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:56,290 INFO L225 Difference]: With dead ends: 22 [2018-09-30 10:33:56,290 INFO L226 Difference]: Without dead ends: 20 [2018-09-30 10:33:56,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-30 10:33:56,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-30 10:33:56,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-30 10:33:56,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-30 10:33:56,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-30 10:33:56,294 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-30 10:33:56,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:56,295 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-30 10:33:56,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 10:33:56,295 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-30 10:33:56,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-30 10:33:56,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:56,295 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-30 10:33:56,296 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:56,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:56,296 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-09-30 10:33:56,296 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:56,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:56,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:56,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:56,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:56,782 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:56,782 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:33:56,790 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:33:56,819 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:33:56,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:56,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:56,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:56,862 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-09-30 10:33:56,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 10:33:56,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 10:33:56,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-30 10:33:56,863 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-30 10:33:56,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:56,907 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 10:33:56,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 10:33:56,908 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-30 10:33:56,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:56,908 INFO L225 Difference]: With dead ends: 23 [2018-09-30 10:33:56,908 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 10:33:56,909 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 [2018-09-30 10:33:56,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 10:33:56,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 10:33:56,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 10:33:56,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 10:33:56,913 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-30 10:33:56,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:56,914 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 10:33:56,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 10:33:56,914 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 10:33:56,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 10:33:56,915 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:56,915 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-30 10:33:56,915 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:56,915 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:56,916 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-09-30 10:33:56,916 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:56,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:56,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:56,917 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:56,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:57,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:57,290 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 [2018-09-30 10:33:57,299 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:33:57,380 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-30 10:33:57,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:57,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:57,512 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:57,512 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-09-30 10:33:57,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 10:33:57,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 10:33:57,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-30 10:33:57,513 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-09-30 10:33:57,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:57,565 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-30 10:33:57,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 10:33:57,566 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-09-30 10:33:57,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:57,566 INFO L225 Difference]: With dead ends: 24 [2018-09-30 10:33:57,567 INFO L226 Difference]: Without dead ends: 22 [2018-09-30 10:33:57,567 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 [2018-09-30 10:33:57,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-30 10:33:57,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-30 10:33:57,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-30 10:33:57,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-30 10:33:57,571 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-30 10:33:57,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:57,571 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-30 10:33:57,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 10:33:57,572 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-30 10:33:57,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-30 10:33:57,572 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:57,572 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-30 10:33:57,573 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:57,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:57,573 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-09-30 10:33:57,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:57,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:57,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:57,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:57,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:58,087 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:58,087 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 [2018-09-30 10:33:58,098 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:33:58,113 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-30 10:33:58,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:58,114 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:58,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:58,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-09-30 10:33:58,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 10:33:58,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 10:33:58,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:33:58,159 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-30 10:33:58,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:58,278 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 10:33:58,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 10:33:58,279 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-30 10:33:58,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:58,280 INFO L225 Difference]: With dead ends: 25 [2018-09-30 10:33:58,280 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 10:33:58,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-30 10:33:58,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 10:33:58,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 10:33:58,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 10:33:58,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 10:33:58,285 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-30 10:33:58,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:58,285 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 10:33:58,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 10:33:58,286 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 10:33:58,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 10:33:58,286 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:58,286 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-30 10:33:58,287 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:58,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:58,287 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-09-30 10:33:58,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:58,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:58,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:58,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:58,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:58,578 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:58,579 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:58,579 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 [2018-09-30 10:33:58,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:58,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:58,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:58,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-09-30 10:33:58,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 10:33:58,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 10:33:58,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:33:58,645 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-09-30 10:33:58,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:58,700 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-30 10:33:58,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 10:33:58,701 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-09-30 10:33:58,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:58,701 INFO L225 Difference]: With dead ends: 26 [2018-09-30 10:33:58,701 INFO L226 Difference]: Without dead ends: 24 [2018-09-30 10:33:58,702 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-30 10:33:58,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-30 10:33:58,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-30 10:33:58,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-30 10:33:58,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-30 10:33:58,706 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-30 10:33:58,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:58,706 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-30 10:33:58,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 10:33:58,707 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-30 10:33:58,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-30 10:33:58,707 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:58,707 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-30 10:33:58,708 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:58,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:58,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-09-30 10:33:58,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:58,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:58,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:58,709 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:33:58,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:59,042 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:59,042 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:33:59,049 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:33:59,069 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:33:59,070 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:59,073 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:59,118 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:59,118 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-09-30 10:33:59,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 10:33:59,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 10:33:59,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:33:59,119 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-30 10:33:59,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:59,193 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 10:33:59,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 10:33:59,194 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-30 10:33:59,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:59,194 INFO L225 Difference]: With dead ends: 27 [2018-09-30 10:33:59,195 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 10:33:59,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-30 10:33:59,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 10:33:59,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 10:33:59,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 10:33:59,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 10:33:59,199 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-30 10:33:59,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:59,199 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 10:33:59,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 10:33:59,199 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 10:33:59,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 10:33:59,200 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:59,200 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-30 10:33:59,200 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:59,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:59,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-09-30 10:33:59,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:59,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:59,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:59,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:59,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:33:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:59,569 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:33:59,569 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 [2018-09-30 10:33:59,576 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:33:59,663 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-30 10:33:59,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:33:59,666 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:33:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:33:59,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:33:59,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-09-30 10:33:59,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 10:33:59,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 10:33:59,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-30 10:33:59,707 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-09-30 10:33:59,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:33:59,782 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-30 10:33:59,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 10:33:59,785 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-09-30 10:33:59,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:33:59,785 INFO L225 Difference]: With dead ends: 28 [2018-09-30 10:33:59,785 INFO L226 Difference]: Without dead ends: 26 [2018-09-30 10:33:59,786 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 [2018-09-30 10:33:59,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-30 10:33:59,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-30 10:33:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-30 10:33:59,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-30 10:33:59,790 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-30 10:33:59,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:33:59,791 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-30 10:33:59,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 10:33:59,791 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-30 10:33:59,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-30 10:33:59,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:33:59,792 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-30 10:33:59,792 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:33:59,792 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:33:59,792 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-09-30 10:33:59,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:33:59,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:33:59,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:59,793 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:33:59,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:33:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:00,310 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:00,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:34:00,319 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:00,333 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:00,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:00,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:00,354 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:00,389 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:00,389 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-09-30 10:34:00,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 10:34:00,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 10:34:00,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:34:00,390 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-30 10:34:00,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:00,479 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 10:34:00,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 10:34:00,480 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-30 10:34:00,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:00,480 INFO L225 Difference]: With dead ends: 29 [2018-09-30 10:34:00,481 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 10:34:00,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-30 10:34:00,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 10:34:00,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 10:34:00,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 10:34:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 10:34:00,487 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-30 10:34:00,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:00,488 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 10:34:00,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 10:34:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 10:34:00,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 10:34:00,489 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:00,489 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-30 10:34:00,489 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:00,489 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:00,489 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-09-30 10:34:00,489 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:00,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:00,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:00,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:00,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:00,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:00,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:34:01,006 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:01,088 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-30 10:34:01,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:01,090 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:01,144 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:01,144 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-09-30 10:34:01,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 10:34:01,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 10:34:01,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:34:01,145 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-09-30 10:34:01,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:01,232 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-30 10:34:01,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 10:34:01,233 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-09-30 10:34:01,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:01,234 INFO L225 Difference]: With dead ends: 30 [2018-09-30 10:34:01,234 INFO L226 Difference]: Without dead ends: 28 [2018-09-30 10:34:01,235 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-30 10:34:01,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-30 10:34:01,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-30 10:34:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-30 10:34:01,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-30 10:34:01,239 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-30 10:34:01,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:01,239 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-30 10:34:01,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 10:34:01,240 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-30 10:34:01,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-30 10:34:01,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:01,240 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-30 10:34:01,241 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:01,241 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:01,241 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-09-30 10:34:01,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:01,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:01,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:01,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:01,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:02,033 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:02,033 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 [2018-09-30 10:34:02,040 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:02,064 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 10:34:02,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:02,068 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:02,105 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:02,105 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-09-30 10:34:02,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 10:34:02,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 10:34:02,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-30 10:34:02,106 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-30 10:34:02,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:02,185 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 10:34:02,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 10:34:02,186 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-30 10:34:02,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:02,186 INFO L225 Difference]: With dead ends: 31 [2018-09-30 10:34:02,187 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 10:34:02,187 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 [2018-09-30 10:34:02,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 10:34:02,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 10:34:02,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 10:34:02,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 10:34:02,191 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-30 10:34:02,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:02,191 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 10:34:02,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 10:34:02,192 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 10:34:02,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 10:34:02,192 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:02,192 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-30 10:34:02,193 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:02,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:02,193 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-09-30 10:34:02,193 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:02,193 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:02,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:02,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:02,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:03,411 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:03,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:03,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:34:03,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:03,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:03,453 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:03,482 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:03,482 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-09-30 10:34:03,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 10:34:03,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 10:34:03,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:34:03,483 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-09-30 10:34:03,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:03,822 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-30 10:34:03,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 10:34:03,822 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-09-30 10:34:03,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:03,823 INFO L225 Difference]: With dead ends: 32 [2018-09-30 10:34:03,823 INFO L226 Difference]: Without dead ends: 30 [2018-09-30 10:34:03,824 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-30 10:34:03,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-30 10:34:03,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-30 10:34:03,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-30 10:34:03,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-30 10:34:03,827 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-30 10:34:03,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:03,828 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-30 10:34:03,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 10:34:03,828 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-30 10:34:03,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-30 10:34:03,829 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:03,829 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-30 10:34:03,829 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:03,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:03,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-09-30 10:34:03,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:03,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:03,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:03,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:03,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:04,763 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:04,763 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 [2018-09-30 10:34:04,778 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:04,796 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:04,796 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:04,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:04,829 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:04,857 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:04,857 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-09-30 10:34:04,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 10:34:04,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 10:34:04,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:34:04,858 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-30 10:34:04,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:04,938 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 10:34:04,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 10:34:04,938 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-30 10:34:04,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:04,939 INFO L225 Difference]: With dead ends: 33 [2018-09-30 10:34:04,939 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 10:34:04,939 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-30 10:34:04,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 10:34:04,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 10:34:04,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 10:34:04,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 10:34:04,942 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-30 10:34:04,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:04,942 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 10:34:04,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 10:34:04,943 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 10:34:04,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 10:34:04,943 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:04,943 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-30 10:34:04,943 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:04,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:04,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-09-30 10:34:04,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:04,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:04,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:04,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:04,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:06,084 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:06,084 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 [2018-09-30 10:34:06,092 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:06,116 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-30 10:34:06,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:06,118 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:06,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:06,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-09-30 10:34:06,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 10:34:06,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 10:34:06,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:34:06,160 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-09-30 10:34:06,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:06,242 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-30 10:34:06,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 10:34:06,242 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-09-30 10:34:06,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:06,243 INFO L225 Difference]: With dead ends: 34 [2018-09-30 10:34:06,243 INFO L226 Difference]: Without dead ends: 32 [2018-09-30 10:34:06,244 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-30 10:34:06,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-30 10:34:06,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-30 10:34:06,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-30 10:34:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-30 10:34:06,247 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-30 10:34:06,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:06,247 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-30 10:34:06,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 10:34:06,248 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-30 10:34:06,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-30 10:34:06,248 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:06,248 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-30 10:34:06,248 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:06,249 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:06,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-09-30 10:34:06,249 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:06,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:06,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:06,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:06,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:06,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:06,722 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:06,723 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:06,723 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:34:06,738 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:06,755 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:06,755 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:06,757 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:06,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:06,799 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-09-30 10:34:06,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 10:34:06,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 10:34:06,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:34:06,800 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-30 10:34:06,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:06,979 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 10:34:06,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 10:34:06,979 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-30 10:34:06,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:06,980 INFO L225 Difference]: With dead ends: 35 [2018-09-30 10:34:06,980 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 10:34:06,980 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-30 10:34:06,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 10:34:06,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 10:34:06,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 10:34:06,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 10:34:06,983 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-30 10:34:06,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:06,984 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 10:34:06,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 10:34:06,984 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 10:34:06,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 10:34:06,984 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:06,984 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-30 10:34:06,985 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:06,985 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:06,985 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-09-30 10:34:06,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:06,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:06,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:06,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:06,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:07,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:07,612 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 [2018-09-30 10:34:07,619 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:07,644 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-30 10:34:07,645 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:07,648 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:07,694 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:07,694 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-09-30 10:34:07,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 10:34:07,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 10:34:07,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:34:07,696 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-09-30 10:34:07,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:07,789 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-30 10:34:07,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 10:34:07,790 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-09-30 10:34:07,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:07,791 INFO L225 Difference]: With dead ends: 36 [2018-09-30 10:34:07,791 INFO L226 Difference]: Without dead ends: 34 [2018-09-30 10:34:07,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-30 10:34:07,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-30 10:34:07,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-30 10:34:07,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-30 10:34:07,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-30 10:34:07,796 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-30 10:34:07,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:07,796 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-30 10:34:07,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 10:34:07,796 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-30 10:34:07,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-30 10:34:07,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:07,797 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-30 10:34:07,797 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:07,797 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:07,797 INFO L82 PathProgramCache]: Analyzing trace with hash -410989408, now seen corresponding path program 30 times [2018-09-30 10:34:07,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:07,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:07,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:07,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:07,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:08,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:08,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:34:08,421 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:08,442 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-30 10:34:08,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:08,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:08,461 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:08,491 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:08,492 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-09-30 10:34:08,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 10:34:08,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 10:34:08,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:34:08,493 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-30 10:34:08,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:08,665 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 10:34:08,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 10:34:08,666 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-30 10:34:08,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:08,667 INFO L225 Difference]: With dead ends: 37 [2018-09-30 10:34:08,667 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 10:34:08,668 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-30 10:34:08,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 10:34:08,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 10:34:08,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 10:34:08,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 10:34:08,671 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-30 10:34:08,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:08,671 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 10:34:08,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 10:34:08,671 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 10:34:08,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 10:34:08,672 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:08,672 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-30 10:34:08,672 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:08,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:08,673 INFO L82 PathProgramCache]: Analyzing trace with hash 144226374, now seen corresponding path program 31 times [2018-09-30 10:34:08,673 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:08,673 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:08,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:08,674 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:08,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:09,250 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:09,250 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 [2018-09-30 10:34:09,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:09,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:09,299 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:09,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:09,319 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-09-30 10:34:09,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 10:34:09,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 10:34:09,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-30 10:34:09,321 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-09-30 10:34:09,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:09,381 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-30 10:34:09,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 10:34:09,381 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-09-30 10:34:09,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:09,382 INFO L225 Difference]: With dead ends: 38 [2018-09-30 10:34:09,382 INFO L226 Difference]: Without dead ends: 36 [2018-09-30 10:34:09,383 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 [2018-09-30 10:34:09,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-30 10:34:09,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-30 10:34:09,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-30 10:34:09,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-30 10:34:09,387 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-30 10:34:09,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:09,387 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-30 10:34:09,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 10:34:09,387 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-30 10:34:09,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-30 10:34:09,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:09,388 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-30 10:34:09,388 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:09,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:09,388 INFO L82 PathProgramCache]: Analyzing trace with hash 176046432, now seen corresponding path program 32 times [2018-09-30 10:34:09,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:09,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:09,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:09,389 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:09,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:09,961 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:09,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:34:09,969 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:09,990 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:09,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:09,993 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:10,025 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:10,025 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-09-30 10:34:10,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 10:34:10,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 10:34:10,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:34:10,026 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-30 10:34:10,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:10,147 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 10:34:10,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 10:34:10,148 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-30 10:34:10,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:10,148 INFO L225 Difference]: With dead ends: 39 [2018-09-30 10:34:10,149 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 10:34:10,150 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-30 10:34:10,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 10:34:10,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 10:34:10,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 10:34:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 10:34:10,153 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-30 10:34:10,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:10,153 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 10:34:10,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 10:34:10,153 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 10:34:10,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 10:34:10,154 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:10,154 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-30 10:34:10,154 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:10,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:10,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468230, now seen corresponding path program 33 times [2018-09-30 10:34:10,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:10,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:10,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:10,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:10,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:10,783 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:10,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:34:10,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:10,816 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-30 10:34:10,817 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:10,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:10,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:10,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-09-30 10:34:10,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 10:34:10,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 10:34:10,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:34:10,855 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-09-30 10:34:10,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:10,899 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-30 10:34:10,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 10:34:10,899 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-09-30 10:34:10,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:10,900 INFO L225 Difference]: With dead ends: 40 [2018-09-30 10:34:10,900 INFO L226 Difference]: Without dead ends: 38 [2018-09-30 10:34:10,901 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-30 10:34:10,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-30 10:34:10,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-30 10:34:10,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-30 10:34:10,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-30 10:34:10,904 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-30 10:34:10,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:10,905 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-30 10:34:10,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 10:34:10,905 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-30 10:34:10,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-30 10:34:10,905 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:10,905 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-30 10:34:10,905 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:10,905 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:10,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772896, now seen corresponding path program 34 times [2018-09-30 10:34:10,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:10,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:10,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:10,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:10,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:11,706 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:11,706 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:11,706 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 [2018-09-30 10:34:11,713 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:11,740 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:11,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:11,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:11,758 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:11,788 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:11,789 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-09-30 10:34:11,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 10:34:11,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 10:34:11,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:34:11,790 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-30 10:34:12,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:12,708 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 10:34:12,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 10:34:12,708 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-30 10:34:12,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:12,709 INFO L225 Difference]: With dead ends: 41 [2018-09-30 10:34:12,709 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 10:34:12,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-30 10:34:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 10:34:12,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 10:34:12,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 10:34:12,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 10:34:12,712 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-30 10:34:12,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:12,713 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 10:34:12,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 10:34:12,713 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 10:34:12,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 10:34:12,713 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:12,720 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-30 10:34:12,720 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:12,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:12,720 INFO L82 PathProgramCache]: Analyzing trace with hash 440348358, now seen corresponding path program 35 times [2018-09-30 10:34:12,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:12,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:12,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:12,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:12,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:13,902 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:13,902 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:13,902 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 [2018-09-30 10:34:13,911 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:13,939 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-30 10:34:13,939 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:13,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:13,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:13,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-09-30 10:34:13,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 10:34:13,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 10:34:13,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:34:13,990 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-09-30 10:34:14,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:14,063 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-30 10:34:14,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 10:34:14,063 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-09-30 10:34:14,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:14,064 INFO L225 Difference]: With dead ends: 42 [2018-09-30 10:34:14,064 INFO L226 Difference]: Without dead ends: 40 [2018-09-30 10:34:14,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-30 10:34:14,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-30 10:34:14,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-30 10:34:14,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-30 10:34:14,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-30 10:34:14,068 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-30 10:34:14,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:14,068 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-30 10:34:14,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 10:34:14,068 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-30 10:34:14,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-30 10:34:14,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:14,068 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-30 10:34:14,069 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:14,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:14,069 INFO L82 PathProgramCache]: Analyzing trace with hash 765893344, now seen corresponding path program 36 times [2018-09-30 10:34:14,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:14,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:14,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:14,070 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:14,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:14,742 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:14,742 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:34:14,750 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:14,792 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 10:34:14,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:14,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:14,830 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:14,830 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-09-30 10:34:14,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 10:34:14,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 10:34:14,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-30 10:34:14,831 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-30 10:34:14,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:14,879 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 10:34:14,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 10:34:14,880 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-30 10:34:14,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:14,881 INFO L225 Difference]: With dead ends: 43 [2018-09-30 10:34:14,881 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 10:34:14,882 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 [2018-09-30 10:34:14,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 10:34:14,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 10:34:14,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 10:34:14,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 10:34:14,884 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-30 10:34:14,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:14,884 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 10:34:14,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 10:34:14,885 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 10:34:14,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 10:34:14,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:14,885 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-30 10:34:14,886 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:14,886 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:14,886 INFO L82 PathProgramCache]: Analyzing trace with hash -2027113978, now seen corresponding path program 37 times [2018-09-30 10:34:14,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:14,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:14,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:14,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:14,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:15,863 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:15,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:34:15,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:15,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:15,929 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:15,949 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:15,949 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-09-30 10:34:15,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 10:34:15,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 10:34:15,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-30 10:34:15,950 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-09-30 10:34:16,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:16,021 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-30 10:34:16,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 10:34:16,021 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-09-30 10:34:16,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:16,022 INFO L225 Difference]: With dead ends: 44 [2018-09-30 10:34:16,022 INFO L226 Difference]: Without dead ends: 42 [2018-09-30 10:34:16,023 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 [2018-09-30 10:34:16,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-30 10:34:16,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-30 10:34:16,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-30 10:34:16,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-30 10:34:16,026 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-30 10:34:16,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:16,026 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-30 10:34:16,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 10:34:16,026 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-30 10:34:16,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-30 10:34:16,027 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:16,027 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-30 10:34:16,027 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:16,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:16,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972256, now seen corresponding path program 38 times [2018-09-30 10:34:16,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:16,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:16,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:16,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:16,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:16,754 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:16,754 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 [2018-09-30 10:34:16,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:16,796 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:16,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:16,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:16,879 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:16,880 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-09-30 10:34:16,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 10:34:16,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 10:34:16,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:34:16,881 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-30 10:34:17,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:17,031 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 10:34:17,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 10:34:17,031 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-30 10:34:17,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:17,032 INFO L225 Difference]: With dead ends: 45 [2018-09-30 10:34:17,032 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 10:34:17,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-30 10:34:17,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 10:34:17,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 10:34:17,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 10:34:17,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 10:34:17,036 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-30 10:34:17,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:17,036 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 10:34:17,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 10:34:17,036 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 10:34:17,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 10:34:17,036 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:17,037 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-30 10:34:17,037 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:17,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:17,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495814, now seen corresponding path program 39 times [2018-09-30 10:34:17,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:17,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:17,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:17,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:17,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:17,873 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:17,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:34:17,882 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:17,915 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-30 10:34:17,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:17,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:17,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:17,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-09-30 10:34:17,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 10:34:17,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 10:34:17,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:34:17,952 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-09-30 10:34:18,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:18,029 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-30 10:34:18,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 10:34:18,030 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-09-30 10:34:18,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:18,031 INFO L225 Difference]: With dead ends: 46 [2018-09-30 10:34:18,031 INFO L226 Difference]: Without dead ends: 44 [2018-09-30 10:34:18,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-30 10:34:18,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-30 10:34:18,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-30 10:34:18,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-30 10:34:18,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-30 10:34:18,036 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-30 10:34:18,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:18,036 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-30 10:34:18,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 10:34:18,036 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-30 10:34:18,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-30 10:34:18,037 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:18,037 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-30 10:34:18,037 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:18,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:18,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791520, now seen corresponding path program 40 times [2018-09-30 10:34:18,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:18,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:18,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:18,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:18,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:18,934 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:18,935 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:18,935 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 [2018-09-30 10:34:18,943 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:18,970 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:18,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:18,972 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:18,990 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:19,010 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:19,010 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-09-30 10:34:19,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 10:34:19,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 10:34:19,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:34:19,011 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-30 10:34:19,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:19,104 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 10:34:19,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 10:34:19,108 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-30 10:34:19,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:19,108 INFO L225 Difference]: With dead ends: 47 [2018-09-30 10:34:19,108 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 10:34:19,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-30 10:34:19,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 10:34:19,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 10:34:19,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 10:34:19,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 10:34:19,111 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-30 10:34:19,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:19,112 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 10:34:19,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 10:34:19,112 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 10:34:19,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 10:34:19,112 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:19,113 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-30 10:34:19,113 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:19,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:19,113 INFO L82 PathProgramCache]: Analyzing trace with hash -692041594, now seen corresponding path program 41 times [2018-09-30 10:34:19,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:19,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:19,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:19,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:19,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:20,764 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:20,764 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:34:20,771 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:20,805 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-30 10:34:20,805 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:20,807 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:20,832 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:20,852 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:20,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-09-30 10:34:20,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 10:34:20,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 10:34:20,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:34:20,853 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-09-30 10:34:20,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:20,925 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-30 10:34:20,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 10:34:20,927 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-09-30 10:34:20,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:20,927 INFO L225 Difference]: With dead ends: 48 [2018-09-30 10:34:20,927 INFO L226 Difference]: Without dead ends: 46 [2018-09-30 10:34:20,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-30 10:34:20,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-30 10:34:20,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-30 10:34:20,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-30 10:34:20,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-30 10:34:20,930 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-30 10:34:20,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:20,930 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-30 10:34:20,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 10:34:20,930 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-30 10:34:20,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-30 10:34:20,931 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:20,931 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-30 10:34:20,931 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:20,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:20,931 INFO L82 PathProgramCache]: Analyzing trace with hash 21543200, now seen corresponding path program 42 times [2018-09-30 10:34:20,931 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:20,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:20,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:20,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:20,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:21,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:21,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:34:21,811 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:21,843 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-30 10:34:21,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:21,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:21,887 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:21,888 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-09-30 10:34:21,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 10:34:21,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 10:34:21,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:34:21,889 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-30 10:34:21,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:21,966 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 10:34:21,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 10:34:21,966 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-30 10:34:21,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:21,967 INFO L225 Difference]: With dead ends: 49 [2018-09-30 10:34:21,967 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 10:34:21,968 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-30 10:34:21,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 10:34:21,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 10:34:21,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 10:34:21,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 10:34:21,971 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-30 10:34:21,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:21,972 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 10:34:21,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 10:34:21,972 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 10:34:21,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 10:34:21,972 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:21,972 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-30 10:34:21,972 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:21,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:21,972 INFO L82 PathProgramCache]: Analyzing trace with hash 667835334, now seen corresponding path program 43 times [2018-09-30 10:34:21,973 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:21,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:21,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:21,973 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:21,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:22,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:22,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:34:22,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:22,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:23,011 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:23,011 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-09-30 10:34:23,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 10:34:23,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 10:34:23,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-30 10:34:23,013 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-09-30 10:34:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:23,128 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-30 10:34:23,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 10:34:23,129 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-09-30 10:34:23,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:23,130 INFO L225 Difference]: With dead ends: 50 [2018-09-30 10:34:23,130 INFO L226 Difference]: Without dead ends: 48 [2018-09-30 10:34:23,130 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 [2018-09-30 10:34:23,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-30 10:34:23,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-30 10:34:23,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-30 10:34:23,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-30 10:34:23,133 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-30 10:34:23,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:23,133 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-30 10:34:23,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 10:34:23,134 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-30 10:34:23,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-30 10:34:23,134 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:23,134 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-30 10:34:23,134 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:23,134 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:23,135 INFO L82 PathProgramCache]: Analyzing trace with hash -771944992, now seen corresponding path program 44 times [2018-09-30 10:34:23,135 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:23,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:23,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:23,136 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:23,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:24,345 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:24,345 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 [2018-09-30 10:34:24,353 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:24,378 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:24,379 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:24,382 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:24,454 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:24,455 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2018-09-30 10:34:24,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 10:34:24,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 10:34:24,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:34:24,455 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-30 10:34:24,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:24,538 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 10:34:24,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 10:34:24,538 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-30 10:34:24,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:24,539 INFO L225 Difference]: With dead ends: 51 [2018-09-30 10:34:24,539 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 10:34:24,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-30 10:34:24,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 10:34:24,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 10:34:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 10:34:24,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 10:34:24,543 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-30 10:34:24,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:24,543 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 10:34:24,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 10:34:24,544 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 10:34:24,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 10:34:24,544 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:24,544 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-30 10:34:24,544 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:24,545 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:24,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505158, now seen corresponding path program 45 times [2018-09-30 10:34:24,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:24,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:24,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:24,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:24,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:25,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:25,872 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:25,872 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:34:25,881 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:25,914 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-30 10:34:25,914 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:25,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:25,971 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:25,971 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-09-30 10:34:25,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 10:34:25,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 10:34:25,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:34:25,972 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-09-30 10:34:26,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:26,532 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-30 10:34:26,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 10:34:26,532 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-09-30 10:34:26,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:26,533 INFO L225 Difference]: With dead ends: 52 [2018-09-30 10:34:26,533 INFO L226 Difference]: Without dead ends: 50 [2018-09-30 10:34:26,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-30 10:34:26,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-30 10:34:26,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-30 10:34:26,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-30 10:34:26,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-30 10:34:26,536 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-30 10:34:26,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:26,537 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-30 10:34:26,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 10:34:26,537 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-30 10:34:26,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-30 10:34:26,537 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:26,537 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-30 10:34:26,537 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:26,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:26,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081184, now seen corresponding path program 46 times [2018-09-30 10:34:26,538 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:26,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:26,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:26,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:26,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:27,753 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:27,753 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 [2018-09-30 10:34:27,760 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:27,788 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:27,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:27,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:27,838 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:27,838 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2018-09-30 10:34:27,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 10:34:27,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 10:34:27,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:34:27,839 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-30 10:34:28,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:28,097 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 10:34:28,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 10:34:28,097 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-30 10:34:28,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:28,098 INFO L225 Difference]: With dead ends: 53 [2018-09-30 10:34:28,098 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 10:34:28,099 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-30 10:34:28,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 10:34:28,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 10:34:28,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 10:34:28,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 10:34:28,101 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-30 10:34:28,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:28,102 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 10:34:28,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 10:34:28,102 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 10:34:28,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 10:34:28,102 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:28,102 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-30 10:34:28,102 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:28,102 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:28,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192826, now seen corresponding path program 47 times [2018-09-30 10:34:28,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:28,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:28,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:28,103 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:28,103 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:29,156 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:29,156 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 [2018-09-30 10:34:29,163 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:29,204 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-30 10:34:29,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:29,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:29,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:29,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-09-30 10:34:29,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 10:34:29,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 10:34:29,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-30 10:34:29,245 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-09-30 10:34:29,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:29,333 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-30 10:34:29,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 10:34:29,341 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-09-30 10:34:29,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:29,341 INFO L225 Difference]: With dead ends: 54 [2018-09-30 10:34:29,341 INFO L226 Difference]: Without dead ends: 52 [2018-09-30 10:34:29,342 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 [2018-09-30 10:34:29,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-30 10:34:29,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-30 10:34:29,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-30 10:34:29,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-30 10:34:29,345 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-30 10:34:29,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:29,345 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-30 10:34:29,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 10:34:29,345 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-30 10:34:29,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-30 10:34:29,346 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:29,346 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-30 10:34:29,346 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:29,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:29,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593376, now seen corresponding path program 48 times [2018-09-30 10:34:29,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:29,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:29,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:29,347 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:29,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:30,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:30,746 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:30,747 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 [2018-09-30 10:34:30,753 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:30,808 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 10:34:30,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:30,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:30,886 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:30,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2018-09-30 10:34:30,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 10:34:30,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 10:34:30,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:34:30,888 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-30 10:34:31,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:31,030 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 10:34:31,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 10:34:31,031 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-30 10:34:31,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:31,032 INFO L225 Difference]: With dead ends: 55 [2018-09-30 10:34:31,032 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 10:34:31,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-30 10:34:31,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 10:34:31,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 10:34:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 10:34:31,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 10:34:31,035 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-30 10:34:31,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:31,036 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 10:34:31,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 10:34:31,036 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 10:34:31,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 10:34:31,036 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:31,037 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-30 10:34:31,037 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:31,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:31,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1250314874, now seen corresponding path program 49 times [2018-09-30 10:34:31,037 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:31,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:31,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:31,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:31,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:31,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:32,833 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:32,833 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 [2018-09-30 10:34:32,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:32,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:32,917 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:32,917 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2018-09-30 10:34:32,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 10:34:32,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 10:34:32,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:34:32,918 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-09-30 10:34:33,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:33,014 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-30 10:34:33,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 10:34:33,014 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-09-30 10:34:33,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:33,015 INFO L225 Difference]: With dead ends: 56 [2018-09-30 10:34:33,015 INFO L226 Difference]: Without dead ends: 54 [2018-09-30 10:34:33,016 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-30 10:34:33,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-30 10:34:33,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-30 10:34:33,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-30 10:34:33,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-30 10:34:33,019 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-30 10:34:33,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:33,020 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-30 10:34:33,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 10:34:33,020 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-30 10:34:33,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-30 10:34:33,020 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:33,020 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-30 10:34:33,020 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:33,021 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:33,021 INFO L82 PathProgramCache]: Analyzing trace with hash -105059296, now seen corresponding path program 50 times [2018-09-30 10:34:33,021 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:33,021 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:33,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:33,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:33,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:34,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:34,159 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 [2018-09-30 10:34:34,167 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:34,219 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:34,220 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:34,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:34,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:34,364 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:34,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2018-09-30 10:34:34,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 10:34:34,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 10:34:34,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:34:34,365 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-30 10:34:34,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:34,509 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 10:34:34,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 10:34:34,509 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-30 10:34:34,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:34,510 INFO L225 Difference]: With dead ends: 57 [2018-09-30 10:34:34,510 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 10:34:34,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-30 10:34:34,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 10:34:34,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 10:34:34,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 10:34:34,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 10:34:34,513 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-30 10:34:34,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:34,514 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 10:34:34,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 10:34:34,514 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 10:34:34,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 10:34:34,514 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:34,514 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-30 10:34:34,515 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:34,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:34,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125254, now seen corresponding path program 51 times [2018-09-30 10:34:34,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:34,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:34,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:34,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:34,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:36,152 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:36,153 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 [2018-09-30 10:34:36,160 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:36,199 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-30 10:34:36,200 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:36,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:36,245 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:36,245 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2018-09-30 10:34:36,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 10:34:36,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 10:34:36,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:34:36,246 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-09-30 10:34:36,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:36,357 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-30 10:34:36,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 10:34:36,358 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-09-30 10:34:36,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:36,359 INFO L225 Difference]: With dead ends: 58 [2018-09-30 10:34:36,359 INFO L226 Difference]: Without dead ends: 56 [2018-09-30 10:34:36,360 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-30 10:34:36,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-30 10:34:36,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-30 10:34:36,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-30 10:34:36,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-30 10:34:36,363 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-30 10:34:36,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:36,363 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-30 10:34:36,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 10:34:36,364 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-30 10:34:36,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-30 10:34:36,364 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:36,364 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-30 10:34:36,364 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:36,365 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:36,365 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107936, now seen corresponding path program 52 times [2018-09-30 10:34:36,365 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:36,365 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:36,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:36,366 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:36,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:37,616 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:37,617 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 [2018-09-30 10:34:37,624 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:37,657 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:37,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:37,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:37,701 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:37,701 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2018-09-30 10:34:37,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 10:34:37,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 10:34:37,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:34:37,702 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-30 10:34:37,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:37,803 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 10:34:37,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 10:34:37,804 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-30 10:34:37,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:37,805 INFO L225 Difference]: With dead ends: 59 [2018-09-30 10:34:37,805 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 10:34:37,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-30 10:34:37,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 10:34:37,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 10:34:37,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 10:34:37,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 10:34:37,808 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-30 10:34:37,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:37,808 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 10:34:37,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 10:34:37,809 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 10:34:37,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 10:34:37,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:37,809 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-30 10:34:37,809 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:37,809 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:37,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832710, now seen corresponding path program 53 times [2018-09-30 10:34:37,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:37,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:37,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:37,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:37,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:39,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:39,047 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 [2018-09-30 10:34:39,055 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:39,099 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-30 10:34:39,100 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:39,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:39,152 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:39,152 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2018-09-30 10:34:39,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 10:34:39,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 10:34:39,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-30 10:34:39,154 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-09-30 10:34:39,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:39,297 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-30 10:34:39,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 10:34:39,298 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-09-30 10:34:39,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:39,299 INFO L225 Difference]: With dead ends: 60 [2018-09-30 10:34:39,299 INFO L226 Difference]: Without dead ends: 58 [2018-09-30 10:34:39,300 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 [2018-09-30 10:34:39,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-30 10:34:39,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-30 10:34:39,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-30 10:34:39,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-30 10:34:39,302 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-30 10:34:39,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:39,302 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-30 10:34:39,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 10:34:39,302 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-30 10:34:39,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-30 10:34:39,303 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:39,303 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-30 10:34:39,303 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:39,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:39,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895520, now seen corresponding path program 54 times [2018-09-30 10:34:39,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:39,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:39,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:39,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:39,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:40,691 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:40,691 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 [2018-09-30 10:34:40,698 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:40,742 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-30 10:34:40,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:40,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:40,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:40,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:40,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2018-09-30 10:34:40,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 10:34:40,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 10:34:40,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-30 10:34:40,797 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-30 10:34:40,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:40,990 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 10:34:40,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 10:34:40,991 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-30 10:34:40,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:40,991 INFO L225 Difference]: With dead ends: 61 [2018-09-30 10:34:40,991 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 10:34:40,991 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 [2018-09-30 10:34:40,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 10:34:40,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 10:34:40,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 10:34:40,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 10:34:40,994 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-30 10:34:40,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:40,994 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 10:34:40,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 10:34:40,994 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 10:34:40,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 10:34:40,995 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:40,995 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-30 10:34:40,995 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:40,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:40,995 INFO L82 PathProgramCache]: Analyzing trace with hash -836059322, now seen corresponding path program 55 times [2018-09-30 10:34:40,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:40,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:40,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:40,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:40,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:42,465 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:42,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:34:42,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:42,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:42,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:42,583 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:42,583 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2018-09-30 10:34:42,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 10:34:42,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 10:34:42,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:34:42,584 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-09-30 10:34:42,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:42,710 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-30 10:34:42,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 10:34:42,710 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-09-30 10:34:42,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:42,711 INFO L225 Difference]: With dead ends: 62 [2018-09-30 10:34:42,711 INFO L226 Difference]: Without dead ends: 60 [2018-09-30 10:34:42,712 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-30 10:34:42,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-30 10:34:42,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-30 10:34:42,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-30 10:34:42,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-30 10:34:42,715 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-30 10:34:42,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:42,716 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-30 10:34:42,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 10:34:42,716 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-30 10:34:42,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-30 10:34:42,716 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:42,717 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-30 10:34:42,717 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:42,717 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:42,717 INFO L82 PathProgramCache]: Analyzing trace with hash -148039072, now seen corresponding path program 56 times [2018-09-30 10:34:42,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:42,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:42,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:42,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:42,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:42,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:44,161 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:44,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:34:44,169 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:44,199 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:44,199 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:44,201 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:44,241 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:44,241 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2018-09-30 10:34:44,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 10:34:44,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 10:34:44,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:34:44,243 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-30 10:34:44,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:44,323 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 10:34:44,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 10:34:44,324 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-30 10:34:44,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:44,324 INFO L225 Difference]: With dead ends: 63 [2018-09-30 10:34:44,325 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 10:34:44,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-30 10:34:44,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 10:34:44,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 10:34:44,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 10:34:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 10:34:44,328 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-30 10:34:44,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:44,329 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 10:34:44,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 10:34:44,329 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 10:34:44,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 10:34:44,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:44,330 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-30 10:34:44,330 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:44,330 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:44,330 INFO L82 PathProgramCache]: Analyzing trace with hash -294247802, now seen corresponding path program 57 times [2018-09-30 10:34:44,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:44,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:44,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:44,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:44,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:46,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:46,226 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:46,226 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 [2018-09-30 10:34:46,235 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:34:46,278 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-30 10:34:46,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:46,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:46,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:46,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:46,340 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2018-09-30 10:34:46,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 10:34:46,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 10:34:46,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 10:34:46,341 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-09-30 10:34:46,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:46,696 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-30 10:34:46,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 10:34:46,696 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-09-30 10:34:46,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:46,697 INFO L225 Difference]: With dead ends: 64 [2018-09-30 10:34:46,697 INFO L226 Difference]: Without dead ends: 62 [2018-09-30 10:34:46,698 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-30 10:34:46,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-30 10:34:46,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-30 10:34:46,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-30 10:34:46,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-30 10:34:46,701 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-30 10:34:46,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:46,701 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-30 10:34:46,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 10:34:46,702 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-30 10:34:46,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-30 10:34:46,702 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:46,702 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-30 10:34:46,702 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:46,702 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:46,702 INFO L82 PathProgramCache]: Analyzing trace with hash -531751136, now seen corresponding path program 58 times [2018-09-30 10:34:46,702 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:46,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:46,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:46,703 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:46,703 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:49,028 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:49,028 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 [2018-09-30 10:34:49,037 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:34:49,072 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:34:49,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:49,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:49,136 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:49,137 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2018-09-30 10:34:49,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 10:34:49,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 10:34:49,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:34:49,138 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-30 10:34:49,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:49,245 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 10:34:49,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 10:34:49,246 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-30 10:34:49,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:49,246 INFO L225 Difference]: With dead ends: 65 [2018-09-30 10:34:49,246 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 10:34:49,247 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-30 10:34:49,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 10:34:49,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 10:34:49,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 10:34:49,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 10:34:49,250 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-30 10:34:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:49,250 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 10:34:49,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 10:34:49,251 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 10:34:49,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 10:34:49,251 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:49,251 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-30 10:34:49,251 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:49,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:49,251 INFO L82 PathProgramCache]: Analyzing trace with hash 695580102, now seen corresponding path program 59 times [2018-09-30 10:34:49,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:49,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:49,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:49,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:49,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:51,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:51,216 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:51,216 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:34:51,226 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:34:51,288 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-30 10:34:51,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:51,291 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:51,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:51,348 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:51,349 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2018-09-30 10:34:51,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 10:34:51,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 10:34:51,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 10:34:51,350 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-09-30 10:34:51,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:51,613 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-30 10:34:51,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 10:34:51,613 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-09-30 10:34:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:51,614 INFO L225 Difference]: With dead ends: 66 [2018-09-30 10:34:51,614 INFO L226 Difference]: Without dead ends: 64 [2018-09-30 10:34:51,614 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-30 10:34:51,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-30 10:34:51,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-30 10:34:51,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-30 10:34:51,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-30 10:34:51,616 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-30 10:34:51,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:51,617 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-30 10:34:51,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 10:34:51,617 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-30 10:34:51,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-30 10:34:51,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:51,617 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-30 10:34:51,617 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:51,617 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:51,618 INFO L82 PathProgramCache]: Analyzing trace with hash 88142816, now seen corresponding path program 60 times [2018-09-30 10:34:51,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:51,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:51,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:51,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:51,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:53,829 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:53,829 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:34:53,838 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:34:53,886 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 10:34:53,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:53,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:53,937 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:53,937 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2018-09-30 10:34:53,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 10:34:53,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 10:34:53,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 10:34:53,938 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-30 10:34:54,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:54,037 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 10:34:54,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 10:34:54,038 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-30 10:34:54,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:54,038 INFO L225 Difference]: With dead ends: 67 [2018-09-30 10:34:54,039 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 10:34:54,039 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-30 10:34:54,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 10:34:54,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 10:34:54,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 10:34:54,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 10:34:54,042 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-30 10:34:54,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:54,042 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 10:34:54,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 10:34:54,043 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 10:34:54,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 10:34:54,043 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:54,043 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-30 10:34:54,043 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:54,043 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:54,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543866, now seen corresponding path program 61 times [2018-09-30 10:34:54,043 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:54,043 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:54,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:54,044 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:54,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:55,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:55,714 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 [2018-09-30 10:34:55,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:55,756 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:55,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:55,794 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2018-09-30 10:34:55,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 10:34:55,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 10:34:55,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:34:55,796 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-09-30 10:34:55,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:55,897 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-30 10:34:55,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 10:34:55,898 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-09-30 10:34:55,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:55,899 INFO L225 Difference]: With dead ends: 68 [2018-09-30 10:34:55,899 INFO L226 Difference]: Without dead ends: 66 [2018-09-30 10:34:55,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-30 10:34:55,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-30 10:34:55,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-30 10:34:55,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-30 10:34:55,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-30 10:34:55,902 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-30 10:34:55,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:55,903 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-30 10:34:55,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 10:34:55,903 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-30 10:34:55,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-30 10:34:55,903 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:55,904 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-30 10:34:55,904 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:55,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:55,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223456, now seen corresponding path program 62 times [2018-09-30 10:34:55,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:55,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:55,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:55,905 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:34:55,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:34:57,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:57,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:34:57,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:34:57,963 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:34:57,999 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:34:57,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:34:58,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:34:58,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:34:58,058 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:34:58,059 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2018-09-30 10:34:58,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 10:34:58,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 10:34:58,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:34:58,060 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-30 10:34:58,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:34:58,281 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 10:34:58,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 10:34:58,281 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-30 10:34:58,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:34:58,282 INFO L225 Difference]: With dead ends: 69 [2018-09-30 10:34:58,282 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 10:34:58,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-30 10:34:58,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 10:34:58,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 10:34:58,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 10:34:58,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 10:34:58,286 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-30 10:34:58,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:34:58,287 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 10:34:58,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 10:34:58,287 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 10:34:58,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 10:34:58,287 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:34:58,287 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-30 10:34:58,288 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:34:58,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:34:58,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774662, now seen corresponding path program 63 times [2018-09-30 10:34:58,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:34:58,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:34:58,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:58,289 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:34:58,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:34:58,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:00,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:00,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:00,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:35:00,024 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:35:00,140 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-30 10:35:00,140 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:00,143 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:00,239 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:00,239 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2018-09-30 10:35:00,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 10:35:00,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 10:35:00,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 10:35:00,240 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-09-30 10:35:00,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:00,358 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-30 10:35:00,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 10:35:00,365 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-09-30 10:35:00,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:00,365 INFO L225 Difference]: With dead ends: 70 [2018-09-30 10:35:00,365 INFO L226 Difference]: Without dead ends: 68 [2018-09-30 10:35:00,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-30 10:35:00,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-30 10:35:00,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-30 10:35:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-30 10:35:00,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-30 10:35:00,369 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-30 10:35:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:00,370 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-30 10:35:00,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 10:35:00,370 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-30 10:35:00,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-30 10:35:00,371 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:00,371 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-30 10:35:00,371 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:00,371 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:00,371 INFO L82 PathProgramCache]: Analyzing trace with hash -892596896, now seen corresponding path program 64 times [2018-09-30 10:35:00,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:00,372 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:00,372 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:00,372 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:00,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:02,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:02,822 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 [2018-09-30 10:35:02,830 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:35:02,871 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:35:02,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:02,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:02,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:02,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2018-09-30 10:35:02,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 10:35:02,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 10:35:02,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:35:02,932 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-30 10:35:03,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:03,133 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 10:35:03,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 10:35:03,134 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-30 10:35:03,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:03,134 INFO L225 Difference]: With dead ends: 71 [2018-09-30 10:35:03,135 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 10:35:03,135 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-30 10:35:03,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 10:35:03,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 10:35:03,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 10:35:03,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 10:35:03,138 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-30 10:35:03,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:03,139 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 10:35:03,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 10:35:03,139 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 10:35:03,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 10:35:03,139 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:03,139 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-30 10:35:03,139 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:03,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:03,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703866, now seen corresponding path program 65 times [2018-09-30 10:35:03,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:03,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:03,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:03,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:03,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:04,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:04,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:04,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:35:04,965 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:35:05,019 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-30 10:35:05,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:05,022 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:05,067 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:05,067 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2018-09-30 10:35:05,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 10:35:05,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 10:35:05,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 10:35:05,069 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-09-30 10:35:05,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:05,201 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-30 10:35:05,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 10:35:05,201 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-09-30 10:35:05,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:05,202 INFO L225 Difference]: With dead ends: 72 [2018-09-30 10:35:05,202 INFO L226 Difference]: Without dead ends: 70 [2018-09-30 10:35:05,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-30 10:35:05,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-30 10:35:05,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-30 10:35:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-30 10:35:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-30 10:35:05,206 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-30 10:35:05,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:05,206 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-30 10:35:05,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 10:35:05,206 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-30 10:35:05,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-30 10:35:05,207 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:05,207 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-30 10:35:05,207 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:05,207 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:05,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718432, now seen corresponding path program 66 times [2018-09-30 10:35:05,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:05,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:05,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:05,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:05,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:07,311 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:07,311 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:35:07,319 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:35:07,375 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-30 10:35:07,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:07,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:07,507 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:07,507 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2018-09-30 10:35:07,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 10:35:07,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 10:35:07,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:35:07,508 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-30 10:35:07,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:07,801 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 10:35:07,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 10:35:07,802 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-30 10:35:07,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:07,802 INFO L225 Difference]: With dead ends: 73 [2018-09-30 10:35:07,803 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 10:35:07,803 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-30 10:35:07,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 10:35:07,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 10:35:07,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 10:35:07,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 10:35:07,806 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-30 10:35:07,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:07,806 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 10:35:07,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 10:35:07,806 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 10:35:07,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 10:35:07,806 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:07,807 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-30 10:35:07,807 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:07,807 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:07,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438138, now seen corresponding path program 67 times [2018-09-30 10:35:07,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:07,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:07,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:07,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:07,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:09,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:09,809 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 [2018-09-30 10:35:09,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:09,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:09,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:09,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2018-09-30 10:35:09,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 10:35:09,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 10:35:09,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 10:35:09,912 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-09-30 10:35:10,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:10,032 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-30 10:35:10,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 10:35:10,032 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-09-30 10:35:10,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:10,033 INFO L225 Difference]: With dead ends: 74 [2018-09-30 10:35:10,033 INFO L226 Difference]: Without dead ends: 72 [2018-09-30 10:35:10,034 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-30 10:35:10,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-30 10:35:10,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-30 10:35:10,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-30 10:35:10,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-30 10:35:10,037 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-30 10:35:10,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:10,037 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-30 10:35:10,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 10:35:10,037 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-30 10:35:10,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-30 10:35:10,038 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:10,038 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-30 10:35:10,038 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:10,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:10,039 INFO L82 PathProgramCache]: Analyzing trace with hash 976119520, now seen corresponding path program 68 times [2018-09-30 10:35:10,039 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:10,039 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:10,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:10,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:10,040 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:12,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:12,357 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:12,357 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 [2018-09-30 10:35:12,364 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:35:12,402 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:35:12,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:12,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:12,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:12,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:12,446 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2018-09-30 10:35:12,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 10:35:12,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 10:35:12,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:35:12,448 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-30 10:35:12,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:12,607 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 10:35:12,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 10:35:12,608 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-30 10:35:12,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:12,609 INFO L225 Difference]: With dead ends: 75 [2018-09-30 10:35:12,609 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 10:35:12,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-30 10:35:12,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 10:35:12,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 10:35:12,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 10:35:12,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 10:35:12,613 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-30 10:35:12,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:12,613 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 10:35:12,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 10:35:12,613 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 10:35:12,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 10:35:12,614 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:12,614 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-30 10:35:12,614 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:12,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:12,615 INFO L82 PathProgramCache]: Analyzing trace with hash 194930182, now seen corresponding path program 69 times [2018-09-30 10:35:12,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:12,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:12,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:12,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:12,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:14,717 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:14,717 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 [2018-09-30 10:35:14,724 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:35:14,799 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-30 10:35:14,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:14,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:14,934 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:14,934 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2018-09-30 10:35:14,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 10:35:14,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 10:35:14,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 10:35:14,935 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-09-30 10:35:16,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:16,221 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-30 10:35:16,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 10:35:16,222 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-09-30 10:35:16,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:16,222 INFO L225 Difference]: With dead ends: 76 [2018-09-30 10:35:16,223 INFO L226 Difference]: Without dead ends: 74 [2018-09-30 10:35:16,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-30 10:35:16,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-30 10:35:16,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-30 10:35:16,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-30 10:35:16,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-30 10:35:16,226 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-30 10:35:16,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:16,226 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-30 10:35:16,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 10:35:16,227 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-30 10:35:16,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-30 10:35:16,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:16,227 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-30 10:35:16,227 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:16,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:16,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864480, now seen corresponding path program 70 times [2018-09-30 10:35:16,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:16,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:16,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:16,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:16,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:18,591 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:18,591 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 [2018-09-30 10:35:18,598 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:35:18,639 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:35:18,639 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:18,642 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:18,697 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:18,697 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2018-09-30 10:35:18,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 10:35:18,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 10:35:18,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:35:18,698 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-30 10:35:18,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:18,864 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 10:35:18,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 10:35:18,865 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-30 10:35:18,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:18,865 INFO L225 Difference]: With dead ends: 77 [2018-09-30 10:35:18,866 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 10:35:18,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-30 10:35:18,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 10:35:18,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 10:35:18,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 10:35:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 10:35:18,870 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-30 10:35:18,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:18,870 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 10:35:18,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 10:35:18,870 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 10:35:18,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 10:35:18,871 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:18,871 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-30 10:35:18,871 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:18,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:18,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779834, now seen corresponding path program 71 times [2018-09-30 10:35:18,871 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:18,871 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:18,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:18,872 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:18,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:21,576 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:21,576 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 [2018-09-30 10:35:21,583 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:35:21,652 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-30 10:35:21,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:21,655 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:21,709 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:21,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2018-09-30 10:35:21,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 10:35:21,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 10:35:21,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 10:35:21,711 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-09-30 10:35:21,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:21,904 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-30 10:35:21,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 10:35:21,904 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-09-30 10:35:21,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:21,905 INFO L225 Difference]: With dead ends: 78 [2018-09-30 10:35:21,905 INFO L226 Difference]: Without dead ends: 76 [2018-09-30 10:35:21,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-30 10:35:21,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-30 10:35:21,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-30 10:35:21,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-30 10:35:21,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-30 10:35:21,909 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-30 10:35:21,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:21,909 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-30 10:35:21,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 10:35:21,909 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-30 10:35:21,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-30 10:35:21,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:21,910 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-30 10:35:21,910 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:21,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:21,911 INFO L82 PathProgramCache]: Analyzing trace with hash 365428832, now seen corresponding path program 72 times [2018-09-30 10:35:21,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:21,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:21,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:21,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:21,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:24,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:24,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:35:24,227 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:35:24,294 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 10:35:24,294 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:24,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:24,352 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:24,352 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2018-09-30 10:35:24,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 10:35:24,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 10:35:24,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 10:35:24,353 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-30 10:35:24,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:24,467 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 10:35:24,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 10:35:24,467 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-30 10:35:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:24,468 INFO L225 Difference]: With dead ends: 79 [2018-09-30 10:35:24,469 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 10:35:24,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-30 10:35:24,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 10:35:24,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 10:35:24,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 10:35:24,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 10:35:24,473 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-30 10:35:24,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:24,473 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 10:35:24,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 10:35:24,473 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 10:35:24,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 10:35:24,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:24,474 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-30 10:35:24,474 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:24,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:24,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1556611962, now seen corresponding path program 73 times [2018-09-30 10:35:24,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:24,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:24,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:24,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:24,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:26,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:26,819 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 [2018-09-30 10:35:26,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:26,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:26,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:26,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2018-09-30 10:35:26,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 10:35:26,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 10:35:26,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 10:35:26,932 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-09-30 10:35:27,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:27,170 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-30 10:35:27,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 10:35:27,171 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-09-30 10:35:27,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:27,172 INFO L225 Difference]: With dead ends: 80 [2018-09-30 10:35:27,172 INFO L226 Difference]: Without dead ends: 78 [2018-09-30 10:35:27,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-30 10:35:27,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-30 10:35:27,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-30 10:35:27,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-30 10:35:27,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-30 10:35:27,175 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-30 10:35:27,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:27,176 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-30 10:35:27,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 10:35:27,176 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-30 10:35:27,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-30 10:35:27,176 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:27,176 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-30 10:35:27,177 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:27,177 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:27,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334432, now seen corresponding path program 74 times [2018-09-30 10:35:27,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:27,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:27,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:27,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:27,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:29,607 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:29,607 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 [2018-09-30 10:35:29,614 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:35:29,658 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:35:29,658 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:29,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:29,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:29,703 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2018-09-30 10:35:29,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 10:35:29,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 10:35:29,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:35:29,704 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-30 10:35:29,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:29,868 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 10:35:29,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 10:35:29,869 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-30 10:35:29,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:29,869 INFO L225 Difference]: With dead ends: 81 [2018-09-30 10:35:29,869 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 10:35:29,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-30 10:35:29,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 10:35:29,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 10:35:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 10:35:29,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 10:35:29,872 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-30 10:35:29,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:29,873 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 10:35:29,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 10:35:29,873 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 10:35:29,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 10:35:29,873 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:29,873 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-30 10:35:29,874 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:29,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:29,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600186, now seen corresponding path program 75 times [2018-09-30 10:35:29,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:29,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:29,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:29,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:29,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:32,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:32,572 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:32,572 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:35:32,579 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:35:32,649 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-30 10:35:32,649 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:32,652 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:32,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:32,702 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:32,702 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2018-09-30 10:35:32,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 10:35:32,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 10:35:32,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 10:35:32,704 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-09-30 10:35:32,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:32,825 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-30 10:35:32,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 10:35:32,826 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-09-30 10:35:32,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:32,827 INFO L225 Difference]: With dead ends: 82 [2018-09-30 10:35:32,827 INFO L226 Difference]: Without dead ends: 80 [2018-09-30 10:35:32,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2018-09-30 10:35:32,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-30 10:35:32,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-30 10:35:32,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-30 10:35:32,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-30 10:35:32,831 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-30 10:35:32,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:32,831 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-30 10:35:32,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 10:35:32,832 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-30 10:35:32,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-30 10:35:32,832 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:32,832 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-30 10:35:32,833 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:32,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:32,833 INFO L82 PathProgramCache]: Analyzing trace with hash -268903968, now seen corresponding path program 76 times [2018-09-30 10:35:32,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:32,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:32,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:32,834 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:32,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:35,299 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:35,299 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:35:35,305 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:35:35,348 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:35:35,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:35,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:35,408 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:35,408 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2018-09-30 10:35:35,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 10:35:35,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 10:35:35,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 10:35:35,410 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-30 10:35:36,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:36,414 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 10:35:36,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 10:35:36,414 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-30 10:35:36,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:36,415 INFO L225 Difference]: With dead ends: 83 [2018-09-30 10:35:36,415 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 10:35:36,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2018-09-30 10:35:36,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 10:35:36,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 10:35:36,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 10:35:36,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 10:35:36,419 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-30 10:35:36,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:36,419 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 10:35:36,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 10:35:36,419 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 10:35:36,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 10:35:36,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:36,420 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-30 10:35:36,420 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:36,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:36,421 INFO L82 PathProgramCache]: Analyzing trace with hash 253907718, now seen corresponding path program 77 times [2018-09-30 10:35:36,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:36,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:36,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:36,421 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:36,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:39,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:39,040 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 [2018-09-30 10:35:39,049 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:35:39,113 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-30 10:35:39,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:39,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:39,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:39,161 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:39,161 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2018-09-30 10:35:39,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 10:35:39,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 10:35:39,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 10:35:39,163 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-09-30 10:35:39,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:39,283 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-30 10:35:39,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 10:35:39,283 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-09-30 10:35:39,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:39,284 INFO L225 Difference]: With dead ends: 84 [2018-09-30 10:35:39,284 INFO L226 Difference]: Without dead ends: 82 [2018-09-30 10:35:39,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2018-09-30 10:35:39,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-30 10:35:39,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-30 10:35:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-30 10:35:39,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-30 10:35:39,288 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-30 10:35:39,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:39,289 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-30 10:35:39,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 10:35:39,289 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-30 10:35:39,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-30 10:35:39,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:39,289 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-30 10:35:39,290 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:39,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:39,290 INFO L82 PathProgramCache]: Analyzing trace with hash -718799200, now seen corresponding path program 78 times [2018-09-30 10:35:39,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:39,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:39,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:39,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:39,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:41,927 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:41,927 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 [2018-09-30 10:35:41,934 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:35:42,001 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-30 10:35:42,002 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:42,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:42,117 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:42,117 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2018-09-30 10:35:42,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 10:35:42,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 10:35:42,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 10:35:42,119 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-30 10:35:42,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:42,385 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 10:35:42,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 10:35:42,385 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-30 10:35:42,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:42,386 INFO L225 Difference]: With dead ends: 85 [2018-09-30 10:35:42,386 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 10:35:42,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2018-09-30 10:35:42,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 10:35:42,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 10:35:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 10:35:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 10:35:42,391 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-30 10:35:42,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:42,391 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 10:35:42,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 10:35:42,391 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 10:35:42,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 10:35:42,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:42,392 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-30 10:35:42,392 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:42,392 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:42,392 INFO L82 PathProgramCache]: Analyzing trace with hash -807942586, now seen corresponding path program 79 times [2018-09-30 10:35:42,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:42,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:42,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:42,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:42,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:45,451 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:45,452 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 [2018-09-30 10:35:45,459 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:45,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:45,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:45,596 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:45,596 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2018-09-30 10:35:45,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 10:35:45,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 10:35:45,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 10:35:45,598 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. [2018-09-30 10:35:45,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:45,778 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-30 10:35:45,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 10:35:45,779 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 82 [2018-09-30 10:35:45,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:45,779 INFO L225 Difference]: With dead ends: 86 [2018-09-30 10:35:45,780 INFO L226 Difference]: Without dead ends: 84 [2018-09-30 10:35:45,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2018-09-30 10:35:45,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-30 10:35:45,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-30 10:35:45,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-30 10:35:45,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-30 10:35:45,782 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-30 10:35:45,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:45,782 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-30 10:35:45,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 10:35:45,783 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-30 10:35:45,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-30 10:35:45,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:45,783 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-30 10:35:45,783 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:45,783 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:45,783 INFO L82 PathProgramCache]: Analyzing trace with hash 723579744, now seen corresponding path program 80 times [2018-09-30 10:35:45,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:45,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:45,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:45,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:35:45,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:49,231 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:49,231 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 [2018-09-30 10:35:49,238 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:35:49,284 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:35:49,284 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:49,287 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:49,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:49,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2018-09-30 10:35:49,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 10:35:49,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 10:35:49,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 10:35:49,397 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-30 10:35:50,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:50,298 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 10:35:50,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 10:35:50,298 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-30 10:35:50,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:50,299 INFO L225 Difference]: With dead ends: 87 [2018-09-30 10:35:50,299 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 10:35:50,300 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2018-09-30 10:35:50,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 10:35:50,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 10:35:50,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 10:35:50,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 10:35:50,303 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-30 10:35:50,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:50,303 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 10:35:50,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 10:35:50,303 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 10:35:50,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 10:35:50,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:50,304 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-30 10:35:50,304 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:50,304 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:50,305 INFO L82 PathProgramCache]: Analyzing trace with hash 956131718, now seen corresponding path program 81 times [2018-09-30 10:35:50,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:50,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:50,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:50,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:50,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:53,637 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:53,637 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 [2018-09-30 10:35:53,644 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:35:53,717 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-30 10:35:53,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:53,720 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:53,780 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:53,780 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2018-09-30 10:35:53,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 10:35:53,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 10:35:53,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 10:35:53,781 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 85 states. [2018-09-30 10:35:53,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:53,983 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-30 10:35:53,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 10:35:53,983 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 84 [2018-09-30 10:35:53,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:53,984 INFO L225 Difference]: With dead ends: 88 [2018-09-30 10:35:53,984 INFO L226 Difference]: Without dead ends: 86 [2018-09-30 10:35:53,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2018-09-30 10:35:53,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-30 10:35:53,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-30 10:35:53,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-30 10:35:53,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-30 10:35:53,988 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-30 10:35:53,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:53,988 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-30 10:35:53,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 10:35:53,989 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-30 10:35:53,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-30 10:35:53,989 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:53,989 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-30 10:35:53,989 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:53,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:53,990 INFO L82 PathProgramCache]: Analyzing trace with hash -424691680, now seen corresponding path program 82 times [2018-09-30 10:35:53,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:53,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:53,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:53,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:53,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:35:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:56,976 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:35:56,976 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 [2018-09-30 10:35:56,984 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:35:57,036 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:35:57,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:35:57,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:35:57,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:35:57,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:35:57,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2018-09-30 10:35:57,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 10:35:57,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 10:35:57,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 10:35:57,133 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-30 10:35:57,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:35:57,812 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 10:35:57,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 10:35:57,812 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-30 10:35:57,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:35:57,813 INFO L225 Difference]: With dead ends: 89 [2018-09-30 10:35:57,813 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 10:35:57,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2018-09-30 10:35:57,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 10:35:57,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 10:35:57,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 10:35:57,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 10:35:57,817 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-30 10:35:57,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:35:57,817 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 10:35:57,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 10:35:57,817 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 10:35:57,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 10:35:57,818 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:35:57,818 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-30 10:35:57,818 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:35:57,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:35:57,818 INFO L82 PathProgramCache]: Analyzing trace with hash -280544058, now seen corresponding path program 83 times [2018-09-30 10:35:57,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:35:57,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:35:57,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:57,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:35:57,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:35:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:00,720 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:00,720 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:36:00,727 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:36:00,803 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-30 10:36:00,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:00,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:00,852 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:00,852 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2018-09-30 10:36:00,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 10:36:00,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 10:36:00,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2018-09-30 10:36:00,853 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 87 states. [2018-09-30 10:36:01,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:01,152 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-30 10:36:01,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 10:36:01,153 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 86 [2018-09-30 10:36:01,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:01,153 INFO L225 Difference]: With dead ends: 90 [2018-09-30 10:36:01,153 INFO L226 Difference]: Without dead ends: 88 [2018-09-30 10:36:01,154 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 [2018-09-30 10:36:01,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-30 10:36:01,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-30 10:36:01,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-30 10:36:01,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-30 10:36:01,157 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-30 10:36:01,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:01,157 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-30 10:36:01,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 10:36:01,157 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-30 10:36:01,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-30 10:36:01,158 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:01,158 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-30 10:36:01,158 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:01,158 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:01,158 INFO L82 PathProgramCache]: Analyzing trace with hash -106935072, now seen corresponding path program 84 times [2018-09-30 10:36:01,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:01,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:01,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:01,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:01,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:04,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:04,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:36:04,456 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:04,529 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 10:36:04,529 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:04,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:04,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:04,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2018-09-30 10:36:04,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 10:36:04,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 10:36:04,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 10:36:04,580 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-30 10:36:04,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:04,808 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 10:36:04,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 10:36:04,808 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-30 10:36:04,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:04,809 INFO L225 Difference]: With dead ends: 91 [2018-09-30 10:36:04,809 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 10:36:04,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2018-09-30 10:36:04,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 10:36:04,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 10:36:04,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 10:36:04,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-30 10:36:04,813 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-30 10:36:04,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:04,813 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-30 10:36:04,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 10:36:04,814 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-30 10:36:04,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 10:36:04,814 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:04,814 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-30 10:36:04,815 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:04,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:04,815 INFO L82 PathProgramCache]: Analyzing trace with hash 979976198, now seen corresponding path program 85 times [2018-09-30 10:36:04,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:04,815 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:04,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:04,816 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:04,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:08,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:08,051 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 [2018-09-30 10:36:08,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:08,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:08,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:08,155 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:08,155 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2018-09-30 10:36:08,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 10:36:08,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 10:36:08,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 10:36:08,157 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 89 states. [2018-09-30 10:36:08,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:08,306 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-30 10:36:08,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 10:36:08,307 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 88 [2018-09-30 10:36:08,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:08,308 INFO L225 Difference]: With dead ends: 92 [2018-09-30 10:36:08,308 INFO L226 Difference]: Without dead ends: 90 [2018-09-30 10:36:08,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2018-09-30 10:36:08,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-30 10:36:08,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-30 10:36:08,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-30 10:36:08,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-30 10:36:08,312 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-30 10:36:08,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:08,312 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-30 10:36:08,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 10:36:08,313 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-30 10:36:08,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-30 10:36:08,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:08,313 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-30 10:36:08,313 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:08,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:08,314 INFO L82 PathProgramCache]: Analyzing trace with hash 314487200, now seen corresponding path program 86 times [2018-09-30 10:36:08,314 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:08,314 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:08,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:08,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:08,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:11,348 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:11,349 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:36:11,365 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:36:11,412 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:36:11,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:11,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:11,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:11,467 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:11,467 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2018-09-30 10:36:11,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 10:36:11,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 10:36:11,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 10:36:11,469 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-30 10:36:11,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:11,692 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 10:36:11,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 10:36:11,693 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-30 10:36:11,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:11,694 INFO L225 Difference]: With dead ends: 93 [2018-09-30 10:36:11,694 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 10:36:11,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2018-09-30 10:36:11,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 10:36:11,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 10:36:11,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 10:36:11,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 10:36:11,697 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-30 10:36:11,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:11,697 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 10:36:11,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 10:36:11,698 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 10:36:11,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 10:36:11,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:11,698 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-30 10:36:11,698 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:11,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:11,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164742, now seen corresponding path program 87 times [2018-09-30 10:36:11,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:11,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:11,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:11,699 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:11,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:15,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:15,021 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 [2018-09-30 10:36:15,028 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:36:15,109 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-30 10:36:15,109 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:15,112 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:15,155 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:15,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2018-09-30 10:36:15,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 10:36:15,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 10:36:15,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 10:36:15,157 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 91 states. [2018-09-30 10:36:15,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:15,304 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-30 10:36:15,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 10:36:15,305 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 90 [2018-09-30 10:36:15,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:15,306 INFO L225 Difference]: With dead ends: 94 [2018-09-30 10:36:15,306 INFO L226 Difference]: Without dead ends: 92 [2018-09-30 10:36:15,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2018-09-30 10:36:15,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-30 10:36:15,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-30 10:36:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-30 10:36:15,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-30 10:36:15,310 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-30 10:36:15,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:15,310 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-30 10:36:15,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 10:36:15,310 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-30 10:36:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-30 10:36:15,310 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:15,310 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-30 10:36:15,311 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:15,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:15,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364768, now seen corresponding path program 88 times [2018-09-30 10:36:15,311 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:15,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:15,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:15,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:15,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:18,815 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:18,815 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 [2018-09-30 10:36:18,822 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:36:18,889 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:36:18,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:18,894 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:19,036 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:19,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2018-09-30 10:36:19,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 10:36:19,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 10:36:19,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 10:36:19,038 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-30 10:36:19,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:19,286 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 10:36:19,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 10:36:19,286 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-30 10:36:19,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:19,287 INFO L225 Difference]: With dead ends: 95 [2018-09-30 10:36:19,287 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 10:36:19,288 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2018-09-30 10:36:19,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 10:36:19,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 10:36:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 10:36:19,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-30 10:36:19,291 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-30 10:36:19,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:19,291 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-30 10:36:19,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 10:36:19,291 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-30 10:36:19,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 10:36:19,292 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:19,292 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-30 10:36:19,292 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:19,292 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:19,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663686, now seen corresponding path program 89 times [2018-09-30 10:36:19,292 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:19,292 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:19,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:19,293 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:19,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:22,646 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:22,646 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 [2018-09-30 10:36:22,653 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:36:22,758 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-30 10:36:22,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:22,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:22,917 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:22,918 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2018-09-30 10:36:22,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 10:36:22,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 10:36:22,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 10:36:22,920 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 93 states. [2018-09-30 10:36:23,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:23,271 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-30 10:36:23,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 10:36:23,272 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 92 [2018-09-30 10:36:23,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:23,273 INFO L225 Difference]: With dead ends: 96 [2018-09-30 10:36:23,273 INFO L226 Difference]: Without dead ends: 94 [2018-09-30 10:36:23,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2018-09-30 10:36:23,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-30 10:36:23,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-30 10:36:23,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-30 10:36:23,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-30 10:36:23,277 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-30 10:36:23,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:23,277 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-30 10:36:23,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 10:36:23,277 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-30 10:36:23,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-30 10:36:23,277 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:23,277 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-30 10:36:23,278 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:23,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:23,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930144, now seen corresponding path program 90 times [2018-09-30 10:36:23,278 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:23,278 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:23,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:23,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:23,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:26,711 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:26,711 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:36:26,719 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:26,809 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-30 10:36:26,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:26,812 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:26,859 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:26,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2018-09-30 10:36:26,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 10:36:26,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 10:36:26,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 10:36:26,861 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-30 10:36:27,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:27,012 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 10:36:27,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 10:36:27,013 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-30 10:36:27,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:27,014 INFO L225 Difference]: With dead ends: 97 [2018-09-30 10:36:27,014 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 10:36:27,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2018-09-30 10:36:27,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 10:36:27,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 10:36:27,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 10:36:27,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 10:36:27,018 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-30 10:36:27,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:27,018 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 10:36:27,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 10:36:27,019 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 10:36:27,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 10:36:27,019 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:27,019 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-30 10:36:27,019 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:27,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:27,020 INFO L82 PathProgramCache]: Analyzing trace with hash 854092230, now seen corresponding path program 91 times [2018-09-30 10:36:27,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:27,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:27,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:27,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:27,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:30,818 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:30,818 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 [2018-09-30 10:36:30,826 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:30,883 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:30,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:30,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:30,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2018-09-30 10:36:30,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 10:36:30,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 10:36:30,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 10:36:30,941 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 95 states. [2018-09-30 10:36:31,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:31,086 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-30 10:36:31,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 10:36:31,086 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 94 [2018-09-30 10:36:31,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:31,087 INFO L225 Difference]: With dead ends: 98 [2018-09-30 10:36:31,087 INFO L226 Difference]: Without dead ends: 96 [2018-09-30 10:36:31,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2018-09-30 10:36:31,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-30 10:36:31,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-30 10:36:31,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-30 10:36:31,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-30 10:36:31,091 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-30 10:36:31,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:31,091 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-30 10:36:31,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 10:36:31,091 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-30 10:36:31,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-30 10:36:31,092 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:31,092 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-30 10:36:31,092 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:31,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:31,092 INFO L82 PathProgramCache]: Analyzing trace with hash 707051488, now seen corresponding path program 92 times [2018-09-30 10:36:31,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:31,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:31,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:31,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:31,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:34,989 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:34,989 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 [2018-09-30 10:36:34,996 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:36:35,049 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:36:35,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:35,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:35,146 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:35,147 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 95 [2018-09-30 10:36:35,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 10:36:35,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 10:36:35,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 10:36:35,148 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-30 10:36:35,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:35,324 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 10:36:35,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 10:36:35,325 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-30 10:36:35,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:35,326 INFO L225 Difference]: With dead ends: 99 [2018-09-30 10:36:35,326 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 10:36:35,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2018-09-30 10:36:35,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 10:36:35,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 10:36:35,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 10:36:35,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-30 10:36:35,329 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-30 10:36:35,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:35,330 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-30 10:36:35,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 10:36:35,330 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-30 10:36:35,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 10:36:35,330 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:35,330 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-30 10:36:35,330 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:35,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:35,331 INFO L82 PathProgramCache]: Analyzing trace with hash 443755782, now seen corresponding path program 93 times [2018-09-30 10:36:35,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:35,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:35,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:35,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:35,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:39,239 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:39,239 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:36:39,245 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:36:39,334 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-30 10:36:39,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:39,337 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:39,395 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:39,395 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2018-09-30 10:36:39,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 10:36:39,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 10:36:39,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 10:36:39,397 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 97 states. [2018-09-30 10:36:39,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:39,572 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-30 10:36:39,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 10:36:39,572 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 96 [2018-09-30 10:36:39,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:39,573 INFO L225 Difference]: With dead ends: 100 [2018-09-30 10:36:39,573 INFO L226 Difference]: Without dead ends: 98 [2018-09-30 10:36:39,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2018-09-30 10:36:39,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-30 10:36:39,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-30 10:36:39,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-30 10:36:39,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-30 10:36:39,577 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-30 10:36:39,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:39,577 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-30 10:36:39,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 10:36:39,578 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-30 10:36:39,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-30 10:36:39,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:39,578 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-30 10:36:39,578 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:39,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:39,579 INFO L82 PathProgramCache]: Analyzing trace with hash 871523488, now seen corresponding path program 94 times [2018-09-30 10:36:39,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:39,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:39,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:39,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:39,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:43,272 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:43,272 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 [2018-09-30 10:36:43,279 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:36:43,338 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:36:43,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:43,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:43,391 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:43,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2018-09-30 10:36:43,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 10:36:43,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 10:36:43,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 10:36:43,392 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-30 10:36:43,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:43,571 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 10:36:43,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 10:36:43,572 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-30 10:36:43,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:43,573 INFO L225 Difference]: With dead ends: 101 [2018-09-30 10:36:43,573 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 10:36:43,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2018-09-30 10:36:43,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 10:36:43,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 10:36:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 10:36:43,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 10:36:43,577 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-30 10:36:43,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:43,577 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 10:36:43,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 10:36:43,577 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 10:36:43,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 10:36:43,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:43,578 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-30 10:36:43,578 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:43,578 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:43,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420486, now seen corresponding path program 95 times [2018-09-30 10:36:43,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:43,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:43,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:43,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:43,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:47,555 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:47,555 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:36:47,565 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:36:47,654 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-30 10:36:47,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:47,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:47,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:47,708 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:47,708 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 98 [2018-09-30 10:36:47,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 10:36:47,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 10:36:47,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2018-09-30 10:36:47,710 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 99 states. [2018-09-30 10:36:47,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:47,921 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-30 10:36:47,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 10:36:47,921 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 98 [2018-09-30 10:36:47,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:47,922 INFO L225 Difference]: With dead ends: 102 [2018-09-30 10:36:47,922 INFO L226 Difference]: Without dead ends: 100 [2018-09-30 10:36:47,923 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 [2018-09-30 10:36:47,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-30 10:36:47,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-30 10:36:47,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-30 10:36:47,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-30 10:36:47,926 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-30 10:36:47,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:47,926 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-30 10:36:47,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 10:36:47,926 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-30 10:36:47,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-30 10:36:47,927 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:47,927 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-30 10:36:47,927 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:47,927 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:47,927 INFO L82 PathProgramCache]: Analyzing trace with hash 15325536, now seen corresponding path program 96 times [2018-09-30 10:36:47,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:47,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:47,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:47,928 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:47,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:52,196 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:52,196 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 [2018-09-30 10:36:52,204 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:36:52,296 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 10:36:52,296 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:36:52,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:52,348 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:52,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 99 [2018-09-30 10:36:52,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 10:36:52,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 10:36:52,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 10:36:52,349 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-30 10:36:52,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:52,557 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 10:36:52,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 10:36:52,558 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-30 10:36:52,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:52,559 INFO L225 Difference]: With dead ends: 103 [2018-09-30 10:36:52,559 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 10:36:52,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2018-09-30 10:36:52,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 10:36:52,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 10:36:52,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 10:36:52,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-30 10:36:52,563 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-30 10:36:52,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:52,564 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-30 10:36:52,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 10:36:52,564 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-30 10:36:52,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 10:36:52,564 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:52,564 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-30 10:36:52,565 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:52,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:52,565 INFO L82 PathProgramCache]: Analyzing trace with hash 475087750, now seen corresponding path program 97 times [2018-09-30 10:36:52,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:52,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:52,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:52,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:36:52,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:56,801 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:36:56,801 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 [2018-09-30 10:36:56,808 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:36:56,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:36:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:36:56,913 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:36:56,913 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 100 [2018-09-30 10:36:56,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 10:36:56,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 10:36:56,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 10:36:56,915 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 101 states. [2018-09-30 10:36:57,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:36:57,160 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-30 10:36:57,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 10:36:57,160 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 100 [2018-09-30 10:36:57,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:36:57,161 INFO L225 Difference]: With dead ends: 104 [2018-09-30 10:36:57,161 INFO L226 Difference]: Without dead ends: 102 [2018-09-30 10:36:57,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2018-09-30 10:36:57,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-30 10:36:57,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-30 10:36:57,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-30 10:36:57,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-30 10:36:57,164 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-30 10:36:57,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:36:57,165 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-30 10:36:57,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 10:36:57,165 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-30 10:36:57,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-30 10:36:57,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:36:57,165 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-30 10:36:57,165 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:36:57,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:36:57,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814496, now seen corresponding path program 98 times [2018-09-30 10:36:57,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:36:57,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:36:57,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:57,166 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:36:57,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:36:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:01,369 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:01,369 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 [2018-09-30 10:37:01,375 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:37:01,429 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:37:01,429 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:01,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:01,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:01,487 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:01,487 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 101 [2018-09-30 10:37:01,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 10:37:01,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 10:37:01,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 10:37:01,488 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-30 10:37:01,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:01,798 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 10:37:01,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 10:37:01,799 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-30 10:37:01,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:01,800 INFO L225 Difference]: With dead ends: 105 [2018-09-30 10:37:01,800 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 10:37:01,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2018-09-30 10:37:01,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 10:37:01,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 10:37:01,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 10:37:01,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 10:37:01,804 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-30 10:37:01,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:01,804 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 10:37:01,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 10:37:01,804 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 10:37:01,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 10:37:01,805 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:01,805 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-30 10:37:01,805 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:01,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:01,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670662, now seen corresponding path program 99 times [2018-09-30 10:37:01,805 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:01,805 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:01,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:01,806 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:01,806 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:06,162 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:06,162 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 [2018-09-30 10:37:06,170 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:37:06,261 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-30 10:37:06,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:06,264 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:06,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:06,315 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 102 [2018-09-30 10:37:06,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 10:37:06,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 10:37:06,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-30 10:37:06,316 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 103 states. [2018-09-30 10:37:06,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:06,502 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-30 10:37:06,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 10:37:06,503 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 102 [2018-09-30 10:37:06,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:06,504 INFO L225 Difference]: With dead ends: 106 [2018-09-30 10:37:06,504 INFO L226 Difference]: Without dead ends: 104 [2018-09-30 10:37:06,505 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 [2018-09-30 10:37:06,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-30 10:37:06,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-30 10:37:06,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-30 10:37:06,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-30 10:37:06,508 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-30 10:37:06,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:06,508 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-30 10:37:06,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 10:37:06,508 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-30 10:37:06,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-30 10:37:06,509 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:06,509 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-30 10:37:06,509 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:06,509 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:06,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080992, now seen corresponding path program 100 times [2018-09-30 10:37:06,510 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:06,510 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:06,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:06,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:06,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:10,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:10,889 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:10,889 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 [2018-09-30 10:37:10,896 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:37:10,958 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:37:10,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:10,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:11,013 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:11,013 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 103 [2018-09-30 10:37:11,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 10:37:11,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 10:37:11,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 10:37:11,015 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-30 10:37:11,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:11,248 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 10:37:11,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 10:37:11,248 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-30 10:37:11,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:11,249 INFO L225 Difference]: With dead ends: 107 [2018-09-30 10:37:11,249 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 10:37:11,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2018-09-30 10:37:11,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 10:37:11,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 10:37:11,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 10:37:11,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-30 10:37:11,253 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-30 10:37:11,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:11,254 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-30 10:37:11,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 10:37:11,254 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-30 10:37:11,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 10:37:11,254 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:11,255 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-30 10:37:11,255 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:11,255 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:11,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1010833926, now seen corresponding path program 101 times [2018-09-30 10:37:11,255 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:11,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:11,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:11,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:11,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:15,772 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:15,772 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 [2018-09-30 10:37:15,780 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:37:15,885 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-30 10:37:15,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:15,889 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:15,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:15,943 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:15,943 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 104 [2018-09-30 10:37:15,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 10:37:15,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 10:37:15,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2018-09-30 10:37:15,944 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 105 states. [2018-09-30 10:37:16,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:16,245 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-30 10:37:16,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 10:37:16,245 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 104 [2018-09-30 10:37:16,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:16,247 INFO L225 Difference]: With dead ends: 108 [2018-09-30 10:37:16,247 INFO L226 Difference]: Without dead ends: 106 [2018-09-30 10:37:16,248 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 [2018-09-30 10:37:16,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-30 10:37:16,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-30 10:37:16,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-30 10:37:16,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-30 10:37:16,251 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-30 10:37:16,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:16,251 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-30 10:37:16,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 10:37:16,252 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-30 10:37:16,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-30 10:37:16,252 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:16,252 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-30 10:37:16,253 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:16,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:16,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1271076768, now seen corresponding path program 102 times [2018-09-30 10:37:16,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:16,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:16,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:16,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:16,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:20,926 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:20,926 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-30 10:37:20,933 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 10:37:21,029 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-30 10:37:21,029 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:21,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:21,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:21,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 105 [2018-09-30 10:37:21,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 10:37:21,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 10:37:21,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 10:37:21,113 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-09-30 10:37:21,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:21,373 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 10:37:21,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 10:37:21,374 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-09-30 10:37:21,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:21,375 INFO L225 Difference]: With dead ends: 109 [2018-09-30 10:37:21,375 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 10:37:21,375 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2018-09-30 10:37:21,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 10:37:21,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 10:37:21,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 10:37:21,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 10:37:21,380 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-30 10:37:21,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:21,380 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 10:37:21,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 10:37:21,380 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 10:37:21,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 10:37:21,380 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:21,380 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-30 10:37:21,381 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:21,381 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:21,381 INFO L82 PathProgramCache]: Analyzing trace with hash 748670278, now seen corresponding path program 103 times [2018-09-30 10:37:21,381 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:21,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:21,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:21,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:21,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:26,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:26,021 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:26,021 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 [2018-09-30 10:37:26,028 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:26,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:26,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:26,150 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:26,150 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 106 [2018-09-30 10:37:26,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 10:37:26,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 10:37:26,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 10:37:26,152 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 107 states. [2018-09-30 10:37:26,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:26,414 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-30 10:37:26,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 10:37:26,415 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 106 [2018-09-30 10:37:26,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:26,415 INFO L225 Difference]: With dead ends: 110 [2018-09-30 10:37:26,416 INFO L226 Difference]: Without dead ends: 108 [2018-09-30 10:37:26,416 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2018-09-30 10:37:26,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-30 10:37:26,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-30 10:37:26,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-30 10:37:26,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-30 10:37:26,419 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-30 10:37:26,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:26,419 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-30 10:37:26,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 10:37:26,419 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-30 10:37:26,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-30 10:37:26,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:26,420 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-30 10:37:26,420 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:26,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:26,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1733938272, now seen corresponding path program 104 times [2018-09-30 10:37:26,420 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:26,420 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:26,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:26,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 10:37:26,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:31,192 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:31,192 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 [2018-09-30 10:37:31,198 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 10:37:31,258 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 10:37:31,259 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:31,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:31,343 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:31,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 107 [2018-09-30 10:37:31,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 10:37:31,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 10:37:31,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 10:37:31,346 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-09-30 10:37:31,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:31,692 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 10:37:31,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 10:37:31,692 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-09-30 10:37:31,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:31,693 INFO L225 Difference]: With dead ends: 111 [2018-09-30 10:37:31,693 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 10:37:31,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2018-09-30 10:37:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 10:37:31,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 10:37:31,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 10:37:31,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-30 10:37:31,697 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-30 10:37:31,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:31,697 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-30 10:37:31,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 10:37:31,697 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-30 10:37:31,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 10:37:31,697 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:31,697 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-30 10:37:31,698 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:31,698 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:31,698 INFO L82 PathProgramCache]: Analyzing trace with hash -2082492282, now seen corresponding path program 105 times [2018-09-30 10:37:31,698 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:31,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:31,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:31,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:31,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:36,471 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:36,471 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 [2018-09-30 10:37:36,479 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 10:37:36,588 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-30 10:37:36,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:36,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:36,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:36,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 108 [2018-09-30 10:37:36,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 10:37:36,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 10:37:36,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2018-09-30 10:37:36,647 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 109 states. [2018-09-30 10:37:36,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:36,917 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-30 10:37:36,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 10:37:36,917 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 108 [2018-09-30 10:37:36,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:36,918 INFO L225 Difference]: With dead ends: 112 [2018-09-30 10:37:36,918 INFO L226 Difference]: Without dead ends: 110 [2018-09-30 10:37:36,919 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 [2018-09-30 10:37:36,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-30 10:37:36,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-30 10:37:36,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-30 10:37:36,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-30 10:37:36,922 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-30 10:37:36,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:36,922 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-30 10:37:36,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 10:37:36,922 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-30 10:37:36,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-30 10:37:36,922 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:36,923 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-30 10:37:36,923 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:36,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:36,923 INFO L82 PathProgramCache]: Analyzing trace with hash -132755168, now seen corresponding path program 106 times [2018-09-30 10:37:36,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:36,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:36,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:36,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:36,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:41,853 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:41,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:41,861 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 10:37:41,927 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 10:37:41,927 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:41,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:41,982 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:41,982 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 109 [2018-09-30 10:37:41,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 10:37:41,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 10:37:41,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 10:37:41,984 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-09-30 10:37:42,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 10:37:42,190 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 10:37:42,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 10:37:42,191 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-09-30 10:37:42,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 10:37:42,192 INFO L225 Difference]: With dead ends: 113 [2018-09-30 10:37:42,192 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 10:37:42,192 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2018-09-30 10:37:42,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 10:37:42,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 10:37:42,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 10:37:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 10:37:42,196 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-30 10:37:42,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 10:37:42,196 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 10:37:42,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 10:37:42,196 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 10:37:42,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 10:37:42,197 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 10:37:42,197 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-30 10:37:42,197 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 10:37:42,197 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 10:37:42,197 INFO L82 PathProgramCache]: Analyzing trace with hash 179553222, now seen corresponding path program 107 times [2018-09-30 10:37:42,197 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 10:37:42,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 10:37:42,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:42,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 10:37:42,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 10:37:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 10:37:47,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:47,046 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 10:37:47,046 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 10:37:47,054 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 10:37:47,165 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-30 10:37:47,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 10:37:47,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 10:37:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 10:37:47,220 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 10:37:47,220 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 110 [2018-09-30 10:37:47,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-30 10:37:47,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-30 10:37:47,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2018-09-30 10:37:47,222 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 111 states. Received shutdown request... [2018-09-30 10:37:47,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 10:37:47,345 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 10:37:47,350 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 10:37:47,351 INFO L202 PluginConnector]: Adding new model LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 10:37:47 BoogieIcfgContainer [2018-09-30 10:37:47,351 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 10:37:47,351 INFO L168 Benchmark]: Toolchain (without parser) took 238047.79 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -136.8 MB). Free memory was 1.5 GB in the beginning and 905.2 MB in the end (delta: 557.8 MB). Peak memory consumption was 421.0 MB. Max. memory is 7.1 GB. [2018-09-30 10:37:47,353 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:37:47,353 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.03 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:37:47,353 INFO L168 Benchmark]: Boogie Preprocessor took 20.92 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 10:37:47,353 INFO L168 Benchmark]: RCFGBuilder took 275.86 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 10:37:47,354 INFO L168 Benchmark]: TraceAbstraction took 237708.52 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -136.8 MB). Free memory was 1.4 GB in the beginning and 905.2 MB in the end (delta: 536.7 MB). Peak memory consumption was 399.9 MB. Max. memory is 7.1 GB. [2018-09-30 10:37:47,356 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 37.03 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.92 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 275.86 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 237708.52 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -136.8 MB). Free memory was 1.4 GB in the beginning and 905.2 MB in the end (delta: 536.7 MB). Peak memory consumption was 399.9 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 constructing difference of abstraction (111states) and FLOYD_HOARE automaton (currently 75 states, 111 states before enhancement), while ReachableStatesComputation was computing reachable states (73 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 237.6s OverallTime, 108 OverallIterations, 107 TraceHistogramMax, 20.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 324 SDtfs, 2 SDslu, 4042 SDs, 0 SdLazy, 10044 SolverSat, 163 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 15.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11986 GetRequests, 5993 SyntacticMatches, 0 SemanticMatches, 5993 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11342 ImplicationChecksByTransitivity, 200.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=107, 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, 107 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 5.8s SatisfiabilityAnalysisTime, 205.1s InterpolantComputationTime, 12201 NumberOfCodeBlocks, 12201 NumberOfCodeBlocksAsserted, 1718 NumberOfCheckSat, 11986 ConstructedInterpolants, 0 QuantifiedInterpolants, 4304404 SizeOfPredicates, 214 NumberOfNonLiveVariables, 24075 ConjunctsInSsa, 5992 ConjunctsInUnsatCore, 215 InterpolantComputations, 1 PerfectInterpolantSequences, 0/419868 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LuxembourgOctopus.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_10-37-47-364.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LuxembourgOctopus.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_10-37-47-364.csv Completed graceful shutdown