java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LuxembourgOctopus.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d19836b [2018-09-26 21:58:06,128 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-26 21:58:06,130 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-26 21:58:06,142 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-26 21:58:06,142 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-26 21:58:06,143 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-26 21:58:06,145 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-26 21:58:06,146 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-26 21:58:06,148 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-26 21:58:06,149 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-26 21:58:06,150 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-26 21:58:06,150 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-26 21:58:06,151 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-26 21:58:06,152 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-26 21:58:06,153 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-26 21:58:06,154 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-26 21:58:06,156 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-26 21:58:06,162 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-26 21:58:06,164 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-26 21:58:06,169 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-26 21:58:06,170 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-26 21:58:06,174 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-26 21:58:06,180 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-26 21:58:06,180 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-26 21:58:06,180 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-26 21:58:06,181 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-26 21:58:06,184 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-26 21:58:06,185 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-26 21:58:06,185 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-26 21:58:06,188 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-26 21:58:06,188 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-26 21:58:06,188 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-26 21:58:06,189 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-26 21:58:06,189 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-26 21:58:06,193 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-26 21:58:06,194 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-26 21:58:06,194 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-26 21:58:06,221 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-26 21:58:06,222 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-26 21:58:06,223 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-26 21:58:06,223 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-26 21:58:06,223 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-26 21:58:06,224 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-26 21:58:06,224 INFO L133 SettingsManager]: * Use SBE=true [2018-09-26 21:58:06,224 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-26 21:58:06,224 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-26 21:58:06,225 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-26 21:58:06,225 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-26 21:58:06,225 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-26 21:58:06,225 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-26 21:58:06,225 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-26 21:58:06,225 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-26 21:58:06,226 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-26 21:58:06,226 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-26 21:58:06,226 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-26 21:58:06,226 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-26 21:58:06,227 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-26 21:58:06,227 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-26 21:58:06,227 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-26 21:58:06,227 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-26 21:58:06,227 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-26 21:58:06,227 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-26 21:58:06,228 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-26 21:58:06,228 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-26 21:58:06,228 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-26 21:58:06,228 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-26 21:58:06,228 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-26 21:58:06,229 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-26 21:58:06,273 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-26 21:58:06,286 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-26 21:58:06,291 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-26 21:58:06,292 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-26 21:58:06,293 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-26 21:58:06,294 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LuxembourgOctopus.bpl [2018-09-26 21:58:06,294 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/LuxembourgOctopus.bpl' [2018-09-26 21:58:06,349 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-26 21:58:06,353 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-26 21:58:06,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-26 21:58:06,357 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-26 21:58:06,357 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-26 21:58:06,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:58:06" (1/1) ... [2018-09-26 21:58:06,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:58:06" (1/1) ... [2018-09-26 21:58:06,396 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-26 21:58:06,396 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-26 21:58:06,397 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-26 21:58:06,399 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-26 21:58:06,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-26 21:58:06,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-26 21:58:06,400 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-26 21:58:06,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:58:06" (1/1) ... [2018-09-26 21:58:06,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:58:06" (1/1) ... [2018-09-26 21:58:06,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:58:06" (1/1) ... [2018-09-26 21:58:06,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:58:06" (1/1) ... [2018-09-26 21:58:06,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:58:06" (1/1) ... [2018-09-26 21:58:06,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:58:06" (1/1) ... [2018-09-26 21:58:06,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:58:06" (1/1) ... [2018-09-26 21:58:06,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-26 21:58:06,423 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-26 21:58:06,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-26 21:58:06,423 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-26 21:58:06,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:58:06" (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 [2018-09-26 21:58:06,490 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-09-26 21:58:06,491 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-09-26 21:58:06,491 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-09-26 21:58:06,721 INFO L343 CfgBuilder]: Using library mode [2018-09-26 21:58:06,722 INFO L202 PluginConnector]: Adding new model LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:58:06 BoogieIcfgContainer [2018-09-26 21:58:06,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-26 21:58:06,723 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-26 21:58:06,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-26 21:58:06,727 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-26 21:58:06,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 26.09 09:58:06" (1/2) ... [2018-09-26 21:58:06,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fedb2d and model type LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.09 09:58:06, skipping insertion in model container [2018-09-26 21:58:06,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.09 09:58:06" (2/2) ... [2018-09-26 21:58:06,732 INFO L112 eAbstractionObserver]: Analyzing ICFG LuxembourgOctopus.bpl [2018-09-26 21:58:06,745 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-26 21:58:06,756 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-26 21:58:06,813 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-26 21:58:06,814 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-26 21:58:06,814 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-26 21:58:06,814 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-26 21:58:06,815 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-26 21:58:06,815 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-26 21:58:06,815 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-26 21:58:06,815 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-26 21:58:06,815 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-26 21:58:06,830 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-09-26 21:58:06,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-26 21:58:06,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:06,837 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-26 21:58:06,838 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:06,846 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:06,846 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-09-26 21:58:06,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:06,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:06,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:06,896 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:06,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:06,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:06,987 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-26 21:58:06,987 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-26 21:58:06,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-26 21:58:07,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-26 21:58:07,005 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:07,007 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-09-26 21:58:07,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:07,263 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-09-26 21:58:07,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-26 21:58:07,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-26 21:58:07,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:07,278 INFO L225 Difference]: With dead ends: 13 [2018-09-26 21:58:07,278 INFO L226 Difference]: Without dead ends: 5 [2018-09-26 21:58:07,281 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:07,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-09-26 21:58:07,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-09-26 21:58:07,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-09-26 21:58:07,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-09-26 21:58:07,325 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-09-26 21:58:07,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:07,325 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-09-26 21:58:07,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-26 21:58:07,325 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-09-26 21:58:07,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-26 21:58:07,326 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:07,326 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-26 21:58:07,326 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:07,326 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:07,326 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-09-26 21:58:07,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:07,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:07,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:07,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:07,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:07,429 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:07,429 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 [2018-09-26 21:58:07,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:07,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:07,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:07,631 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:07,631 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2018-09-26 21:58:07,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-26 21:58:07,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-26 21:58:07,633 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:07,633 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 5 states. [2018-09-26 21:58:07,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:07,799 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-09-26 21:58:07,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-26 21:58:07,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-09-26 21:58:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:07,801 INFO L225 Difference]: With dead ends: 8 [2018-09-26 21:58:07,801 INFO L226 Difference]: Without dead ends: 6 [2018-09-26 21:58:07,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:07,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-09-26 21:58:07,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-09-26 21:58:07,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-26 21:58:07,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-09-26 21:58:07,805 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-09-26 21:58:07,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:07,805 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-09-26 21:58:07,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-26 21:58:07,806 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-09-26 21:58:07,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-26 21:58:07,806 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:07,806 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-09-26 21:58:07,807 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:07,807 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:07,807 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-09-26 21:58:07,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:07,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:07,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:07,809 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:07,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:07,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:07,915 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:07,915 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 [2018-09-26 21:58:07,930 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:07,944 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:07,945 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:07,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:08,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:08,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:08,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-09-26 21:58:08,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-26 21:58:08,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-26 21:58:08,043 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:08,044 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 6 states. [2018-09-26 21:58:08,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:08,255 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-09-26 21:58:08,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-26 21:58:08,256 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2018-09-26 21:58:08,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:08,257 INFO L225 Difference]: With dead ends: 9 [2018-09-26 21:58:08,257 INFO L226 Difference]: Without dead ends: 7 [2018-09-26 21:58:08,257 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:08,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-26 21:58:08,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-26 21:58:08,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-26 21:58:08,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-26 21:58:08,260 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-09-26 21:58:08,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:08,261 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-26 21:58:08,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-26 21:58:08,261 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-26 21:58:08,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-26 21:58:08,262 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:08,262 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-09-26 21:58:08,265 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:08,265 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:08,265 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-09-26 21:58:08,266 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:08,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:08,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:08,267 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:08,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:08,457 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:08,457 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 [2018-09-26 21:58:08,469 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:08,479 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-26 21:58:08,479 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:08,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:08,540 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:08,540 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-09-26 21:58:08,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-26 21:58:08,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-26 21:58:08,541 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:08,541 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 7 states. [2018-09-26 21:58:08,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:08,621 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-09-26 21:58:08,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-26 21:58:08,621 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 6 [2018-09-26 21:58:08,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:08,622 INFO L225 Difference]: With dead ends: 10 [2018-09-26 21:58:08,623 INFO L226 Difference]: Without dead ends: 8 [2018-09-26 21:58:08,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:08,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-26 21:58:08,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-26 21:58:08,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-26 21:58:08,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-09-26 21:58:08,626 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-09-26 21:58:08,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:08,627 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-09-26 21:58:08,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-26 21:58:08,627 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-09-26 21:58:08,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-26 21:58:08,627 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:08,627 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-09-26 21:58:08,628 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:08,628 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:08,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-09-26 21:58:08,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:08,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:08,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:08,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:08,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:08,712 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:08,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:08,727 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:08,761 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:08,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:08,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:08,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:08,898 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:08,898 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-09-26 21:58:08,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-26 21:58:08,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-26 21:58:08,899 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:08,899 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 8 states. [2018-09-26 21:58:08,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:08,992 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-26 21:58:08,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-26 21:58:08,993 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 7 [2018-09-26 21:58:08,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:08,994 INFO L225 Difference]: With dead ends: 11 [2018-09-26 21:58:08,994 INFO L226 Difference]: Without dead ends: 9 [2018-09-26 21:58:08,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:08,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-26 21:58:08,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-26 21:58:08,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-26 21:58:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-26 21:58:08,998 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-09-26 21:58:08,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:08,998 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-26 21:58:08,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-26 21:58:08,998 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-26 21:58:08,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-26 21:58:08,999 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:08,999 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-09-26 21:58:08,999 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:08,999 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:09,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-09-26 21:58:09,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:09,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:09,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:09,001 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:09,001 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:09,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:09,128 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 [2018-09-26 21:58:09,137 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:09,151 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-26 21:58:09,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:09,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:09,252 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:09,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-09-26 21:58:09,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-26 21:58:09,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-26 21:58:09,253 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:09,253 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 9 states. [2018-09-26 21:58:09,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:09,739 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-09-26 21:58:09,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-26 21:58:09,741 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 8 [2018-09-26 21:58:09,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:09,742 INFO L225 Difference]: With dead ends: 12 [2018-09-26 21:58:09,742 INFO L226 Difference]: Without dead ends: 10 [2018-09-26 21:58:09,743 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:09,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-09-26 21:58:09,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-09-26 21:58:09,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-09-26 21:58:09,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-09-26 21:58:09,746 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-09-26 21:58:09,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:09,746 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-09-26 21:58:09,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-26 21:58:09,747 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-09-26 21:58:09,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-26 21:58:09,747 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:09,747 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-09-26 21:58:09,748 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:09,748 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:09,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-09-26 21:58:09,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:09,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:09,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:09,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:09,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:09,923 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:09,923 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 [2018-09-26 21:58:09,934 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:09,964 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-09-26 21:58:09,964 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:09,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:10,015 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:10,037 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:10,037 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-09-26 21:58:10,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-26 21:58:10,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-26 21:58:10,038 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:10,039 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 10 states. [2018-09-26 21:58:10,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:10,182 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-26 21:58:10,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-26 21:58:10,182 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2018-09-26 21:58:10,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:10,183 INFO L225 Difference]: With dead ends: 13 [2018-09-26 21:58:10,183 INFO L226 Difference]: Without dead ends: 11 [2018-09-26 21:58:10,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:10,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-26 21:58:10,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-26 21:58:10,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-26 21:58:10,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-26 21:58:10,186 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-09-26 21:58:10,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:10,186 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-26 21:58:10,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-26 21:58:10,187 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-26 21:58:10,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-26 21:58:10,187 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:10,187 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-09-26 21:58:10,188 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:10,188 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:10,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-09-26 21:58:10,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:10,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:10,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:10,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:10,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:10,323 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:10,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:10,324 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:10,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:10,341 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:10,435 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:10,436 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-09-26 21:58:10,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-26 21:58:10,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-26 21:58:10,436 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:10,437 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 11 states. [2018-09-26 21:58:10,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:10,514 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-09-26 21:58:10,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-26 21:58:10,518 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2018-09-26 21:58:10,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:10,518 INFO L225 Difference]: With dead ends: 14 [2018-09-26 21:58:10,518 INFO L226 Difference]: Without dead ends: 12 [2018-09-26 21:58:10,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:10,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-09-26 21:58:10,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-09-26 21:58:10,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-09-26 21:58:10,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-09-26 21:58:10,523 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-09-26 21:58:10,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:10,523 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-09-26 21:58:10,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-26 21:58:10,523 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-09-26 21:58:10,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-09-26 21:58:10,524 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:10,524 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-09-26 21:58:10,524 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:10,524 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:10,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-09-26 21:58:10,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:10,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:10,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:10,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:10,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:10,684 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:10,685 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 [2018-09-26 21:58:10,702 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:10,738 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:10,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:10,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:11,143 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:11,143 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-09-26 21:58:11,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-26 21:58:11,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-26 21:58:11,144 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:11,144 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-09-26 21:58:11,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:11,277 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-26 21:58:11,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-26 21:58:11,278 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2018-09-26 21:58:11,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:11,279 INFO L225 Difference]: With dead ends: 15 [2018-09-26 21:58:11,279 INFO L226 Difference]: Without dead ends: 13 [2018-09-26 21:58:11,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:11,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-26 21:58:11,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-26 21:58:11,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-26 21:58:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-26 21:58:11,282 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-09-26 21:58:11,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:11,282 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-26 21:58:11,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-26 21:58:11,282 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-26 21:58:11,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-26 21:58:11,283 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:11,283 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-09-26 21:58:11,283 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:11,283 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:11,284 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-09-26 21:58:11,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:11,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:11,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:11,285 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:11,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:11,524 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:11,525 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:11,525 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 [2018-09-26 21:58:11,533 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:11,544 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-26 21:58:11,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:11,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:11,651 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:11,684 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:11,684 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-09-26 21:58:11,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-26 21:58:11,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-26 21:58:11,685 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:11,685 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 13 states. [2018-09-26 21:58:11,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:11,874 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-09-26 21:58:11,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-26 21:58:11,875 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2018-09-26 21:58:11,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:11,875 INFO L225 Difference]: With dead ends: 16 [2018-09-26 21:58:11,876 INFO L226 Difference]: Without dead ends: 14 [2018-09-26 21:58:11,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:11,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-09-26 21:58:11,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-09-26 21:58:11,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-26 21:58:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-09-26 21:58:11,880 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-09-26 21:58:11,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:11,881 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-09-26 21:58:11,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-26 21:58:11,881 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-09-26 21:58:11,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-26 21:58:11,882 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:11,882 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-09-26 21:58:11,882 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:11,882 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:11,883 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-09-26 21:58:11,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:11,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:11,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:11,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:11,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:12,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:12,051 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:12,059 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:12,073 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:12,074 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:12,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:12,259 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:12,280 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:12,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-09-26 21:58:12,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-26 21:58:12,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-26 21:58:12,281 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:12,281 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2018-09-26 21:58:12,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:12,371 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-26 21:58:12,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-26 21:58:12,372 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-26 21:58:12,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:12,373 INFO L225 Difference]: With dead ends: 17 [2018-09-26 21:58:12,373 INFO L226 Difference]: Without dead ends: 15 [2018-09-26 21:58:12,373 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:12,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-26 21:58:12,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-26 21:58:12,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-26 21:58:12,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-26 21:58:12,377 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-09-26 21:58:12,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:12,377 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-26 21:58:12,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-26 21:58:12,377 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-26 21:58:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-26 21:58:12,378 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:12,378 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-09-26 21:58:12,378 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:12,378 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:12,379 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-09-26 21:58:12,379 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:12,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:12,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:12,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:12,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:12,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:12,506 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:12,506 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 [2018-09-26 21:58:12,524 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:12,545 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-09-26 21:58:12,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:12,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:12,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:12,707 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-09-26 21:58:12,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-26 21:58:12,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-26 21:58:12,707 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:12,708 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 15 states. [2018-09-26 21:58:12,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:12,835 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-09-26 21:58:12,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-26 21:58:12,836 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 14 [2018-09-26 21:58:12,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:12,836 INFO L225 Difference]: With dead ends: 18 [2018-09-26 21:58:12,836 INFO L226 Difference]: Without dead ends: 16 [2018-09-26 21:58:12,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:12,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-26 21:58:12,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-26 21:58:12,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-26 21:58:12,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-09-26 21:58:12,840 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-09-26 21:58:12,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:12,840 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-09-26 21:58:12,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-26 21:58:12,840 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-09-26 21:58:12,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-26 21:58:12,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:12,841 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-09-26 21:58:12,841 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:12,842 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:12,842 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-09-26 21:58:12,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:12,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:12,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:12,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:12,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:13,130 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:13,130 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:13,141 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:13,156 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-26 21:58:13,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:13,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:13,244 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:13,266 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:13,267 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-09-26 21:58:13,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-26 21:58:13,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-26 21:58:13,267 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:13,268 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 16 states. [2018-09-26 21:58:13,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:13,400 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-26 21:58:13,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-26 21:58:13,401 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 15 [2018-09-26 21:58:13,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:13,402 INFO L225 Difference]: With dead ends: 19 [2018-09-26 21:58:13,402 INFO L226 Difference]: Without dead ends: 17 [2018-09-26 21:58:13,403 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:13,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-26 21:58:13,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-26 21:58:13,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-26 21:58:13,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-26 21:58:13,407 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-09-26 21:58:13,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:13,407 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-26 21:58:13,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-26 21:58:13,407 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-26 21:58:13,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-26 21:58:13,408 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:13,408 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-09-26 21:58:13,408 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:13,408 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:13,409 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-09-26 21:58:13,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:13,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:13,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:13,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:13,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:13,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:13,630 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:13,631 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:13,640 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:13,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:14,016 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:14,017 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2018-09-26 21:58:14,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-26 21:58:14,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-26 21:58:14,018 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:14,018 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2018-09-26 21:58:15,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:15,436 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-09-26 21:58:15,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-26 21:58:15,439 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2018-09-26 21:58:15,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:15,439 INFO L225 Difference]: With dead ends: 20 [2018-09-26 21:58:15,440 INFO L226 Difference]: Without dead ends: 18 [2018-09-26 21:58:15,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:15,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-26 21:58:15,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-09-26 21:58:15,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-09-26 21:58:15,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-09-26 21:58:15,443 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-09-26 21:58:15,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:15,444 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-09-26 21:58:15,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-26 21:58:15,444 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-09-26 21:58:15,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-09-26 21:58:15,444 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:15,444 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-09-26 21:58:15,444 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:15,445 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:15,445 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-09-26 21:58:15,445 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:15,445 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:15,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:15,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:15,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:15,616 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:15,616 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 [2018-09-26 21:58:15,625 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:15,643 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:15,643 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:15,645 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:15,774 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:15,774 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2018-09-26 21:58:15,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-26 21:58:15,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-26 21:58:15,775 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:15,775 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 18 states. [2018-09-26 21:58:15,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:15,895 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-26 21:58:15,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-26 21:58:15,898 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 17 [2018-09-26 21:58:15,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:15,898 INFO L225 Difference]: With dead ends: 21 [2018-09-26 21:58:15,898 INFO L226 Difference]: Without dead ends: 19 [2018-09-26 21:58:15,899 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:15,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-26 21:58:15,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-26 21:58:15,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-26 21:58:15,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-26 21:58:15,908 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-09-26 21:58:15,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:15,908 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-26 21:58:15,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-26 21:58:15,908 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-26 21:58:15,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-26 21:58:15,909 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:15,909 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-09-26 21:58:15,909 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:15,910 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:15,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-09-26 21:58:15,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:15,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:15,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:15,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:15,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:16,085 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:16,085 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:16,092 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:16,220 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-09-26 21:58:16,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:16,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:16,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:16,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2018-09-26 21:58:16,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-26 21:58:16,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-26 21:58:16,579 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:16,579 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 19 states. [2018-09-26 21:58:16,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:16,741 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-09-26 21:58:16,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-26 21:58:16,742 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18 [2018-09-26 21:58:16,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:16,743 INFO L225 Difference]: With dead ends: 22 [2018-09-26 21:58:16,743 INFO L226 Difference]: Without dead ends: 20 [2018-09-26 21:58:16,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:16,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-09-26 21:58:16,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-09-26 21:58:16,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-09-26 21:58:16,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-09-26 21:58:16,748 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-09-26 21:58:16,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:16,748 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-09-26 21:58:16,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-26 21:58:16,748 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-09-26 21:58:16,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-09-26 21:58:16,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:16,749 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-09-26 21:58:16,749 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:16,749 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:16,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-09-26 21:58:16,749 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:16,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:16,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:16,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:16,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:16,932 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:16,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:16,941 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:16,955 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:16,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:16,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:17,187 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:17,187 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2018-09-26 21:58:17,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-26 21:58:17,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-26 21:58:17,188 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:17,188 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2018-09-26 21:58:17,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:17,312 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-26 21:58:17,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-26 21:58:17,312 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2018-09-26 21:58:17,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:17,313 INFO L225 Difference]: With dead ends: 23 [2018-09-26 21:58:17,313 INFO L226 Difference]: Without dead ends: 21 [2018-09-26 21:58:17,314 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:17,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-26 21:58:17,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-26 21:58:17,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-26 21:58:17,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-26 21:58:17,318 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-09-26 21:58:17,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:17,318 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-26 21:58:17,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-26 21:58:17,319 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-26 21:58:17,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-26 21:58:17,319 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:17,319 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-09-26 21:58:17,319 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:17,320 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:17,320 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-09-26 21:58:17,320 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:17,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:17,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:17,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:17,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:17,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:17,589 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 [2018-09-26 21:58:17,596 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:17,613 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-09-26 21:58:17,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:17,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:17,756 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:17,757 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2018-09-26 21:58:17,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-26 21:58:17,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-26 21:58:17,757 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:17,758 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-09-26 21:58:17,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:17,855 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-09-26 21:58:17,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-26 21:58:17,855 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 20 [2018-09-26 21:58:17,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:17,856 INFO L225 Difference]: With dead ends: 24 [2018-09-26 21:58:17,856 INFO L226 Difference]: Without dead ends: 22 [2018-09-26 21:58:17,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:17,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-09-26 21:58:17,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-09-26 21:58:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-09-26 21:58:17,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-09-26 21:58:17,861 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-09-26 21:58:17,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:17,861 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-09-26 21:58:17,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-26 21:58:17,861 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-09-26 21:58:17,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-26 21:58:17,862 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:17,862 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-09-26 21:58:17,862 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:17,862 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:17,863 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-09-26 21:58:17,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:17,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:17,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:17,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:17,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:18,316 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:18,316 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 [2018-09-26 21:58:18,328 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:18,345 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-09-26 21:58:18,345 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:18,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:18,779 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:18,780 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2018-09-26 21:58:18,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-26 21:58:18,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-26 21:58:18,781 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:18,781 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 22 states. [2018-09-26 21:58:18,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:18,942 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-26 21:58:18,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-26 21:58:18,943 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2018-09-26 21:58:18,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:18,944 INFO L225 Difference]: With dead ends: 25 [2018-09-26 21:58:18,944 INFO L226 Difference]: Without dead ends: 23 [2018-09-26 21:58:18,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:18,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-26 21:58:18,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-26 21:58:18,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-26 21:58:18,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-26 21:58:18,949 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-09-26 21:58:18,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:18,950 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-26 21:58:18,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-26 21:58:18,950 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-26 21:58:18,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-26 21:58:18,951 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:18,951 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-09-26 21:58:18,951 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:18,951 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:18,951 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-09-26 21:58:18,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:18,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:18,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:18,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:18,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:19,092 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:19,093 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:19,093 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 [2018-09-26 21:58:19,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:19,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:19,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:19,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:19,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2018-09-26 21:58:19,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-26 21:58:19,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-26 21:58:19,302 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:19,302 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 23 states. [2018-09-26 21:58:19,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:19,595 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-09-26 21:58:19,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-26 21:58:19,596 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2018-09-26 21:58:19,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:19,597 INFO L225 Difference]: With dead ends: 26 [2018-09-26 21:58:19,597 INFO L226 Difference]: Without dead ends: 24 [2018-09-26 21:58:19,597 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:19,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-09-26 21:58:19,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-09-26 21:58:19,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-09-26 21:58:19,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-09-26 21:58:19,600 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-09-26 21:58:19,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:19,600 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-09-26 21:58:19,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-26 21:58:19,601 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-09-26 21:58:19,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-26 21:58:19,601 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:19,601 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-09-26 21:58:19,602 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:19,602 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:19,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-09-26 21:58:19,602 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:19,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:19,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:19,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:19,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:19,945 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:19,945 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:19,954 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:19,967 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:19,967 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:19,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:20,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:20,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2018-09-26 21:58:20,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-26 21:58:20,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-26 21:58:20,157 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:20,157 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 24 states. [2018-09-26 21:58:20,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:20,398 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-26 21:58:20,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-26 21:58:20,399 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 23 [2018-09-26 21:58:20,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:20,399 INFO L225 Difference]: With dead ends: 27 [2018-09-26 21:58:20,400 INFO L226 Difference]: Without dead ends: 25 [2018-09-26 21:58:20,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:20,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-26 21:58:20,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-26 21:58:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-26 21:58:20,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-26 21:58:20,404 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-09-26 21:58:20,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:20,404 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-26 21:58:20,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-26 21:58:20,405 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-26 21:58:20,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-26 21:58:20,405 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:20,405 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-09-26 21:58:20,406 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:20,406 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:20,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-09-26 21:58:20,406 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:20,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:20,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:20,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:20,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:20,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:20,618 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:20,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:20,619 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 [2018-09-26 21:58:20,627 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:20,646 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-26 21:58:20,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:20,649 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:20,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:20,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2018-09-26 21:58:20,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-26 21:58:20,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-26 21:58:20,937 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:20,937 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 25 states. [2018-09-26 21:58:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:21,218 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-09-26 21:58:21,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-26 21:58:21,221 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 24 [2018-09-26 21:58:21,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:21,221 INFO L225 Difference]: With dead ends: 28 [2018-09-26 21:58:21,221 INFO L226 Difference]: Without dead ends: 26 [2018-09-26 21:58:21,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:21,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-09-26 21:58:21,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-09-26 21:58:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-09-26 21:58:21,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-09-26 21:58:21,226 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-09-26 21:58:21,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:21,226 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-09-26 21:58:21,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-26 21:58:21,226 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-09-26 21:58:21,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-09-26 21:58:21,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:21,226 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-09-26 21:58:21,227 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:21,227 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:21,227 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-09-26 21:58:21,227 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:21,227 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:21,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:21,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:21,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:21,918 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:21,918 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 [2018-09-26 21:58:21,926 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:21,941 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:21,941 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:21,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:22,052 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:22,052 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2018-09-26 21:58:22,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-26 21:58:22,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-26 21:58:22,053 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:22,053 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 26 states. [2018-09-26 21:58:22,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:22,295 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-26 21:58:22,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-26 21:58:22,295 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 25 [2018-09-26 21:58:22,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:22,296 INFO L225 Difference]: With dead ends: 29 [2018-09-26 21:58:22,296 INFO L226 Difference]: Without dead ends: 27 [2018-09-26 21:58:22,296 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:22,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-26 21:58:22,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-26 21:58:22,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-26 21:58:22,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-26 21:58:22,300 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-09-26 21:58:22,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:22,300 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-26 21:58:22,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-26 21:58:22,300 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-26 21:58:22,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-26 21:58:22,301 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:22,301 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-09-26 21:58:22,301 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:22,301 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:22,301 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-09-26 21:58:22,301 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:22,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:22,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:22,302 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:22,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:22,526 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:22,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:22,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:22,535 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:22,555 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-09-26 21:58:22,555 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:22,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:22,635 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:22,655 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:22,656 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2018-09-26 21:58:22,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-26 21:58:22,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-26 21:58:22,656 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:22,656 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 27 states. [2018-09-26 21:58:22,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:22,826 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-09-26 21:58:22,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-26 21:58:22,827 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 26 [2018-09-26 21:58:22,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:22,828 INFO L225 Difference]: With dead ends: 30 [2018-09-26 21:58:22,828 INFO L226 Difference]: Without dead ends: 28 [2018-09-26 21:58:22,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:22,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-09-26 21:58:22,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-09-26 21:58:22,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-09-26 21:58:22,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-09-26 21:58:22,832 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-09-26 21:58:22,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:22,832 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-09-26 21:58:22,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-26 21:58:22,832 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-09-26 21:58:22,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-09-26 21:58:22,833 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:22,833 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-09-26 21:58:22,833 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:22,833 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:22,834 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-09-26 21:58:22,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:22,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:22,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:22,835 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:22,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:23,172 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:23,172 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:23,179 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:23,200 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-26 21:58:23,201 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:23,202 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:23,310 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:23,330 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:23,331 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2018-09-26 21:58:23,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-26 21:58:23,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-26 21:58:23,331 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:23,331 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 28 states. [2018-09-26 21:58:23,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:23,479 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-26 21:58:23,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-26 21:58:23,479 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2018-09-26 21:58:23,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:23,480 INFO L225 Difference]: With dead ends: 31 [2018-09-26 21:58:23,480 INFO L226 Difference]: Without dead ends: 29 [2018-09-26 21:58:23,481 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:23,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-26 21:58:23,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-26 21:58:23,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-26 21:58:23,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-26 21:58:23,486 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-09-26 21:58:23,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:23,488 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-26 21:58:23,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-26 21:58:23,488 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-26 21:58:23,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-26 21:58:23,489 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:23,489 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-09-26 21:58:23,493 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:23,493 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:23,493 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-09-26 21:58:23,493 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:23,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:23,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:23,494 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:23,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:23,745 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:23,746 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 [2018-09-26 21:58:23,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:23,769 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:23,909 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:23,909 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2018-09-26 21:58:23,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-26 21:58:23,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-26 21:58:23,910 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:23,910 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 29 states. [2018-09-26 21:58:24,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:24,121 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-09-26 21:58:24,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-26 21:58:24,123 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 28 [2018-09-26 21:58:24,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:24,123 INFO L225 Difference]: With dead ends: 32 [2018-09-26 21:58:24,123 INFO L226 Difference]: Without dead ends: 30 [2018-09-26 21:58:24,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:24,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-09-26 21:58:24,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-09-26 21:58:24,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-26 21:58:24,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-09-26 21:58:24,126 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-09-26 21:58:24,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:24,127 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-09-26 21:58:24,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-26 21:58:24,127 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-09-26 21:58:24,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-26 21:58:24,128 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:24,128 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-09-26 21:58:24,128 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:24,128 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:24,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-09-26 21:58:24,128 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:24,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:24,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:24,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:24,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:24,289 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:24,289 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:24,297 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:24,316 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:24,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:24,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:24,417 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:24,437 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:24,438 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2018-09-26 21:58:24,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-26 21:58:24,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-26 21:58:24,439 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:24,439 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 30 states. [2018-09-26 21:58:24,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:24,635 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-26 21:58:24,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-26 21:58:24,635 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 29 [2018-09-26 21:58:24,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:24,636 INFO L225 Difference]: With dead ends: 33 [2018-09-26 21:58:24,636 INFO L226 Difference]: Without dead ends: 31 [2018-09-26 21:58:24,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:24,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-26 21:58:24,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-26 21:58:24,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-26 21:58:24,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-26 21:58:24,640 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-09-26 21:58:24,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:24,640 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-26 21:58:24,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-26 21:58:24,640 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-26 21:58:24,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-26 21:58:24,641 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:24,641 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-09-26 21:58:24,641 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:24,642 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:24,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-09-26 21:58:24,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:24,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:24,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:24,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:24,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:24,869 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:24,869 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 [2018-09-26 21:58:24,877 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:24,902 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-09-26 21:58:24,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:24,904 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:25,012 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:25,012 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2018-09-26 21:58:25,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-26 21:58:25,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-26 21:58:25,013 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:25,013 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 31 states. [2018-09-26 21:58:25,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:25,161 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-09-26 21:58:25,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-26 21:58:25,161 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 30 [2018-09-26 21:58:25,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:25,162 INFO L225 Difference]: With dead ends: 34 [2018-09-26 21:58:25,162 INFO L226 Difference]: Without dead ends: 32 [2018-09-26 21:58:25,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:25,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-09-26 21:58:25,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-09-26 21:58:25,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-09-26 21:58:25,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-09-26 21:58:25,167 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-09-26 21:58:25,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:25,167 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-09-26 21:58:25,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-26 21:58:25,168 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-09-26 21:58:25,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-26 21:58:25,168 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:25,168 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-09-26 21:58:25,168 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:25,169 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:25,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-09-26 21:58:25,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:25,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:25,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:25,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:25,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:25,642 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:25,642 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 [2018-09-26 21:58:25,654 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:25,672 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:25,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:25,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:25,882 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:25,882 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2018-09-26 21:58:25,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-26 21:58:25,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-26 21:58:25,883 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:25,883 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2018-09-26 21:58:26,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:26,082 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-26 21:58:26,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-26 21:58:26,083 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2018-09-26 21:58:26,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:26,083 INFO L225 Difference]: With dead ends: 35 [2018-09-26 21:58:26,083 INFO L226 Difference]: Without dead ends: 33 [2018-09-26 21:58:26,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:26,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-26 21:58:26,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-26 21:58:26,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-26 21:58:26,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-26 21:58:26,088 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-09-26 21:58:26,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:26,089 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-26 21:58:26,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-26 21:58:26,089 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-26 21:58:26,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-26 21:58:26,091 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:26,091 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-09-26 21:58:26,091 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:26,091 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:26,091 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-09-26 21:58:26,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:26,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:26,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:26,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:26,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:26,368 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:26,368 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 [2018-09-26 21:58:26,375 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:26,399 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-09-26 21:58:26,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:26,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:26,511 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:26,511 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2018-09-26 21:58:26,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-26 21:58:26,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-26 21:58:26,512 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:26,512 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 33 states. [2018-09-26 21:58:26,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:26,777 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-09-26 21:58:26,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-26 21:58:26,778 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 32 [2018-09-26 21:58:26,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:26,778 INFO L225 Difference]: With dead ends: 36 [2018-09-26 21:58:26,779 INFO L226 Difference]: Without dead ends: 34 [2018-09-26 21:58:26,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:26,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-09-26 21:58:26,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-09-26 21:58:26,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-09-26 21:58:26,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-09-26 21:58:26,783 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-09-26 21:58:26,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:26,783 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-09-26 21:58:26,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-26 21:58:26,783 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-09-26 21:58:26,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-09-26 21:58:26,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:26,783 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-09-26 21:58:26,784 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:26,784 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:26,784 INFO L82 PathProgramCache]: Analyzing trace with hash -410989408, now seen corresponding path program 30 times [2018-09-26 21:58:26,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:26,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:26,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:26,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:26,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:27,032 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:27,032 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 [2018-09-26 21:58:27,045 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:27,069 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-26 21:58:27,069 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:27,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:27,181 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:27,181 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2018-09-26 21:58:27,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-26 21:58:27,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-26 21:58:27,182 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:27,182 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 34 states. [2018-09-26 21:58:27,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:27,380 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-26 21:58:27,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-26 21:58:27,380 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2018-09-26 21:58:27,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:27,381 INFO L225 Difference]: With dead ends: 37 [2018-09-26 21:58:27,381 INFO L226 Difference]: Without dead ends: 35 [2018-09-26 21:58:27,381 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:27,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-26 21:58:27,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-26 21:58:27,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-26 21:58:27,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-26 21:58:27,385 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-09-26 21:58:27,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:27,385 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-26 21:58:27,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-26 21:58:27,386 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-26 21:58:27,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-26 21:58:27,386 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:27,386 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-09-26 21:58:27,386 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:27,386 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:27,387 INFO L82 PathProgramCache]: Analyzing trace with hash 144226374, now seen corresponding path program 31 times [2018-09-26 21:58:27,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:27,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:27,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:27,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:27,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:27,674 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:27,674 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:27,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:27,701 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:27,813 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:27,813 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2018-09-26 21:58:27,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-26 21:58:27,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-26 21:58:27,814 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:27,814 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 35 states. [2018-09-26 21:58:28,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:28,063 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-09-26 21:58:28,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-26 21:58:28,063 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 34 [2018-09-26 21:58:28,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:28,064 INFO L225 Difference]: With dead ends: 38 [2018-09-26 21:58:28,064 INFO L226 Difference]: Without dead ends: 36 [2018-09-26 21:58:28,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:28,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-09-26 21:58:28,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-09-26 21:58:28,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-26 21:58:28,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-09-26 21:58:28,068 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-09-26 21:58:28,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:28,069 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-09-26 21:58:28,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-26 21:58:28,069 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-09-26 21:58:28,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-26 21:58:28,069 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:28,070 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-09-26 21:58:28,070 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:28,070 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:28,070 INFO L82 PathProgramCache]: Analyzing trace with hash 176046432, now seen corresponding path program 32 times [2018-09-26 21:58:28,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:28,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:28,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:28,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:28,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:28,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:28,453 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:28,454 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:28,454 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:28,475 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:28,502 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:28,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:28,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:28,628 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:28,628 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2018-09-26 21:58:28,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-26 21:58:28,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-26 21:58:28,629 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:28,629 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 36 states. [2018-09-26 21:58:28,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:28,836 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-26 21:58:28,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-26 21:58:28,836 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2018-09-26 21:58:28,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:28,836 INFO L225 Difference]: With dead ends: 39 [2018-09-26 21:58:28,837 INFO L226 Difference]: Without dead ends: 37 [2018-09-26 21:58:28,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:28,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-26 21:58:28,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-26 21:58:28,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-26 21:58:28,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-26 21:58:28,840 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-09-26 21:58:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:28,840 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-26 21:58:28,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-26 21:58:28,841 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-26 21:58:28,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-26 21:58:28,841 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:28,841 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-09-26 21:58:28,841 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:28,842 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:28,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468230, now seen corresponding path program 33 times [2018-09-26 21:58:28,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:28,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:28,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:28,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:28,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:29,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:29,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:29,713 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:29,740 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-09-26 21:58:29,740 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:29,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:29,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:29,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2018-09-26 21:58:29,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-26 21:58:29,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-26 21:58:29,994 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:29,994 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 37 states. [2018-09-26 21:58:31,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:31,138 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-09-26 21:58:31,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-26 21:58:31,138 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 36 [2018-09-26 21:58:31,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:31,139 INFO L225 Difference]: With dead ends: 40 [2018-09-26 21:58:31,139 INFO L226 Difference]: Without dead ends: 38 [2018-09-26 21:58:31,139 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:31,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-09-26 21:58:31,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-09-26 21:58:31,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-26 21:58:31,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-09-26 21:58:31,141 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-09-26 21:58:31,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:31,141 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-09-26 21:58:31,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-26 21:58:31,141 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-09-26 21:58:31,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-09-26 21:58:31,142 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:31,142 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-09-26 21:58:31,142 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:31,142 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:31,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772896, now seen corresponding path program 34 times [2018-09-26 21:58:31,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:31,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:31,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:31,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:31,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:31,388 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:31,388 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:31,395 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:31,417 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:31,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:31,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:31,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:31,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2018-09-26 21:58:31,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-26 21:58:31,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-26 21:58:31,646 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:31,646 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 38 states. [2018-09-26 21:58:31,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:31,842 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-26 21:58:31,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-26 21:58:31,843 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 37 [2018-09-26 21:58:31,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:31,843 INFO L225 Difference]: With dead ends: 41 [2018-09-26 21:58:31,843 INFO L226 Difference]: Without dead ends: 39 [2018-09-26 21:58:31,843 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:31,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-26 21:58:31,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-26 21:58:31,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-26 21:58:31,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-26 21:58:31,846 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-09-26 21:58:31,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:31,847 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-26 21:58:31,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-26 21:58:31,847 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-26 21:58:31,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-26 21:58:31,847 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:31,848 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-09-26 21:58:31,848 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:31,848 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:31,848 INFO L82 PathProgramCache]: Analyzing trace with hash 440348358, now seen corresponding path program 35 times [2018-09-26 21:58:31,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:31,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:31,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:31,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:31,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:32,106 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:32,106 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:32,106 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 [2018-09-26 21:58:32,116 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:32,144 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-09-26 21:58:32,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:32,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:32,291 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:32,292 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2018-09-26 21:58:32,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-26 21:58:32,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-26 21:58:32,292 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:32,293 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 39 states. [2018-09-26 21:58:32,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:32,548 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-09-26 21:58:32,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-26 21:58:32,548 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 38 [2018-09-26 21:58:32,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:32,549 INFO L225 Difference]: With dead ends: 42 [2018-09-26 21:58:32,549 INFO L226 Difference]: Without dead ends: 40 [2018-09-26 21:58:32,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:32,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-26 21:58:32,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-26 21:58:32,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-26 21:58:32,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-09-26 21:58:32,552 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-09-26 21:58:32,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:32,552 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-09-26 21:58:32,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-26 21:58:32,552 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-09-26 21:58:32,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-26 21:58:32,553 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:32,553 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-09-26 21:58:32,553 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:32,553 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:32,553 INFO L82 PathProgramCache]: Analyzing trace with hash 765893344, now seen corresponding path program 36 times [2018-09-26 21:58:32,554 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:32,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:32,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:32,554 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:32,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:32,836 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:32,836 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 [2018-09-26 21:58:32,844 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:32,873 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-26 21:58:32,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:32,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:33,052 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:33,072 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:33,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2018-09-26 21:58:33,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-26 21:58:33,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-26 21:58:33,073 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:33,073 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 40 states. [2018-09-26 21:58:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:33,343 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-26 21:58:33,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-26 21:58:33,343 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 39 [2018-09-26 21:58:33,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:33,344 INFO L225 Difference]: With dead ends: 43 [2018-09-26 21:58:33,344 INFO L226 Difference]: Without dead ends: 41 [2018-09-26 21:58:33,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:33,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-26 21:58:33,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-26 21:58:33,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-26 21:58:33,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-26 21:58:33,346 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-09-26 21:58:33,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:33,346 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-26 21:58:33,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-26 21:58:33,346 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-26 21:58:33,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-26 21:58:33,347 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:33,347 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-09-26 21:58:33,347 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:33,347 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:33,347 INFO L82 PathProgramCache]: Analyzing trace with hash -2027113978, now seen corresponding path program 37 times [2018-09-26 21:58:33,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:33,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:33,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:33,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:33,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:33,593 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:33,593 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 [2018-09-26 21:58:33,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:33,624 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:33,772 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:33,772 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2018-09-26 21:58:33,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-26 21:58:33,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-26 21:58:33,772 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:33,773 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 41 states. [2018-09-26 21:58:34,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:34,012 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-09-26 21:58:34,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-26 21:58:34,012 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 40 [2018-09-26 21:58:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:34,013 INFO L225 Difference]: With dead ends: 44 [2018-09-26 21:58:34,013 INFO L226 Difference]: Without dead ends: 42 [2018-09-26 21:58:34,013 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:34,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-09-26 21:58:34,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-09-26 21:58:34,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-09-26 21:58:34,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-09-26 21:58:34,015 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-09-26 21:58:34,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:34,015 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-09-26 21:58:34,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-26 21:58:34,015 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-09-26 21:58:34,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-09-26 21:58:34,016 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:34,016 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-09-26 21:58:34,016 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:34,016 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:34,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972256, now seen corresponding path program 38 times [2018-09-26 21:58:34,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:34,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:34,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:34,018 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:34,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:34,601 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:34,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:34,609 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:34,634 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:34,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:34,636 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:34,757 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:34,778 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:34,778 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2018-09-26 21:58:34,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-26 21:58:34,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-26 21:58:34,779 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:34,779 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 42 states. [2018-09-26 21:58:34,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:34,968 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-26 21:58:34,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-26 21:58:34,969 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 41 [2018-09-26 21:58:34,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:34,970 INFO L225 Difference]: With dead ends: 45 [2018-09-26 21:58:34,970 INFO L226 Difference]: Without dead ends: 43 [2018-09-26 21:58:34,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:34,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-26 21:58:34,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-26 21:58:34,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-26 21:58:34,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-26 21:58:34,973 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-09-26 21:58:34,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:34,973 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-26 21:58:34,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-26 21:58:34,973 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-26 21:58:34,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-26 21:58:34,974 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:34,974 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-09-26 21:58:34,974 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:34,975 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:34,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495814, now seen corresponding path program 39 times [2018-09-26 21:58:34,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:34,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:34,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:34,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:34,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:35,227 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:35,227 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:35,228 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 [2018-09-26 21:58:35,235 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:35,278 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-09-26 21:58:35,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:35,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:35,417 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:35,417 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2018-09-26 21:58:35,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-26 21:58:35,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-26 21:58:35,418 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:35,418 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 43 states. [2018-09-26 21:58:35,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:35,852 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-09-26 21:58:35,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-26 21:58:35,853 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 42 [2018-09-26 21:58:35,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:35,853 INFO L225 Difference]: With dead ends: 46 [2018-09-26 21:58:35,853 INFO L226 Difference]: Without dead ends: 44 [2018-09-26 21:58:35,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:35,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-09-26 21:58:35,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-09-26 21:58:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-09-26 21:58:35,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-09-26 21:58:35,856 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-09-26 21:58:35,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:35,856 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-09-26 21:58:35,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-26 21:58:35,856 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-09-26 21:58:35,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-09-26 21:58:35,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:35,857 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-09-26 21:58:35,857 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:35,857 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:35,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791520, now seen corresponding path program 40 times [2018-09-26 21:58:35,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:35,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:35,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:35,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:35,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:36,199 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:36,199 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 [2018-09-26 21:58:36,207 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:36,236 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:36,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:36,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:36,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:36,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2018-09-26 21:58:36,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-26 21:58:36,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-26 21:58:36,441 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:36,441 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 44 states. [2018-09-26 21:58:36,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:36,676 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-26 21:58:36,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-26 21:58:36,677 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 43 [2018-09-26 21:58:36,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:36,677 INFO L225 Difference]: With dead ends: 47 [2018-09-26 21:58:36,677 INFO L226 Difference]: Without dead ends: 45 [2018-09-26 21:58:36,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:36,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-26 21:58:36,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-26 21:58:36,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-26 21:58:36,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-26 21:58:36,679 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-09-26 21:58:36,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:36,680 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-26 21:58:36,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-26 21:58:36,680 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-26 21:58:36,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-26 21:58:36,680 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:36,680 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-09-26 21:58:36,680 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:36,680 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:36,681 INFO L82 PathProgramCache]: Analyzing trace with hash -692041594, now seen corresponding path program 41 times [2018-09-26 21:58:36,681 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:36,681 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:36,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:36,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:36,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:36,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:37,141 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:37,141 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 [2018-09-26 21:58:37,150 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:37,183 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-09-26 21:58:37,183 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:37,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:37,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:37,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2018-09-26 21:58:37,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-26 21:58:37,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-26 21:58:37,342 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:37,342 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 45 states. [2018-09-26 21:58:37,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:37,738 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-09-26 21:58:37,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-26 21:58:37,739 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 44 [2018-09-26 21:58:37,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:37,739 INFO L225 Difference]: With dead ends: 48 [2018-09-26 21:58:37,739 INFO L226 Difference]: Without dead ends: 46 [2018-09-26 21:58:37,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:37,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-09-26 21:58:37,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-09-26 21:58:37,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-09-26 21:58:37,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-09-26 21:58:37,741 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-09-26 21:58:37,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:37,741 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-09-26 21:58:37,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-26 21:58:37,741 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-09-26 21:58:37,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-09-26 21:58:37,742 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:37,742 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-09-26 21:58:37,743 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:37,743 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:37,743 INFO L82 PathProgramCache]: Analyzing trace with hash 21543200, now seen corresponding path program 42 times [2018-09-26 21:58:37,743 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:37,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:37,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:37,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:37,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:38,352 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:38,352 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 [2018-09-26 21:58:38,361 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:38,392 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-09-26 21:58:38,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:38,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:38,542 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:38,542 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2018-09-26 21:58:38,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-26 21:58:38,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-26 21:58:38,543 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:38,544 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 46 states. [2018-09-26 21:58:38,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:38,821 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-26 21:58:38,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-26 21:58:38,822 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 45 [2018-09-26 21:58:38,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:38,822 INFO L225 Difference]: With dead ends: 49 [2018-09-26 21:58:38,823 INFO L226 Difference]: Without dead ends: 47 [2018-09-26 21:58:38,823 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:38,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-26 21:58:38,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-26 21:58:38,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-26 21:58:38,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-26 21:58:38,826 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-09-26 21:58:38,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:38,826 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-26 21:58:38,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-26 21:58:38,826 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-26 21:58:38,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-26 21:58:38,827 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:38,827 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-09-26 21:58:38,827 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:38,827 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:38,827 INFO L82 PathProgramCache]: Analyzing trace with hash 667835334, now seen corresponding path program 43 times [2018-09-26 21:58:38,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:38,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:38,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:38,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:38,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:39,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:39,234 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 [2018-09-26 21:58:39,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:39,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:39,404 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:39,424 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:39,424 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2018-09-26 21:58:39,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-26 21:58:39,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-26 21:58:39,425 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:39,425 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 47 states. [2018-09-26 21:58:39,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:39,718 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-09-26 21:58:39,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-26 21:58:39,719 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 46 [2018-09-26 21:58:39,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:39,720 INFO L225 Difference]: With dead ends: 50 [2018-09-26 21:58:39,720 INFO L226 Difference]: Without dead ends: 48 [2018-09-26 21:58:39,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:39,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-09-26 21:58:39,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-09-26 21:58:39,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-09-26 21:58:39,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-09-26 21:58:39,723 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-09-26 21:58:39,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:39,723 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-09-26 21:58:39,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-26 21:58:39,723 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-09-26 21:58:39,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-09-26 21:58:39,724 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:39,724 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-09-26 21:58:39,724 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:39,724 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:39,725 INFO L82 PathProgramCache]: Analyzing trace with hash -771944992, now seen corresponding path program 44 times [2018-09-26 21:58:39,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:39,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:39,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:39,726 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:39,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:40,047 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:40,047 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:40,055 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:40,081 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:40,082 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:40,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:40,262 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:40,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2018-09-26 21:58:40,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-26 21:58:40,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-26 21:58:40,264 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:40,264 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 48 states. [2018-09-26 21:58:40,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:40,626 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-26 21:58:40,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-26 21:58:40,626 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 47 [2018-09-26 21:58:40,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:40,627 INFO L225 Difference]: With dead ends: 51 [2018-09-26 21:58:40,627 INFO L226 Difference]: Without dead ends: 49 [2018-09-26 21:58:40,628 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:40,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-26 21:58:40,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-26 21:58:40,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-26 21:58:40,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-26 21:58:40,630 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-09-26 21:58:40,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:40,630 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-26 21:58:40,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-26 21:58:40,631 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-26 21:58:40,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-26 21:58:40,631 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:40,632 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-09-26 21:58:40,632 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:40,632 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:40,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505158, now seen corresponding path program 45 times [2018-09-26 21:58:40,633 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:40,633 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:40,633 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:40,633 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:40,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:41,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:41,126 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 [2018-09-26 21:58:41,134 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:41,170 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-09-26 21:58:41,170 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:41,172 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:41,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:41,364 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:41,364 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2018-09-26 21:58:41,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-26 21:58:41,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-26 21:58:41,365 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:41,365 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 49 states. [2018-09-26 21:58:41,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:41,803 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-09-26 21:58:41,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-26 21:58:41,803 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 48 [2018-09-26 21:58:41,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:41,804 INFO L225 Difference]: With dead ends: 52 [2018-09-26 21:58:41,804 INFO L226 Difference]: Without dead ends: 50 [2018-09-26 21:58:41,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:41,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-09-26 21:58:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-09-26 21:58:41,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-09-26 21:58:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-09-26 21:58:41,807 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-09-26 21:58:41,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:41,808 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-09-26 21:58:41,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-26 21:58:41,808 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-09-26 21:58:41,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-09-26 21:58:41,808 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:41,808 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-09-26 21:58:41,808 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:41,808 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:41,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081184, now seen corresponding path program 46 times [2018-09-26 21:58:41,809 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:41,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:41,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:41,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:41,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:42,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:42,224 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 [2018-09-26 21:58:42,231 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:42,258 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:42,258 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:42,260 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:42,632 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:42,633 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2018-09-26 21:58:42,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-26 21:58:42,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-26 21:58:42,633 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:42,634 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 50 states. [2018-09-26 21:58:42,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:42,935 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-26 21:58:42,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-26 21:58:42,936 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 49 [2018-09-26 21:58:42,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:42,936 INFO L225 Difference]: With dead ends: 53 [2018-09-26 21:58:42,937 INFO L226 Difference]: Without dead ends: 51 [2018-09-26 21:58:42,937 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:42,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-26 21:58:42,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-26 21:58:42,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-26 21:58:42,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-26 21:58:42,939 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-09-26 21:58:42,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:42,939 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-26 21:58:42,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-26 21:58:42,939 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-26 21:58:42,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-26 21:58:42,940 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:42,940 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-09-26 21:58:42,940 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:42,940 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:42,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192826, now seen corresponding path program 47 times [2018-09-26 21:58:42,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:42,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:42,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:42,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:42,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:42,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:43,351 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:43,351 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 [2018-09-26 21:58:43,359 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:43,401 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-09-26 21:58:43,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:43,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:43,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:43,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2018-09-26 21:58:43,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-26 21:58:43,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-26 21:58:43,636 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:43,636 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 51 states. [2018-09-26 21:58:43,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:43,880 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-09-26 21:58:43,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-26 21:58:43,883 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 50 [2018-09-26 21:58:43,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:43,883 INFO L225 Difference]: With dead ends: 54 [2018-09-26 21:58:43,883 INFO L226 Difference]: Without dead ends: 52 [2018-09-26 21:58:43,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:43,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-09-26 21:58:43,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-09-26 21:58:43,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-09-26 21:58:43,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-09-26 21:58:43,888 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-09-26 21:58:43,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:43,888 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-09-26 21:58:43,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-26 21:58:43,888 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-09-26 21:58:43,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-09-26 21:58:43,889 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:43,889 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-09-26 21:58:43,889 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:43,889 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:43,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593376, now seen corresponding path program 48 times [2018-09-26 21:58:43,890 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:43,890 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:43,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:43,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:43,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:44,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:44,281 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:44,287 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:44,325 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-26 21:58:44,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:44,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:44,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:44,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:44,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2018-09-26 21:58:44,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-26 21:58:44,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-26 21:58:44,502 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:44,502 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 52 states. [2018-09-26 21:58:44,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:44,721 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-26 21:58:44,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-26 21:58:44,721 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 51 [2018-09-26 21:58:44,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:44,722 INFO L225 Difference]: With dead ends: 55 [2018-09-26 21:58:44,722 INFO L226 Difference]: Without dead ends: 53 [2018-09-26 21:58:44,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:44,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-26 21:58:44,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-26 21:58:44,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-26 21:58:44,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-26 21:58:44,725 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-09-26 21:58:44,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:44,725 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-26 21:58:44,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-26 21:58:44,726 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-26 21:58:44,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-26 21:58:44,726 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:44,726 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-09-26 21:58:44,726 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:44,726 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:44,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1250314874, now seen corresponding path program 49 times [2018-09-26 21:58:44,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:44,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:44,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:44,727 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:44,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:45,585 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:45,585 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 [2018-09-26 21:58:45,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:45,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:45,818 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:45,818 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2018-09-26 21:58:45,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-26 21:58:45,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-26 21:58:45,819 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:45,819 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 53 states. [2018-09-26 21:58:46,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:46,169 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-09-26 21:58:46,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-26 21:58:46,170 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 52 [2018-09-26 21:58:46,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:46,171 INFO L225 Difference]: With dead ends: 56 [2018-09-26 21:58:46,171 INFO L226 Difference]: Without dead ends: 54 [2018-09-26 21:58:46,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:46,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-09-26 21:58:46,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-09-26 21:58:46,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-26 21:58:46,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-09-26 21:58:46,174 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-09-26 21:58:46,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:46,174 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-09-26 21:58:46,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-26 21:58:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-09-26 21:58:46,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-26 21:58:46,174 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:46,174 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-09-26 21:58:46,175 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:46,175 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:46,175 INFO L82 PathProgramCache]: Analyzing trace with hash -105059296, now seen corresponding path program 50 times [2018-09-26 21:58:46,175 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:46,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:46,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:46,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:46,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:46,735 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:46,735 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 [2018-09-26 21:58:46,744 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:46,796 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:46,797 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:46,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:47,254 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:47,254 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2018-09-26 21:58:47,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-26 21:58:47,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-26 21:58:47,255 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:47,255 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 54 states. [2018-09-26 21:58:47,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:47,507 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-26 21:58:47,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-26 21:58:47,508 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 53 [2018-09-26 21:58:47,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:47,508 INFO L225 Difference]: With dead ends: 57 [2018-09-26 21:58:47,508 INFO L226 Difference]: Without dead ends: 55 [2018-09-26 21:58:47,509 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:47,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-26 21:58:47,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-26 21:58:47,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-26 21:58:47,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-26 21:58:47,511 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-09-26 21:58:47,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:47,511 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-26 21:58:47,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-26 21:58:47,511 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-26 21:58:47,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-26 21:58:47,512 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:47,512 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-09-26 21:58:47,512 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:47,512 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:47,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125254, now seen corresponding path program 51 times [2018-09-26 21:58:47,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:47,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:47,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:47,513 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:47,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:47,894 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:47,894 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 [2018-09-26 21:58:47,902 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:47,941 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-09-26 21:58:47,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:47,944 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:48,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:48,171 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:48,172 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2018-09-26 21:58:48,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-26 21:58:48,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-26 21:58:48,173 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:48,173 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 55 states. [2018-09-26 21:58:48,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:48,463 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-09-26 21:58:48,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-26 21:58:48,463 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 54 [2018-09-26 21:58:48,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:48,464 INFO L225 Difference]: With dead ends: 58 [2018-09-26 21:58:48,464 INFO L226 Difference]: Without dead ends: 56 [2018-09-26 21:58:48,464 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:48,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-09-26 21:58:48,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-09-26 21:58:48,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-09-26 21:58:48,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-09-26 21:58:48,466 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-09-26 21:58:48,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:48,467 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-09-26 21:58:48,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-26 21:58:48,467 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-09-26 21:58:48,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-09-26 21:58:48,467 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:48,468 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-09-26 21:58:48,468 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:48,468 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:48,468 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107936, now seen corresponding path program 52 times [2018-09-26 21:58:48,468 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:48,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:48,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:48,469 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:48,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:48,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:48,822 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:48,823 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 [2018-09-26 21:58:48,830 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:48,864 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:48,864 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:48,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:49,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:49,100 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:49,100 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2018-09-26 21:58:49,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-26 21:58:49,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-26 21:58:49,101 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:49,102 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2018-09-26 21:58:49,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:49,471 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-26 21:58:49,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-26 21:58:49,472 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2018-09-26 21:58:49,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:49,473 INFO L225 Difference]: With dead ends: 59 [2018-09-26 21:58:49,473 INFO L226 Difference]: Without dead ends: 57 [2018-09-26 21:58:49,473 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:49,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-26 21:58:49,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-26 21:58:49,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-26 21:58:49,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-26 21:58:49,475 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-09-26 21:58:49,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:49,476 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-26 21:58:49,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-26 21:58:49,476 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-26 21:58:49,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-26 21:58:49,476 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:49,477 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-09-26 21:58:49,477 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:49,477 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:49,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832710, now seen corresponding path program 53 times [2018-09-26 21:58:49,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:49,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:49,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:49,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:49,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:49,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:49,942 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:49,943 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 [2018-09-26 21:58:49,951 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:50,000 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-09-26 21:58:50,000 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:50,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:50,288 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:50,288 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2018-09-26 21:58:50,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-26 21:58:50,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-26 21:58:50,289 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:50,289 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 57 states. [2018-09-26 21:58:50,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:50,645 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-09-26 21:58:50,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-26 21:58:50,645 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 56 [2018-09-26 21:58:50,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:50,646 INFO L225 Difference]: With dead ends: 60 [2018-09-26 21:58:50,646 INFO L226 Difference]: Without dead ends: 58 [2018-09-26 21:58:50,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:50,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-09-26 21:58:50,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-09-26 21:58:50,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-09-26 21:58:50,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-09-26 21:58:50,648 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-09-26 21:58:50,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:50,648 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-09-26 21:58:50,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-26 21:58:50,649 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-09-26 21:58:50,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-09-26 21:58:50,649 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:50,649 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-09-26 21:58:50,649 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:50,649 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:50,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895520, now seen corresponding path program 54 times [2018-09-26 21:58:50,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:50,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:50,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:50,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:50,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:51,205 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:51,205 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 [2018-09-26 21:58:51,213 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:58:51,269 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-26 21:58:51,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:51,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:51,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:51,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2018-09-26 21:58:51,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-26 21:58:51,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-26 21:58:51,564 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:51,564 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 58 states. [2018-09-26 21:58:51,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:51,831 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-26 21:58:51,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-26 21:58:51,832 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 57 [2018-09-26 21:58:51,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:51,832 INFO L225 Difference]: With dead ends: 61 [2018-09-26 21:58:51,832 INFO L226 Difference]: Without dead ends: 59 [2018-09-26 21:58:51,832 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:51,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-26 21:58:51,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-26 21:58:51,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-26 21:58:51,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-26 21:58:51,835 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-09-26 21:58:51,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:51,835 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-26 21:58:51,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-26 21:58:51,835 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-26 21:58:51,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-26 21:58:51,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:51,836 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-09-26 21:58:51,836 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:51,836 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:51,836 INFO L82 PathProgramCache]: Analyzing trace with hash -836059322, now seen corresponding path program 55 times [2018-09-26 21:58:51,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:51,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:51,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:51,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:51,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:52,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:52,230 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:52,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:58:52,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:52,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:52,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:52,490 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:52,490 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2018-09-26 21:58:52,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-26 21:58:52,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-26 21:58:52,491 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:52,491 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 59 states. [2018-09-26 21:58:52,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:52,897 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-09-26 21:58:52,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-26 21:58:52,897 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 58 [2018-09-26 21:58:52,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:52,898 INFO L225 Difference]: With dead ends: 62 [2018-09-26 21:58:52,898 INFO L226 Difference]: Without dead ends: 60 [2018-09-26 21:58:52,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:52,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-09-26 21:58:52,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-09-26 21:58:52,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-09-26 21:58:52,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-09-26 21:58:52,900 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-09-26 21:58:52,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:52,901 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-09-26 21:58:52,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-26 21:58:52,901 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-09-26 21:58:52,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-09-26 21:58:52,901 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:52,901 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-09-26 21:58:52,901 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:52,902 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:52,902 INFO L82 PathProgramCache]: Analyzing trace with hash -148039072, now seen corresponding path program 56 times [2018-09-26 21:58:52,902 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:52,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:52,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:52,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:58:52,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:53,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:53,340 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 [2018-09-26 21:58:53,348 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:58:53,381 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:58:53,381 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:53,384 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:53,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:53,585 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:53,585 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2018-09-26 21:58:53,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-26 21:58:53,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-26 21:58:53,586 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:53,586 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 60 states. [2018-09-26 21:58:53,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:53,858 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-26 21:58:53,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-26 21:58:53,858 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 59 [2018-09-26 21:58:53,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:53,859 INFO L225 Difference]: With dead ends: 63 [2018-09-26 21:58:53,859 INFO L226 Difference]: Without dead ends: 61 [2018-09-26 21:58:53,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:53,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-26 21:58:53,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-26 21:58:53,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-26 21:58:53,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-26 21:58:53,861 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-09-26 21:58:53,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:53,862 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-26 21:58:53,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-26 21:58:53,862 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-26 21:58:53,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-26 21:58:53,862 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:53,862 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-09-26 21:58:53,863 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:53,863 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:53,863 INFO L82 PathProgramCache]: Analyzing trace with hash -294247802, now seen corresponding path program 57 times [2018-09-26 21:58:53,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:53,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:53,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:53,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:53,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:54,292 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:54,293 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 [2018-09-26 21:58:54,299 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:58:54,348 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-09-26 21:58:54,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:54,350 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:54,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:54,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2018-09-26 21:58:54,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-26 21:58:54,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-26 21:58:54,576 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:54,576 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 61 states. [2018-09-26 21:58:54,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:54,974 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-09-26 21:58:54,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-26 21:58:54,975 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 60 [2018-09-26 21:58:54,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:54,975 INFO L225 Difference]: With dead ends: 64 [2018-09-26 21:58:54,975 INFO L226 Difference]: Without dead ends: 62 [2018-09-26 21:58:54,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:54,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-09-26 21:58:54,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-09-26 21:58:54,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-09-26 21:58:54,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-09-26 21:58:54,978 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-09-26 21:58:54,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:54,978 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-09-26 21:58:54,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-26 21:58:54,978 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-09-26 21:58:54,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-09-26 21:58:54,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:54,979 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-09-26 21:58:54,979 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:54,979 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:54,979 INFO L82 PathProgramCache]: Analyzing trace with hash -531751136, now seen corresponding path program 58 times [2018-09-26 21:58:54,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:54,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:54,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:54,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:54,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:55,453 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:55,453 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 [2018-09-26 21:58:55,461 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:58:55,497 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:58:55,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:55,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:55,721 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:55,722 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2018-09-26 21:58:55,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-26 21:58:55,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-26 21:58:55,723 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:55,723 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 62 states. [2018-09-26 21:58:56,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:56,290 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-26 21:58:56,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-26 21:58:56,290 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 61 [2018-09-26 21:58:56,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:56,291 INFO L225 Difference]: With dead ends: 65 [2018-09-26 21:58:56,291 INFO L226 Difference]: Without dead ends: 63 [2018-09-26 21:58:56,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:56,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-26 21:58:56,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-26 21:58:56,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-26 21:58:56,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-26 21:58:56,294 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-09-26 21:58:56,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:56,294 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-26 21:58:56,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-26 21:58:56,294 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-26 21:58:56,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-26 21:58:56,295 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:56,295 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-09-26 21:58:56,295 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:56,295 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:56,295 INFO L82 PathProgramCache]: Analyzing trace with hash 695580102, now seen corresponding path program 59 times [2018-09-26 21:58:56,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:56,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:56,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:56,296 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:56,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:58:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:57,054 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:58:57,055 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 [2018-09-26 21:58:57,063 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:58:57,111 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-09-26 21:58:57,111 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:58:57,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:58:57,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:58:57,409 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:58:57,410 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2018-09-26 21:58:57,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-26 21:58:57,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-26 21:58:57,411 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:58:57,411 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 63 states. [2018-09-26 21:58:57,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:58:57,700 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-09-26 21:58:57,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-26 21:58:57,700 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 62 [2018-09-26 21:58:57,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:58:57,700 INFO L225 Difference]: With dead ends: 66 [2018-09-26 21:58:57,700 INFO L226 Difference]: Without dead ends: 64 [2018-09-26 21:58:57,701 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:58:57,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-09-26 21:58:57,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-09-26 21:58:57,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-09-26 21:58:57,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-09-26 21:58:57,703 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-09-26 21:58:57,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:58:57,703 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-09-26 21:58:57,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-26 21:58:57,703 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-09-26 21:58:57,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-09-26 21:58:57,703 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:58:57,703 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-09-26 21:58:57,704 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:58:57,704 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:58:57,704 INFO L82 PathProgramCache]: Analyzing trace with hash 88142816, now seen corresponding path program 60 times [2018-09-26 21:58:57,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:58:57,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:58:57,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:57,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:58:57,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:58:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:00,057 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:00,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:59:00,065 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:59:00,119 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-26 21:59:00,120 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:00,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:00,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:00,342 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:00,343 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2018-09-26 21:59:00,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-26 21:59:00,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-26 21:59:00,344 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:00,344 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 64 states. [2018-09-26 21:59:00,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:00,781 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-26 21:59:00,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-26 21:59:00,781 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 63 [2018-09-26 21:59:00,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:00,782 INFO L225 Difference]: With dead ends: 67 [2018-09-26 21:59:00,782 INFO L226 Difference]: Without dead ends: 65 [2018-09-26 21:59:00,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:00,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-26 21:59:00,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-26 21:59:00,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-26 21:59:00,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-26 21:59:00,785 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-09-26 21:59:00,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:00,786 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-26 21:59:00,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-26 21:59:00,786 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-26 21:59:00,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-26 21:59:00,787 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:00,787 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-09-26 21:59:00,787 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:00,787 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:00,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543866, now seen corresponding path program 61 times [2018-09-26 21:59:00,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:00,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:00,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:00,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:00,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:00,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:01,340 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:01,340 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 [2018-09-26 21:59:01,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:01,385 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:01,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:01,622 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:01,622 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2018-09-26 21:59:01,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-26 21:59:01,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-26 21:59:01,623 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:01,623 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 65 states. [2018-09-26 21:59:02,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:02,056 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-09-26 21:59:02,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-26 21:59:02,057 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 64 [2018-09-26 21:59:02,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:02,057 INFO L225 Difference]: With dead ends: 68 [2018-09-26 21:59:02,057 INFO L226 Difference]: Without dead ends: 66 [2018-09-26 21:59:02,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:02,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-09-26 21:59:02,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-09-26 21:59:02,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-09-26 21:59:02,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-09-26 21:59:02,060 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-09-26 21:59:02,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:02,060 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-09-26 21:59:02,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-26 21:59:02,060 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-09-26 21:59:02,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-09-26 21:59:02,060 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:02,060 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-09-26 21:59:02,061 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:02,061 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:02,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223456, now seen corresponding path program 62 times [2018-09-26 21:59:02,061 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:02,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:02,061 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:02,062 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:02,062 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:03,668 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:03,669 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 [2018-09-26 21:59:03,678 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:59:03,716 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:59:03,716 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:03,718 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:03,970 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:03,970 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2018-09-26 21:59:03,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-26 21:59:03,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-26 21:59:03,972 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:03,972 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 66 states. [2018-09-26 21:59:04,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:04,462 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-26 21:59:04,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-26 21:59:04,462 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 65 [2018-09-26 21:59:04,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:04,463 INFO L225 Difference]: With dead ends: 69 [2018-09-26 21:59:04,463 INFO L226 Difference]: Without dead ends: 67 [2018-09-26 21:59:04,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:04,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-26 21:59:04,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-26 21:59:04,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-26 21:59:04,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-26 21:59:04,465 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-09-26 21:59:04,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:04,465 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-26 21:59:04,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-26 21:59:04,465 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-26 21:59:04,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-26 21:59:04,466 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:04,466 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-09-26 21:59:04,466 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:04,466 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:04,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774662, now seen corresponding path program 63 times [2018-09-26 21:59:04,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:04,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:04,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:04,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:04,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:05,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:05,603 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:05,603 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 [2018-09-26 21:59:05,612 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:59:05,730 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-09-26 21:59:05,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:05,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:06,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:06,158 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2018-09-26 21:59:06,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-26 21:59:06,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-26 21:59:06,161 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:06,161 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 67 states. [2018-09-26 21:59:06,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:06,882 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-09-26 21:59:06,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-26 21:59:06,882 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 66 [2018-09-26 21:59:06,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:06,883 INFO L225 Difference]: With dead ends: 70 [2018-09-26 21:59:06,883 INFO L226 Difference]: Without dead ends: 68 [2018-09-26 21:59:06,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:06,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-09-26 21:59:06,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-09-26 21:59:06,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-09-26 21:59:06,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-09-26 21:59:06,886 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-09-26 21:59:06,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:06,886 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-09-26 21:59:06,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-26 21:59:06,887 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-09-26 21:59:06,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-09-26 21:59:06,887 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:06,887 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-09-26 21:59:06,887 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:06,888 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:06,888 INFO L82 PathProgramCache]: Analyzing trace with hash -892596896, now seen corresponding path program 64 times [2018-09-26 21:59:06,888 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:06,888 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:06,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:06,889 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:06,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:07,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:07,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:07,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:59:07,628 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:59:07,685 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:59:07,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:07,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:07,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:07,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:07,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2018-09-26 21:59:07,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-26 21:59:07,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-26 21:59:07,956 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:07,956 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 68 states. [2018-09-26 21:59:08,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:08,287 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-26 21:59:08,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-26 21:59:08,288 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 67 [2018-09-26 21:59:08,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:08,288 INFO L225 Difference]: With dead ends: 71 [2018-09-26 21:59:08,289 INFO L226 Difference]: Without dead ends: 69 [2018-09-26 21:59:08,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:08,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-26 21:59:08,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-26 21:59:08,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-26 21:59:08,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-26 21:59:08,292 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-09-26 21:59:08,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:08,292 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-26 21:59:08,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-26 21:59:08,292 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-26 21:59:08,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-26 21:59:08,293 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:08,293 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-09-26 21:59:08,293 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:08,293 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:08,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703866, now seen corresponding path program 65 times [2018-09-26 21:59:08,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:08,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:08,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:08,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:08,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:08,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:08,834 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 [2018-09-26 21:59:08,841 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:59:08,898 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-09-26 21:59:08,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:08,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:09,158 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:09,159 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2018-09-26 21:59:09,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-26 21:59:09,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-26 21:59:09,160 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:09,160 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 69 states. [2018-09-26 21:59:09,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:09,574 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-09-26 21:59:09,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-26 21:59:09,574 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 68 [2018-09-26 21:59:09,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:09,575 INFO L225 Difference]: With dead ends: 72 [2018-09-26 21:59:09,575 INFO L226 Difference]: Without dead ends: 70 [2018-09-26 21:59:09,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:09,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-09-26 21:59:09,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-09-26 21:59:09,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-26 21:59:09,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-09-26 21:59:09,577 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-09-26 21:59:09,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:09,578 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-09-26 21:59:09,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-26 21:59:09,578 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-09-26 21:59:09,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-26 21:59:09,578 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:09,578 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-09-26 21:59:09,578 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:09,578 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:09,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718432, now seen corresponding path program 66 times [2018-09-26 21:59:09,579 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:09,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:09,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:09,579 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:09,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:10,069 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:10,069 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 [2018-09-26 21:59:10,076 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:59:10,128 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-09-26 21:59:10,128 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:10,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:10,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:10,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2018-09-26 21:59:10,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-26 21:59:10,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-26 21:59:10,679 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:10,679 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 70 states. [2018-09-26 21:59:11,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:11,167 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-26 21:59:11,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-26 21:59:11,167 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 69 [2018-09-26 21:59:11,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:11,168 INFO L225 Difference]: With dead ends: 73 [2018-09-26 21:59:11,168 INFO L226 Difference]: Without dead ends: 71 [2018-09-26 21:59:11,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-26 21:59:11,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-26 21:59:11,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-26 21:59:11,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-26 21:59:11,170 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-09-26 21:59:11,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:11,170 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-26 21:59:11,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-26 21:59:11,171 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-26 21:59:11,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-26 21:59:11,171 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:11,171 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-09-26 21:59:11,171 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:11,171 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:11,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438138, now seen corresponding path program 67 times [2018-09-26 21:59:11,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:11,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:11,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:11,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:11,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:11,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:11,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:11,831 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 [2018-09-26 21:59:11,838 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:11,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:11,880 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:12,128 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:12,128 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2018-09-26 21:59:12,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-26 21:59:12,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-26 21:59:12,129 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:12,129 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 71 states. [2018-09-26 21:59:12,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:12,681 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-09-26 21:59:12,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-26 21:59:12,681 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 70 [2018-09-26 21:59:12,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:12,682 INFO L225 Difference]: With dead ends: 74 [2018-09-26 21:59:12,682 INFO L226 Difference]: Without dead ends: 72 [2018-09-26 21:59:12,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:12,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-09-26 21:59:12,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-09-26 21:59:12,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-09-26 21:59:12,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-09-26 21:59:12,684 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-09-26 21:59:12,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:12,684 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-09-26 21:59:12,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-26 21:59:12,685 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-09-26 21:59:12,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-09-26 21:59:12,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:12,685 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-09-26 21:59:12,685 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:12,686 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:12,686 INFO L82 PathProgramCache]: Analyzing trace with hash 976119520, now seen corresponding path program 68 times [2018-09-26 21:59:12,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:12,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:12,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:12,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:12,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:12,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:13,249 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:13,249 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 [2018-09-26 21:59:13,256 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:59:13,294 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:59:13,295 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:13,297 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:13,557 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:13,558 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2018-09-26 21:59:13,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-26 21:59:13,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-26 21:59:13,559 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:13,559 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 72 states. [2018-09-26 21:59:14,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:14,044 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-26 21:59:14,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-26 21:59:14,045 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 71 [2018-09-26 21:59:14,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:14,045 INFO L225 Difference]: With dead ends: 75 [2018-09-26 21:59:14,045 INFO L226 Difference]: Without dead ends: 73 [2018-09-26 21:59:14,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:14,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-26 21:59:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-26 21:59:14,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-26 21:59:14,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-26 21:59:14,049 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-09-26 21:59:14,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:14,050 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-26 21:59:14,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-26 21:59:14,050 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-26 21:59:14,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-26 21:59:14,050 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:14,051 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-09-26 21:59:14,051 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:14,051 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:14,051 INFO L82 PathProgramCache]: Analyzing trace with hash 194930182, now seen corresponding path program 69 times [2018-09-26 21:59:14,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:14,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:14,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:14,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:14,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:14,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:14,590 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:14,590 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 [2018-09-26 21:59:14,596 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:59:14,670 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-09-26 21:59:14,670 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:14,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:16,279 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:16,280 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2018-09-26 21:59:16,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-26 21:59:16,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-26 21:59:16,281 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:16,281 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 73 states. [2018-09-26 21:59:17,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:17,052 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-09-26 21:59:17,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-26 21:59:17,053 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 72 [2018-09-26 21:59:17,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:17,053 INFO L225 Difference]: With dead ends: 76 [2018-09-26 21:59:17,053 INFO L226 Difference]: Without dead ends: 74 [2018-09-26 21:59:17,054 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:17,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-09-26 21:59:17,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-09-26 21:59:17,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-09-26 21:59:17,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-09-26 21:59:17,056 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-09-26 21:59:17,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:17,057 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-09-26 21:59:17,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-26 21:59:17,057 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-09-26 21:59:17,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-09-26 21:59:17,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:17,058 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-09-26 21:59:17,058 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:17,059 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:17,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864480, now seen corresponding path program 70 times [2018-09-26 21:59:17,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:17,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:17,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:17,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:17,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:17,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:17,985 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:17,985 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 [2018-09-26 21:59:17,993 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:59:18,033 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:59:18,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:18,036 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:18,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:18,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:18,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2018-09-26 21:59:18,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-26 21:59:18,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-26 21:59:18,320 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:18,320 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 74 states. [2018-09-26 21:59:18,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:18,879 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-26 21:59:18,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-26 21:59:18,879 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 73 [2018-09-26 21:59:18,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:18,880 INFO L225 Difference]: With dead ends: 77 [2018-09-26 21:59:18,880 INFO L226 Difference]: Without dead ends: 75 [2018-09-26 21:59:18,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:18,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-26 21:59:18,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-26 21:59:18,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-26 21:59:18,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-26 21:59:18,884 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-09-26 21:59:18,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:18,884 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-26 21:59:18,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-26 21:59:18,885 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-26 21:59:18,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-26 21:59:18,885 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:18,885 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-09-26 21:59:18,886 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:18,886 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:18,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779834, now seen corresponding path program 71 times [2018-09-26 21:59:18,886 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:18,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:18,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:18,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:18,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:19,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:19,481 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 [2018-09-26 21:59:19,489 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:59:19,553 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-09-26 21:59:19,553 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:19,557 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:19,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:19,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:19,992 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2018-09-26 21:59:19,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-26 21:59:19,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-26 21:59:19,994 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:19,994 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 75 states. [2018-09-26 21:59:20,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:20,456 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-09-26 21:59:20,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-26 21:59:20,457 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 74 [2018-09-26 21:59:20,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:20,457 INFO L225 Difference]: With dead ends: 78 [2018-09-26 21:59:20,457 INFO L226 Difference]: Without dead ends: 76 [2018-09-26 21:59:20,458 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:20,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-09-26 21:59:20,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-09-26 21:59:20,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-09-26 21:59:20,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-09-26 21:59:20,461 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-09-26 21:59:20,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:20,462 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-09-26 21:59:20,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-26 21:59:20,462 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-09-26 21:59:20,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-09-26 21:59:20,463 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:20,463 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-09-26 21:59:20,463 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:20,463 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:20,464 INFO L82 PathProgramCache]: Analyzing trace with hash 365428832, now seen corresponding path program 72 times [2018-09-26 21:59:20,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:20,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:20,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:20,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:20,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:21,081 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:21,081 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 [2018-09-26 21:59:21,088 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:59:21,153 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-26 21:59:21,153 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:21,156 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:21,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:21,441 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2018-09-26 21:59:21,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-26 21:59:21,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-26 21:59:21,442 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:21,442 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 76 states. [2018-09-26 21:59:21,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:21,951 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-26 21:59:21,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-26 21:59:21,952 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 75 [2018-09-26 21:59:21,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:21,952 INFO L225 Difference]: With dead ends: 79 [2018-09-26 21:59:21,953 INFO L226 Difference]: Without dead ends: 77 [2018-09-26 21:59:21,953 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:21,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-26 21:59:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-26 21:59:21,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-26 21:59:21,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-26 21:59:21,955 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-09-26 21:59:21,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:21,956 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-26 21:59:21,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-26 21:59:21,956 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-26 21:59:21,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-26 21:59:21,957 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:21,957 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-09-26 21:59:21,957 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:21,957 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:21,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1556611962, now seen corresponding path program 73 times [2018-09-26 21:59:21,958 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:21,958 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:21,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:21,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:21,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:22,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:22,575 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:22,575 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 [2018-09-26 21:59:22,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:22,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:22,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:22,939 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2018-09-26 21:59:22,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-26 21:59:22,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-26 21:59:22,941 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:22,941 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 77 states. [2018-09-26 21:59:23,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:23,536 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-09-26 21:59:23,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-26 21:59:23,536 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 76 [2018-09-26 21:59:23,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:23,537 INFO L225 Difference]: With dead ends: 80 [2018-09-26 21:59:23,537 INFO L226 Difference]: Without dead ends: 78 [2018-09-26 21:59:23,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:23,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-09-26 21:59:23,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-09-26 21:59:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-26 21:59:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-09-26 21:59:23,540 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-09-26 21:59:23,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:23,540 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-09-26 21:59:23,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-26 21:59:23,540 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-09-26 21:59:23,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-09-26 21:59:23,541 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:23,541 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-09-26 21:59:23,541 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:23,541 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:23,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334432, now seen corresponding path program 74 times [2018-09-26 21:59:23,541 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:23,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:23,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:23,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:23,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:24,177 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:24,177 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 [2018-09-26 21:59:24,184 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:59:24,225 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:59:24,226 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:24,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:24,527 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:24,527 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2018-09-26 21:59:24,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-26 21:59:24,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-26 21:59:24,529 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:24,529 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 78 states. [2018-09-26 21:59:25,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:25,126 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-26 21:59:25,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-26 21:59:25,126 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 77 [2018-09-26 21:59:25,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:25,127 INFO L225 Difference]: With dead ends: 81 [2018-09-26 21:59:25,127 INFO L226 Difference]: Without dead ends: 79 [2018-09-26 21:59:25,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:25,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-26 21:59:25,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-26 21:59:25,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-26 21:59:25,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-26 21:59:25,130 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-09-26 21:59:25,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:25,130 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-26 21:59:25,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-26 21:59:25,131 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-26 21:59:25,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-26 21:59:25,131 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:25,131 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-09-26 21:59:25,131 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:25,132 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:25,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600186, now seen corresponding path program 75 times [2018-09-26 21:59:25,132 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:25,132 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:25,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:25,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:25,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:25,746 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:25,747 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:59:25,754 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:59:25,821 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-09-26 21:59:25,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:25,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:26,199 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:26,199 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2018-09-26 21:59:26,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-26 21:59:26,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-26 21:59:26,201 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:26,201 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 79 states. [2018-09-26 21:59:26,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:26,850 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-09-26 21:59:26,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-26 21:59:26,850 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 78 [2018-09-26 21:59:26,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:26,851 INFO L225 Difference]: With dead ends: 82 [2018-09-26 21:59:26,851 INFO L226 Difference]: Without dead ends: 80 [2018-09-26 21:59:26,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:26,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-26 21:59:26,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-09-26 21:59:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-09-26 21:59:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-09-26 21:59:26,854 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-09-26 21:59:26,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:26,854 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-09-26 21:59:26,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-26 21:59:26,854 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-09-26 21:59:26,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-09-26 21:59:26,855 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:26,855 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-09-26 21:59:26,855 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:26,855 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:26,855 INFO L82 PathProgramCache]: Analyzing trace with hash -268903968, now seen corresponding path program 76 times [2018-09-26 21:59:26,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:26,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:26,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:26,856 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:26,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:27,551 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:27,551 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:59:27,559 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:59:27,603 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:59:27,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:27,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:27,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:27,929 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:27,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2018-09-26 21:59:27,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-26 21:59:27,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-26 21:59:27,931 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:27,931 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 80 states. [2018-09-26 21:59:29,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:29,202 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-26 21:59:29,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-26 21:59:29,203 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 79 [2018-09-26 21:59:29,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:29,203 INFO L225 Difference]: With dead ends: 83 [2018-09-26 21:59:29,203 INFO L226 Difference]: Without dead ends: 81 [2018-09-26 21:59:29,204 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:29,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-26 21:59:29,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-26 21:59:29,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-26 21:59:29,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-26 21:59:29,207 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-09-26 21:59:29,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:29,207 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-26 21:59:29,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-26 21:59:29,207 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-26 21:59:29,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-26 21:59:29,208 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:29,208 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-09-26 21:59:29,208 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:29,208 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:29,208 INFO L82 PathProgramCache]: Analyzing trace with hash 253907718, now seen corresponding path program 77 times [2018-09-26 21:59:29,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:29,209 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:29,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:29,209 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:29,209 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:29,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:29,844 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:29,844 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 [2018-09-26 21:59:29,852 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:59:29,921 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-09-26 21:59:29,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:29,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:30,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:30,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:30,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2018-09-26 21:59:30,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-26 21:59:30,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-26 21:59:30,249 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:30,250 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 81 states. [2018-09-26 21:59:30,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:30,666 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-09-26 21:59:30,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-26 21:59:30,667 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 80 [2018-09-26 21:59:30,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:30,667 INFO L225 Difference]: With dead ends: 84 [2018-09-26 21:59:30,667 INFO L226 Difference]: Without dead ends: 82 [2018-09-26 21:59:30,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:30,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-26 21:59:30,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-09-26 21:59:30,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-09-26 21:59:30,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-09-26 21:59:30,670 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-09-26 21:59:30,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:30,670 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-09-26 21:59:30,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-26 21:59:30,671 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-09-26 21:59:30,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-09-26 21:59:30,671 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:30,671 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-09-26 21:59:30,672 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:30,672 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:30,672 INFO L82 PathProgramCache]: Analyzing trace with hash -718799200, now seen corresponding path program 78 times [2018-09-26 21:59:30,672 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:30,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:30,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:30,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:30,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:31,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:31,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:31,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:59:31,734 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:59:31,814 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-09-26 21:59:31,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:31,817 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:32,204 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:32,204 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2018-09-26 21:59:32,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-26 21:59:32,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-26 21:59:32,206 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:32,206 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 82 states. [2018-09-26 21:59:32,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:32,975 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-26 21:59:32,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-26 21:59:32,976 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 81 [2018-09-26 21:59:32,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:32,976 INFO L225 Difference]: With dead ends: 85 [2018-09-26 21:59:32,976 INFO L226 Difference]: Without dead ends: 83 [2018-09-26 21:59:32,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:32,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-26 21:59:32,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-26 21:59:32,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-26 21:59:32,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-26 21:59:32,979 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-09-26 21:59:32,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:32,979 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-26 21:59:32,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-26 21:59:32,979 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-26 21:59:32,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-26 21:59:32,980 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:32,980 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-09-26 21:59:32,980 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:32,980 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:32,980 INFO L82 PathProgramCache]: Analyzing trace with hash -807942586, now seen corresponding path program 79 times [2018-09-26 21:59:32,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:32,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:32,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:32,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:32,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:33,757 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:33,757 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 [2018-09-26 21:59:33,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:33,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:34,209 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:34,209 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2018-09-26 21:59:34,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-26 21:59:34,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-26 21:59:34,211 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:34,211 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 83 states. [2018-09-26 21:59:34,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:34,878 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-09-26 21:59:34,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-26 21:59:34,879 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 82 [2018-09-26 21:59:34,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:34,879 INFO L225 Difference]: With dead ends: 86 [2018-09-26 21:59:34,880 INFO L226 Difference]: Without dead ends: 84 [2018-09-26 21:59:34,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:34,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-09-26 21:59:34,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-09-26 21:59:34,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-09-26 21:59:34,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-09-26 21:59:34,882 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-09-26 21:59:34,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:34,882 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-09-26 21:59:34,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-26 21:59:34,882 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-09-26 21:59:34,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-09-26 21:59:34,883 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:34,883 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-09-26 21:59:34,883 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:34,883 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:34,883 INFO L82 PathProgramCache]: Analyzing trace with hash 723579744, now seen corresponding path program 80 times [2018-09-26 21:59:34,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:34,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:34,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:34,884 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:34,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:35,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:35,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:35,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:59:35,826 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:59:35,875 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:59:35,875 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:35,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:37,061 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:37,061 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2018-09-26 21:59:37,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-26 21:59:37,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-26 21:59:37,063 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:37,063 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 84 states. [2018-09-26 21:59:37,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:37,652 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-26 21:59:37,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-26 21:59:37,653 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 83 [2018-09-26 21:59:37,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:37,653 INFO L225 Difference]: With dead ends: 87 [2018-09-26 21:59:37,653 INFO L226 Difference]: Without dead ends: 85 [2018-09-26 21:59:37,654 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:37,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-26 21:59:37,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-26 21:59:37,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-26 21:59:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-26 21:59:37,656 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-09-26 21:59:37,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:37,657 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-26 21:59:37,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-26 21:59:37,657 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-26 21:59:37,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-26 21:59:37,657 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:37,657 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-09-26 21:59:37,657 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:37,657 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:37,658 INFO L82 PathProgramCache]: Analyzing trace with hash 956131718, now seen corresponding path program 81 times [2018-09-26 21:59:37,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:37,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:37,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:37,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:37,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:38,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:38,373 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:38,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 21:59:38,380 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:59:38,452 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-09-26 21:59:38,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:38,455 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:38,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:38,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2018-09-26 21:59:38,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-26 21:59:38,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-26 21:59:38,787 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:38,788 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 85 states. [2018-09-26 21:59:39,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:39,454 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-09-26 21:59:39,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-26 21:59:39,455 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 84 [2018-09-26 21:59:39,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:39,455 INFO L225 Difference]: With dead ends: 88 [2018-09-26 21:59:39,455 INFO L226 Difference]: Without dead ends: 86 [2018-09-26 21:59:39,455 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:39,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-09-26 21:59:39,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-09-26 21:59:39,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-09-26 21:59:39,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-09-26 21:59:39,458 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-09-26 21:59:39,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:39,458 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-09-26 21:59:39,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-26 21:59:39,458 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-09-26 21:59:39,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-09-26 21:59:39,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:39,459 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-09-26 21:59:39,459 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:39,459 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:39,459 INFO L82 PathProgramCache]: Analyzing trace with hash -424691680, now seen corresponding path program 82 times [2018-09-26 21:59:39,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:39,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:39,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:39,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:39,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:39,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:40,323 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:40,323 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 [2018-09-26 21:59:40,333 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:59:40,387 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:59:40,387 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:40,390 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:40,826 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:40,826 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2018-09-26 21:59:40,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-26 21:59:40,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-26 21:59:40,827 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:40,827 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 86 states. [2018-09-26 21:59:41,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:41,379 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-26 21:59:41,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-26 21:59:41,379 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 85 [2018-09-26 21:59:41,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:41,380 INFO L225 Difference]: With dead ends: 89 [2018-09-26 21:59:41,380 INFO L226 Difference]: Without dead ends: 87 [2018-09-26 21:59:41,380 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:41,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-26 21:59:41,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-26 21:59:41,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-26 21:59:41,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-26 21:59:41,382 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-09-26 21:59:41,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:41,382 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-26 21:59:41,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-26 21:59:41,382 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-26 21:59:41,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-26 21:59:41,383 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:41,383 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-09-26 21:59:41,383 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:41,383 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:41,383 INFO L82 PathProgramCache]: Analyzing trace with hash -280544058, now seen corresponding path program 83 times [2018-09-26 21:59:41,384 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:41,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:41,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:41,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:41,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:42,091 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:42,091 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 [2018-09-26 21:59:42,099 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:59:42,197 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-09-26 21:59:42,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:42,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:42,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:42,564 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:42,564 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2018-09-26 21:59:42,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-26 21:59:42,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-26 21:59:42,566 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:42,566 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 87 states. [2018-09-26 21:59:43,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:43,324 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-09-26 21:59:43,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-26 21:59:43,324 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 86 [2018-09-26 21:59:43,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:43,325 INFO L225 Difference]: With dead ends: 90 [2018-09-26 21:59:43,325 INFO L226 Difference]: Without dead ends: 88 [2018-09-26 21:59:43,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:43,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-09-26 21:59:43,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-09-26 21:59:43,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-26 21:59:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-09-26 21:59:43,328 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-09-26 21:59:43,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:43,328 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-09-26 21:59:43,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-26 21:59:43,329 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-09-26 21:59:43,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-26 21:59:43,329 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:43,329 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-09-26 21:59:43,330 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:43,330 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:43,330 INFO L82 PathProgramCache]: Analyzing trace with hash -106935072, now seen corresponding path program 84 times [2018-09-26 21:59:43,330 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:43,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:43,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:43,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:43,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:44,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:44,126 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 [2018-09-26 21:59:44,135 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:59:44,208 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-26 21:59:44,208 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:44,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:44,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:44,567 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:44,568 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2018-09-26 21:59:44,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-26 21:59:44,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-26 21:59:44,569 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:44,569 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 88 states. [2018-09-26 21:59:45,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:45,160 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-26 21:59:45,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-26 21:59:45,161 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 87 [2018-09-26 21:59:45,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:45,161 INFO L225 Difference]: With dead ends: 91 [2018-09-26 21:59:45,161 INFO L226 Difference]: Without dead ends: 89 [2018-09-26 21:59:45,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:45,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-26 21:59:45,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-26 21:59:45,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-26 21:59:45,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-26 21:59:45,164 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-09-26 21:59:45,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:45,164 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-26 21:59:45,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-26 21:59:45,165 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-26 21:59:45,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-26 21:59:45,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:45,165 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-09-26 21:59:45,165 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:45,166 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:45,166 INFO L82 PathProgramCache]: Analyzing trace with hash 979976198, now seen corresponding path program 85 times [2018-09-26 21:59:45,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:45,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:45,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:45,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:45,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:45,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:45,879 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:45,879 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 [2018-09-26 21:59:45,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:45,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:46,311 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:46,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2018-09-26 21:59:46,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-26 21:59:46,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-26 21:59:46,314 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:46,314 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 89 states. [2018-09-26 21:59:46,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:46,826 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-09-26 21:59:46,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-26 21:59:46,826 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 88 [2018-09-26 21:59:46,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:46,827 INFO L225 Difference]: With dead ends: 92 [2018-09-26 21:59:46,827 INFO L226 Difference]: Without dead ends: 90 [2018-09-26 21:59:46,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:46,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-09-26 21:59:46,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-09-26 21:59:46,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-09-26 21:59:46,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-09-26 21:59:46,829 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-09-26 21:59:46,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:46,830 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-09-26 21:59:46,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-26 21:59:46,830 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-09-26 21:59:46,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-09-26 21:59:46,831 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:46,831 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-09-26 21:59:46,831 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:46,831 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:46,831 INFO L82 PathProgramCache]: Analyzing trace with hash 314487200, now seen corresponding path program 86 times [2018-09-26 21:59:46,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:46,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:46,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:46,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:46,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:47,654 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:47,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:47,654 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 [2018-09-26 21:59:47,661 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:59:47,709 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:59:47,709 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:47,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:48,066 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:48,066 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2018-09-26 21:59:48,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-26 21:59:48,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-26 21:59:48,068 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:48,068 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 90 states. [2018-09-26 21:59:48,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:48,588 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-26 21:59:48,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-26 21:59:48,588 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 89 [2018-09-26 21:59:48,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:48,589 INFO L225 Difference]: With dead ends: 93 [2018-09-26 21:59:48,589 INFO L226 Difference]: Without dead ends: 91 [2018-09-26 21:59:48,589 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:48,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-26 21:59:48,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-26 21:59:48,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-26 21:59:48,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-26 21:59:48,591 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-09-26 21:59:48,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:48,591 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-26 21:59:48,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-26 21:59:48,591 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-26 21:59:48,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-26 21:59:48,592 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:48,592 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-09-26 21:59:48,592 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:48,592 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:48,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164742, now seen corresponding path program 87 times [2018-09-26 21:59:48,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:48,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:48,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:48,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:48,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:49,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:49,329 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 [2018-09-26 21:59:49,339 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 21:59:49,417 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-09-26 21:59:49,417 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:49,420 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:49,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:49,784 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:49,784 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2018-09-26 21:59:49,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-26 21:59:49,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-26 21:59:49,786 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:49,787 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 91 states. [2018-09-26 21:59:50,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:50,352 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-09-26 21:59:50,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-26 21:59:50,352 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 90 [2018-09-26 21:59:50,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:50,352 INFO L225 Difference]: With dead ends: 94 [2018-09-26 21:59:50,353 INFO L226 Difference]: Without dead ends: 92 [2018-09-26 21:59:50,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:50,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-09-26 21:59:50,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-09-26 21:59:50,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-09-26 21:59:50,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-09-26 21:59:50,355 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-09-26 21:59:50,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:50,355 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-09-26 21:59:50,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-26 21:59:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-09-26 21:59:50,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-09-26 21:59:50,356 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:50,356 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-09-26 21:59:50,356 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:50,356 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:50,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364768, now seen corresponding path program 88 times [2018-09-26 21:59:50,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:50,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:50,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:50,357 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:50,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:51,128 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:51,128 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 [2018-09-26 21:59:51,135 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 21:59:51,191 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 21:59:51,191 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:51,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:51,563 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:51,563 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2018-09-26 21:59:51,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-26 21:59:51,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-26 21:59:51,565 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:51,565 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 92 states. [2018-09-26 21:59:52,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:52,079 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-26 21:59:52,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-26 21:59:52,079 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 91 [2018-09-26 21:59:52,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:52,080 INFO L225 Difference]: With dead ends: 95 [2018-09-26 21:59:52,080 INFO L226 Difference]: Without dead ends: 93 [2018-09-26 21:59:52,080 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:52,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-26 21:59:52,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-26 21:59:52,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-26 21:59:52,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-26 21:59:52,082 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-09-26 21:59:52,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:52,082 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-26 21:59:52,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-26 21:59:52,082 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-26 21:59:52,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-26 21:59:52,083 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:52,083 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-09-26 21:59:52,083 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:52,083 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:52,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663686, now seen corresponding path program 89 times [2018-09-26 21:59:52,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:52,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:52,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:52,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:52,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:52,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:52,952 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 [2018-09-26 21:59:52,960 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 21:59:53,098 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-09-26 21:59:53,099 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:53,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:53,508 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:53,508 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2018-09-26 21:59:53,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-26 21:59:53,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-26 21:59:53,509 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:53,510 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 93 states. [2018-09-26 21:59:54,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:54,055 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-09-26 21:59:54,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-26 21:59:54,055 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 92 [2018-09-26 21:59:54,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:54,056 INFO L225 Difference]: With dead ends: 96 [2018-09-26 21:59:54,056 INFO L226 Difference]: Without dead ends: 94 [2018-09-26 21:59:54,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:54,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-09-26 21:59:54,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-09-26 21:59:54,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-09-26 21:59:54,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-09-26 21:59:54,058 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-09-26 21:59:54,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:54,058 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-09-26 21:59:54,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-26 21:59:54,058 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-09-26 21:59:54,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-09-26 21:59:54,059 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:54,059 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-09-26 21:59:54,059 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:54,059 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:54,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930144, now seen corresponding path program 90 times [2018-09-26 21:59:54,060 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:54,060 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:54,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:54,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:54,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:54,850 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:54,850 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 [2018-09-26 21:59:54,859 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 21:59:54,942 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-09-26 21:59:54,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:54,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:55,333 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:55,333 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2018-09-26 21:59:55,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-26 21:59:55,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-26 21:59:55,335 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:55,335 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 94 states. [2018-09-26 21:59:55,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:55,932 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-26 21:59:55,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-26 21:59:55,932 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 93 [2018-09-26 21:59:55,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:55,933 INFO L225 Difference]: With dead ends: 97 [2018-09-26 21:59:55,933 INFO L226 Difference]: Without dead ends: 95 [2018-09-26 21:59:55,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:55,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-26 21:59:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-26 21:59:55,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-26 21:59:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-26 21:59:55,936 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-09-26 21:59:55,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:55,936 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-26 21:59:55,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-26 21:59:55,936 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-26 21:59:55,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-26 21:59:55,937 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:55,937 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-09-26 21:59:55,937 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:55,937 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:55,937 INFO L82 PathProgramCache]: Analyzing trace with hash 854092230, now seen corresponding path program 91 times [2018-09-26 21:59:55,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:55,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:55,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:55,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 21:59:55,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:56,745 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:56,745 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 [2018-09-26 21:59:56,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:56,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:57,196 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:57,196 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2018-09-26 21:59:57,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-26 21:59:57,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-26 21:59:57,198 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:57,198 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 95 states. [2018-09-26 21:59:58,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 21:59:58,003 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-09-26 21:59:58,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-26 21:59:58,004 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 94 [2018-09-26 21:59:58,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 21:59:58,004 INFO L225 Difference]: With dead ends: 98 [2018-09-26 21:59:58,004 INFO L226 Difference]: Without dead ends: 96 [2018-09-26 21:59:58,004 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 21:59:58,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-09-26 21:59:58,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-09-26 21:59:58,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-09-26 21:59:58,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-09-26 21:59:58,007 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-09-26 21:59:58,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 21:59:58,007 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-09-26 21:59:58,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-26 21:59:58,007 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-09-26 21:59:58,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-09-26 21:59:58,007 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 21:59:58,008 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-09-26 21:59:58,008 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 21:59:58,008 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 21:59:58,008 INFO L82 PathProgramCache]: Analyzing trace with hash 707051488, now seen corresponding path program 92 times [2018-09-26 21:59:58,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 21:59:58,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 21:59:58,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:58,009 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 21:59:58,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 21:59:58,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 21:59:58,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:58,858 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 21:59:58,858 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 [2018-09-26 21:59:58,865 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 21:59:58,918 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 21:59:58,918 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 21:59:58,921 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 21:59:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 21:59:59,371 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 21:59:59,371 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 95 [2018-09-26 21:59:59,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-26 21:59:59,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-26 21:59:59,373 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 21:59:59,373 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 96 states. [2018-09-26 22:00:00,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:00,225 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-26 22:00:00,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-26 22:00:00,225 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 95 [2018-09-26 22:00:00,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:00,226 INFO L225 Difference]: With dead ends: 99 [2018-09-26 22:00:00,226 INFO L226 Difference]: Without dead ends: 97 [2018-09-26 22:00:00,226 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:00,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-26 22:00:00,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-26 22:00:00,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-26 22:00:00,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-26 22:00:00,229 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-09-26 22:00:00,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:00,229 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-26 22:00:00,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-26 22:00:00,229 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-26 22:00:00,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-26 22:00:00,230 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:00,230 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-09-26 22:00:00,230 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:00,230 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:00,230 INFO L82 PathProgramCache]: Analyzing trace with hash 443755782, now seen corresponding path program 93 times [2018-09-26 22:00:00,230 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:00,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:00,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:00,231 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:00,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:01,051 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:01,052 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 [2018-09-26 22:00:01,059 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 22:00:01,145 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-09-26 22:00:01,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:01,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:01,574 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:01,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2018-09-26 22:00:01,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-26 22:00:01,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-26 22:00:01,577 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:01,577 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 97 states. [2018-09-26 22:00:02,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:02,196 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-09-26 22:00:02,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-26 22:00:02,196 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 96 [2018-09-26 22:00:02,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:02,197 INFO L225 Difference]: With dead ends: 100 [2018-09-26 22:00:02,197 INFO L226 Difference]: Without dead ends: 98 [2018-09-26 22:00:02,197 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:02,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-09-26 22:00:02,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-09-26 22:00:02,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-09-26 22:00:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-09-26 22:00:02,199 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-09-26 22:00:02,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:02,200 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-09-26 22:00:02,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-26 22:00:02,200 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-09-26 22:00:02,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-09-26 22:00:02,200 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:02,200 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-09-26 22:00:02,201 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:02,201 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:02,201 INFO L82 PathProgramCache]: Analyzing trace with hash 871523488, now seen corresponding path program 94 times [2018-09-26 22:00:02,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:02,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:02,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:02,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:02,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:02,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:03,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:03,252 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 [2018-09-26 22:00:03,260 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 22:00:03,319 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 22:00:03,319 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:03,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:03,755 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:03,755 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2018-09-26 22:00:03,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-26 22:00:03,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-26 22:00:03,757 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:03,757 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 98 states. [2018-09-26 22:00:04,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:04,615 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-26 22:00:04,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-26 22:00:04,615 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 97 [2018-09-26 22:00:04,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:04,616 INFO L225 Difference]: With dead ends: 101 [2018-09-26 22:00:04,616 INFO L226 Difference]: Without dead ends: 99 [2018-09-26 22:00:04,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:04,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-26 22:00:04,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-26 22:00:04,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-26 22:00:04,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-26 22:00:04,618 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-09-26 22:00:04,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:04,618 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-26 22:00:04,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-26 22:00:04,618 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-26 22:00:04,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-26 22:00:04,619 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:04,619 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-09-26 22:00:04,619 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:04,619 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:04,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420486, now seen corresponding path program 95 times [2018-09-26 22:00:04,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:04,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:04,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:04,620 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:04,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:05,667 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:05,667 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 [2018-09-26 22:00:05,676 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 22:00:05,763 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-26 22:00:05,763 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:05,766 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:06,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:06,187 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 98 [2018-09-26 22:00:06,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-26 22:00:06,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-26 22:00:06,188 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:06,188 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 99 states. [2018-09-26 22:00:06,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:06,871 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-09-26 22:00:06,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-26 22:00:06,871 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 98 [2018-09-26 22:00:06,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:06,872 INFO L225 Difference]: With dead ends: 102 [2018-09-26 22:00:06,872 INFO L226 Difference]: Without dead ends: 100 [2018-09-26 22:00:06,872 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:06,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-09-26 22:00:06,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-09-26 22:00:06,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-26 22:00:06,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-09-26 22:00:06,875 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-09-26 22:00:06,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:06,875 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-09-26 22:00:06,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-26 22:00:06,875 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-09-26 22:00:06,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-26 22:00:06,875 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:06,875 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-09-26 22:00:06,876 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:06,876 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:06,876 INFO L82 PathProgramCache]: Analyzing trace with hash 15325536, now seen corresponding path program 96 times [2018-09-26 22:00:06,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:06,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:06,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:06,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:06,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:07,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:07,757 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:07,758 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 [2018-09-26 22:00:07,765 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 22:00:07,865 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-26 22:00:07,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:07,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:08,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:08,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 99 [2018-09-26 22:00:08,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-26 22:00:08,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-26 22:00:08,302 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:08,302 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 100 states. [2018-09-26 22:00:08,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:08,923 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-26 22:00:08,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-26 22:00:08,924 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 99 [2018-09-26 22:00:08,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:08,924 INFO L225 Difference]: With dead ends: 103 [2018-09-26 22:00:08,924 INFO L226 Difference]: Without dead ends: 101 [2018-09-26 22:00:08,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:08,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-26 22:00:08,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-26 22:00:08,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-26 22:00:08,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-26 22:00:08,927 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-09-26 22:00:08,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:08,927 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-26 22:00:08,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-26 22:00:08,927 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-26 22:00:08,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-26 22:00:08,928 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:08,928 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-09-26 22:00:08,928 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:08,928 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:08,928 INFO L82 PathProgramCache]: Analyzing trace with hash 475087750, now seen corresponding path program 97 times [2018-09-26 22:00:08,928 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:08,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:08,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:08,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:08,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:08,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:09,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:09,845 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 [2018-09-26 22:00:09,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:00:09,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:09,909 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:10,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:10,326 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:10,327 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 100 [2018-09-26 22:00:10,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-26 22:00:10,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-26 22:00:10,329 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:10,329 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 101 states. [2018-09-26 22:00:11,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:11,210 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-09-26 22:00:11,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-26 22:00:11,210 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 100 [2018-09-26 22:00:11,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:11,211 INFO L225 Difference]: With dead ends: 104 [2018-09-26 22:00:11,211 INFO L226 Difference]: Without dead ends: 102 [2018-09-26 22:00:11,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:11,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-09-26 22:00:11,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-09-26 22:00:11,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-09-26 22:00:11,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-09-26 22:00:11,213 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-09-26 22:00:11,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:11,213 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-09-26 22:00:11,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-26 22:00:11,214 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-09-26 22:00:11,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-09-26 22:00:11,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:11,214 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-09-26 22:00:11,214 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:11,214 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:11,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814496, now seen corresponding path program 98 times [2018-09-26 22:00:11,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:11,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:11,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:11,215 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:00:11,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:12,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:12,111 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:12,111 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 22:00:12,119 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 22:00:12,184 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 22:00:12,184 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:12,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:12,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:12,626 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:12,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 101 [2018-09-26 22:00:12,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-26 22:00:12,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-26 22:00:12,628 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:12,628 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 102 states. [2018-09-26 22:00:13,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:13,592 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-26 22:00:13,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-26 22:00:13,592 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 101 [2018-09-26 22:00:13,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:13,593 INFO L225 Difference]: With dead ends: 105 [2018-09-26 22:00:13,593 INFO L226 Difference]: Without dead ends: 103 [2018-09-26 22:00:13,593 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:13,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-26 22:00:13,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-26 22:00:13,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-26 22:00:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-26 22:00:13,596 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-09-26 22:00:13,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:13,596 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-26 22:00:13,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-26 22:00:13,596 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-26 22:00:13,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-26 22:00:13,597 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:13,597 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-09-26 22:00:13,597 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:13,597 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:13,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670662, now seen corresponding path program 99 times [2018-09-26 22:00:13,597 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:13,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:13,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:13,598 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:13,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:14,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:14,544 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 [2018-09-26 22:00:14,551 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 22:00:14,647 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-09-26 22:00:14,647 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:14,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:15,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:15,091 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:15,091 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 102 [2018-09-26 22:00:15,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-26 22:00:15,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-26 22:00:15,093 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:15,093 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 103 states. [2018-09-26 22:00:15,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:15,973 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-09-26 22:00:15,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-26 22:00:15,973 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 102 [2018-09-26 22:00:15,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:15,974 INFO L225 Difference]: With dead ends: 106 [2018-09-26 22:00:15,974 INFO L226 Difference]: Without dead ends: 104 [2018-09-26 22:00:15,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:15,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-09-26 22:00:15,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-09-26 22:00:15,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-09-26 22:00:15,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-09-26 22:00:15,977 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-09-26 22:00:15,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:15,977 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-09-26 22:00:15,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-26 22:00:15,977 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-09-26 22:00:15,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-09-26 22:00:15,978 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:15,978 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-09-26 22:00:15,978 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:15,978 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:15,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080992, now seen corresponding path program 100 times [2018-09-26 22:00:15,979 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:15,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:15,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:15,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:15,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:16,930 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:16,930 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 [2018-09-26 22:00:16,937 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 22:00:16,999 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 22:00:16,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:17,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:17,440 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:17,440 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 103 [2018-09-26 22:00:17,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-26 22:00:17,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-26 22:00:17,442 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:17,442 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 104 states. [2018-09-26 22:00:18,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:18,386 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-26 22:00:18,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-26 22:00:18,386 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 103 [2018-09-26 22:00:18,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:18,387 INFO L225 Difference]: With dead ends: 107 [2018-09-26 22:00:18,387 INFO L226 Difference]: Without dead ends: 105 [2018-09-26 22:00:18,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:18,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-26 22:00:18,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-26 22:00:18,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-26 22:00:18,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-26 22:00:18,391 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-09-26 22:00:18,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:18,391 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-26 22:00:18,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-26 22:00:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-26 22:00:18,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-26 22:00:18,392 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:18,392 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-09-26 22:00:18,392 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:18,392 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:18,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1010833926, now seen corresponding path program 101 times [2018-09-26 22:00:18,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:18,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:18,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:18,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:18,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:19,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:19,404 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 [2018-09-26 22:00:19,413 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 22:00:19,519 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-09-26 22:00:19,519 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:19,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:19,966 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:19,966 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 104 [2018-09-26 22:00:19,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-26 22:00:19,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-26 22:00:19,968 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:19,968 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 105 states. [2018-09-26 22:00:20,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:20,855 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-09-26 22:00:20,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-26 22:00:20,855 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 104 [2018-09-26 22:00:20,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:20,856 INFO L225 Difference]: With dead ends: 108 [2018-09-26 22:00:20,856 INFO L226 Difference]: Without dead ends: 106 [2018-09-26 22:00:20,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:20,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-09-26 22:00:20,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-09-26 22:00:20,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-09-26 22:00:20,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-09-26 22:00:20,860 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-09-26 22:00:20,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:20,860 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-09-26 22:00:20,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-26 22:00:20,860 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-09-26 22:00:20,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-09-26 22:00:20,861 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:20,861 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-09-26 22:00:20,861 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:20,861 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:20,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1271076768, now seen corresponding path program 102 times [2018-09-26 22:00:20,862 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:20,862 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:20,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:20,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:20,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:21,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:21,914 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:21,915 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 [2018-09-26 22:00:21,921 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 22:00:22,013 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-09-26 22:00:22,013 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:22,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:22,594 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:22,595 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 105 [2018-09-26 22:00:22,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-26 22:00:22,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-26 22:00:22,597 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:22,597 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 106 states. [2018-09-26 22:00:23,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:23,568 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-26 22:00:23,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-26 22:00:23,569 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 105 [2018-09-26 22:00:23,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:23,569 INFO L225 Difference]: With dead ends: 109 [2018-09-26 22:00:23,569 INFO L226 Difference]: Without dead ends: 107 [2018-09-26 22:00:23,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:23,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-26 22:00:23,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-26 22:00:23,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-26 22:00:23,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-26 22:00:23,572 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-09-26 22:00:23,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:23,572 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-26 22:00:23,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-26 22:00:23,573 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-26 22:00:23,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-26 22:00:23,573 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:23,573 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-09-26 22:00:23,573 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:23,574 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:23,574 INFO L82 PathProgramCache]: Analyzing trace with hash 748670278, now seen corresponding path program 103 times [2018-09-26 22:00:23,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:23,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:23,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:23,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:23,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:24,592 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:24,593 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 [2018-09-26 22:00:24,601 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:00:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:24,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:25,131 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:25,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 106 [2018-09-26 22:00:25,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-26 22:00:25,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-26 22:00:25,133 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:25,134 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 107 states. [2018-09-26 22:00:26,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:26,156 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-09-26 22:00:26,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-26 22:00:26,157 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 106 [2018-09-26 22:00:26,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:26,157 INFO L225 Difference]: With dead ends: 110 [2018-09-26 22:00:26,157 INFO L226 Difference]: Without dead ends: 108 [2018-09-26 22:00:26,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:26,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-26 22:00:26,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-09-26 22:00:26,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-09-26 22:00:26,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-09-26 22:00:26,160 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-09-26 22:00:26,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:26,161 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-09-26 22:00:26,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-26 22:00:26,161 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-09-26 22:00:26,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-09-26 22:00:26,161 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:26,161 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-09-26 22:00:26,162 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:26,162 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:26,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1733938272, now seen corresponding path program 104 times [2018-09-26 22:00:26,162 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:26,162 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:26,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:26,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:00:26,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:26,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:27,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:27,266 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 [2018-09-26 22:00:27,273 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 22:00:27,331 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 22:00:27,331 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:27,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:27,899 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:27,899 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 107 [2018-09-26 22:00:27,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-26 22:00:27,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-26 22:00:27,901 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:27,901 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 108 states. [2018-09-26 22:00:28,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:28,686 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-26 22:00:28,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-26 22:00:28,686 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 107 [2018-09-26 22:00:28,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:28,686 INFO L225 Difference]: With dead ends: 111 [2018-09-26 22:00:28,686 INFO L226 Difference]: Without dead ends: 109 [2018-09-26 22:00:28,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:28,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-26 22:00:28,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-26 22:00:28,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-26 22:00:28,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-26 22:00:28,689 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-09-26 22:00:28,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:28,689 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-26 22:00:28,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-26 22:00:28,690 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-26 22:00:28,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-26 22:00:28,690 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:28,690 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-09-26 22:00:28,691 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:28,691 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:28,691 INFO L82 PathProgramCache]: Analyzing trace with hash -2082492282, now seen corresponding path program 105 times [2018-09-26 22:00:28,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:28,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:28,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:28,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:28,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:28,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:29,731 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:29,731 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 [2018-09-26 22:00:29,743 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 22:00:29,847 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-09-26 22:00:29,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:29,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:30,314 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:30,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 108 [2018-09-26 22:00:30,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-26 22:00:30,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-26 22:00:30,316 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:30,316 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 109 states. [2018-09-26 22:00:31,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:31,125 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-09-26 22:00:31,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-26 22:00:31,126 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 108 [2018-09-26 22:00:31,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:31,126 INFO L225 Difference]: With dead ends: 112 [2018-09-26 22:00:31,126 INFO L226 Difference]: Without dead ends: 110 [2018-09-26 22:00:31,126 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:31,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-09-26 22:00:31,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-09-26 22:00:31,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-09-26 22:00:31,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-09-26 22:00:31,129 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-09-26 22:00:31,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:31,129 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-09-26 22:00:31,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-26 22:00:31,130 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-09-26 22:00:31,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-09-26 22:00:31,130 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:31,130 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-09-26 22:00:31,131 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:31,131 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:31,131 INFO L82 PathProgramCache]: Analyzing trace with hash -132755168, now seen corresponding path program 106 times [2018-09-26 22:00:31,131 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:31,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:31,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:31,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:31,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:32,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:32,198 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 [2018-09-26 22:00:32,206 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 22:00:32,271 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 22:00:32,271 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:32,275 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:32,767 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:32,767 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 109 [2018-09-26 22:00:32,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-26 22:00:32,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-26 22:00:32,769 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:32,770 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 110 states. [2018-09-26 22:00:33,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:33,847 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-26 22:00:33,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-26 22:00:33,847 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 109 [2018-09-26 22:00:33,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:33,847 INFO L225 Difference]: With dead ends: 113 [2018-09-26 22:00:33,847 INFO L226 Difference]: Without dead ends: 111 [2018-09-26 22:00:33,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:33,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-26 22:00:33,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-26 22:00:33,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-26 22:00:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-26 22:00:33,850 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-09-26 22:00:33,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:33,850 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-26 22:00:33,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-26 22:00:33,850 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-26 22:00:33,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-26 22:00:33,851 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:33,851 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-09-26 22:00:33,851 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:33,851 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:33,851 INFO L82 PathProgramCache]: Analyzing trace with hash 179553222, now seen corresponding path program 107 times [2018-09-26 22:00:33,851 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:33,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:33,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:33,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:33,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:34,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:34,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:34,942 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2018-09-26 22:00:34,949 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 22:00:35,054 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-09-26 22:00:35,054 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:35,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:35,534 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:35,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 110 [2018-09-26 22:00:35,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-26 22:00:35,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-26 22:00:35,537 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:35,537 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 111 states. [2018-09-26 22:00:36,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:36,541 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-09-26 22:00:36,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-26 22:00:36,542 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 110 [2018-09-26 22:00:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:36,542 INFO L225 Difference]: With dead ends: 114 [2018-09-26 22:00:36,542 INFO L226 Difference]: Without dead ends: 112 [2018-09-26 22:00:36,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:36,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-09-26 22:00:36,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-09-26 22:00:36,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-26 22:00:36,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-09-26 22:00:36,544 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-09-26 22:00:36,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:36,545 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-09-26 22:00:36,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-26 22:00:36,545 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-09-26 22:00:36,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-26 22:00:36,545 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:36,545 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-09-26 22:00:36,545 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:36,546 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:36,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1271178720, now seen corresponding path program 108 times [2018-09-26 22:00:36,546 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:36,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:36,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:36,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:36,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:37,695 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:37,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:37,703 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 22:00:37,809 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-26 22:00:37,809 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:37,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:38,319 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:38,320 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 111 [2018-09-26 22:00:38,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-26 22:00:38,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-26 22:00:38,322 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:38,322 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 112 states. [2018-09-26 22:00:39,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:39,549 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-26 22:00:39,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-26 22:00:39,550 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 111 [2018-09-26 22:00:39,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:39,550 INFO L225 Difference]: With dead ends: 115 [2018-09-26 22:00:39,550 INFO L226 Difference]: Without dead ends: 113 [2018-09-26 22:00:39,550 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:39,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-26 22:00:39,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-26 22:00:39,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-26 22:00:39,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-26 22:00:39,554 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-09-26 22:00:39,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:39,554 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-26 22:00:39,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-26 22:00:39,554 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-26 22:00:39,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-26 22:00:39,554 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:39,555 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-09-26 22:00:39,555 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:39,555 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:39,555 INFO L82 PathProgramCache]: Analyzing trace with hash 751830790, now seen corresponding path program 109 times [2018-09-26 22:00:39,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:39,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:39,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:39,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:39,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:40,665 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:40,665 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:40,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:00:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:40,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:41,248 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:41,248 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 112 [2018-09-26 22:00:41,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-26 22:00:41,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-26 22:00:41,250 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:41,250 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 113 states. [2018-09-26 22:00:42,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:42,215 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-09-26 22:00:42,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-26 22:00:42,215 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 112 [2018-09-26 22:00:42,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:42,216 INFO L225 Difference]: With dead ends: 116 [2018-09-26 22:00:42,216 INFO L226 Difference]: Without dead ends: 114 [2018-09-26 22:00:42,216 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:42,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-09-26 22:00:42,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-09-26 22:00:42,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-09-26 22:00:42,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-09-26 22:00:42,219 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-09-26 22:00:42,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:42,219 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-09-26 22:00:42,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-26 22:00:42,219 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-09-26 22:00:42,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-09-26 22:00:42,220 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:42,220 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-09-26 22:00:42,220 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:42,220 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:42,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1831914144, now seen corresponding path program 110 times [2018-09-26 22:00:42,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:42,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:42,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:42,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:00:42,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:43,336 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:43,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:43,343 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 22:00:43,404 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 22:00:43,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:43,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:43,919 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:43,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 113 [2018-09-26 22:00:43,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-26 22:00:43,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-26 22:00:43,922 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:43,922 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 114 states. [2018-09-26 22:00:45,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:45,030 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-26 22:00:45,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-26 22:00:45,031 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 113 [2018-09-26 22:00:45,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:45,031 INFO L225 Difference]: With dead ends: 117 [2018-09-26 22:00:45,031 INFO L226 Difference]: Without dead ends: 115 [2018-09-26 22:00:45,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:45,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-26 22:00:45,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-26 22:00:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-26 22:00:45,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-26 22:00:45,034 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-09-26 22:00:45,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:45,035 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-26 22:00:45,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-26 22:00:45,035 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-26 22:00:45,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-26 22:00:45,035 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:45,035 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-09-26 22:00:45,036 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:45,036 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:45,036 INFO L82 PathProgramCache]: Analyzing trace with hash 954759750, now seen corresponding path program 111 times [2018-09-26 22:00:45,036 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:45,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:45,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:45,037 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:45,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:46,275 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:46,275 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:46,283 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 22:00:46,411 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 57 check-sat command(s) [2018-09-26 22:00:46,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:46,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:46,916 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:46,917 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 114 [2018-09-26 22:00:46,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-26 22:00:46,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-26 22:00:46,919 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:46,919 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 115 states. [2018-09-26 22:00:47,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:47,773 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-09-26 22:00:47,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-26 22:00:47,774 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 114 [2018-09-26 22:00:47,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:47,774 INFO L225 Difference]: With dead ends: 118 [2018-09-26 22:00:47,774 INFO L226 Difference]: Without dead ends: 116 [2018-09-26 22:00:47,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:47,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-09-26 22:00:47,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-09-26 22:00:47,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-09-26 22:00:47,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 116 transitions. [2018-09-26 22:00:47,777 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 116 transitions. Word has length 114 [2018-09-26 22:00:47,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:47,778 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 116 transitions. [2018-09-26 22:00:47,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-26 22:00:47,778 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 116 transitions. [2018-09-26 22:00:47,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2018-09-26 22:00:47,778 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:47,778 INFO L375 BasicCegarLoop]: trace histogram [112, 1, 1, 1] [2018-09-26 22:00:47,778 INFO L423 AbstractCegarLoop]: === Iteration 113 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:47,779 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:47,779 INFO L82 PathProgramCache]: Analyzing trace with hash -467222688, now seen corresponding path program 112 times [2018-09-26 22:00:47,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:47,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:47,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:47,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:47,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:47,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:48,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:48,965 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:48,965 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:48,973 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 22:00:49,042 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 22:00:49,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:49,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:49,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6328 backedges. 0 proven. 6328 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:49,575 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:49,575 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 115 [2018-09-26 22:00:49,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-26 22:00:49,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-26 22:00:49,577 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:49,578 INFO L87 Difference]: Start difference. First operand 116 states and 116 transitions. Second operand 116 states. [2018-09-26 22:00:50,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:50,768 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-26 22:00:50,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-26 22:00:50,768 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 115 [2018-09-26 22:00:50,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:50,768 INFO L225 Difference]: With dead ends: 119 [2018-09-26 22:00:50,768 INFO L226 Difference]: Without dead ends: 117 [2018-09-26 22:00:50,768 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:50,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-26 22:00:50,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-26 22:00:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-26 22:00:50,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-26 22:00:50,771 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 115 [2018-09-26 22:00:50,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:50,771 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-26 22:00:50,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-26 22:00:50,771 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-26 22:00:50,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-26 22:00:50,771 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:50,771 INFO L375 BasicCegarLoop]: trace histogram [113, 1, 1, 1] [2018-09-26 22:00:50,772 INFO L423 AbstractCegarLoop]: === Iteration 114 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:50,772 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:50,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1599005306, now seen corresponding path program 113 times [2018-09-26 22:00:50,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:50,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:50,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:50,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:50,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:51,933 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:51,933 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:51,940 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 22:00:52,054 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2018-09-26 22:00:52,054 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:52,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:52,578 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:52,578 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 116 [2018-09-26 22:00:52,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-09-26 22:00:52,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-09-26 22:00:52,580 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:52,581 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 117 states. [2018-09-26 22:00:53,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:53,459 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2018-09-26 22:00:53,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-26 22:00:53,460 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 116 [2018-09-26 22:00:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:53,460 INFO L225 Difference]: With dead ends: 120 [2018-09-26 22:00:53,460 INFO L226 Difference]: Without dead ends: 118 [2018-09-26 22:00:53,460 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:53,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-09-26 22:00:53,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-09-26 22:00:53,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-09-26 22:00:53,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-09-26 22:00:53,463 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 116 [2018-09-26 22:00:53,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:53,463 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-09-26 22:00:53,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-09-26 22:00:53,463 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-09-26 22:00:53,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-09-26 22:00:53,464 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:53,464 INFO L375 BasicCegarLoop]: trace histogram [114, 1, 1, 1] [2018-09-26 22:00:53,464 INFO L423 AbstractCegarLoop]: === Iteration 115 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:53,464 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:53,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1970439200, now seen corresponding path program 114 times [2018-09-26 22:00:53,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:53,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:53,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:53,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:53,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:54,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:54,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:54,696 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 22:00:54,806 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 58 check-sat command(s) [2018-09-26 22:00:54,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:00:54,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6555 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:55,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:55,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 117 [2018-09-26 22:00:55,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-26 22:00:55,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-26 22:00:55,343 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:55,343 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 118 states. [2018-09-26 22:00:56,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:56,451 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-26 22:00:56,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-26 22:00:56,451 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 117 [2018-09-26 22:00:56,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:56,452 INFO L225 Difference]: With dead ends: 121 [2018-09-26 22:00:56,452 INFO L226 Difference]: Without dead ends: 119 [2018-09-26 22:00:56,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:56,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-26 22:00:56,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-26 22:00:56,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-26 22:00:56,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-26 22:00:56,456 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 117 [2018-09-26 22:00:56,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:56,456 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-26 22:00:56,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-26 22:00:56,456 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-26 22:00:56,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-26 22:00:56,457 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:56,457 INFO L375 BasicCegarLoop]: trace histogram [115, 1, 1, 1] [2018-09-26 22:00:56,457 INFO L423 AbstractCegarLoop]: === Iteration 116 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:56,457 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:56,457 INFO L82 PathProgramCache]: Analyzing trace with hash 954069190, now seen corresponding path program 115 times [2018-09-26 22:00:56,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:56,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:56,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:56,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:00:56,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:57,680 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:00:57,680 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:00:57,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:00:57,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:00:57,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:00:58,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:00:58,300 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:00:58,300 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 118 [2018-09-26 22:00:58,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-26 22:00:58,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-26 22:00:58,302 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:00:58,302 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 119 states. [2018-09-26 22:00:59,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:00:59,222 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2018-09-26 22:00:59,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-26 22:00:59,222 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 118 [2018-09-26 22:00:59,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:00:59,222 INFO L225 Difference]: With dead ends: 122 [2018-09-26 22:00:59,222 INFO L226 Difference]: Without dead ends: 120 [2018-09-26 22:00:59,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:00:59,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2018-09-26 22:00:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2018-09-26 22:00:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-09-26 22:00:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 120 transitions. [2018-09-26 22:00:59,225 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 120 transitions. Word has length 118 [2018-09-26 22:00:59,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:00:59,225 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 120 transitions. [2018-09-26 22:00:59,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-26 22:00:59,225 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 120 transitions. [2018-09-26 22:00:59,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2018-09-26 22:00:59,226 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:00:59,226 INFO L375 BasicCegarLoop]: trace histogram [116, 1, 1, 1] [2018-09-26 22:00:59,226 INFO L423 AbstractCegarLoop]: === Iteration 117 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:00:59,226 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:00:59,226 INFO L82 PathProgramCache]: Analyzing trace with hash -488630048, now seen corresponding path program 116 times [2018-09-26 22:00:59,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:00:59,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:00:59,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:59,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:00:59,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:00:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:00,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:00,484 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:01:00,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:01:00,493 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 22:01:00,558 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 22:01:00,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:01:00,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:01:01,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 0 proven. 6786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:01,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:01:01,114 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 119 [2018-09-26 22:01:01,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-26 22:01:01,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-26 22:01:01,117 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:01:01,117 INFO L87 Difference]: Start difference. First operand 120 states and 120 transitions. Second operand 120 states. [2018-09-26 22:01:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:01:02,159 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-26 22:01:02,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-26 22:01:02,159 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 119 [2018-09-26 22:01:02,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:01:02,159 INFO L225 Difference]: With dead ends: 123 [2018-09-26 22:01:02,160 INFO L226 Difference]: Without dead ends: 121 [2018-09-26 22:01:02,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:01:02,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-26 22:01:02,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-26 22:01:02,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-26 22:01:02,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-26 22:01:02,162 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 119 [2018-09-26 22:01:02,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:01:02,162 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-26 22:01:02,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-26 22:01:02,162 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-26 22:01:02,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-26 22:01:02,163 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:01:02,163 INFO L375 BasicCegarLoop]: trace histogram [117, 1, 1, 1] [2018-09-26 22:01:02,163 INFO L423 AbstractCegarLoop]: === Iteration 118 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:01:02,163 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:01:02,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2032333830, now seen corresponding path program 117 times [2018-09-26 22:01:02,163 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:01:02,163 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:01:02,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:02,164 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:01:02,164 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:03,417 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:01:03,417 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:01:03,424 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 22:01:03,549 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2018-09-26 22:01:03,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:01:03,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:01:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:04,115 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:01:04,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 120 [2018-09-26 22:01:04,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-09-26 22:01:04,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-09-26 22:01:04,118 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:01:04,118 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 121 states. [2018-09-26 22:01:05,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:01:05,236 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2018-09-26 22:01:05,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-26 22:01:05,236 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 120 [2018-09-26 22:01:05,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:01:05,236 INFO L225 Difference]: With dead ends: 124 [2018-09-26 22:01:05,237 INFO L226 Difference]: Without dead ends: 122 [2018-09-26 22:01:05,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:01:05,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2018-09-26 22:01:05,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2018-09-26 22:01:05,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-09-26 22:01:05,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2018-09-26 22:01:05,239 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 120 [2018-09-26 22:01:05,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:01:05,239 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2018-09-26 22:01:05,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-09-26 22:01:05,239 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2018-09-26 22:01:05,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-09-26 22:01:05,240 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:01:05,240 INFO L375 BasicCegarLoop]: trace histogram [118, 1, 1, 1] [2018-09-26 22:01:05,240 INFO L423 AbstractCegarLoop]: === Iteration 119 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:01:05,240 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:01:05,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1422164576, now seen corresponding path program 118 times [2018-09-26 22:01:05,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:01:05,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:01:05,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:05,241 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:01:05,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:06,553 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:01:06,553 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:01:06,561 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 22:01:06,635 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 22:01:06,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:01:06,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:01:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7021 backedges. 0 proven. 7021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:07,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:01:07,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 121 [2018-09-26 22:01:07,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-26 22:01:07,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-26 22:01:07,212 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:01:07,212 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 122 states. [2018-09-26 22:01:08,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:01:08,217 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-26 22:01:08,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-26 22:01:08,217 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 121 [2018-09-26 22:01:08,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:01:08,218 INFO L225 Difference]: With dead ends: 125 [2018-09-26 22:01:08,218 INFO L226 Difference]: Without dead ends: 123 [2018-09-26 22:01:08,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:01:08,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-26 22:01:08,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-26 22:01:08,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-26 22:01:08,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-26 22:01:08,220 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 121 [2018-09-26 22:01:08,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:01:08,220 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-26 22:01:08,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-26 22:01:08,220 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-26 22:01:08,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-26 22:01:08,221 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:01:08,221 INFO L375 BasicCegarLoop]: trace histogram [119, 1, 1, 1] [2018-09-26 22:01:08,221 INFO L423 AbstractCegarLoop]: === Iteration 120 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:01:08,221 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:01:08,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1137432762, now seen corresponding path program 119 times [2018-09-26 22:01:08,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:01:08,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:01:08,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:08,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:01:08,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:08,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:09,561 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:01:09,561 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:01:09,568 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 22:01:09,696 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2018-09-26 22:01:09,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:01:09,699 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:01:10,260 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:10,281 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:01:10,281 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 122 [2018-09-26 22:01:10,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-09-26 22:01:10,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-09-26 22:01:10,284 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:01:10,284 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 123 states. [2018-09-26 22:01:11,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:01:11,390 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2018-09-26 22:01:11,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-26 22:01:11,390 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 122 [2018-09-26 22:01:11,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:01:11,390 INFO L225 Difference]: With dead ends: 126 [2018-09-26 22:01:11,390 INFO L226 Difference]: Without dead ends: 124 [2018-09-26 22:01:11,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:01:11,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-09-26 22:01:11,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2018-09-26 22:01:11,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-26 22:01:11,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 124 transitions. [2018-09-26 22:01:11,394 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 124 transitions. Word has length 122 [2018-09-26 22:01:11,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:01:11,394 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 124 transitions. [2018-09-26 22:01:11,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-09-26 22:01:11,394 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 124 transitions. [2018-09-26 22:01:11,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-26 22:01:11,395 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:01:11,395 INFO L375 BasicCegarLoop]: trace histogram [120, 1, 1, 1] [2018-09-26 22:01:11,395 INFO L423 AbstractCegarLoop]: === Iteration 121 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:01:11,395 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:01:11,395 INFO L82 PathProgramCache]: Analyzing trace with hash -900681120, now seen corresponding path program 120 times [2018-09-26 22:01:11,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:01:11,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:01:11,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:11,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:01:11,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:12,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:12,727 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:01:12,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:01:12,734 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 22:01:12,855 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-26 22:01:12,855 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:01:12,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:01:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7260 backedges. 0 proven. 7260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:13,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:01:13,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 123 [2018-09-26 22:01:13,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-26 22:01:13,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-26 22:01:13,463 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:01:13,463 INFO L87 Difference]: Start difference. First operand 124 states and 124 transitions. Second operand 124 states. [2018-09-26 22:01:14,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:01:14,678 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-26 22:01:14,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-26 22:01:14,678 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 123 [2018-09-26 22:01:14,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:01:14,679 INFO L225 Difference]: With dead ends: 127 [2018-09-26 22:01:14,679 INFO L226 Difference]: Without dead ends: 125 [2018-09-26 22:01:14,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:01:14,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-26 22:01:14,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-26 22:01:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-26 22:01:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-26 22:01:14,681 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 123 [2018-09-26 22:01:14,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:01:14,682 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-26 22:01:14,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-26 22:01:14,682 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-26 22:01:14,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-26 22:01:14,682 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:01:14,682 INFO L375 BasicCegarLoop]: trace histogram [121, 1, 1, 1] [2018-09-26 22:01:14,682 INFO L423 AbstractCegarLoop]: === Iteration 122 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:01:14,683 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:01:14,683 INFO L82 PathProgramCache]: Analyzing trace with hash 2143652486, now seen corresponding path program 121 times [2018-09-26 22:01:14,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:01:14,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:01:14,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:14,683 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:01:14,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:16,039 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:01:16,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:01:16,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:01:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:16,117 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:01:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7381 backedges. 0 proven. 7381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:16,706 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:01:16,706 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 124 [2018-09-26 22:01:16,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-26 22:01:16,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-26 22:01:16,709 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:01:16,709 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 125 states. [2018-09-26 22:01:17,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:01:17,771 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-09-26 22:01:17,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-26 22:01:17,772 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 124 [2018-09-26 22:01:17,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:01:17,772 INFO L225 Difference]: With dead ends: 128 [2018-09-26 22:01:17,772 INFO L226 Difference]: Without dead ends: 126 [2018-09-26 22:01:17,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:01:17,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-09-26 22:01:17,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-09-26 22:01:17,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-09-26 22:01:17,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 126 transitions. [2018-09-26 22:01:17,775 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 126 transitions. Word has length 124 [2018-09-26 22:01:17,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:01:17,775 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 126 transitions. [2018-09-26 22:01:17,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-26 22:01:17,775 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 126 transitions. [2018-09-26 22:01:17,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-09-26 22:01:17,775 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:01:17,775 INFO L375 BasicCegarLoop]: trace histogram [122, 1, 1, 1] [2018-09-26 22:01:17,775 INFO L423 AbstractCegarLoop]: === Iteration 123 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:01:17,776 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:01:17,776 INFO L82 PathProgramCache]: Analyzing trace with hash 2028713760, now seen corresponding path program 122 times [2018-09-26 22:01:17,776 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:01:17,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:01:17,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:17,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:01:17,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:19,137 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:01:19,137 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:01:19,145 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 22:01:19,214 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 22:01:19,214 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:01:19,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:01:19,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 0 proven. 7503 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:19,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:01:19,835 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 125 [2018-09-26 22:01:19,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-26 22:01:19,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-26 22:01:19,838 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:01:19,838 INFO L87 Difference]: Start difference. First operand 126 states and 126 transitions. Second operand 126 states. [2018-09-26 22:01:20,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:01:20,803 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-26 22:01:20,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-26 22:01:20,804 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 125 [2018-09-26 22:01:20,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:01:20,804 INFO L225 Difference]: With dead ends: 129 [2018-09-26 22:01:20,804 INFO L226 Difference]: Without dead ends: 127 [2018-09-26 22:01:20,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:01:20,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-26 22:01:20,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-26 22:01:20,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-26 22:01:20,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-26 22:01:20,807 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 125 [2018-09-26 22:01:20,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:01:20,807 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-26 22:01:20,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-26 22:01:20,807 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-26 22:01:20,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-26 22:01:20,807 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:01:20,808 INFO L375 BasicCegarLoop]: trace histogram [123, 1, 1, 1] [2018-09-26 22:01:20,808 INFO L423 AbstractCegarLoop]: === Iteration 124 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:01:20,808 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:01:20,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1534386746, now seen corresponding path program 123 times [2018-09-26 22:01:20,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:01:20,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:01:20,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:20,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:01:20,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:22,198 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:01:22,198 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:01:22,205 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 22:01:22,338 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2018-09-26 22:01:22,339 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:01:22,342 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:01:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:22,945 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:01:22,946 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 126 [2018-09-26 22:01:22,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-09-26 22:01:22,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-09-26 22:01:22,948 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:01:22,948 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 127 states. [2018-09-26 22:01:24,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:01:24,063 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2018-09-26 22:01:24,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-26 22:01:24,063 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 126 [2018-09-26 22:01:24,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:01:24,063 INFO L225 Difference]: With dead ends: 130 [2018-09-26 22:01:24,063 INFO L226 Difference]: Without dead ends: 128 [2018-09-26 22:01:24,064 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:01:24,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-09-26 22:01:24,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-09-26 22:01:24,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-09-26 22:01:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-09-26 22:01:24,066 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 126 [2018-09-26 22:01:24,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:01:24,066 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-09-26 22:01:24,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-09-26 22:01:24,066 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-09-26 22:01:24,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-09-26 22:01:24,067 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:01:24,067 INFO L375 BasicCegarLoop]: trace histogram [124, 1, 1, 1] [2018-09-26 22:01:24,067 INFO L423 AbstractCegarLoop]: === Iteration 125 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:01:24,067 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:01:24,067 INFO L82 PathProgramCache]: Analyzing trace with hash -321352736, now seen corresponding path program 124 times [2018-09-26 22:01:24,067 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:01:24,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:01:24,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:24,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:01:24,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:25,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:01:25,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:01:25,482 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 22:01:25,572 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 22:01:25,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:01:25,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:01:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7750 backedges. 0 proven. 7750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:26,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:01:26,157 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 127 [2018-09-26 22:01:26,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-26 22:01:26,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-26 22:01:26,159 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:01:26,159 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 128 states. [2018-09-26 22:01:27,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:01:27,506 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-26 22:01:27,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-26 22:01:27,507 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 127 [2018-09-26 22:01:27,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:01:27,507 INFO L225 Difference]: With dead ends: 131 [2018-09-26 22:01:27,507 INFO L226 Difference]: Without dead ends: 129 [2018-09-26 22:01:27,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:01:27,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-26 22:01:27,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-26 22:01:27,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-26 22:01:27,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-26 22:01:27,511 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 127 [2018-09-26 22:01:27,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:01:27,511 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-26 22:01:27,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-26 22:01:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-26 22:01:27,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-26 22:01:27,511 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:01:27,511 INFO L375 BasicCegarLoop]: trace histogram [125, 1, 1, 1] [2018-09-26 22:01:27,512 INFO L423 AbstractCegarLoop]: === Iteration 126 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:01:27,512 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:01:27,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1372004090, now seen corresponding path program 125 times [2018-09-26 22:01:27,512 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:01:27,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:01:27,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:27,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:01:27,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:28,922 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:01:28,922 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:01:28,930 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 22:01:29,063 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 64 check-sat command(s) [2018-09-26 22:01:29,063 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:01:29,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:01:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 0 proven. 7875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:29,691 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:01:29,691 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 128 [2018-09-26 22:01:29,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-09-26 22:01:29,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-09-26 22:01:29,694 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:01:29,694 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 129 states. [2018-09-26 22:01:31,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:01:31,045 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2018-09-26 22:01:31,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-26 22:01:31,045 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 128 [2018-09-26 22:01:31,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:01:31,046 INFO L225 Difference]: With dead ends: 132 [2018-09-26 22:01:31,046 INFO L226 Difference]: Without dead ends: 130 [2018-09-26 22:01:31,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:01:31,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-26 22:01:31,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2018-09-26 22:01:31,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-09-26 22:01:31,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 130 transitions. [2018-09-26 22:01:31,049 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 130 transitions. Word has length 128 [2018-09-26 22:01:31,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:01:31,050 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 130 transitions. [2018-09-26 22:01:31,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-09-26 22:01:31,050 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 130 transitions. [2018-09-26 22:01:31,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2018-09-26 22:01:31,050 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:01:31,050 INFO L375 BasicCegarLoop]: trace histogram [126, 1, 1, 1] [2018-09-26 22:01:31,051 INFO L423 AbstractCegarLoop]: === Iteration 127 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:01:31,051 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:01:31,051 INFO L82 PathProgramCache]: Analyzing trace with hash 417542304, now seen corresponding path program 126 times [2018-09-26 22:01:31,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:01:31,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:01:31,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:31,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:01:31,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:32,481 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:01:32,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:01:32,488 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 22:01:32,619 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 64 check-sat command(s) [2018-09-26 22:01:32,619 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:01:32,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:01:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:33,275 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:01:33,275 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 129 [2018-09-26 22:01:33,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-26 22:01:33,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-26 22:01:33,278 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:01:33,278 INFO L87 Difference]: Start difference. First operand 130 states and 130 transitions. Second operand 130 states. [2018-09-26 22:01:34,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:01:34,630 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-26 22:01:34,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-26 22:01:34,631 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 129 [2018-09-26 22:01:34,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:01:34,631 INFO L225 Difference]: With dead ends: 133 [2018-09-26 22:01:34,631 INFO L226 Difference]: Without dead ends: 131 [2018-09-26 22:01:34,631 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:01:34,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-26 22:01:34,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-26 22:01:34,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-26 22:01:34,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-26 22:01:34,634 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 129 [2018-09-26 22:01:34,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:01:34,634 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-26 22:01:34,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-26 22:01:34,634 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-26 22:01:34,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-26 22:01:34,635 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:01:34,635 INFO L375 BasicCegarLoop]: trace histogram [127, 1, 1, 1] [2018-09-26 22:01:34,635 INFO L423 AbstractCegarLoop]: === Iteration 128 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:01:34,635 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:01:34,635 INFO L82 PathProgramCache]: Analyzing trace with hash 58905670, now seen corresponding path program 127 times [2018-09-26 22:01:34,635 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:01:34,635 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:01:34,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:34,636 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:01:34,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:36,135 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:01:36,135 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:01:36,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:01:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:36,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:01:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:36,871 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:01:36,871 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 130 [2018-09-26 22:01:36,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-26 22:01:36,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-26 22:01:36,874 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:01:36,874 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 131 states. [2018-09-26 22:01:38,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:01:38,277 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2018-09-26 22:01:38,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-26 22:01:38,278 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 130 [2018-09-26 22:01:38,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:01:38,279 INFO L225 Difference]: With dead ends: 134 [2018-09-26 22:01:38,279 INFO L226 Difference]: Without dead ends: 132 [2018-09-26 22:01:38,279 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:01:38,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-09-26 22:01:38,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2018-09-26 22:01:38,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2018-09-26 22:01:38,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2018-09-26 22:01:38,282 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 130 [2018-09-26 22:01:38,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:01:38,283 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2018-09-26 22:01:38,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-26 22:01:38,283 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2018-09-26 22:01:38,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2018-09-26 22:01:38,283 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:01:38,284 INFO L375 BasicCegarLoop]: trace histogram [128, 1, 1, 1] [2018-09-26 22:01:38,284 INFO L423 AbstractCegarLoop]: === Iteration 129 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:01:38,284 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:01:38,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1826071904, now seen corresponding path program 128 times [2018-09-26 22:01:38,284 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:01:38,284 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:01:38,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:38,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:01:38,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:39,797 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:01:39,797 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:01:39,806 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 22:01:39,872 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 22:01:39,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:01:39,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:01:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 0 proven. 8256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:40,557 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:01:40,557 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 131 [2018-09-26 22:01:40,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-26 22:01:40,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-26 22:01:40,560 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:01:40,560 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 132 states. [2018-09-26 22:01:41,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:01:41,769 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-26 22:01:41,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-26 22:01:41,769 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 131 [2018-09-26 22:01:41,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:01:41,770 INFO L225 Difference]: With dead ends: 135 [2018-09-26 22:01:41,770 INFO L226 Difference]: Without dead ends: 133 [2018-09-26 22:01:41,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:01:41,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-26 22:01:41,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-26 22:01:41,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-26 22:01:41,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-26 22:01:41,773 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 131 [2018-09-26 22:01:41,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:01:41,774 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-26 22:01:41,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-26 22:01:41,774 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-26 22:01:41,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-26 22:01:41,774 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:01:41,775 INFO L375 BasicCegarLoop]: trace histogram [129, 1, 1, 1] [2018-09-26 22:01:41,775 INFO L423 AbstractCegarLoop]: === Iteration 130 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:01:41,775 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:01:41,775 INFO L82 PathProgramCache]: Analyzing trace with hash 773650310, now seen corresponding path program 129 times [2018-09-26 22:01:41,775 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:01:41,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:01:41,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:41,776 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:01:41,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:43,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:43,317 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:01:43,317 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:01:43,325 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 22:01:43,468 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2018-09-26 22:01:43,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:01:43,472 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:01:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8385 backedges. 0 proven. 8385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:44,130 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:01:44,131 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 132 [2018-09-26 22:01:44,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-09-26 22:01:44,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-09-26 22:01:44,133 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:01:44,133 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 133 states. [2018-09-26 22:01:45,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:01:45,262 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2018-09-26 22:01:45,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-09-26 22:01:45,262 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 132 [2018-09-26 22:01:45,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:01:45,262 INFO L225 Difference]: With dead ends: 136 [2018-09-26 22:01:45,262 INFO L226 Difference]: Without dead ends: 134 [2018-09-26 22:01:45,263 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:01:45,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-09-26 22:01:45,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2018-09-26 22:01:45,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2018-09-26 22:01:45,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 134 transitions. [2018-09-26 22:01:45,266 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 134 transitions. Word has length 132 [2018-09-26 22:01:45,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:01:45,266 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 134 transitions. [2018-09-26 22:01:45,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-09-26 22:01:45,266 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 134 transitions. [2018-09-26 22:01:45,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-09-26 22:01:45,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:01:45,267 INFO L375 BasicCegarLoop]: trace histogram [130, 1, 1, 1] [2018-09-26 22:01:45,267 INFO L423 AbstractCegarLoop]: === Iteration 131 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:01:45,267 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:01:45,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1786648032, now seen corresponding path program 130 times [2018-09-26 22:01:45,267 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:01:45,267 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:01:45,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:45,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:01:45,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:46,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:01:46,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:01:46,843 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 22:01:46,925 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 22:01:46,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:01:46,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:01:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8515 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:47,605 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:01:47,605 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 133 [2018-09-26 22:01:47,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-26 22:01:47,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-26 22:01:47,608 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:01:47,608 INFO L87 Difference]: Start difference. First operand 134 states and 134 transitions. Second operand 134 states. [2018-09-26 22:01:48,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:01:48,816 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-26 22:01:48,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-09-26 22:01:48,816 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 133 [2018-09-26 22:01:48,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:01:48,817 INFO L225 Difference]: With dead ends: 137 [2018-09-26 22:01:48,817 INFO L226 Difference]: Without dead ends: 135 [2018-09-26 22:01:48,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:01:48,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-26 22:01:48,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-26 22:01:48,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-26 22:01:48,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-26 22:01:48,819 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 133 [2018-09-26 22:01:48,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:01:48,820 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-26 22:01:48,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-26 22:01:48,820 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-26 22:01:48,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-26 22:01:48,820 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:01:48,820 INFO L375 BasicCegarLoop]: trace histogram [131, 1, 1, 1] [2018-09-26 22:01:48,820 INFO L423 AbstractCegarLoop]: === Iteration 132 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:01:48,820 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:01:48,821 INFO L82 PathProgramCache]: Analyzing trace with hash 448481990, now seen corresponding path program 131 times [2018-09-26 22:01:48,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:01:48,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:01:48,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:48,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:01:48,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:50,339 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:01:50,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:01:50,345 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-26 22:01:50,493 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 67 check-sat command(s) [2018-09-26 22:01:50,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:01:50,497 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:01:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:51,185 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:01:51,185 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 134 [2018-09-26 22:01:51,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-09-26 22:01:51,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-09-26 22:01:51,188 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:01:51,188 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 135 states. [2018-09-26 22:01:52,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:01:52,703 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-09-26 22:01:52,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-09-26 22:01:52,703 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 134 [2018-09-26 22:01:52,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:01:52,703 INFO L225 Difference]: With dead ends: 138 [2018-09-26 22:01:52,703 INFO L226 Difference]: Without dead ends: 136 [2018-09-26 22:01:52,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:01:52,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-09-26 22:01:52,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-09-26 22:01:52,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-26 22:01:52,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 136 transitions. [2018-09-26 22:01:52,706 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 136 transitions. Word has length 134 [2018-09-26 22:01:52,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:01:52,706 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 136 transitions. [2018-09-26 22:01:52,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-09-26 22:01:52,706 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 136 transitions. [2018-09-26 22:01:52,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-26 22:01:52,706 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:01:52,706 INFO L375 BasicCegarLoop]: trace histogram [132, 1, 1, 1] [2018-09-26 22:01:52,706 INFO L423 AbstractCegarLoop]: === Iteration 133 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:01:52,707 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:01:52,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1018035936, now seen corresponding path program 132 times [2018-09-26 22:01:52,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:01:52,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:01:52,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:52,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:01:52,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:54,288 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:01:54,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:01:54,296 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-26 22:01:54,432 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-26 22:01:54,433 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:01:54,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:01:55,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:55,101 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:01:55,101 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 135 [2018-09-26 22:01:55,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-26 22:01:55,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-26 22:01:55,104 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:01:55,104 INFO L87 Difference]: Start difference. First operand 136 states and 136 transitions. Second operand 136 states. [2018-09-26 22:01:56,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:01:56,619 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-26 22:01:56,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-26 22:01:56,619 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 135 [2018-09-26 22:01:56,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:01:56,620 INFO L225 Difference]: With dead ends: 139 [2018-09-26 22:01:56,620 INFO L226 Difference]: Without dead ends: 137 [2018-09-26 22:01:56,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:01:56,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-26 22:01:56,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-26 22:01:56,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-26 22:01:56,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-26 22:01:56,622 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 135 [2018-09-26 22:01:56,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:01:56,622 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-26 22:01:56,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-26 22:01:56,622 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-26 22:01:56,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-26 22:01:56,623 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:01:56,623 INFO L375 BasicCegarLoop]: trace histogram [133, 1, 1, 1] [2018-09-26 22:01:56,623 INFO L423 AbstractCegarLoop]: === Iteration 134 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:01:56,623 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:01:56,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1494339078, now seen corresponding path program 133 times [2018-09-26 22:01:56,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:01:56,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:01:56,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:56,624 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:01:56,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:01:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:58,213 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:01:58,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:01:58,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:01:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:01:58,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:01:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8911 backedges. 0 proven. 8911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:01:58,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:01:58,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135] total 136 [2018-09-26 22:01:58,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-26 22:01:58,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-26 22:01:58,987 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:01:58,987 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 137 states. [2018-09-26 22:02:00,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:02:00,561 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2018-09-26 22:02:00,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-09-26 22:02:00,562 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 136 [2018-09-26 22:02:00,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:02:00,562 INFO L225 Difference]: With dead ends: 140 [2018-09-26 22:02:00,562 INFO L226 Difference]: Without dead ends: 138 [2018-09-26 22:02:00,562 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:02:00,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-09-26 22:02:00,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-09-26 22:02:00,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-09-26 22:02:00,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-09-26 22:02:00,565 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 136 [2018-09-26 22:02:00,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:02:00,565 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-09-26 22:02:00,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-26 22:02:00,565 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-09-26 22:02:00,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-09-26 22:02:00,565 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:02:00,565 INFO L375 BasicCegarLoop]: trace histogram [134, 1, 1, 1] [2018-09-26 22:02:00,566 INFO L423 AbstractCegarLoop]: === Iteration 135 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:02:00,566 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:02:00,566 INFO L82 PathProgramCache]: Analyzing trace with hash -920132704, now seen corresponding path program 134 times [2018-09-26 22:02:00,566 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:02:00,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:02:00,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:02:00,566 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-26 22:02:00,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:02:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:02:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:02:02,163 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:02:02,163 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:02:02,169 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-26 22:02:02,243 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-26 22:02:02,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:02:02,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:02:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:02:02,964 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:02:02,964 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 137 [2018-09-26 22:02:02,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-26 22:02:02,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-26 22:02:02,967 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:02:02,967 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 138 states. [2018-09-26 22:02:04,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:02:04,223 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-26 22:02:04,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-26 22:02:04,223 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 137 [2018-09-26 22:02:04,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:02:04,224 INFO L225 Difference]: With dead ends: 141 [2018-09-26 22:02:04,224 INFO L226 Difference]: Without dead ends: 139 [2018-09-26 22:02:04,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:02:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-26 22:02:04,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-26 22:02:04,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-26 22:02:04,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-26 22:02:04,226 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 137 [2018-09-26 22:02:04,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:02:04,226 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-26 22:02:04,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-26 22:02:04,227 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-26 22:02:04,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-26 22:02:04,227 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:02:04,227 INFO L375 BasicCegarLoop]: trace histogram [135, 1, 1, 1] [2018-09-26 22:02:04,227 INFO L423 AbstractCegarLoop]: === Iteration 136 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:02:04,228 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:02:04,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1540653382, now seen corresponding path program 135 times [2018-09-26 22:02:04,228 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:02:04,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:02:04,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:02:04,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:02:04,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:02:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:02:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:02:05,876 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:02:05,876 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:02:05,883 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-26 22:02:06,035 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2018-09-26 22:02:06,035 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:02:06,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:02:06,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 0 proven. 9180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:02:06,739 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:02:06,739 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137] total 138 [2018-09-26 22:02:06,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-09-26 22:02:06,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-09-26 22:02:06,742 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:02:06,742 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 139 states. [2018-09-26 22:02:08,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:02:08,347 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2018-09-26 22:02:08,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-09-26 22:02:08,347 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 138 [2018-09-26 22:02:08,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:02:08,347 INFO L225 Difference]: With dead ends: 142 [2018-09-26 22:02:08,347 INFO L226 Difference]: Without dead ends: 140 [2018-09-26 22:02:08,348 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:02:08,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2018-09-26 22:02:08,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2018-09-26 22:02:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-09-26 22:02:08,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2018-09-26 22:02:08,350 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 138 [2018-09-26 22:02:08,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:02:08,351 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2018-09-26 22:02:08,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-09-26 22:02:08,351 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2018-09-26 22:02:08,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2018-09-26 22:02:08,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:02:08,352 INFO L375 BasicCegarLoop]: trace histogram [136, 1, 1, 1] [2018-09-26 22:02:08,352 INFO L423 AbstractCegarLoop]: === Iteration 137 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:02:08,352 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:02:08,352 INFO L82 PathProgramCache]: Analyzing trace with hash 515610720, now seen corresponding path program 136 times [2018-09-26 22:02:08,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:02:08,352 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:02:08,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:02:08,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:02:08,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:02:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-26 22:02:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:02:10,020 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-26 22:02:10,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-26 22:02:10,027 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-26 22:02:10,116 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-26 22:02:10,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-26 22:02:10,122 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-26 22:02:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9316 backedges. 0 proven. 9316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-26 22:02:10,874 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-26 22:02:10,874 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 138] total 139 [2018-09-26 22:02:10,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-26 22:02:10,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-26 22:02:10,877 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-26 22:02:10,877 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 140 states. [2018-09-26 22:02:12,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-26 22:02:12,330 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-26 22:02:12,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-09-26 22:02:12,330 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 139 [2018-09-26 22:02:12,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-26 22:02:12,331 INFO L225 Difference]: With dead ends: 143 [2018-09-26 22:02:12,331 INFO L226 Difference]: Without dead ends: 141 [2018-09-26 22:02:12,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-26 22:02:12,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-26 22:02:12,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-26 22:02:12,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-26 22:02:12,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-26 22:02:12,333 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 139 [2018-09-26 22:02:12,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-26 22:02:12,333 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-26 22:02:12,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-26 22:02:12,334 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-26 22:02:12,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-26 22:02:12,334 INFO L367 BasicCegarLoop]: Found error trace [2018-09-26 22:02:12,334 INFO L375 BasicCegarLoop]: trace histogram [137, 1, 1, 1] [2018-09-26 22:02:12,334 INFO L423 AbstractCegarLoop]: === Iteration 138 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-09-26 22:02:12,334 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-26 22:02:12,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1195940730, now seen corresponding path program 137 times [2018-09-26 22:02:12,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-26 22:02:12,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-26 22:02:12,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:02:12,335 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-26 22:02:12,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-26 22:02:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-26 22:02:13,818 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-26 22:02:13,824 WARN L206 ceAbstractionStarter]: Timeout [2018-09-26 22:02:13,824 INFO L202 PluginConnector]: Adding new model LuxembourgOctopus.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.09 10:02:13 BoogieIcfgContainer [2018-09-26 22:02:13,824 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-26 22:02:13,825 INFO L168 Benchmark]: Toolchain (without parser) took 247475.16 ms. Allocated memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: 483.9 MB). Free memory was 1.5 GB in the beginning and 1.3 GB in the end (delta: 183.2 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-09-26 22:02:13,827 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.23 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. [2018-09-26 22:02:13,827 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.92 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. [2018-09-26 22:02:13,828 INFO L168 Benchmark]: Boogie Preprocessor took 23.10 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. [2018-09-26 22:02:13,828 INFO L168 Benchmark]: RCFGBuilder took 299.32 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. [2018-09-26 22:02:13,829 INFO L168 Benchmark]: TraceAbstraction took 247100.95 ms. Allocated memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: 483.9 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 162.0 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. [2018-09-26 22:02:13,831 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 0.23 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 42.92 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. * Boogie Preprocessor took 23.10 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 299.32 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 247100.95 ms. Allocated memory was 1.5 GB in the beginning and 2.0 GB in the end (delta: 483.9 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 162.0 MB). Peak memory consumption was 1.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 25]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 25). Cancelled while BasicCegarLoop was analyzing trace of length 141 with TraceHistMax 137, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 139 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 247.0s OverallTime, 138 OverallIterations, 137 TraceHistogramMax, 84.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 413 SDtfs, 2 SDslu, 5618 SDs, 0 SdLazy, 15267 SolverSat, 234 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19178 GetRequests, 9589 SyntacticMatches, 0 SemanticMatches, 9589 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=141occurred in iteration=137, 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, 137 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.9s SsaConstructionTime, 9.5s SatisfiabilityAnalysisTime, 142.1s InterpolantComputationTime, 19451 NumberOfCodeBlocks, 19451 NumberOfCodeBlocksAsserted, 2642 NumberOfCheckSat, 19178 ConstructedInterpolants, 0 QuantifiedInterpolants, 8740592 SizeOfPredicates, 272 NumberOfNonLiveVariables, 38488 ConjunctsInSsa, 9588 ConjunctsInUnsatCore, 273 InterpolantComputations, 1 PerfectInterpolantSequences, 0/857072 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_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-26_22-02-13-840.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/LuxembourgOctopus.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-26_22-02-13-840.csv Completed graceful shutdown