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/Luxembourg.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-133090d [2018-10-04 09:51:11,151 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 09:51:11,153 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 09:51:11,168 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 09:51:11,169 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 09:51:11,170 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 09:51:11,171 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 09:51:11,173 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 09:51:11,174 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 09:51:11,175 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 09:51:11,176 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 09:51:11,176 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 09:51:11,177 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 09:51:11,178 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 09:51:11,179 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 09:51:11,180 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 09:51:11,181 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 09:51:11,183 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 09:51:11,185 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 09:51:11,186 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 09:51:11,188 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 09:51:11,189 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 09:51:11,191 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-04 09:51:11,202 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 09:51:11,224 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 09:51:11,224 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 09:51:11,225 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 09:51:11,225 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 09:51:11,227 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 09:51:11,227 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 09:51:11,227 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 09:51:11,228 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 09:51:11,230 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 09:51:11,230 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 09:51:11,230 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 09:51:11,230 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 09:51:11,231 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 09:51:11,231 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 09:51:11,231 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 09:51:11,231 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 09:51:11,231 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 09:51:11,231 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 09:51:11,232 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 09:51:11,232 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 09:51:11,232 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 09:51:11,232 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 09:51:11,232 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:51:11,233 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 09:51:11,234 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 09:51:11,234 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 09:51:11,234 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 09:51:11,234 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 09:51:11,234 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 09:51:11,235 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 09:51:11,235 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 09:51:11,288 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 09:51:11,303 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 09:51:11,306 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 09:51:11,307 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 09:51:11,308 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 09:51:11,308 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg.bpl [2018-10-04 09:51:11,309 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/Luxembourg.bpl' [2018-10-04 09:51:11,352 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 09:51:11,353 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 09:51:11,354 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 09:51:11,354 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 09:51:11,354 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 09:51:11,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:51:11" (1/1) ... [2018-10-04 09:51:11,387 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:51:11" (1/1) ... [2018-10-04 09:51:11,392 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 09:51:11,393 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 09:51:11,393 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 09:51:11,395 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 09:51:11,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 09:51:11,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 09:51:11,397 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 09:51:11,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:51:11" (1/1) ... [2018-10-04 09:51:11,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:51:11" (1/1) ... [2018-10-04 09:51:11,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:51:11" (1/1) ... [2018-10-04 09:51:11,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:51:11" (1/1) ... [2018-10-04 09:51:11,412 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:51:11" (1/1) ... [2018-10-04 09:51:11,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:51:11" (1/1) ... [2018-10-04 09:51:11,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:51:11" (1/1) ... [2018-10-04 09:51:11,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 09:51:11,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 09:51:11,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 09:51:11,420 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 09:51:11,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:51:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 09:51:11,489 INFO L124 BoogieDeclarations]: Specification and implementation of procedure main given in one single declaration [2018-10-04 09:51:11,489 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-04 09:51:11,490 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-04 09:51:11,720 INFO L338 CfgBuilder]: Using library mode [2018-10-04 09:51:11,720 INFO L202 PluginConnector]: Adding new model Luxembourg.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:51:11 BoogieIcfgContainer [2018-10-04 09:51:11,721 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 09:51:11,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 09:51:11,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 09:51:11,725 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 09:51:11,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 09:51:11" (1/2) ... [2018-10-04 09:51:11,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17267eeb and model type Luxembourg.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 09:51:11, skipping insertion in model container [2018-10-04 09:51:11,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Luxembourg.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 09:51:11" (2/2) ... [2018-10-04 09:51:11,732 INFO L112 eAbstractionObserver]: Analyzing ICFG Luxembourg.bpl [2018-10-04 09:51:11,742 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 09:51:11,749 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 09:51:11,792 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 09:51:11,793 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 09:51:11,794 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 09:51:11,794 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 09:51:11,794 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 09:51:11,794 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 09:51:11,794 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 09:51:11,795 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 09:51:11,795 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 09:51:11,810 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-04 09:51:11,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-04 09:51:11,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:11,817 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-04 09:51:11,818 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:11,825 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:11,825 INFO L82 PathProgramCache]: Analyzing trace with hash 30048, now seen corresponding path program 1 times [2018-10-04 09:51:11,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:11,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:11,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:11,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:11,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:11,962 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 09:51:11,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 09:51:11,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 09:51:11,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 09:51:11,980 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:11,982 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-04 09:51:12,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:12,048 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-10-04 09:51:12,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 09:51:12,050 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-04 09:51:12,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:12,062 INFO L225 Difference]: With dead ends: 13 [2018-10-04 09:51:12,062 INFO L226 Difference]: Without dead ends: 5 [2018-10-04 09:51:12,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 09:51:12,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-04 09:51:12,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-04 09:51:12,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-04 09:51:12,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-04 09:51:12,101 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-04 09:51:12,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:12,101 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-04 09:51:12,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 09:51:12,101 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-04 09:51:12,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 09:51:12,102 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:12,102 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 09:51:12,102 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:12,103 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:12,103 INFO L82 PathProgramCache]: Analyzing trace with hash 927622, now seen corresponding path program 1 times [2018-10-04 09:51:12,103 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:12,103 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:12,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:12,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:12,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:12,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:12,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:12,262 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:12,280 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:12,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:12,298 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:12,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:12,413 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 09:51:12,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 09:51:12,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 09:51:12,415 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:12,415 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-10-04 09:51:12,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:12,474 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-04 09:51:12,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 09:51:12,475 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-10-04 09:51:12,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:12,476 INFO L225 Difference]: With dead ends: 8 [2018-10-04 09:51:12,476 INFO L226 Difference]: Without dead ends: 6 [2018-10-04 09:51:12,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 2 [2018-10-04 09:51:12,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-04 09:51:12,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-04 09:51:12,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-04 09:51:12,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-04 09:51:12,479 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-04 09:51:12,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:12,480 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-04 09:51:12,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 09:51:12,480 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-04 09:51:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 09:51:12,480 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:12,481 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-04 09:51:12,481 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:12,481 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:12,481 INFO L82 PathProgramCache]: Analyzing trace with hash 28752416, now seen corresponding path program 2 times [2018-10-04 09:51:12,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:12,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:12,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:12,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:12,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:12,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:12,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:12,573 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:12,585 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:51:12,603 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:51:12,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:12,605 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:12,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:12,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 09:51:12,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 09:51:12,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 09:51:12,657 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:12,657 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-10-04 09:51:12,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:12,681 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 09:51:12,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 09:51:12,682 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-10-04 09:51:12,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:12,683 INFO L225 Difference]: With dead ends: 9 [2018-10-04 09:51:12,683 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 09:51:12,683 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 3 [2018-10-04 09:51:12,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 09:51:12,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 09:51:12,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 09:51:12,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 09:51:12,686 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-04 09:51:12,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:12,687 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 09:51:12,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 09:51:12,687 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 09:51:12,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 09:51:12,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:12,688 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-10-04 09:51:12,688 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:12,688 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:12,689 INFO L82 PathProgramCache]: Analyzing trace with hash 891321030, now seen corresponding path program 3 times [2018-10-04 09:51:12,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:12,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:12,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:12,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:12,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:12,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:12,789 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:12,789 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:12,797 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:51:12,804 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 09:51:12,804 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:12,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:12,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:12,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:12,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 09:51:12,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 09:51:12,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 09:51:12,904 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:12,904 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-10-04 09:51:12,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:12,922 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-04 09:51:12,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 09:51:12,923 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-10-04 09:51:12,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:12,923 INFO L225 Difference]: With dead ends: 10 [2018-10-04 09:51:12,923 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 09:51:12,924 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 4 [2018-10-04 09:51:12,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 09:51:12,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 09:51:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 09:51:12,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-04 09:51:12,927 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-04 09:51:12,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:12,927 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-04 09:51:12,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 09:51:12,927 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-04 09:51:12,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 09:51:12,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:12,928 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-10-04 09:51:12,928 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:12,928 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:12,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1861144288, now seen corresponding path program 4 times [2018-10-04 09:51:12,929 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:12,929 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:12,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:12,930 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:12,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:13,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:13,248 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:13,248 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:13,258 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:51:13,265 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:51:13,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:13,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:13,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:13,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 09:51:13,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 09:51:13,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 09:51:13,323 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:13,323 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-10-04 09:51:13,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:13,366 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 09:51:13,367 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 09:51:13,367 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-04 09:51:13,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:13,368 INFO L225 Difference]: With dead ends: 11 [2018-10-04 09:51:13,368 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 09:51:13,369 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 5 [2018-10-04 09:51:13,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 09:51:13,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 09:51:13,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 09:51:13,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 09:51:13,372 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-04 09:51:13,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:13,372 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 09:51:13,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 09:51:13,373 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 09:51:13,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 09:51:13,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:13,374 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-10-04 09:51:13,374 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:13,374 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:13,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894214, now seen corresponding path program 5 times [2018-10-04 09:51:13,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:13,375 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:13,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:13,376 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:13,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:13,493 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:13,493 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:13,505 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:51:13,575 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 09:51:13,575 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:13,577 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:13,654 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:13,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 09:51:13,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 09:51:13,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 09:51:13,655 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:13,656 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-10-04 09:51:13,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:13,684 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-04 09:51:13,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 09:51:13,685 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-04 09:51:13,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:13,685 INFO L225 Difference]: With dead ends: 12 [2018-10-04 09:51:13,686 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 09:51:13,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 6 [2018-10-04 09:51:13,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 09:51:13,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 09:51:13,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 09:51:13,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-04 09:51:13,689 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-04 09:51:13,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:13,689 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-04 09:51:13,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 09:51:13,690 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-04 09:51:13,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 09:51:13,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:13,690 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-10-04 09:51:13,691 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:13,691 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:13,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1853141920, now seen corresponding path program 6 times [2018-10-04 09:51:13,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:13,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:13,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:13,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:13,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:13,813 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:13,814 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:13,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:13,824 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:51:13,833 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 09:51:13,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:13,835 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:13,912 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:13,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 09:51:13,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 09:51:13,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 09:51:13,913 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:13,913 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-10-04 09:51:13,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:13,944 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 09:51:13,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 09:51:13,944 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-10-04 09:51:13,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:13,945 INFO L225 Difference]: With dead ends: 13 [2018-10-04 09:51:13,945 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 09:51:13,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 7 [2018-10-04 09:51:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 09:51:13,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 09:51:13,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 09:51:13,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 09:51:13,948 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-04 09:51:13,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:13,949 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 09:51:13,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 09:51:13,949 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 09:51:13,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 09:51:13,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:13,950 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-10-04 09:51:13,950 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:13,950 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:13,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1612820806, now seen corresponding path program 7 times [2018-10-04 09:51:13,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:13,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:13,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:13,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:13,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:14,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:14,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:14,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:14,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:14,555 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:14,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 09:51:14,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 09:51:14,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 09:51:14,556 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:14,557 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-10-04 09:51:14,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:14,616 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-04 09:51:14,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 09:51:14,616 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-04 09:51:14,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:14,617 INFO L225 Difference]: With dead ends: 14 [2018-10-04 09:51:14,617 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 09:51:14,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 8 [2018-10-04 09:51:14,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 09:51:14,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 09:51:14,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 09:51:14,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-04 09:51:14,621 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-04 09:51:14,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:14,621 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-04 09:51:14,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 09:51:14,621 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-04 09:51:14,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 09:51:14,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:14,622 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-10-04 09:51:14,622 INFO L423 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:14,622 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:14,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1542166432, now seen corresponding path program 8 times [2018-10-04 09:51:14,623 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:14,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:14,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:14,624 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:14,624 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:14,776 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:14,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:14,787 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:51:14,798 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:51:14,798 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:14,799 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:14,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:14,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 09:51:14,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 09:51:14,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 09:51:14,878 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:14,878 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-10-04 09:51:14,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:14,921 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 09:51:14,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 09:51:14,921 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-10-04 09:51:14,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:14,922 INFO L225 Difference]: With dead ends: 15 [2018-10-04 09:51:14,922 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 09:51:14,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 9 [2018-10-04 09:51:14,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 09:51:14,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 09:51:14,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 09:51:14,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 09:51:14,925 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-04 09:51:14,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:14,926 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 09:51:14,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 09:51:14,926 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 09:51:14,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 09:51:14,927 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:14,927 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-10-04 09:51:14,927 INFO L423 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:14,927 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:14,927 INFO L82 PathProgramCache]: Analyzing trace with hash -562523002, now seen corresponding path program 9 times [2018-10-04 09:51:14,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:14,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:14,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:14,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:14,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:15,064 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:15,064 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:15,074 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:51:15,094 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 09:51:15,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:15,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:15,181 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:15,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 09:51:15,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 09:51:15,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 09:51:15,182 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:15,182 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-10-04 09:51:15,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:15,207 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-04 09:51:15,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 09:51:15,208 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-10-04 09:51:15,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:15,209 INFO L225 Difference]: With dead ends: 16 [2018-10-04 09:51:15,209 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 09:51:15,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 10 [2018-10-04 09:51:15,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 09:51:15,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 09:51:15,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 09:51:15,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-04 09:51:15,214 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-04 09:51:15,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:15,214 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-04 09:51:15,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 09:51:15,215 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-04 09:51:15,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 09:51:15,215 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:15,215 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-10-04 09:51:15,215 INFO L423 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:15,216 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:15,216 INFO L82 PathProgramCache]: Analyzing trace with hash -258347744, now seen corresponding path program 10 times [2018-10-04 09:51:15,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:15,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:15,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:15,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:15,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:15,449 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:15,449 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:15,456 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:51:15,467 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:51:15,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:15,468 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:15,537 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:15,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 09:51:15,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 09:51:15,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 09:51:15,538 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:15,538 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-10-04 09:51:15,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:15,615 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 09:51:15,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 09:51:15,616 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-10-04 09:51:15,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:15,616 INFO L225 Difference]: With dead ends: 17 [2018-10-04 09:51:15,616 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 09:51:15,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 11 [2018-10-04 09:51:15,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 09:51:15,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 09:51:15,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 09:51:15,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 09:51:15,620 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-04 09:51:15,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:15,620 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 09:51:15,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 09:51:15,620 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 09:51:15,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 09:51:15,621 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:15,621 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-10-04 09:51:15,621 INFO L423 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:15,621 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:15,621 INFO L82 PathProgramCache]: Analyzing trace with hash 581150662, now seen corresponding path program 11 times [2018-10-04 09:51:15,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:15,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:15,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:15,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:15,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:15,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:15,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:15,948 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:51:15,960 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 09:51:15,960 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:15,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:16,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:16,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 09:51:16,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 09:51:16,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 09:51:16,022 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:16,023 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-10-04 09:51:16,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:16,075 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-04 09:51:16,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 09:51:16,076 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-04 09:51:16,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:16,076 INFO L225 Difference]: With dead ends: 18 [2018-10-04 09:51:16,076 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 09:51:16,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 12 [2018-10-04 09:51:16,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 09:51:16,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 09:51:16,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 09:51:16,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-04 09:51:16,079 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-04 09:51:16,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:16,080 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-04 09:51:16,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 09:51:16,080 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-04 09:51:16,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 09:51:16,081 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:16,081 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-10-04 09:51:16,081 INFO L423 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:16,081 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:16,081 INFO L82 PathProgramCache]: Analyzing trace with hash 835797472, now seen corresponding path program 12 times [2018-10-04 09:51:16,081 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:16,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:16,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:16,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:16,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:16,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:16,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:16,361 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:51:16,376 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 09:51:16,376 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:16,378 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:16,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:16,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 09:51:16,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 09:51:16,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 09:51:16,442 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:16,443 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-10-04 09:51:16,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:16,481 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 09:51:16,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 09:51:16,482 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-10-04 09:51:16,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:16,482 INFO L225 Difference]: With dead ends: 19 [2018-10-04 09:51:16,483 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 09:51:16,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 13 [2018-10-04 09:51:16,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 09:51:16,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 09:51:16,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 09:51:16,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 09:51:16,488 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-04 09:51:16,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:16,489 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 09:51:16,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 09:51:16,489 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 09:51:16,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 09:51:16,490 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:16,490 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-10-04 09:51:16,490 INFO L423 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:16,490 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:16,490 INFO L82 PathProgramCache]: Analyzing trace with hash 139913990, now seen corresponding path program 13 times [2018-10-04 09:51:16,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:16,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:16,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:16,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:16,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:16,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:16,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:16,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:16,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:16,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:16,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 09:51:16,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 09:51:16,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 09:51:16,806 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:16,806 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-10-04 09:51:16,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:16,981 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-04 09:51:16,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 09:51:16,984 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-10-04 09:51:16,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:16,985 INFO L225 Difference]: With dead ends: 20 [2018-10-04 09:51:16,985 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 09:51:16,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 14 [2018-10-04 09:51:16,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 09:51:16,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 09:51:16,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 09:51:16,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-04 09:51:16,989 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-04 09:51:16,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:16,989 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-04 09:51:16,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 09:51:16,989 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-04 09:51:16,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 09:51:16,990 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:16,990 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-10-04 09:51:16,990 INFO L423 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:16,990 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:16,991 INFO L82 PathProgramCache]: Analyzing trace with hash 42362528, now seen corresponding path program 14 times [2018-10-04 09:51:16,991 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:16,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:16,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:16,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:16,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:17,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:17,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:17,272 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:51:17,300 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:51:17,300 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:17,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:17,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:17,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 09:51:17,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 09:51:17,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 09:51:17,380 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:17,380 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-04 09:51:17,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:17,423 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 09:51:17,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 09:51:17,424 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-04 09:51:17,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:17,425 INFO L225 Difference]: With dead ends: 21 [2018-10-04 09:51:17,425 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 09:51:17,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 15 [2018-10-04 09:51:17,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 09:51:17,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 09:51:17,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 09:51:17,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 09:51:17,429 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-04 09:51:17,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:17,430 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 09:51:17,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 09:51:17,430 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 09:51:17,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 09:51:17,431 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:17,431 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-10-04 09:51:17,431 INFO L423 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:17,431 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:17,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1313234502, now seen corresponding path program 15 times [2018-10-04 09:51:17,432 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:17,432 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:17,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:17,433 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:17,433 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:17,703 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:17,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:17,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:17,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:51:17,735 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 09:51:17,736 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:17,738 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:17,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:17,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 09:51:17,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 09:51:17,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 09:51:17,824 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:17,824 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-04 09:51:17,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:17,854 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-04 09:51:17,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 09:51:17,856 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-04 09:51:17,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:17,857 INFO L225 Difference]: With dead ends: 22 [2018-10-04 09:51:17,857 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 09:51:17,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 16 [2018-10-04 09:51:17,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 09:51:17,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 09:51:17,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 09:51:17,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-04 09:51:17,861 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-04 09:51:17,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:17,861 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-04 09:51:17,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 09:51:17,861 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-04 09:51:17,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 09:51:17,862 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:17,862 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-10-04 09:51:17,862 INFO L423 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:17,862 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:17,863 INFO L82 PathProgramCache]: Analyzing trace with hash 2055560032, now seen corresponding path program 16 times [2018-10-04 09:51:17,863 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:17,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:17,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:17,864 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:17,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:18,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:18,262 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:18,269 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:51:18,299 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:51:18,299 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:18,301 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:18,514 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:18,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 09:51:18,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 09:51:18,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 09:51:18,514 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:18,515 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-10-04 09:51:18,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:18,589 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 09:51:18,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 09:51:18,590 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-10-04 09:51:18,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:18,590 INFO L225 Difference]: With dead ends: 23 [2018-10-04 09:51:18,590 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 09:51:18,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 17 [2018-10-04 09:51:18,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 09:51:18,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 09:51:18,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 09:51:18,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 09:51:18,593 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-04 09:51:18,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:18,594 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 09:51:18,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 09:51:18,594 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 09:51:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 09:51:18,595 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:18,595 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-10-04 09:51:18,595 INFO L423 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:18,595 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:18,595 INFO L82 PathProgramCache]: Analyzing trace with hash -702152314, now seen corresponding path program 17 times [2018-10-04 09:51:18,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:18,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:18,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:18,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:18,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:18,898 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:18,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:18,906 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:51:18,932 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 09:51:18,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:18,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:19,034 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:19,034 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 09:51:19,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 09:51:19,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 09:51:19,035 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:19,035 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-10-04 09:51:19,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:19,085 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-04 09:51:19,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 09:51:19,085 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-10-04 09:51:19,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:19,086 INFO L225 Difference]: With dead ends: 24 [2018-10-04 09:51:19,086 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 09:51:19,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 18 [2018-10-04 09:51:19,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 09:51:19,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 09:51:19,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 09:51:19,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-04 09:51:19,091 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-04 09:51:19,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:19,091 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-04 09:51:19,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 09:51:19,092 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-04 09:51:19,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 09:51:19,092 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:19,093 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-10-04 09:51:19,093 INFO L423 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:19,093 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:19,093 INFO L82 PathProgramCache]: Analyzing trace with hash -291889120, now seen corresponding path program 18 times [2018-10-04 09:51:19,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:19,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:19,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:19,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:19,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:19,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:19,304 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:19,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:19,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:19,316 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:51:19,334 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 09:51:19,334 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:19,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:19,602 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:19,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:19,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 09:51:19,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 09:51:19,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 09:51:19,634 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:19,634 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-10-04 09:51:19,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:19,750 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 09:51:19,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 09:51:19,751 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-10-04 09:51:19,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:19,752 INFO L225 Difference]: With dead ends: 25 [2018-10-04 09:51:19,752 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 09:51:19,752 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 6 [2018-10-04 09:51:19,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 09:51:19,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 09:51:19,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 09:51:19,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 09:51:19,756 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-04 09:51:19,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:19,757 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 09:51:19,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 09:51:19,757 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 09:51:19,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 09:51:19,757 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:19,758 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-10-04 09:51:19,758 INFO L423 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:19,758 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:19,758 INFO L82 PathProgramCache]: Analyzing trace with hash -458631994, now seen corresponding path program 19 times [2018-10-04 09:51:19,758 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:19,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:19,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:19,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:19,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:20,043 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:20,064 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:20,065 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:20,065 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:20,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:20,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:20,195 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:20,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 09:51:20,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 09:51:20,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 09:51:20,196 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:20,196 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-10-04 09:51:20,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:20,297 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-04 09:51:20,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 09:51:20,298 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-04 09:51:20,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:20,299 INFO L225 Difference]: With dead ends: 26 [2018-10-04 09:51:20,299 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 09:51:20,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 7 [2018-10-04 09:51:20,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 09:51:20,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 09:51:20,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 09:51:20,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-04 09:51:20,303 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-04 09:51:20,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:20,303 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-04 09:51:20,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 09:51:20,303 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-04 09:51:20,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 09:51:20,304 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:20,304 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-10-04 09:51:20,304 INFO L423 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:20,304 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:20,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1332693792, now seen corresponding path program 20 times [2018-10-04 09:51:20,305 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:20,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:20,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:20,306 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:20,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:20,596 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:20,635 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:20,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:20,642 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:51:20,674 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:51:20,674 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:20,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:20,991 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:20,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 09:51:20,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 09:51:20,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 09:51:20,992 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:20,993 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-10-04 09:51:21,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:21,027 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 09:51:21,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 09:51:21,032 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-10-04 09:51:21,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:21,033 INFO L225 Difference]: With dead ends: 27 [2018-10-04 09:51:21,033 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 09:51:21,033 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 8 [2018-10-04 09:51:21,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 09:51:21,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 09:51:21,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 09:51:21,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 09:51:21,036 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-04 09:51:21,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:21,036 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 09:51:21,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 09:51:21,037 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 09:51:21,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 09:51:21,037 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:21,037 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-10-04 09:51:21,038 INFO L423 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:21,038 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:21,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1636161542, now seen corresponding path program 21 times [2018-10-04 09:51:21,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:21,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:21,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:21,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:21,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:21,357 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:21,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:21,417 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:21,426 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:51:21,442 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 09:51:21,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:21,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:21,491 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:21,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:21,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 09:51:21,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 09:51:21,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 09:51:21,513 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:21,513 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-10-04 09:51:21,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:21,553 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-04 09:51:21,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 09:51:21,554 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-10-04 09:51:21,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:21,555 INFO L225 Difference]: With dead ends: 28 [2018-10-04 09:51:21,555 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 09:51:21,556 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 9 [2018-10-04 09:51:21,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 09:51:21,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 09:51:21,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 09:51:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-04 09:51:21,559 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-04 09:51:21,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:21,560 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-04 09:51:21,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 09:51:21,560 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-04 09:51:21,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 09:51:21,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:21,561 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-10-04 09:51:21,561 INFO L423 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:21,561 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:21,561 INFO L82 PathProgramCache]: Analyzing trace with hash -818603616, now seen corresponding path program 22 times [2018-10-04 09:51:21,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:21,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:21,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:21,562 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:21,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:21,882 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:21,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:21,932 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:21,940 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:51:21,954 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:51:21,954 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:21,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:22,100 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:22,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 09:51:22,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 09:51:22,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 09:51:22,101 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:22,101 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-10-04 09:51:22,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:22,434 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 09:51:22,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 09:51:22,434 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-10-04 09:51:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:22,435 INFO L225 Difference]: With dead ends: 29 [2018-10-04 09:51:22,435 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 09:51:22,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 10 [2018-10-04 09:51:22,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 09:51:22,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 09:51:22,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 09:51:22,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 09:51:22,440 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-04 09:51:22,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:22,440 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 09:51:22,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 09:51:22,440 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 09:51:22,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 09:51:22,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:22,441 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-10-04 09:51:22,442 INFO L423 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:22,442 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:22,442 INFO L82 PathProgramCache]: Analyzing trace with hash 393087814, now seen corresponding path program 23 times [2018-10-04 09:51:22,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:22,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:22,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:22,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:22,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:22,792 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:22,821 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:22,821 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:22,829 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:51:22,848 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 09:51:22,848 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:22,850 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:22,931 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:22,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:22,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 09:51:22,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 09:51:22,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 09:51:22,952 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:22,952 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-10-04 09:51:22,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:22,981 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-04 09:51:22,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 09:51:22,989 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-04 09:51:22,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:22,989 INFO L225 Difference]: With dead ends: 30 [2018-10-04 09:51:22,989 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 09:51:22,989 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 11 [2018-10-04 09:51:22,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 09:51:22,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 09:51:22,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 09:51:22,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-04 09:51:22,993 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-04 09:51:22,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:22,993 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-04 09:51:22,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 09:51:22,993 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-04 09:51:22,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 09:51:22,994 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:22,994 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-10-04 09:51:22,994 INFO L423 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:22,994 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:22,995 INFO L82 PathProgramCache]: Analyzing trace with hash -699183520, now seen corresponding path program 24 times [2018-10-04 09:51:22,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:22,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:22,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:22,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:22,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:23,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:23,221 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:23,276 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:23,276 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:23,286 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:51:23,308 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 09:51:23,308 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:23,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:23,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:23,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 09:51:23,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 09:51:23,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 09:51:23,479 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:23,480 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-10-04 09:51:23,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:23,537 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 09:51:23,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 09:51:23,538 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-10-04 09:51:23,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:23,538 INFO L225 Difference]: With dead ends: 31 [2018-10-04 09:51:23,538 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 09:51:23,539 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 12 [2018-10-04 09:51:23,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 09:51:23,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 09:51:23,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 09:51:23,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 09:51:23,543 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-04 09:51:23,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:23,544 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 09:51:23,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 09:51:23,544 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 09:51:23,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 09:51:23,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:23,545 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-10-04 09:51:23,545 INFO L423 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:23,545 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:23,545 INFO L82 PathProgramCache]: Analyzing trace with hash -199856506, now seen corresponding path program 25 times [2018-10-04 09:51:23,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:23,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:23,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:23,546 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:23,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:23,777 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:23,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:23,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:23,914 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:23,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:24,129 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:24,129 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 09:51:24,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 09:51:24,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 09:51:24,130 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:24,130 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-10-04 09:51:24,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:24,177 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-04 09:51:24,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 09:51:24,178 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-10-04 09:51:24,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:24,178 INFO L225 Difference]: With dead ends: 32 [2018-10-04 09:51:24,179 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 09:51:24,179 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 13 [2018-10-04 09:51:24,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 09:51:24,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 09:51:24,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 09:51:24,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-04 09:51:24,183 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-04 09:51:24,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:24,184 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-04 09:51:24,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 09:51:24,184 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-04 09:51:24,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 09:51:24,185 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:24,185 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-10-04 09:51:24,185 INFO L423 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:24,185 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:24,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1900588256, now seen corresponding path program 26 times [2018-10-04 09:51:24,185 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:24,186 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:24,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:24,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:24,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:25,127 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:25,250 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:25,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:25,251 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:25,260 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:51:25,277 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:51:25,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:25,279 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:25,347 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:25,369 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:25,370 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 09:51:25,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 09:51:25,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 09:51:25,370 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:25,370 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-10-04 09:51:25,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:25,446 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 09:51:25,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 09:51:25,446 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-10-04 09:51:25,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:25,447 INFO L225 Difference]: With dead ends: 33 [2018-10-04 09:51:25,447 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 09:51:25,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.7s impTime 14 [2018-10-04 09:51:25,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 09:51:25,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 09:51:25,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 09:51:25,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 09:51:25,452 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-04 09:51:25,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:25,453 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 09:51:25,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 09:51:25,453 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 09:51:25,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 09:51:25,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:25,453 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-10-04 09:51:25,454 INFO L423 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:25,454 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:25,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1211302342, now seen corresponding path program 27 times [2018-10-04 09:51:25,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:25,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:25,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:25,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:25,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:25,650 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:25,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:25,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:25,754 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:51:25,799 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 09:51:25,799 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:25,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:25,923 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:25,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:25,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 09:51:25,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 09:51:25,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 09:51:25,944 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:25,945 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-10-04 09:51:25,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:25,989 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-04 09:51:25,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 09:51:25,990 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-04 09:51:25,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:25,991 INFO L225 Difference]: With dead ends: 34 [2018-10-04 09:51:25,991 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 09:51:25,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 15 [2018-10-04 09:51:25,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 09:51:25,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 09:51:25,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 09:51:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-04 09:51:25,995 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-04 09:51:25,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:25,996 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-04 09:51:25,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 09:51:25,996 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-04 09:51:25,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 09:51:25,996 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:25,997 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-10-04 09:51:25,997 INFO L423 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:25,997 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:25,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1104336928, now seen corresponding path program 28 times [2018-10-04 09:51:25,997 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:25,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:25,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:25,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:25,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:26,329 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:26,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:26,727 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:26,740 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:51:26,757 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:51:26,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:26,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:26,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:26,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 09:51:26,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 09:51:26,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 09:51:26,846 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:26,846 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-10-04 09:51:26,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:26,905 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 09:51:26,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 09:51:26,906 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-10-04 09:51:26,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:26,907 INFO L225 Difference]: With dead ends: 35 [2018-10-04 09:51:26,907 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 09:51:26,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 16 [2018-10-04 09:51:26,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 09:51:26,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 09:51:26,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 09:51:26,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 09:51:26,911 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-04 09:51:26,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:26,911 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 09:51:26,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 09:51:26,912 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 09:51:26,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 09:51:26,912 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:26,912 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-10-04 09:51:26,913 INFO L423 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:26,913 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:26,913 INFO L82 PathProgramCache]: Analyzing trace with hash 125289734, now seen corresponding path program 29 times [2018-10-04 09:51:26,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:26,913 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:26,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:26,914 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:26,914 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:27,187 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:27,399 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:27,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:27,400 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:27,407 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:51:27,433 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 09:51:27,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:27,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:27,526 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:27,526 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 09:51:27,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 09:51:27,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 09:51:27,527 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:27,527 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-10-04 09:51:27,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:27,574 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-04 09:51:27,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 09:51:27,574 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-10-04 09:51:27,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:27,575 INFO L225 Difference]: With dead ends: 36 [2018-10-04 09:51:27,575 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 09:51:27,575 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 17 [2018-10-04 09:51:27,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 09:51:27,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 09:51:27,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 09:51:27,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-04 09:51:27,578 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-04 09:51:27,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:27,578 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-04 09:51:27,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 09:51:27,579 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-04 09:51:27,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 09:51:27,579 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:27,579 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-10-04 09:51:27,579 INFO L423 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:27,579 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:27,579 INFO L82 PathProgramCache]: Analyzing trace with hash -410989408, now seen corresponding path program 30 times [2018-10-04 09:51:27,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:27,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:27,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:27,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:27,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:27,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:27,837 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:28,058 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:28,059 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:28,067 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:51:28,090 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 09:51:28,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:28,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:28,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:28,232 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 09:51:28,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 09:51:28,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 09:51:28,233 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:28,233 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-10-04 09:51:28,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:28,283 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 09:51:28,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 09:51:28,283 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-10-04 09:51:28,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:28,284 INFO L225 Difference]: With dead ends: 37 [2018-10-04 09:51:28,284 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 09:51:28,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 18 [2018-10-04 09:51:28,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 09:51:28,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 09:51:28,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 09:51:28,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 09:51:28,288 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-04 09:51:28,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:28,288 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 09:51:28,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 09:51:28,288 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 09:51:28,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 09:51:28,289 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:28,289 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-10-04 09:51:28,289 INFO L423 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:28,289 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:28,290 INFO L82 PathProgramCache]: Analyzing trace with hash 144226374, now seen corresponding path program 31 times [2018-10-04 09:51:28,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:28,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:28,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:28,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:28,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:28,541 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:28,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:28,858 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:28,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:28,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:28,885 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:28,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:28,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 09:51:28,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 09:51:28,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 09:51:28,962 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:28,962 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-10-04 09:51:29,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:29,023 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-04 09:51:29,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 09:51:29,024 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-04 09:51:29,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:29,024 INFO L225 Difference]: With dead ends: 38 [2018-10-04 09:51:29,024 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 09:51:29,025 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime 19 [2018-10-04 09:51:29,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 09:51:29,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 09:51:29,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 09:51:29,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-04 09:51:29,029 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-04 09:51:29,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:29,029 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-04 09:51:29,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 09:51:29,030 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-04 09:51:29,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 09:51:29,030 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:29,030 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-10-04 09:51:29,031 INFO L423 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:29,031 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:29,031 INFO L82 PathProgramCache]: Analyzing trace with hash 176046432, now seen corresponding path program 32 times [2018-10-04 09:51:29,031 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:29,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:29,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:29,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:29,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:29,372 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:29,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:29,575 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:29,595 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:51:29,619 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:51:29,619 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:29,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:29,712 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:29,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 09:51:29,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 09:51:29,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 09:51:29,713 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:29,714 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-10-04 09:51:29,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:29,757 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 09:51:29,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 09:51:29,758 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-10-04 09:51:29,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:29,759 INFO L225 Difference]: With dead ends: 39 [2018-10-04 09:51:29,759 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 09:51:29,759 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 20 [2018-10-04 09:51:29,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 09:51:29,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 09:51:29,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 09:51:29,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 09:51:29,763 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-04 09:51:29,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:29,763 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 09:51:29,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 09:51:29,763 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 09:51:29,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 09:51:29,764 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:29,764 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-10-04 09:51:29,764 INFO L423 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:29,764 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:29,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1162468230, now seen corresponding path program 33 times [2018-10-04 09:51:29,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:29,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:29,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:29,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:29,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:30,038 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:30,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:30,389 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:30,403 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:51:30,430 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 09:51:30,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:30,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:30,540 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:30,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:30,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 09:51:30,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 09:51:30,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 09:51:30,561 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:30,561 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-10-04 09:51:30,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:30,612 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-04 09:51:30,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 09:51:30,612 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-10-04 09:51:30,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:30,613 INFO L225 Difference]: With dead ends: 40 [2018-10-04 09:51:30,613 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 09:51:30,613 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 21 [2018-10-04 09:51:30,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 09:51:30,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 09:51:30,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 09:51:30,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-04 09:51:30,616 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-04 09:51:30,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:30,617 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-04 09:51:30,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 09:51:30,617 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-04 09:51:30,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 09:51:30,618 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:30,618 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-10-04 09:51:30,618 INFO L423 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:30,618 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:30,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1676772896, now seen corresponding path program 34 times [2018-10-04 09:51:30,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:30,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:30,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:30,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:30,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:30,887 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:31,198 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:31,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:31,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:31,209 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:51:31,248 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:51:31,248 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:31,250 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:31,350 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:31,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:31,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 09:51:31,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 09:51:31,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 09:51:31,374 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:31,374 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-10-04 09:51:31,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:31,442 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 09:51:31,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 09:51:31,443 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-10-04 09:51:31,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:31,443 INFO L225 Difference]: With dead ends: 41 [2018-10-04 09:51:31,443 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 09:51:31,443 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 7 [2018-10-04 09:51:31,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 09:51:31,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 09:51:31,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 09:51:31,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 09:51:31,446 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-04 09:51:31,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:31,446 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 09:51:31,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 09:51:31,446 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 09:51:31,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 09:51:31,447 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:31,447 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-10-04 09:51:31,447 INFO L423 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:31,447 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:31,447 INFO L82 PathProgramCache]: Analyzing trace with hash 440348358, now seen corresponding path program 35 times [2018-10-04 09:51:31,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:31,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:31,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:31,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:31,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:31,846 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:32,231 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:32,264 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:32,264 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:32,271 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:51:32,297 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 09:51:32,297 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:32,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:32,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:32,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 09:51:32,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 09:51:32,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 09:51:32,422 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:32,422 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-10-04 09:51:32,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:32,499 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-04 09:51:32,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 09:51:32,499 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-04 09:51:32,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:32,500 INFO L225 Difference]: With dead ends: 42 [2018-10-04 09:51:32,500 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 09:51:32,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 8 [2018-10-04 09:51:32,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 09:51:32,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 09:51:32,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 09:51:32,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-04 09:51:32,503 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-04 09:51:32,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:32,504 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-04 09:51:32,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 09:51:32,504 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-04 09:51:32,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 09:51:32,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:32,504 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-10-04 09:51:32,505 INFO L423 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:32,505 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:32,505 INFO L82 PathProgramCache]: Analyzing trace with hash 765893344, now seen corresponding path program 36 times [2018-10-04 09:51:32,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:32,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:32,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:32,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:32,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:32,900 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:33,344 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:33,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:33,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:33,541 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:51:33,572 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 09:51:33,572 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:33,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:34,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:34,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 09:51:34,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 09:51:34,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 09:51:34,493 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:34,494 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-10-04 09:51:34,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:34,744 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 09:51:34,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 09:51:34,745 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-10-04 09:51:34,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:34,745 INFO L225 Difference]: With dead ends: 43 [2018-10-04 09:51:34,746 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 09:51:34,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 0.7s impTime 9 [2018-10-04 09:51:34,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 09:51:34,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 09:51:34,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 09:51:34,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 09:51:34,748 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-04 09:51:34,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:34,749 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 09:51:34,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 09:51:34,749 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 09:51:34,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 09:51:34,749 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:34,750 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-10-04 09:51:34,750 INFO L423 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:34,750 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:34,750 INFO L82 PathProgramCache]: Analyzing trace with hash -2027113978, now seen corresponding path program 37 times [2018-10-04 09:51:34,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:34,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:34,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:34,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:34,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:34,918 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:35,308 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:35,405 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:35,406 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:35,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:35,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:35,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:35,570 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:35,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 09:51:35,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 09:51:35,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 09:51:35,570 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:35,570 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-10-04 09:51:35,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:35,663 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-04 09:51:35,663 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 09:51:35,663 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-10-04 09:51:35,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:35,664 INFO L225 Difference]: With dead ends: 44 [2018-10-04 09:51:35,664 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 09:51:35,665 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.5s impTime 10 [2018-10-04 09:51:35,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 09:51:35,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 09:51:35,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 09:51:35,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-04 09:51:35,667 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-04 09:51:35,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:35,667 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-04 09:51:35,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 09:51:35,668 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-04 09:51:35,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 09:51:35,668 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:35,669 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-10-04 09:51:35,669 INFO L423 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:35,669 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:35,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1583972256, now seen corresponding path program 38 times [2018-10-04 09:51:35,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:35,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:35,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:35,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:35,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:36,118 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:36,361 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:36,415 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:36,415 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:36,423 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:51:36,449 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:51:36,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:36,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:36,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:36,581 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 09:51:36,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 09:51:36,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 09:51:36,582 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:36,582 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-10-04 09:51:36,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:36,709 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 09:51:36,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 09:51:36,710 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-10-04 09:51:36,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:36,710 INFO L225 Difference]: With dead ends: 45 [2018-10-04 09:51:36,710 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 09:51:36,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 11 [2018-10-04 09:51:36,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 09:51:36,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 09:51:36,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 09:51:36,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 09:51:36,714 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-04 09:51:36,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:36,714 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 09:51:36,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 09:51:36,714 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 09:51:36,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 09:51:36,715 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:36,715 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-10-04 09:51:36,715 INFO L423 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:36,716 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:36,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1858495814, now seen corresponding path program 39 times [2018-10-04 09:51:36,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:36,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:36,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:36,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:36,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:37,043 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:37,423 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:37,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:37,580 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:37,588 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:51:37,618 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 09:51:37,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:37,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:37,703 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:37,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 09:51:37,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 09:51:37,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 09:51:37,704 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:37,704 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-10-04 09:51:37,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:37,767 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-04 09:51:37,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 09:51:37,767 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-04 09:51:37,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:37,768 INFO L225 Difference]: With dead ends: 46 [2018-10-04 09:51:37,768 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 09:51:37,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.7s impTime 12 [2018-10-04 09:51:37,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 09:51:37,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 09:51:37,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 09:51:37,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-04 09:51:37,771 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-04 09:51:37,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:37,771 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-04 09:51:37,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 09:51:37,771 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-04 09:51:37,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 09:51:37,771 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:37,771 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-10-04 09:51:37,772 INFO L423 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:37,772 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:37,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1778791520, now seen corresponding path program 40 times [2018-10-04 09:51:37,772 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:37,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:37,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:37,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:37,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:38,035 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:38,847 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:39,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:39,056 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:39,063 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:51:39,089 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:51:39,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:39,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:39,204 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:39,204 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 09:51:39,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 09:51:39,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 09:51:39,205 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:39,205 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-10-04 09:51:39,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:39,275 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 09:51:39,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 09:51:39,275 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-10-04 09:51:39,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:39,276 INFO L225 Difference]: With dead ends: 47 [2018-10-04 09:51:39,276 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 09:51:39,276 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 13 [2018-10-04 09:51:39,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 09:51:39,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 09:51:39,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 09:51:39,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-04 09:51:39,279 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-04 09:51:39,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:39,279 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-04 09:51:39,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 09:51:39,279 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-04 09:51:39,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 09:51:39,279 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:39,279 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-10-04 09:51:39,279 INFO L423 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:39,280 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:39,280 INFO L82 PathProgramCache]: Analyzing trace with hash -692041594, now seen corresponding path program 41 times [2018-10-04 09:51:39,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:39,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:39,280 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:39,280 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:39,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:39,647 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:40,001 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:40,249 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:40,249 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:40,256 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:51:40,290 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 09:51:40,290 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:40,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:40,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:40,392 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 09:51:40,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 09:51:40,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 09:51:40,392 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:40,392 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-10-04 09:51:40,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:40,550 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-04 09:51:40,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 09:51:40,551 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-10-04 09:51:40,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:40,552 INFO L225 Difference]: With dead ends: 48 [2018-10-04 09:51:40,552 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 09:51:40,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 14 [2018-10-04 09:51:40,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 09:51:40,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 09:51:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 09:51:40,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-04 09:51:40,554 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-04 09:51:40,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:40,554 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-04 09:51:40,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 09:51:40,554 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-04 09:51:40,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 09:51:40,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:40,555 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-10-04 09:51:40,555 INFO L423 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:40,555 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:40,555 INFO L82 PathProgramCache]: Analyzing trace with hash 21543200, now seen corresponding path program 42 times [2018-10-04 09:51:40,555 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:40,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:40,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:40,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:40,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:40,914 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:41,312 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:41,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:41,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:41,589 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:51:41,633 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-04 09:51:41,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:41,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:41,795 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:41,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:41,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 09:51:41,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 09:51:41,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 09:51:41,816 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:41,816 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-10-04 09:51:41,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:41,931 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 09:51:41,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 09:51:41,932 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-10-04 09:51:41,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:41,932 INFO L225 Difference]: With dead ends: 49 [2018-10-04 09:51:41,932 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 09:51:41,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.8s impTime 15 [2018-10-04 09:51:41,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 09:51:41,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 09:51:41,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 09:51:41,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 09:51:41,934 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-04 09:51:41,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:41,934 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 09:51:41,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 09:51:41,935 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 09:51:41,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 09:51:41,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:41,935 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-10-04 09:51:41,935 INFO L423 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:41,935 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:41,935 INFO L82 PathProgramCache]: Analyzing trace with hash 667835334, now seen corresponding path program 43 times [2018-10-04 09:51:41,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:41,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:41,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:41,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:41,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:42,274 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:43,091 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:43,450 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:43,450 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:43,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:43,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:43,482 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:43,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:43,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 09:51:43,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 09:51:43,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 09:51:43,589 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:43,589 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-10-04 09:51:43,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:43,711 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-04 09:51:43,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 09:51:43,712 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-04 09:51:43,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:43,712 INFO L225 Difference]: With dead ends: 50 [2018-10-04 09:51:43,712 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 09:51:43,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.8s impTime 16 [2018-10-04 09:51:43,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 09:51:43,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 09:51:43,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 09:51:43,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-04 09:51:43,715 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-04 09:51:43,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:43,715 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-04 09:51:43,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 09:51:43,716 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-04 09:51:43,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 09:51:43,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:43,716 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-10-04 09:51:43,716 INFO L423 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:43,716 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:43,717 INFO L82 PathProgramCache]: Analyzing trace with hash -771944992, now seen corresponding path program 44 times [2018-10-04 09:51:43,717 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:43,717 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:43,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:43,718 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:43,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:44,089 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:44,439 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:44,781 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:44,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:44,790 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:51:44,813 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:51:44,814 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:44,815 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:44,908 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:44,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 09:51:44,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 09:51:44,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 09:51:44,909 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:44,909 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-10-04 09:51:44,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:44,980 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 09:51:44,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 09:51:44,981 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-10-04 09:51:44,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:44,982 INFO L225 Difference]: With dead ends: 51 [2018-10-04 09:51:44,982 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 09:51:44,982 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.8s impTime 17 [2018-10-04 09:51:44,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 09:51:44,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 09:51:44,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 09:51:44,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-04 09:51:44,985 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-04 09:51:44,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:44,985 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-04 09:51:44,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 09:51:44,986 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-04 09:51:44,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 09:51:44,986 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:44,986 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-10-04 09:51:44,986 INFO L423 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:44,986 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:44,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1839505158, now seen corresponding path program 45 times [2018-10-04 09:51:44,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:44,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:44,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:44,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:44,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:45,266 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:45,903 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:46,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:46,007 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:46,017 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:51:46,053 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 09:51:46,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:46,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:46,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:46,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 09:51:46,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 09:51:46,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 09:51:46,178 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:46,178 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-10-04 09:51:46,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:46,620 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-04 09:51:46,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 09:51:46,620 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-10-04 09:51:46,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:46,620 INFO L225 Difference]: With dead ends: 52 [2018-10-04 09:51:46,621 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 09:51:46,621 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 18 [2018-10-04 09:51:46,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 09:51:46,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 09:51:46,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 09:51:46,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-04 09:51:46,623 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-04 09:51:46,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:46,623 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-04 09:51:46,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 09:51:46,623 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-04 09:51:46,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 09:51:46,624 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:46,625 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-10-04 09:51:46,625 INFO L423 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:46,625 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:46,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1190081184, now seen corresponding path program 46 times [2018-10-04 09:51:46,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:46,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:46,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:46,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:46,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:47,109 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:47,482 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:47,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:47,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:47,886 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:47,894 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:51:47,922 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:51:47,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:47,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:48,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:48,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:48,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 09:51:48,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 09:51:48,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 09:51:48,041 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:48,041 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-10-04 09:51:48,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:48,112 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 09:51:48,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 09:51:48,113 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-10-04 09:51:48,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:48,113 INFO L225 Difference]: With dead ends: 53 [2018-10-04 09:51:48,114 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 09:51:48,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 1.0s impTime 19 [2018-10-04 09:51:48,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 09:51:48,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 09:51:48,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 09:51:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 09:51:48,116 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-04 09:51:48,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:48,117 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 09:51:48,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 09:51:48,117 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 09:51:48,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 09:51:48,117 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:48,117 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-10-04 09:51:48,118 INFO L423 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:48,118 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:48,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1762192826, now seen corresponding path program 47 times [2018-10-04 09:51:48,118 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:48,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:48,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:48,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:48,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:48,523 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:48,735 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:48,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:48,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:48,930 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:48,937 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:51:48,971 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 09:51:48,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:48,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:49,083 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:49,083 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 09:51:49,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 09:51:49,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 09:51:49,084 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:49,084 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-10-04 09:51:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:49,156 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-04 09:51:49,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 09:51:49,156 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-04 09:51:49,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:49,157 INFO L225 Difference]: With dead ends: 54 [2018-10-04 09:51:49,157 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 09:51:49,157 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 20 [2018-10-04 09:51:49,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 09:51:49,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 09:51:49,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 09:51:49,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-04 09:51:49,162 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-04 09:51:49,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:49,164 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-04 09:51:49,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 09:51:49,164 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-04 09:51:49,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 09:51:49,165 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:49,165 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-10-04 09:51:49,165 INFO L423 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:49,165 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:49,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1206593376, now seen corresponding path program 48 times [2018-10-04 09:51:49,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:49,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:49,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:49,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:49,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:49,451 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:49,864 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:50,093 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:50,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:50,100 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:51:50,136 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 09:51:50,136 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:50,138 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:50,243 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:50,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 09:51:50,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 09:51:50,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 09:51:50,244 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:50,244 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-10-04 09:51:50,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:50,305 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 09:51:50,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 09:51:50,306 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-10-04 09:51:50,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:50,306 INFO L225 Difference]: With dead ends: 55 [2018-10-04 09:51:50,307 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 09:51:50,307 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 21 [2018-10-04 09:51:50,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 09:51:50,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 09:51:50,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 09:51:50,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-04 09:51:50,310 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-04 09:51:50,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:50,310 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-04 09:51:50,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 09:51:50,311 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-04 09:51:50,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 09:51:50,311 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:50,311 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-10-04 09:51:50,311 INFO L423 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:50,311 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:50,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1250314874, now seen corresponding path program 49 times [2018-10-04 09:51:50,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:50,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:50,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:50,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:50,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:50,549 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:50,912 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:51,277 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:51,282 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:51,282 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:51,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:51,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:51,319 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:51,417 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:51,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 09:51:51,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 09:51:51,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 09:51:51,418 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:51,418 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-10-04 09:51:51,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:51,479 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-04 09:51:51,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 09:51:51,479 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-10-04 09:51:51,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:51,480 INFO L225 Difference]: With dead ends: 56 [2018-10-04 09:51:51,480 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 09:51:51,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 7 [2018-10-04 09:51:51,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 09:51:51,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 09:51:51,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 09:51:51,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-04 09:51:51,483 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-04 09:51:51,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:51,483 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-04 09:51:51,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 09:51:51,484 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-04 09:51:51,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 09:51:51,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:51,484 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-10-04 09:51:51,484 INFO L423 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:51,485 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:51,485 INFO L82 PathProgramCache]: Analyzing trace with hash -105059296, now seen corresponding path program 50 times [2018-10-04 09:51:51,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:51,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:51,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:51,486 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:51:51,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:51,747 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:52,326 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:52,535 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:52,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:52,552 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:52,560 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:51:52,598 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:51:52,598 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:52,600 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:52,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:52,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 09:51:52,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 09:51:52,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 09:51:52,717 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:52,717 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-10-04 09:51:52,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:52,802 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 09:51:52,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 09:51:52,802 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-10-04 09:51:52,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:52,803 INFO L225 Difference]: With dead ends: 57 [2018-10-04 09:51:52,803 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 09:51:52,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.8s impTime 8 [2018-10-04 09:51:52,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 09:51:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 09:51:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 09:51:52,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 09:51:52,806 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-04 09:51:52,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:52,806 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 09:51:52,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 09:51:52,806 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 09:51:52,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 09:51:52,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:52,807 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-10-04 09:51:52,807 INFO L423 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:52,807 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:52,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1038125254, now seen corresponding path program 51 times [2018-10-04 09:51:52,807 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:52,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:52,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:52,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:52,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:53,108 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:53,280 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:53,614 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:53,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:53,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:53,677 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:51:53,849 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 09:51:53,849 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:53,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:54,195 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:54,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 09:51:54,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 09:51:54,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 09:51:54,196 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:54,196 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-10-04 09:51:54,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:54,266 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-04 09:51:54,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 09:51:54,267 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-04 09:51:54,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:54,268 INFO L225 Difference]: With dead ends: 58 [2018-10-04 09:51:54,268 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 09:51:54,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 9 [2018-10-04 09:51:54,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 09:51:54,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 09:51:54,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 09:51:54,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-04 09:51:54,271 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-04 09:51:54,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:54,271 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-04 09:51:54,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 09:51:54,271 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-04 09:51:54,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 09:51:54,271 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:54,272 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-10-04 09:51:54,272 INFO L423 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:54,272 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:54,272 INFO L82 PathProgramCache]: Analyzing trace with hash 2117107936, now seen corresponding path program 52 times [2018-10-04 09:51:54,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:54,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:54,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:54,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:54,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:54,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:54,613 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:55,022 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:55,603 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:55,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:55,802 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:55,809 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:51:55,841 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:51:55,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:55,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:55,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:55,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:55,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 09:51:55,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 09:51:55,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 09:51:55,986 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:55,986 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-10-04 09:51:56,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:56,079 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 09:51:56,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 09:51:56,079 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-10-04 09:51:56,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:56,080 INFO L225 Difference]: With dead ends: 59 [2018-10-04 09:51:56,081 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 09:51:56,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime 10 [2018-10-04 09:51:56,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 09:51:56,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 09:51:56,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 09:51:56,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-04 09:51:56,083 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-04 09:51:56,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:56,083 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-04 09:51:56,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 09:51:56,083 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-04 09:51:56,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 09:51:56,084 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:56,084 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-10-04 09:51:56,084 INFO L423 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:56,084 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:56,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1205832710, now seen corresponding path program 53 times [2018-10-04 09:51:56,084 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:56,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:56,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:56,085 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:56,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:56,304 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:56,496 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:56,848 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:57,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:57,141 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:57,141 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:57,148 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:51:57,193 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 09:51:57,194 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:57,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:57,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:57,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:57,415 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 09:51:57,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 09:51:57,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 09:51:57,416 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:57,416 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-10-04 09:51:57,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:57,523 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-04 09:51:57,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 09:51:57,523 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-10-04 09:51:57,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:57,524 INFO L225 Difference]: With dead ends: 60 [2018-10-04 09:51:57,524 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 09:51:57,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.8s impTime 11 [2018-10-04 09:51:57,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 09:51:57,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 09:51:57,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 09:51:57,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-04 09:51:57,527 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-04 09:51:57,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:57,527 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-04 09:51:57,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 09:51:57,528 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-04 09:51:57,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 09:51:57,528 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:57,528 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-10-04 09:51:57,528 INFO L423 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:57,528 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:57,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1273895520, now seen corresponding path program 54 times [2018-10-04 09:51:57,528 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:57,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:57,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:57,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:57,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:51:57,899 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:51:58,416 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:58,731 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:51:58,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:58,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:51:58,790 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:51:58,798 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:51:58,837 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 09:51:58,837 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:51:58,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:51:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:51:59,050 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:51:59,050 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 09:51:59,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 09:51:59,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 09:51:59,051 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:51:59,051 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-10-04 09:51:59,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:51:59,117 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 09:51:59,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 09:51:59,118 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-10-04 09:51:59,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:51:59,118 INFO L225 Difference]: With dead ends: 61 [2018-10-04 09:51:59,119 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 09:51:59,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.9s impTime 12 [2018-10-04 09:51:59,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 09:51:59,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 09:51:59,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 09:51:59,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 09:51:59,121 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-04 09:51:59,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:51:59,122 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 09:51:59,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 09:51:59,122 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 09:51:59,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 09:51:59,122 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:51:59,122 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-10-04 09:51:59,123 INFO L423 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:51:59,123 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:51:59,123 INFO L82 PathProgramCache]: Analyzing trace with hash -836059322, now seen corresponding path program 55 times [2018-10-04 09:51:59,123 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:51:59,123 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:51:59,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:59,124 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:51:59,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:51:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:00,045 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:00,386 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:00,954 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:01,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:01,225 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:01,232 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:01,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:01,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:01,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:01,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 09:52:01,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 09:52:01,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 09:52:01,378 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:01,378 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-10-04 09:52:01,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:01,489 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-04 09:52:01,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 09:52:01,489 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-04 09:52:01,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:01,490 INFO L225 Difference]: With dead ends: 62 [2018-10-04 09:52:01,490 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 09:52:01,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.6s impTime 13 [2018-10-04 09:52:01,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 09:52:01,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 09:52:01,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 09:52:01,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-04 09:52:01,493 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-04 09:52:01,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:01,494 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-04 09:52:01,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 09:52:01,494 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-04 09:52:01,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 09:52:01,494 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:01,494 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-10-04 09:52:01,494 INFO L423 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:01,495 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:01,495 INFO L82 PathProgramCache]: Analyzing trace with hash -148039072, now seen corresponding path program 56 times [2018-10-04 09:52:01,495 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:01,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:01,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:01,495 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:01,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:01,723 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:02,075 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:02,798 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:02,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:02,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:02,858 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:52:02,890 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:52:02,890 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:02,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:03,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:03,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 09:52:03,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 09:52:03,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 09:52:03,022 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:03,023 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-10-04 09:52:03,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:03,090 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 09:52:03,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 09:52:03,090 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-10-04 09:52:03,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:03,091 INFO L225 Difference]: With dead ends: 63 [2018-10-04 09:52:03,091 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 09:52:03,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.1s impTime 14 [2018-10-04 09:52:03,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 09:52:03,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 09:52:03,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 09:52:03,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-04 09:52:03,095 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-04 09:52:03,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:03,095 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-04 09:52:03,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 09:52:03,095 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-04 09:52:03,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 09:52:03,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:03,096 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-10-04 09:52:03,096 INFO L423 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:03,096 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:03,096 INFO L82 PathProgramCache]: Analyzing trace with hash -294247802, now seen corresponding path program 57 times [2018-10-04 09:52:03,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:03,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:03,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:03,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:03,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:03,383 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:03,767 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:04,026 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:04,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:04,394 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:04,404 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:52:04,450 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-04 09:52:04,450 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:04,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:04,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:04,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 09:52:04,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 09:52:04,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 09:52:04,569 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:04,569 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-10-04 09:52:04,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:04,662 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-04 09:52:04,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 09:52:04,662 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-10-04 09:52:04,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:04,663 INFO L225 Difference]: With dead ends: 64 [2018-10-04 09:52:04,663 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 09:52:04,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 1.0s impTime 15 [2018-10-04 09:52:04,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 09:52:04,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-04 09:52:04,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 09:52:04,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-04 09:52:04,665 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-04 09:52:04,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:04,665 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-04 09:52:04,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 09:52:04,666 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-04 09:52:04,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-04 09:52:04,666 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:04,666 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-10-04 09:52:04,667 INFO L423 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:04,667 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:04,667 INFO L82 PathProgramCache]: Analyzing trace with hash -531751136, now seen corresponding path program 58 times [2018-10-04 09:52:04,667 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:04,667 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:04,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:04,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:04,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:05,066 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:05,295 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:05,699 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:06,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:06,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:06,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:06,023 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:52:06,058 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:52:06,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:06,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:06,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:06,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-04 09:52:06,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 09:52:06,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 09:52:06,195 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:06,195 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-10-04 09:52:06,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:06,285 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 09:52:06,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 09:52:06,285 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-10-04 09:52:06,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:06,286 INFO L225 Difference]: With dead ends: 65 [2018-10-04 09:52:06,286 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 09:52:06,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime 16 [2018-10-04 09:52:06,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 09:52:06,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 09:52:06,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 09:52:06,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-04 09:52:06,290 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-04 09:52:06,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:06,290 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-04 09:52:06,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 09:52:06,290 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-04 09:52:06,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 09:52:06,290 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:06,290 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-10-04 09:52:06,291 INFO L423 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:06,291 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:06,291 INFO L82 PathProgramCache]: Analyzing trace with hash 695580102, now seen corresponding path program 59 times [2018-10-04 09:52:06,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:06,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:06,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:06,291 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:06,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:08,309 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:08,664 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:09,087 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:09,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:09,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:09,188 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:09,195 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:52:09,242 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 09:52:09,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:09,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:09,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:09,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:09,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 09:52:09,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 09:52:09,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 09:52:09,426 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:09,426 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-10-04 09:52:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:09,527 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-04 09:52:09,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 09:52:09,527 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-04 09:52:09,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:09,528 INFO L225 Difference]: With dead ends: 66 [2018-10-04 09:52:09,528 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 09:52:09,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.3s impTime 17 [2018-10-04 09:52:09,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 09:52:09,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 09:52:09,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 09:52:09,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-04 09:52:09,531 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-04 09:52:09,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:09,531 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-04 09:52:09,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 09:52:09,532 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-04 09:52:09,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 09:52:09,532 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:09,532 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-10-04 09:52:09,532 INFO L423 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:09,532 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:09,532 INFO L82 PathProgramCache]: Analyzing trace with hash 88142816, now seen corresponding path program 60 times [2018-10-04 09:52:09,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:09,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:09,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:09,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:09,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:09,849 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:10,200 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:10,754 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:11,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:11,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:11,302 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:11,310 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:52:11,360 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 09:52:11,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:11,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:11,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:11,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:11,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-04 09:52:11,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 09:52:11,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 09:52:11,498 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:11,499 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-10-04 09:52:11,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:11,602 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-04 09:52:11,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 09:52:11,602 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-10-04 09:52:11,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:11,603 INFO L225 Difference]: With dead ends: 67 [2018-10-04 09:52:11,603 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 09:52:11,603 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.5s impTime 18 [2018-10-04 09:52:11,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 09:52:11,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 09:52:11,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 09:52:11,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-04 09:52:11,605 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-04 09:52:11,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:11,606 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-04 09:52:11,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 09:52:11,606 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-04 09:52:11,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 09:52:11,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:11,606 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-10-04 09:52:11,607 INFO L423 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:11,607 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:11,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1562543866, now seen corresponding path program 61 times [2018-10-04 09:52:11,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:11,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:11,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:11,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:11,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:11,792 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:11,993 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:12,658 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:13,309 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:13,309 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:13,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:13,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:13,483 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:13,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 09:52:13,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 09:52:13,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 09:52:13,484 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:13,485 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-10-04 09:52:13,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:13,585 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-04 09:52:13,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 09:52:13,586 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-10-04 09:52:13,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:13,587 INFO L225 Difference]: With dead ends: 68 [2018-10-04 09:52:13,587 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 09:52:13,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.4s impTime 19 [2018-10-04 09:52:13,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 09:52:13,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 09:52:13,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 09:52:13,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-04 09:52:13,590 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-04 09:52:13,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:13,590 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-04 09:52:13,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 09:52:13,590 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-04 09:52:13,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 09:52:13,590 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:13,590 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-10-04 09:52:13,591 INFO L423 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:13,591 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:13,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1194223456, now seen corresponding path program 62 times [2018-10-04 09:52:13,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:13,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:13,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:13,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:13,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:14,452 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:14,627 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:15,053 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:15,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:15,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:15,711 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:52:15,748 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:52:15,748 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:15,751 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:15,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:15,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-04 09:52:15,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 09:52:15,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 09:52:15,896 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:15,896 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-10-04 09:52:16,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:16,040 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-04 09:52:16,040 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 09:52:16,040 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-10-04 09:52:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:16,041 INFO L225 Difference]: With dead ends: 69 [2018-10-04 09:52:16,041 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 09:52:16,041 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.6s impTime 20 [2018-10-04 09:52:16,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 09:52:16,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 09:52:16,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 09:52:16,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-04 09:52:16,044 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-04 09:52:16,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:16,045 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-04 09:52:16,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 09:52:16,045 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-04 09:52:16,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 09:52:16,045 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:16,046 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-10-04 09:52:16,046 INFO L423 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:16,046 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:16,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1633774662, now seen corresponding path program 63 times [2018-10-04 09:52:16,046 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:16,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:16,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:16,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:16,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:16,227 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:16,500 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:17,015 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:17,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:17,960 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:17,971 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:52:18,081 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-04 09:52:18,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:18,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:18,226 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:18,226 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-04 09:52:18,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 09:52:18,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 09:52:18,227 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:18,227 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-10-04 09:52:18,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:18,372 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-04 09:52:18,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 09:52:18,372 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-04 09:52:18,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:18,373 INFO L225 Difference]: With dead ends: 70 [2018-10-04 09:52:18,373 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 09:52:18,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.6s impTime 21 [2018-10-04 09:52:18,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 09:52:18,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 09:52:18,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 09:52:18,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-04 09:52:18,376 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-04 09:52:18,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:18,377 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-04 09:52:18,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 09:52:18,377 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-04 09:52:18,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 09:52:18,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:18,377 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-10-04 09:52:18,378 INFO L423 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:18,378 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:18,378 INFO L82 PathProgramCache]: Analyzing trace with hash -892596896, now seen corresponding path program 64 times [2018-10-04 09:52:18,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:18,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:18,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:18,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:18,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:18,628 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:19,026 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:19,619 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:19,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:19,954 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:19,969 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:52:20,027 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:52:20,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:20,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:20,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:20,163 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:20,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-04 09:52:20,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 09:52:20,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 09:52:20,168 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:20,168 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-10-04 09:52:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:20,250 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-04 09:52:20,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 09:52:20,251 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-10-04 09:52:20,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:20,251 INFO L225 Difference]: With dead ends: 71 [2018-10-04 09:52:20,252 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 09:52:20,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.3s impTime 22 [2018-10-04 09:52:20,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 09:52:20,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 09:52:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 09:52:20,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-04 09:52:20,254 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-04 09:52:20,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:20,255 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-04 09:52:20,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 09:52:20,255 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-04 09:52:20,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 09:52:20,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:20,255 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-10-04 09:52:20,255 INFO L423 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:20,255 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:20,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1900703866, now seen corresponding path program 65 times [2018-10-04 09:52:20,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:20,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:20,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:20,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:20,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:20,478 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:20,746 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:20,984 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:21,411 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:21,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:21,418 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:52:21,471 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-04 09:52:21,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:21,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:21,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:21,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:21,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 09:52:21,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 09:52:21,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 09:52:21,644 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:21,645 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-10-04 09:52:21,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:21,858 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-04 09:52:21,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 09:52:21,859 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-10-04 09:52:21,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:21,860 INFO L225 Difference]: With dead ends: 72 [2018-10-04 09:52:21,860 INFO L226 Difference]: Without dead ends: 70 [2018-10-04 09:52:21,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.9s impTime 23 [2018-10-04 09:52:21,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-04 09:52:21,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-04 09:52:21,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 09:52:21,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-04 09:52:21,863 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-04 09:52:21,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:21,863 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-04 09:52:21,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 09:52:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-04 09:52:21,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-04 09:52:21,864 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:21,864 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-10-04 09:52:21,864 INFO L423 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:21,864 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:21,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1207718432, now seen corresponding path program 66 times [2018-10-04 09:52:21,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:21,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:21,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:21,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:21,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:21,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:22,058 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:22,448 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:23,290 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:24,147 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:24,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:24,154 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:52:24,204 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-04 09:52:24,204 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:24,207 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:25,826 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:25,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-04 09:52:25,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-04 09:52:25,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-04 09:52:25,827 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:25,827 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-10-04 09:52:25,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:25,942 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-04 09:52:25,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 09:52:25,943 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-10-04 09:52:25,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:25,943 INFO L225 Difference]: With dead ends: 73 [2018-10-04 09:52:25,944 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 09:52:25,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time 2.0s impTime 24 [2018-10-04 09:52:25,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 09:52:25,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 09:52:25,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 09:52:25,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-04 09:52:25,946 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-10-04 09:52:25,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:25,946 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-04 09:52:25,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-04 09:52:25,946 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-04 09:52:25,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 09:52:25,947 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:25,947 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-10-04 09:52:25,947 INFO L423 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:25,947 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:25,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1215438138, now seen corresponding path program 67 times [2018-10-04 09:52:25,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:25,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:25,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:25,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:25,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:26,128 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:26,451 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:26,964 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:28,154 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:28,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:28,161 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:28,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:28,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:28,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:28,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 09:52:28,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 09:52:28,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 09:52:28,345 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:28,345 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-10-04 09:52:28,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:28,476 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-04 09:52:28,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 09:52:28,476 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-10-04 09:52:28,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:28,477 INFO L225 Difference]: With dead ends: 74 [2018-10-04 09:52:28,477 INFO L226 Difference]: Without dead ends: 72 [2018-10-04 09:52:28,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.9s impTime 8 [2018-10-04 09:52:28,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-04 09:52:28,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-04 09:52:28,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-04 09:52:28,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-04 09:52:28,479 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-10-04 09:52:28,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:28,480 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-04 09:52:28,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 09:52:28,480 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-04 09:52:28,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-04 09:52:28,481 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:28,481 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-10-04 09:52:28,481 INFO L423 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:28,481 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:28,481 INFO L82 PathProgramCache]: Analyzing trace with hash 976119520, now seen corresponding path program 68 times [2018-10-04 09:52:28,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:28,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:28,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:28,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:28,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:28,692 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:28,940 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:29,369 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:30,134 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:30,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:30,189 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:30,189 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:30,197 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:52:30,235 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:52:30,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:30,238 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:30,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:30,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-04 09:52:30,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 09:52:30,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 09:52:30,380 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:30,380 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-10-04 09:52:30,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:30,497 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-04 09:52:30,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 09:52:30,498 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-10-04 09:52:30,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:30,499 INFO L225 Difference]: With dead ends: 75 [2018-10-04 09:52:30,499 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 09:52:30,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.4s impTime 9 [2018-10-04 09:52:30,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 09:52:30,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 09:52:30,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 09:52:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-04 09:52:30,502 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-04 09:52:30,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:30,502 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-04 09:52:30,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 09:52:30,502 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-04 09:52:30,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 09:52:30,502 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:30,502 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-10-04 09:52:30,503 INFO L423 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:30,503 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:30,503 INFO L82 PathProgramCache]: Analyzing trace with hash 194930182, now seen corresponding path program 69 times [2018-10-04 09:52:30,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:30,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:30,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:30,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:30,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:30,685 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:31,023 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:31,516 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:32,471 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:32,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:32,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:32,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:32,608 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:52:32,672 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-04 09:52:32,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:32,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:33,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:33,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-04 09:52:33,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 09:52:33,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 09:52:33,136 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:33,136 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-10-04 09:52:33,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:33,295 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-04 09:52:33,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 09:52:33,296 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-10-04 09:52:33,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:33,297 INFO L225 Difference]: With dead ends: 76 [2018-10-04 09:52:33,297 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 09:52:33,297 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.8s impTime 10 [2018-10-04 09:52:33,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 09:52:33,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-04 09:52:33,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-04 09:52:33,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-04 09:52:33,300 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-04 09:52:33,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:33,300 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-04 09:52:33,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 09:52:33,301 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-04 09:52:33,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-04 09:52:33,301 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:33,301 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-10-04 09:52:33,302 INFO L423 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:33,302 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:33,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1747864480, now seen corresponding path program 70 times [2018-10-04 09:52:33,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:33,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:33,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:33,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:33,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:33,543 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:33,969 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:34,580 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:35,576 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:35,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:35,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:35,774 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:52:35,816 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:52:35,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:35,820 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:35,969 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:35,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-04 09:52:35,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-04 09:52:35,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-04 09:52:35,971 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:35,971 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-10-04 09:52:36,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:36,173 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-04 09:52:36,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 09:52:36,173 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-10-04 09:52:36,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:36,174 INFO L225 Difference]: With dead ends: 77 [2018-10-04 09:52:36,174 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 09:52:36,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.1s impTime 11 [2018-10-04 09:52:36,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 09:52:36,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 09:52:36,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 09:52:36,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-04 09:52:36,177 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-04 09:52:36,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:36,177 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-04 09:52:36,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-04 09:52:36,177 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-04 09:52:36,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 09:52:36,178 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:36,178 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-10-04 09:52:36,178 INFO L423 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:36,178 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:36,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1650779834, now seen corresponding path program 71 times [2018-10-04 09:52:36,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:36,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:36,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:36,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:36,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:36,404 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:36,792 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:36,972 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:37,444 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:37,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:37,602 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:37,602 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:37,609 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:52:37,695 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-04 09:52:37,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:37,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:38,065 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:38,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 09:52:38,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 09:52:38,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 09:52:38,066 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:38,067 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-10-04 09:52:38,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:38,212 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-04 09:52:38,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 09:52:38,213 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-10-04 09:52:38,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:38,213 INFO L225 Difference]: With dead ends: 78 [2018-10-04 09:52:38,213 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 09:52:38,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime 12 [2018-10-04 09:52:38,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 09:52:38,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 09:52:38,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 09:52:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-04 09:52:38,217 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-04 09:52:38,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:38,217 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-04 09:52:38,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 09:52:38,217 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-04 09:52:38,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-04 09:52:38,218 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:38,218 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-10-04 09:52:38,218 INFO L423 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:38,218 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:38,219 INFO L82 PathProgramCache]: Analyzing trace with hash 365428832, now seen corresponding path program 72 times [2018-10-04 09:52:38,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:38,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:38,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:38,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:38,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:38,547 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:38,965 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:39,563 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:40,327 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:40,375 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:40,375 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:40,383 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:52:40,446 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 09:52:40,446 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:40,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:40,700 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:40,700 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-04 09:52:40,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 09:52:40,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 09:52:40,701 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:40,701 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-10-04 09:52:40,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:40,818 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-04 09:52:40,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 09:52:40,818 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-10-04 09:52:40,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:40,819 INFO L225 Difference]: With dead ends: 79 [2018-10-04 09:52:40,819 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 09:52:40,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.8s impTime 13 [2018-10-04 09:52:40,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 09:52:40,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 09:52:40,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 09:52:40,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-04 09:52:40,822 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-10-04 09:52:40,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:40,822 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-04 09:52:40,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 09:52:40,822 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-04 09:52:40,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 09:52:40,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:40,823 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-10-04 09:52:40,823 INFO L423 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:40,823 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:40,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1556611962, now seen corresponding path program 73 times [2018-10-04 09:52:40,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:40,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:40,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:40,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:40,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:41,413 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:41,583 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:41,987 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:42,962 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:43,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:43,644 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:43,645 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:43,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:43,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:43,849 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:43,849 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 09:52:43,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 09:52:43,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 09:52:43,850 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:43,850 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-10-04 09:52:44,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:44,036 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-04 09:52:44,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 09:52:44,037 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-10-04 09:52:44,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:44,037 INFO L225 Difference]: With dead ends: 80 [2018-10-04 09:52:44,038 INFO L226 Difference]: Without dead ends: 78 [2018-10-04 09:52:44,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.4s impTime 14 [2018-10-04 09:52:44,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-04 09:52:44,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-04 09:52:44,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-04 09:52:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-04 09:52:44,041 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-10-04 09:52:44,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:44,041 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-04 09:52:44,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 09:52:44,041 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-04 09:52:44,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 09:52:44,041 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:44,042 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-10-04 09:52:44,042 INFO L423 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:44,042 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:44,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1010334432, now seen corresponding path program 74 times [2018-10-04 09:52:44,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:44,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:44,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:44,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:52:44,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:44,318 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:44,617 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:44,923 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:45,941 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:46,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:46,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:46,398 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:52:46,441 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:52:46,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:46,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:46,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:46,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-04 09:52:46,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 09:52:46,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 09:52:46,597 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:46,597 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-10-04 09:52:46,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:46,759 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-04 09:52:46,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 09:52:46,760 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-10-04 09:52:46,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:46,760 INFO L225 Difference]: With dead ends: 81 [2018-10-04 09:52:46,760 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 09:52:46,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 2.0s impTime 15 [2018-10-04 09:52:46,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 09:52:46,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 09:52:46,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 09:52:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-04 09:52:46,763 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-10-04 09:52:46,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:46,763 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-04 09:52:46,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 09:52:46,763 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-04 09:52:46,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 09:52:46,764 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:46,764 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-10-04 09:52:46,764 INFO L423 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:46,764 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:46,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1255600186, now seen corresponding path program 75 times [2018-10-04 09:52:46,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:46,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:46,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:46,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:46,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:47,028 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:47,323 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:47,623 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:48,841 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:49,358 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:49,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:49,366 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:52:49,430 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-04 09:52:49,430 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:49,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:49,610 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:49,610 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-04 09:52:49,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 09:52:49,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 09:52:49,611 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:49,611 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-10-04 09:52:49,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:49,765 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-04 09:52:49,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 09:52:49,766 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-10-04 09:52:49,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:49,767 INFO L225 Difference]: With dead ends: 82 [2018-10-04 09:52:49,767 INFO L226 Difference]: Without dead ends: 80 [2018-10-04 09:52:49,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.2s impTime 16 [2018-10-04 09:52:49,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-04 09:52:49,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-04 09:52:49,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 09:52:49,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-04 09:52:49,770 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-10-04 09:52:49,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:49,770 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-04 09:52:49,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 09:52:49,770 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-04 09:52:49,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-04 09:52:49,770 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:49,771 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-10-04 09:52:49,771 INFO L423 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:49,771 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:49,771 INFO L82 PathProgramCache]: Analyzing trace with hash -268903968, now seen corresponding path program 76 times [2018-10-04 09:52:49,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:49,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:49,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:49,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:49,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:50,014 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:50,184 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:50,589 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:51,571 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:52,154 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:52,155 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:52,162 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:52:52,205 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:52:52,205 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:52,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:52,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:52,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-04 09:52:52,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-04 09:52:52,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-04 09:52:52,364 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:52,364 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-10-04 09:52:53,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:53,604 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-04 09:52:53,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 09:52:53,605 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-10-04 09:52:53,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:53,605 INFO L225 Difference]: With dead ends: 83 [2018-10-04 09:52:53,606 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 09:52:53,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 2.1s impTime 17 [2018-10-04 09:52:53,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 09:52:53,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 09:52:53,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 09:52:53,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-04 09:52:53,608 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-10-04 09:52:53,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:53,609 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-04 09:52:53,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-04 09:52:53,609 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-04 09:52:53,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 09:52:53,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:53,609 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-10-04 09:52:53,610 INFO L423 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:53,610 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:53,610 INFO L82 PathProgramCache]: Analyzing trace with hash 253907718, now seen corresponding path program 77 times [2018-10-04 09:52:53,610 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:53,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:53,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:53,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:53,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:54,031 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:54,450 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:55,053 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:55,821 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:55,930 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:55,930 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:55,937 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:52:56,007 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-04 09:52:56,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:56,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:56,273 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:56,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-04 09:52:56,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 09:52:56,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 09:52:56,274 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:56,274 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-10-04 09:52:56,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:56,389 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-10-04 09:52:56,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 09:52:56,389 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-10-04 09:52:56,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:56,390 INFO L225 Difference]: With dead ends: 84 [2018-10-04 09:52:56,390 INFO L226 Difference]: Without dead ends: 82 [2018-10-04 09:52:56,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.9s impTime 18 [2018-10-04 09:52:56,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-04 09:52:56,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-04 09:52:56,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 09:52:56,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-04 09:52:56,392 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-10-04 09:52:56,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:56,392 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-04 09:52:56,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 09:52:56,392 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-04 09:52:56,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-04 09:52:56,392 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:56,393 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-10-04 09:52:56,393 INFO L423 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:56,393 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:56,393 INFO L82 PathProgramCache]: Analyzing trace with hash -718799200, now seen corresponding path program 78 times [2018-10-04 09:52:56,393 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:56,393 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:56,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:56,394 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:56,394 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:56,620 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:57,024 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:57,197 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:57,674 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:52:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:58,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:52:58,077 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:52:58,085 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:52:58,151 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-04 09:52:58,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:52:58,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:52:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:52:58,311 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:52:58,311 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-04 09:52:58,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-04 09:52:58,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-04 09:52:58,312 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:52:58,312 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-10-04 09:52:58,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:52:58,469 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-04 09:52:58,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 09:52:58,469 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-10-04 09:52:58,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:52:58,470 INFO L225 Difference]: With dead ends: 85 [2018-10-04 09:52:58,470 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 09:52:58,470 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.3s impTime 19 [2018-10-04 09:52:58,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 09:52:58,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 09:52:58,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 09:52:58,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-04 09:52:58,473 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-10-04 09:52:58,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:52:58,473 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-04 09:52:58,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-04 09:52:58,473 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-04 09:52:58,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 09:52:58,474 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:52:58,474 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-10-04 09:52:58,474 INFO L423 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:52:58,474 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:52:58,474 INFO L82 PathProgramCache]: Analyzing trace with hash -807942586, now seen corresponding path program 79 times [2018-10-04 09:52:58,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:52:58,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:52:58,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:58,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:52:58,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:52:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:52:58,893 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:52:59,329 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:52:59,932 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:00,915 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:01,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:01,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:01,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:53:01,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:01,763 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:02,006 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:02,006 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-04 09:53:02,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 09:53:02,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 09:53:02,007 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:02,007 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-10-04 09:53:02,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:02,199 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-04 09:53:02,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 09:53:02,199 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-10-04 09:53:02,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:02,200 INFO L225 Difference]: With dead ends: 86 [2018-10-04 09:53:02,200 INFO L226 Difference]: Without dead ends: 84 [2018-10-04 09:53:02,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time 2.8s impTime 20 [2018-10-04 09:53:02,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-04 09:53:02,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-04 09:53:02,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 09:53:02,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-04 09:53:02,203 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-10-04 09:53:02,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:02,203 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-04 09:53:02,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 09:53:02,203 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-04 09:53:02,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 09:53:02,204 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:02,204 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-10-04 09:53:02,204 INFO L423 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:02,204 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:02,204 INFO L82 PathProgramCache]: Analyzing trace with hash 723579744, now seen corresponding path program 80 times [2018-10-04 09:53:02,204 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:02,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:02,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:02,205 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:53:02,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:02,434 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:02,749 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:03,290 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:04,507 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:04,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:04,819 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:04,826 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:53:04,870 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:53:04,871 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:04,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:05,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:05,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:05,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-04 09:53:05,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 09:53:05,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 09:53:05,861 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:05,861 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-10-04 09:53:05,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:05,988 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-04 09:53:05,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 09:53:05,988 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-10-04 09:53:05,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:05,989 INFO L225 Difference]: With dead ends: 87 [2018-10-04 09:53:05,989 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 09:53:05,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.2s impTime 21 [2018-10-04 09:53:05,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 09:53:05,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 09:53:05,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 09:53:05,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-04 09:53:05,993 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-10-04 09:53:05,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:05,993 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-04 09:53:05,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 09:53:05,993 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-04 09:53:05,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 09:53:05,994 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:05,994 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-10-04 09:53:05,994 INFO L423 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:05,994 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:05,994 INFO L82 PathProgramCache]: Analyzing trace with hash 956131718, now seen corresponding path program 81 times [2018-10-04 09:53:05,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:05,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:05,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:05,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:05,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:06,592 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:06,854 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:07,308 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:08,240 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:09,312 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:09,312 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:09,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:53:09,395 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-04 09:53:09,395 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:09,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:09,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:09,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-04 09:53:09,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 09:53:09,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 09:53:09,594 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:09,594 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-10-04 09:53:09,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:09,773 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-04 09:53:09,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-04 09:53:09,774 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-10-04 09:53:09,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:09,775 INFO L225 Difference]: With dead ends: 88 [2018-10-04 09:53:09,775 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 09:53:09,775 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.7s impTime 22 [2018-10-04 09:53:09,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 09:53:09,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-04 09:53:09,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 09:53:09,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-04 09:53:09,779 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-10-04 09:53:09,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:09,779 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-04 09:53:09,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 09:53:09,779 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-04 09:53:09,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-04 09:53:09,779 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:09,779 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-10-04 09:53:09,780 INFO L423 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:09,780 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:09,780 INFO L82 PathProgramCache]: Analyzing trace with hash -424691680, now seen corresponding path program 82 times [2018-10-04 09:53:09,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:09,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:09,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:09,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:09,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:09,959 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:10,302 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:10,846 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:11,829 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:12,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:12,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:12,072 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:53:12,123 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:53:12,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:12,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:12,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:12,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-04 09:53:12,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-04 09:53:12,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-04 09:53:12,437 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:12,437 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-10-04 09:53:12,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:12,878 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-04 09:53:12,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-04 09:53:12,878 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-10-04 09:53:12,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:12,879 INFO L225 Difference]: With dead ends: 89 [2018-10-04 09:53:12,879 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 09:53:12,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.9s impTime 23 [2018-10-04 09:53:12,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 09:53:12,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-04 09:53:12,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 09:53:12,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-04 09:53:12,883 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-10-04 09:53:12,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:12,883 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-04 09:53:12,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-04 09:53:12,883 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-04 09:53:12,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 09:53:12,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:12,884 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-10-04 09:53:12,884 INFO L423 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:12,884 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:12,885 INFO L82 PathProgramCache]: Analyzing trace with hash -280544058, now seen corresponding path program 83 times [2018-10-04 09:53:12,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:12,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:12,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:12,885 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:12,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:13,367 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:13,801 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:14,626 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:15,611 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:16,695 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:16,695 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:16,705 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:53:16,782 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-04 09:53:16,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:16,785 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:16,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:16,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-04 09:53:16,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 09:53:16,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 09:53:16,955 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:16,956 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-10-04 09:53:17,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:17,151 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-10-04 09:53:17,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-04 09:53:17,151 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-10-04 09:53:17,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:17,152 INFO L225 Difference]: With dead ends: 90 [2018-10-04 09:53:17,152 INFO L226 Difference]: Without dead ends: 88 [2018-10-04 09:53:17,152 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s Time 3.3s impTime 24 [2018-10-04 09:53:17,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-04 09:53:17,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-04 09:53:17,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 09:53:17,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-04 09:53:17,155 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-10-04 09:53:17,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:17,155 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-04 09:53:17,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 09:53:17,155 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-04 09:53:17,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-04 09:53:17,156 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:17,156 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-10-04 09:53:17,156 INFO L423 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:17,157 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:17,157 INFO L82 PathProgramCache]: Analyzing trace with hash -106935072, now seen corresponding path program 84 times [2018-10-04 09:53:17,157 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:17,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:17,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:17,158 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:17,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:17,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:17,408 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:17,664 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:17,916 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:18,490 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:19,544 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:19,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:19,552 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:19,562 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:53:19,635 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 09:53:19,635 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:19,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:19,809 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:19,810 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-04 09:53:19,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-04 09:53:19,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-04 09:53:19,811 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:19,811 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-10-04 09:53:20,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:20,172 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-04 09:53:20,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-04 09:53:20,172 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-10-04 09:53:20,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:20,173 INFO L225 Difference]: With dead ends: 91 [2018-10-04 09:53:20,173 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 09:53:20,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 2.0s impTime 8 [2018-10-04 09:53:20,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 09:53:20,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-04 09:53:20,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 09:53:20,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-04 09:53:20,177 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-10-04 09:53:20,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:20,177 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-04 09:53:20,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-04 09:53:20,177 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-04 09:53:20,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 09:53:20,178 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:20,178 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-10-04 09:53:20,178 INFO L423 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:20,178 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:20,178 INFO L82 PathProgramCache]: Analyzing trace with hash 979976198, now seen corresponding path program 85 times [2018-10-04 09:53:20,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:20,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:20,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:20,179 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:20,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:20,618 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:21,038 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:21,650 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:22,064 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:22,454 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:22,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:22,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:22,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:53:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:22,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:22,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:22,715 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-04 09:53:22,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 09:53:22,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 09:53:22,716 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:22,716 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-10-04 09:53:22,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:22,849 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-04 09:53:22,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-04 09:53:22,850 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-10-04 09:53:22,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:22,851 INFO L225 Difference]: With dead ends: 92 [2018-10-04 09:53:22,851 INFO L226 Difference]: Without dead ends: 90 [2018-10-04 09:53:22,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.8s impTime 9 [2018-10-04 09:53:22,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-04 09:53:22,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-04 09:53:22,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 09:53:22,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-04 09:53:22,854 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-10-04 09:53:22,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:22,854 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-04 09:53:22,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 09:53:22,854 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-04 09:53:22,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-04 09:53:22,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:22,855 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-10-04 09:53:22,855 INFO L423 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:22,855 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:22,855 INFO L82 PathProgramCache]: Analyzing trace with hash 314487200, now seen corresponding path program 86 times [2018-10-04 09:53:22,855 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:22,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:22,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:22,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:53:22,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:23,027 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:23,315 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:23,820 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:25,209 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:25,716 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:25,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:25,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:25,758 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:53:25,808 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:53:25,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:25,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:25,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:25,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-04 09:53:25,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-04 09:53:25,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-04 09:53:25,982 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:25,982 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-10-04 09:53:26,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:26,131 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-04 09:53:26,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 09:53:26,131 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-10-04 09:53:26,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:26,132 INFO L225 Difference]: With dead ends: 93 [2018-10-04 09:53:26,132 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 09:53:26,132 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.3s impTime 10 [2018-10-04 09:53:26,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 09:53:26,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 09:53:26,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 09:53:26,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-04 09:53:26,134 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-10-04 09:53:26,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:26,134 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-04 09:53:26,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-04 09:53:26,135 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-04 09:53:26,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 09:53:26,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:26,135 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-10-04 09:53:26,136 INFO L423 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:26,136 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:26,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1159164742, now seen corresponding path program 87 times [2018-10-04 09:53:26,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:26,136 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:26,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:26,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:26,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:26,362 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:26,542 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:26,967 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:27,947 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:28,935 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:28,964 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:28,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:28,973 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:53:29,055 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-04 09:53:29,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:29,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:29,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:29,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-04 09:53:29,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 09:53:29,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 09:53:29,324 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:29,324 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-10-04 09:53:29,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:29,500 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-04 09:53:29,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-04 09:53:29,500 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-10-04 09:53:29,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:29,500 INFO L225 Difference]: With dead ends: 94 [2018-10-04 09:53:29,501 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 09:53:29,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.4s impTime 11 [2018-10-04 09:53:29,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 09:53:29,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-04 09:53:29,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 09:53:29,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-04 09:53:29,503 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-10-04 09:53:29,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:29,503 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-04 09:53:29,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 09:53:29,504 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-04 09:53:29,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-04 09:53:29,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:29,504 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-10-04 09:53:29,504 INFO L423 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:29,504 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:29,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1574364768, now seen corresponding path program 88 times [2018-10-04 09:53:29,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:29,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:29,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:29,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:29,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:29,737 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:29,945 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:30,390 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:31,380 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:32,234 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:32,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:32,279 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:32,285 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:53:32,341 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:53:32,342 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:32,344 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:32,524 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:32,524 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-04 09:53:32,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-04 09:53:32,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-04 09:53:32,525 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:32,525 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-10-04 09:53:32,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:32,688 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-04 09:53:32,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 09:53:32,688 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-10-04 09:53:32,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:32,689 INFO L225 Difference]: With dead ends: 95 [2018-10-04 09:53:32,689 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 09:53:32,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.4s impTime 12 [2018-10-04 09:53:32,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 09:53:32,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 09:53:32,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 09:53:32,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-04 09:53:32,691 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-10-04 09:53:32,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:32,691 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-04 09:53:32,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-04 09:53:32,691 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-04 09:53:32,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 09:53:32,692 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:32,692 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-10-04 09:53:32,692 INFO L423 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:32,692 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:32,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1560663686, now seen corresponding path program 89 times [2018-10-04 09:53:32,692 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:32,692 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:32,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:32,693 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:32,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:32,887 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:33,254 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:33,819 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:35,039 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:35,255 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:35,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:35,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:35,369 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:53:35,484 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-04 09:53:35,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:35,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:35,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:35,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-04 09:53:35,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 09:53:35,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 09:53:35,727 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:35,727 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-10-04 09:53:35,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:35,895 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-10-04 09:53:35,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-04 09:53:35,895 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-10-04 09:53:35,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:35,896 INFO L225 Difference]: With dead ends: 96 [2018-10-04 09:53:35,896 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 09:53:35,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.3s impTime 13 [2018-10-04 09:53:35,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 09:53:35,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-04 09:53:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 09:53:35,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-04 09:53:35,899 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-10-04 09:53:35,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:35,899 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-04 09:53:35,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 09:53:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-04 09:53:35,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 09:53:35,899 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:35,899 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-10-04 09:53:35,899 INFO L423 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:35,900 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:35,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1135930144, now seen corresponding path program 90 times [2018-10-04 09:53:35,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:35,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:35,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:35,901 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:35,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:35,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:36,095 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:36,469 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:36,911 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:37,195 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:37,731 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:37,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:37,973 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:37,981 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:53:38,060 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-04 09:53:38,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:38,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:38,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:38,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:38,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-04 09:53:38,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-04 09:53:38,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-04 09:53:38,249 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:38,250 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-10-04 09:53:38,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:38,421 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-04 09:53:38,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-04 09:53:38,421 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-10-04 09:53:38,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:38,422 INFO L225 Difference]: With dead ends: 97 [2018-10-04 09:53:38,423 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 09:53:38,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.7s impTime 14 [2018-10-04 09:53:38,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 09:53:38,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 09:53:38,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 09:53:38,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-04 09:53:38,426 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-10-04 09:53:38,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:38,426 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-04 09:53:38,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-04 09:53:38,426 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-04 09:53:38,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 09:53:38,427 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:38,427 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-10-04 09:53:38,427 INFO L423 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:38,427 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:38,428 INFO L82 PathProgramCache]: Analyzing trace with hash 854092230, now seen corresponding path program 91 times [2018-10-04 09:53:38,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:38,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:38,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:38,428 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:38,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:38,624 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:38,857 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:39,276 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:40,285 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:41,282 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:41,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:41,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:41,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:53:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:41,814 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:41,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:41,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:41,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-04 09:53:41,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 09:53:41,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 09:53:41,998 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:41,999 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-10-04 09:53:42,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:42,220 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-04 09:53:42,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-04 09:53:42,220 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-10-04 09:53:42,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:42,221 INFO L225 Difference]: With dead ends: 98 [2018-10-04 09:53:42,221 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 09:53:42,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time 2.9s impTime 15 [2018-10-04 09:53:42,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 09:53:42,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-04 09:53:42,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 09:53:42,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-04 09:53:42,223 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-10-04 09:53:42,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:42,224 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-04 09:53:42,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 09:53:42,224 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-04 09:53:42,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-04 09:53:42,224 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:42,224 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-10-04 09:53:42,224 INFO L423 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:42,224 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:42,224 INFO L82 PathProgramCache]: Analyzing trace with hash 707051488, now seen corresponding path program 92 times [2018-10-04 09:53:42,225 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:42,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:42,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:42,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:53:42,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:42,590 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:42,995 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:43,268 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:44,261 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:45,708 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:46,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:46,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:46,345 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:53:46,400 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:53:46,400 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:46,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:46,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:46,646 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:46,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-04 09:53:46,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-04 09:53:46,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-04 09:53:46,647 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:46,647 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-10-04 09:53:46,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:46,878 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-04 09:53:46,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-04 09:53:46,879 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-10-04 09:53:46,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:46,880 INFO L225 Difference]: With dead ends: 99 [2018-10-04 09:53:46,880 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 09:53:46,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s Time 3.6s impTime 16 [2018-10-04 09:53:46,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 09:53:46,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 09:53:46,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 09:53:46,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-04 09:53:46,882 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-10-04 09:53:46,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:46,882 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-04 09:53:46,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-04 09:53:46,882 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-04 09:53:46,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 09:53:46,883 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:46,883 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-10-04 09:53:46,883 INFO L423 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:46,884 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:46,884 INFO L82 PathProgramCache]: Analyzing trace with hash 443755782, now seen corresponding path program 93 times [2018-10-04 09:53:46,884 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:46,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:46,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:46,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:46,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:47,147 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:47,516 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:48,038 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:48,289 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:48,797 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:49,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:49,149 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:49,155 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:53:49,242 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-04 09:53:49,242 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:49,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:49,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:49,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:49,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-04 09:53:49,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 09:53:49,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 09:53:49,441 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:49,441 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-10-04 09:53:49,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:49,599 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-04 09:53:49,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-04 09:53:49,599 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-10-04 09:53:49,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:49,600 INFO L225 Difference]: With dead ends: 100 [2018-10-04 09:53:49,600 INFO L226 Difference]: Without dead ends: 98 [2018-10-04 09:53:49,600 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.8s impTime 17 [2018-10-04 09:53:49,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-04 09:53:49,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-04 09:53:49,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-04 09:53:49,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-04 09:53:49,603 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-10-04 09:53:49,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:49,603 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-04 09:53:49,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 09:53:49,603 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-04 09:53:49,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-04 09:53:49,604 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:49,604 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-10-04 09:53:49,604 INFO L423 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:49,604 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:49,605 INFO L82 PathProgramCache]: Analyzing trace with hash 871523488, now seen corresponding path program 94 times [2018-10-04 09:53:49,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:49,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:49,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:49,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:49,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:50,025 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:50,386 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:50,988 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:51,971 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:53,168 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:53,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:53,971 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:53,988 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:53:54,048 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:53:54,048 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:54,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:54,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:54,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-04 09:53:54,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-04 09:53:54,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-04 09:53:54,237 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:54,237 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-10-04 09:53:54,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:54,514 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-04 09:53:54,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-04 09:53:54,514 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-10-04 09:53:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:54,515 INFO L225 Difference]: With dead ends: 101 [2018-10-04 09:53:54,515 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 09:53:54,515 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s Time 3.9s impTime 18 [2018-10-04 09:53:54,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 09:53:54,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-04 09:53:54,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 09:53:54,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-04 09:53:54,517 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-10-04 09:53:54,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:54,517 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-04 09:53:54,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-04 09:53:54,517 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-04 09:53:54,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 09:53:54,518 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:54,518 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-10-04 09:53:54,518 INFO L423 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:54,518 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:54,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420486, now seen corresponding path program 95 times [2018-10-04 09:53:54,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:54,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:54,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:54,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:54,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:54,693 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:55,342 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:55,660 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:56,006 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:56,600 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:53:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:57,094 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:53:57,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:53:57,102 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:53:57,192 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-04 09:53:57,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:53:57,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:53:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:53:57,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:53:57,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-04 09:53:57,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 09:53:57,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 09:53:57,385 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:53:57,385 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-10-04 09:53:57,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:53:57,569 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-04 09:53:57,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-04 09:53:57,569 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-10-04 09:53:57,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:53:57,569 INFO L225 Difference]: With dead ends: 102 [2018-10-04 09:53:57,570 INFO L226 Difference]: Without dead ends: 100 [2018-10-04 09:53:57,570 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.1s impTime 19 [2018-10-04 09:53:57,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-04 09:53:57,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-04 09:53:57,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 09:53:57,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-04 09:53:57,572 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-10-04 09:53:57,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:53:57,572 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-04 09:53:57,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 09:53:57,572 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-04 09:53:57,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-04 09:53:57,572 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:53:57,572 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-10-04 09:53:57,573 INFO L423 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:53:57,573 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:53:57,573 INFO L82 PathProgramCache]: Analyzing trace with hash 15325536, now seen corresponding path program 96 times [2018-10-04 09:53:57,573 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:53:57,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:53:57,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:57,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:53:57,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:53:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:53:57,809 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:53:58,025 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:58,404 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:53:59,383 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:00,810 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:01,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:01,107 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:01,115 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:54:01,203 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 09:54:01,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:01,206 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:01,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:01,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-04 09:54:01,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-04 09:54:01,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-04 09:54:01,396 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:01,396 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-10-04 09:54:01,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:01,605 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-04 09:54:01,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-04 09:54:01,605 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-10-04 09:54:01,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:01,606 INFO L225 Difference]: With dead ends: 103 [2018-10-04 09:54:01,606 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 09:54:01,606 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 3.1s impTime 20 [2018-10-04 09:54:01,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 09:54:01,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 09:54:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 09:54:01,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-04 09:54:01,608 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-10-04 09:54:01,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:01,608 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-04 09:54:01,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-04 09:54:01,609 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-04 09:54:01,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 09:54:01,609 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:01,610 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-10-04 09:54:01,610 INFO L423 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:01,610 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:01,610 INFO L82 PathProgramCache]: Analyzing trace with hash 475087750, now seen corresponding path program 97 times [2018-10-04 09:54:01,611 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:01,611 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:01,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:01,611 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:01,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:01,867 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:02,299 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:02,903 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:03,884 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:05,205 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:06,339 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:06,339 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:06,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:54:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:06,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:06,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:06,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-04 09:54:06,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 09:54:06,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 09:54:06,610 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:06,610 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-10-04 09:54:06,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:06,878 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-10-04 09:54:06,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-04 09:54:06,879 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-10-04 09:54:06,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:06,880 INFO L225 Difference]: With dead ends: 104 [2018-10-04 09:54:06,880 INFO L226 Difference]: Without dead ends: 102 [2018-10-04 09:54:06,880 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s Time 4.2s impTime 21 [2018-10-04 09:54:06,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-04 09:54:06,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-04 09:54:06,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-04 09:54:06,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-04 09:54:06,884 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-10-04 09:54:06,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:06,884 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-04 09:54:06,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 09:54:06,884 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-04 09:54:06,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-04 09:54:06,884 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:06,884 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-10-04 09:54:06,885 INFO L423 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:06,885 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:06,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1842814496, now seen corresponding path program 98 times [2018-10-04 09:54:06,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:06,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:06,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:06,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:54:06,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:07,124 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:07,304 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:07,630 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:08,281 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:09,163 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:10,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:10,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:10,163 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:54:10,221 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:54:10,221 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:10,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:10,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:10,469 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:10,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-04 09:54:10,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-04 09:54:10,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-04 09:54:10,471 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:10,471 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-10-04 09:54:10,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:10,732 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-04 09:54:10,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-04 09:54:10,733 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-10-04 09:54:10,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:10,733 INFO L225 Difference]: With dead ends: 105 [2018-10-04 09:54:10,733 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 09:54:10,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s Time 2.8s impTime 22 [2018-10-04 09:54:10,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 09:54:10,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 09:54:10,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 09:54:10,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-04 09:54:10,736 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-10-04 09:54:10,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:10,736 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-04 09:54:10,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-04 09:54:10,737 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-04 09:54:10,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 09:54:10,737 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:10,737 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-10-04 09:54:10,737 INFO L423 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:10,737 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:10,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1292670662, now seen corresponding path program 99 times [2018-10-04 09:54:10,738 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:10,738 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:10,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:10,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:10,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:10,934 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:11,335 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:11,553 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:11,959 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:12,610 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:13,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:13,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:13,521 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 09:54:13,620 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-04 09:54:13,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:13,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:13,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:13,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-04 09:54:13,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 09:54:13,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 09:54:13,824 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:13,824 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-10-04 09:54:14,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:14,073 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-04 09:54:14,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-04 09:54:14,074 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-10-04 09:54:14,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:14,075 INFO L225 Difference]: With dead ends: 106 [2018-10-04 09:54:14,075 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 09:54:14,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.3s impTime 23 [2018-10-04 09:54:14,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 09:54:14,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-04 09:54:14,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 09:54:14,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-04 09:54:14,077 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-10-04 09:54:14,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:14,078 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-04 09:54:14,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 09:54:14,078 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-04 09:54:14,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-04 09:54:14,078 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:14,079 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-10-04 09:54:14,079 INFO L423 AbstractCegarLoop]: === Iteration 101 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:14,079 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:14,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1418080992, now seen corresponding path program 100 times [2018-10-04 09:54:14,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:14,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:14,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:14,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:14,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:14,275 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:14,656 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:15,035 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:15,497 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:16,080 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:17,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:17,032 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:17,039 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:54:17,104 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:54:17,105 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:17,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:17,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:17,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-04 09:54:17,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-04 09:54:17,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-04 09:54:17,304 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:17,304 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-10-04 09:54:17,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:17,550 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-04 09:54:17,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-04 09:54:17,550 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-10-04 09:54:17,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:17,551 INFO L225 Difference]: With dead ends: 107 [2018-10-04 09:54:17,551 INFO L226 Difference]: Without dead ends: 105 [2018-10-04 09:54:17,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.5s impTime 24 [2018-10-04 09:54:17,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-04 09:54:17,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-04 09:54:17,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 09:54:17,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-04 09:54:17,554 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-10-04 09:54:17,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:17,554 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-04 09:54:17,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-04 09:54:17,554 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-04 09:54:17,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 09:54:17,555 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:17,555 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-10-04 09:54:17,555 INFO L423 AbstractCegarLoop]: === Iteration 102 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:17,555 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:17,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1010833926, now seen corresponding path program 101 times [2018-10-04 09:54:17,556 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:17,556 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:17,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:17,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:17,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:17,776 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:18,169 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:18,435 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:18,809 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:19,429 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:20,769 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:20,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:20,783 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:20,791 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:54:20,894 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-10-04 09:54:20,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:20,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:21,096 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:21,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-04 09:54:21,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 09:54:21,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 09:54:21,098 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:21,098 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-10-04 09:54:21,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:21,352 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-10-04 09:54:21,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-04 09:54:21,352 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-10-04 09:54:21,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:21,354 INFO L225 Difference]: With dead ends: 108 [2018-10-04 09:54:21,354 INFO L226 Difference]: Without dead ends: 106 [2018-10-04 09:54:21,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s Time 2.7s impTime 8 [2018-10-04 09:54:21,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-04 09:54:21,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-04 09:54:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 09:54:21,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-04 09:54:21,357 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-10-04 09:54:21,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:21,357 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-04 09:54:21,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 09:54:21,357 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-04 09:54:21,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-04 09:54:21,358 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:21,358 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-10-04 09:54:21,358 INFO L423 AbstractCegarLoop]: === Iteration 103 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:21,358 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:21,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1271076768, now seen corresponding path program 102 times [2018-10-04 09:54:21,359 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:21,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:21,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:21,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:21,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:21,635 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:21,895 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:22,171 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:22,758 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:23,581 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:24,833 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:24,939 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:24,939 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:24,945 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:54:25,052 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-10-04 09:54:25,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:25,055 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:25,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:25,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-04 09:54:25,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-04 09:54:25,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-04 09:54:25,260 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:25,260 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-10-04 09:54:25,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:25,564 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-04 09:54:25,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-04 09:54:25,564 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-10-04 09:54:25,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:25,565 INFO L225 Difference]: With dead ends: 109 [2018-10-04 09:54:25,565 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 09:54:25,565 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 3.0s impTime 9 [2018-10-04 09:54:25,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 09:54:25,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-04 09:54:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 09:54:25,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-04 09:54:25,569 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-10-04 09:54:25,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:25,569 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-04 09:54:25,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-04 09:54:25,569 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-04 09:54:25,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 09:54:25,570 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:25,570 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-10-04 09:54:25,570 INFO L423 AbstractCegarLoop]: === Iteration 104 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:25,570 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:25,570 INFO L82 PathProgramCache]: Analyzing trace with hash 748670278, now seen corresponding path program 103 times [2018-10-04 09:54:25,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:25,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:25,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:25,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:25,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:25,949 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:26,349 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:26,930 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:27,882 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:29,060 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:30,490 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:30,741 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:30,741 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:30,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:54:30,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:30,811 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:31,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:31,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-04 09:54:31,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 09:54:31,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 09:54:31,096 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:31,096 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-10-04 09:54:31,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:31,418 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-04 09:54:31,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-04 09:54:31,419 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-10-04 09:54:31,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:31,419 INFO L225 Difference]: With dead ends: 110 [2018-10-04 09:54:31,419 INFO L226 Difference]: Without dead ends: 108 [2018-10-04 09:54:31,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s Time 4.6s impTime 10 [2018-10-04 09:54:31,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-04 09:54:31,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-04 09:54:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 09:54:31,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-04 09:54:31,422 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-10-04 09:54:31,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:31,422 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-04 09:54:31,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 09:54:31,422 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-04 09:54:31,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 09:54:31,423 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:31,423 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-10-04 09:54:31,423 INFO L423 AbstractCegarLoop]: === Iteration 105 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:31,423 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:31,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1733938272, now seen corresponding path program 104 times [2018-10-04 09:54:31,423 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:31,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:31,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:31,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:54:31,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:31,790 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:32,141 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:32,422 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:33,401 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:34,595 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:35,562 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:35,603 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:35,603 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:35,620 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:54:35,681 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:54:35,681 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:35,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:35,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:35,979 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:35,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-04 09:54:35,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-04 09:54:35,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-04 09:54:35,980 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:35,980 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-10-04 09:54:36,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:36,235 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-04 09:54:36,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-04 09:54:36,236 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-10-04 09:54:36,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:36,237 INFO L225 Difference]: With dead ends: 111 [2018-10-04 09:54:36,237 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 09:54:36,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s Time 3.6s impTime 11 [2018-10-04 09:54:36,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 09:54:36,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 09:54:36,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 09:54:36,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-04 09:54:36,240 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-10-04 09:54:36,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:36,240 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-04 09:54:36,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-04 09:54:36,240 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-04 09:54:36,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 09:54:36,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:36,241 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-10-04 09:54:36,241 INFO L423 AbstractCegarLoop]: === Iteration 106 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:36,241 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:36,241 INFO L82 PathProgramCache]: Analyzing trace with hash -2082492282, now seen corresponding path program 105 times [2018-10-04 09:54:36,241 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:36,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:36,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:36,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:36,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:36,483 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:36,855 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:37,455 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:37,732 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:38,178 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:38,896 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:39,096 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:39,096 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) [2018-10-04 09:54:39,105 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:39,210 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-10-04 09:54:39,210 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:39,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:39,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:39,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-04 09:54:39,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-04 09:54:39,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-04 09:54:39,418 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:39,418 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. [2018-10-04 09:54:39,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:39,621 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2018-10-04 09:54:39,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-10-04 09:54:39,621 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 108 [2018-10-04 09:54:39,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:39,622 INFO L225 Difference]: With dead ends: 112 [2018-10-04 09:54:39,622 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 09:54:39,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.4s impTime 12 [2018-10-04 09:54:39,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 09:54:39,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2018-10-04 09:54:39,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-04 09:54:39,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2018-10-04 09:54:39,624 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2018-10-04 09:54:39,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:39,624 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2018-10-04 09:54:39,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-10-04 09:54:39,624 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2018-10-04 09:54:39,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-10-04 09:54:39,625 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:39,625 INFO L375 BasicCegarLoop]: trace histogram [106, 1, 1, 1] [2018-10-04 09:54:39,625 INFO L423 AbstractCegarLoop]: === Iteration 107 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:39,625 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:39,625 INFO L82 PathProgramCache]: Analyzing trace with hash -132755168, now seen corresponding path program 106 times [2018-10-04 09:54:39,626 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:39,626 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:39,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:39,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:39,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:39,891 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:40,309 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:40,909 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:41,919 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:43,107 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:44,556 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:45,028 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:45,028 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:45,044 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 09:54:45,112 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 09:54:45,112 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:45,115 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:45,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5671 backedges. 0 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:45,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:45,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-10-04 09:54:45,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-10-04 09:54:45,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-10-04 09:54:45,322 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:45,322 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 109 states. [2018-10-04 09:54:45,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:45,671 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-10-04 09:54:45,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-10-04 09:54:45,671 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 109 [2018-10-04 09:54:45,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:45,672 INFO L225 Difference]: With dead ends: 113 [2018-10-04 09:54:45,672 INFO L226 Difference]: Without dead ends: 111 [2018-10-04 09:54:45,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s Time 4.9s impTime 13 [2018-10-04 09:54:45,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-04 09:54:45,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-04 09:54:45,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-04 09:54:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-10-04 09:54:45,674 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2018-10-04 09:54:45,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:45,675 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-10-04 09:54:45,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-10-04 09:54:45,675 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-10-04 09:54:45,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-10-04 09:54:45,676 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:45,676 INFO L375 BasicCegarLoop]: trace histogram [107, 1, 1, 1] [2018-10-04 09:54:45,676 INFO L423 AbstractCegarLoop]: === Iteration 108 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:45,676 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:45,676 INFO L82 PathProgramCache]: Analyzing trace with hash 179553222, now seen corresponding path program 107 times [2018-10-04 09:54:45,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:45,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:45,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:45,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:45,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:45,970 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:46,417 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:47,017 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:47,683 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:47,995 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:48,926 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:49,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:49,489 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:49,496 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 09:54:49,604 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2018-10-04 09:54:49,604 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:49,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:49,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:49,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:49,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-10-04 09:54:49,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-10-04 09:54:49,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-10-04 09:54:49,819 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:49,819 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 110 states. [2018-10-04 09:54:50,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:50,103 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2018-10-04 09:54:50,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-10-04 09:54:50,103 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 110 [2018-10-04 09:54:50,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:50,103 INFO L225 Difference]: With dead ends: 114 [2018-10-04 09:54:50,103 INFO L226 Difference]: Without dead ends: 112 [2018-10-04 09:54:50,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 3.3s impTime 14 [2018-10-04 09:54:50,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2018-10-04 09:54:50,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2018-10-04 09:54:50,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 09:54:50,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2018-10-04 09:54:50,105 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 110 [2018-10-04 09:54:50,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:50,106 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2018-10-04 09:54:50,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-10-04 09:54:50,106 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2018-10-04 09:54:50,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-04 09:54:50,106 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:50,106 INFO L375 BasicCegarLoop]: trace histogram [108, 1, 1, 1] [2018-10-04 09:54:50,106 INFO L423 AbstractCegarLoop]: === Iteration 109 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:50,107 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:50,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1271178720, now seen corresponding path program 108 times [2018-10-04 09:54:50,107 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:50,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:50,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:50,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:50,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:50,468 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:50,846 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:51,484 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:52,463 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:53,655 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:55,110 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:55,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:54:55,768 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:54:55,775 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 09:54:55,878 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-10-04 09:54:55,878 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:54:55,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:54:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5886 backedges. 0 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:54:56,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:54:56,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-10-04 09:54:56,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-10-04 09:54:56,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-10-04 09:54:56,095 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:54:56,095 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 111 states. [2018-10-04 09:54:56,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:54:56,462 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-10-04 09:54:56,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-10-04 09:54:56,462 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 111 [2018-10-04 09:54:56,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:54:56,462 INFO L225 Difference]: With dead ends: 115 [2018-10-04 09:54:56,462 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 09:54:56,463 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s Time 5.1s impTime 15 [2018-10-04 09:54:56,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 09:54:56,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-10-04 09:54:56,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-10-04 09:54:56,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-10-04 09:54:56,466 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 111 [2018-10-04 09:54:56,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:54:56,466 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-10-04 09:54:56,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-10-04 09:54:56,466 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-10-04 09:54:56,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-04 09:54:56,467 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:54:56,467 INFO L375 BasicCegarLoop]: trace histogram [109, 1, 1, 1] [2018-10-04 09:54:56,467 INFO L423 AbstractCegarLoop]: === Iteration 110 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:54:56,467 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:54:56,467 INFO L82 PathProgramCache]: Analyzing trace with hash 751830790, now seen corresponding path program 109 times [2018-10-04 09:54:56,467 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:54:56,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:54:56,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:56,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:54:56,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:54:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:54:56,768 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:54:57,106 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:57,305 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:54:57,800 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:58,535 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:54:59,531 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:00,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:00,082 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:55:00,082 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:55:00,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:55:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:55:00,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:55:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:00,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:55:00,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-10-04 09:55:00,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-10-04 09:55:00,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-10-04 09:55:00,368 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:55:00,368 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 112 states. [2018-10-04 09:55:00,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:55:00,645 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2018-10-04 09:55:00,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-10-04 09:55:00,646 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 112 [2018-10-04 09:55:00,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:55:00,646 INFO L225 Difference]: With dead ends: 116 [2018-10-04 09:55:00,646 INFO L226 Difference]: Without dead ends: 114 [2018-10-04 09:55:00,646 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s Time 3.1s impTime 16 [2018-10-04 09:55:00,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-04 09:55:00,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2018-10-04 09:55:00,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-10-04 09:55:00,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 114 transitions. [2018-10-04 09:55:00,649 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 114 transitions. Word has length 112 [2018-10-04 09:55:00,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:55:00,649 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 114 transitions. [2018-10-04 09:55:00,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-10-04 09:55:00,649 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 114 transitions. [2018-10-04 09:55:00,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-04 09:55:00,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:55:00,650 INFO L375 BasicCegarLoop]: trace histogram [110, 1, 1, 1] [2018-10-04 09:55:00,650 INFO L423 AbstractCegarLoop]: === Iteration 111 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:55:00,650 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:55:00,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1831914144, now seen corresponding path program 110 times [2018-10-04 09:55:00,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:55:00,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:55:00,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:00,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 09:55:00,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:55:00,908 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:55:01,307 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:01,893 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:02,770 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:03,015 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:03,913 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 09:55:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:04,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 09:55:04,762 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 09:55:04,769 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 09:55:04,833 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 09:55:04,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 09:55:04,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 09:55:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 0 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 09:55:05,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 09:55:05,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-10-04 09:55:05,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-10-04 09:55:05,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-10-04 09:55:05,058 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 09:55:05,058 INFO L87 Difference]: Start difference. First operand 114 states and 114 transitions. Second operand 113 states. [2018-10-04 09:55:05,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 09:55:05,364 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-10-04 09:55:05,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-10-04 09:55:05,364 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 113 [2018-10-04 09:55:05,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 09:55:05,365 INFO L225 Difference]: With dead ends: 117 [2018-10-04 09:55:05,365 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 09:55:05,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time 3.6s impTime 17 [2018-10-04 09:55:05,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 09:55:05,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-10-04 09:55:05,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 09:55:05,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-10-04 09:55:05,369 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 113 [2018-10-04 09:55:05,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 09:55:05,369 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-10-04 09:55:05,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-10-04 09:55:05,369 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-10-04 09:55:05,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 09:55:05,370 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 09:55:05,370 INFO L375 BasicCegarLoop]: trace histogram [111, 1, 1, 1] [2018-10-04 09:55:05,370 INFO L423 AbstractCegarLoop]: === Iteration 112 === [mainErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 09:55:05,370 INFO L104 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 09:55:05,370 INFO L82 PathProgramCache]: Analyzing trace with hash 954759750, now seen corresponding path program 111 times [2018-10-04 09:55:05,371 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 09:55:05,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 09:55:05,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:05,371 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 09:55:05,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 09:55:05,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 09:55:05,677 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 09:55:05,900 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:06,242 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 09:55:07,236 INFO L248 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 Received shutdown request... [2018-10-04 09:55:08,033 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 09:55:08,038 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 09:55:08,038 INFO L202 PluginConnector]: Adding new model Luxembourg.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 09:55:08 BoogieIcfgContainer [2018-10-04 09:55:08,038 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 09:55:08,039 INFO L168 Benchmark]: Toolchain (without parser) took 236686.35 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -123.2 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 164.4 MB). Peak memory consumption was 41.2 MB. Max. memory is 7.1 GB. [2018-10-04 09:55:08,040 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:55:08,040 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.91 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:55:08,041 INFO L168 Benchmark]: Boogie Preprocessor took 22.80 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 09:55:08,041 INFO L168 Benchmark]: RCFGBuilder took 301.29 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 09:55:08,042 INFO L168 Benchmark]: TraceAbstraction took 236316.36 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -123.2 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 143.3 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2018-10-04 09:55:08,045 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 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 41.91 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.80 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 301.29 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 236316.36 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -123.2 MB). Free memory was 1.4 GB in the beginning and 1.3 GB in the end (delta: 143.3 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 24]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 24). Cancelled while BasicCegarLoop was analyzing trace of length 115 with TraceHistMax 111, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while NestedInterpolantsBuilder was constructing predicates for 113 interpolants. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 236.2s OverallTime, 112 OverallIterations, 111 TraceHistogramMax, 16.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 335 SDtfs, 2 SDslu, 4461 SDs, 0 SdLazy, 10788 SolverSat, 157 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12652 GetRequests, 6436 SyntacticMatches, 0 SemanticMatches, 6216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 190.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=111, 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, 111 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.6s SsaConstructionTime, 5.8s SatisfiabilityAnalysisTime, 205.5s InterpolantComputationTime, 12873 NumberOfCodeBlocks, 12873 NumberOfCodeBlocksAsserted, 1779 NumberOfCheckSat, 12652 ConstructedInterpolants, 0 QuantifiedInterpolants, 2822278 SizeOfPredicates, 110 NumberOfNonLiveVariables, 25410 ConjunctsInSsa, 6325 ConjunctsInUnsatCore, 221 InterpolantComputations, 1 PerfectInterpolantSequences, 0/455840 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/Luxembourg.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_09-55-08-055.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Luxembourg.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_09-55-08-055.csv Completed graceful shutdown