java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_2.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 20:40:10,029 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 20:40:10,031 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 20:40:10,043 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 20:40:10,043 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 20:40:10,044 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 20:40:10,045 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 20:40:10,047 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 20:40:10,049 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 20:40:10,050 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 20:40:10,051 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 20:40:10,051 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 20:40:10,052 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 20:40:10,053 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 20:40:10,054 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 20:40:10,055 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 20:40:10,056 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 20:40:10,057 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 20:40:10,059 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 20:40:10,061 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 20:40:10,062 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 20:40:10,063 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 20:40:10,066 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 20:40:10,075 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-09-30 20:40:10,090 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 20:40:10,090 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 20:40:10,091 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 20:40:10,091 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 20:40:10,093 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 20:40:10,093 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 20:40:10,093 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 20:40:10,093 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 20:40:10,093 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 20:40:10,094 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 20:40:10,094 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 20:40:10,094 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 20:40:10,094 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 20:40:10,095 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 20:40:10,095 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 20:40:10,095 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 20:40:10,096 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 20:40:10,096 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 20:40:10,096 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 20:40:10,096 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 20:40:10,098 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 20:40:10,098 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 20:40:10,098 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:40:10,098 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 20:40:10,099 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 20:40:10,099 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 20:40:10,099 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 20:40:10,099 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 20:40:10,099 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 20:40:10,100 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 20:40:10,100 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-09-30 20:40:10,151 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 20:40:10,167 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 20:40:10,174 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 20:40:10,175 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 20:40:10,176 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 20:40:10,177 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_2.i_3.bpl [2018-09-30 20:40:10,177 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/count_by_2.i_3.bpl' [2018-09-30 20:40:10,227 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 20:40:10,230 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 20:40:10,231 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 20:40:10,231 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 20:40:10,231 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 20:40:10,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:40:10" (1/1) ... [2018-09-30 20:40:10,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:40:10" (1/1) ... [2018-09-30 20:40:10,270 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 20:40:10,271 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 20:40:10,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 20:40:10,272 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 20:40:10,283 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:40:10" (1/1) ... [2018-09-30 20:40:10,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:40:10" (1/1) ... [2018-09-30 20:40:10,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:40:10" (1/1) ... [2018-09-30 20:40:10,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:40:10" (1/1) ... [2018-09-30 20:40:10,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:40:10" (1/1) ... [2018-09-30 20:40:10,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:40:10" (1/1) ... [2018-09-30 20:40:10,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:40:10" (1/1) ... [2018-09-30 20:40:10,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 20:40:10,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 20:40:10,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 20:40:10,296 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 20:40:10,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:40:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 20:40:10,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 20:40:10,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 20:40:10,622 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 20:40:10,624 INFO L202 PluginConnector]: Adding new model count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:40:10 BoogieIcfgContainer [2018-09-30 20:40:10,624 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 20:40:10,626 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 20:40:10,626 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 20:40:10,631 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 20:40:10,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 08:40:10" (1/2) ... [2018-09-30 20:40:10,633 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49cafb72 and model type count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 08:40:10, skipping insertion in model container [2018-09-30 20:40:10,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 08:40:10" (2/2) ... [2018-09-30 20:40:10,635 INFO L112 eAbstractionObserver]: Analyzing ICFG count_by_2.i_3.bpl [2018-09-30 20:40:10,646 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 20:40:10,654 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 20:40:10,714 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 20:40:10,715 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 20:40:10,715 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 20:40:10,715 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 20:40:10,715 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 20:40:10,716 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 20:40:10,716 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 20:40:10,716 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 20:40:10,716 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 20:40:10,734 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 20:40:10,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 20:40:10,752 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:10,753 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 20:40:10,755 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:10,767 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:10,767 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-30 20:40:10,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:10,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:10,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:10,827 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:10,827 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:10,927 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 20:40:10,927 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 20:40:10,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 20:40:10,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 20:40:10,945 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:10,948 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 20:40:11,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:11,069 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 20:40:11,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 20:40:11,071 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 20:40:11,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:11,085 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:40:11,085 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 20:40:11,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time [2018-09-30 20:40:11,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 20:40:11,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 20:40:11,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 20:40:11,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 20:40:11,151 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-30 20:40:11,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:11,151 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 20:40:11,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 20:40:11,151 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 20:40:11,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 20:40:11,152 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:11,152 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-30 20:40:11,152 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:11,153 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:11,153 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-30 20:40:11,153 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:11,153 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:11,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:11,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:11,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:11,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:11,209 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:11,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:11,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:11,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:11,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:11,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:11,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 20:40:11,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 20:40:11,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 20:40:11,466 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:11,466 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-30 20:40:11,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:11,682 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 20:40:11,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 20:40:11,684 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 20:40:11,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:11,685 INFO L225 Difference]: With dead ends: 11 [2018-09-30 20:40:11,685 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 20:40:11,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:40:11,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 20:40:11,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 20:40:11,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 20:40:11,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 20:40:11,689 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-30 20:40:11,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:11,689 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 20:40:11,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 20:40:11,690 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 20:40:11,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 20:40:11,690 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:11,690 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-30 20:40:11,691 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:11,691 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:11,691 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-30 20:40:11,691 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:11,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:11,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:11,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:11,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:11,789 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:11,789 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:11,805 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:40:11,820 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:40:11,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:11,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:11,890 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:11,890 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 20:40:11,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 20:40:11,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 20:40:11,891 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:11,891 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-30 20:40:12,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:12,055 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 20:40:12,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 20:40:12,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 20:40:12,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:12,057 INFO L225 Difference]: With dead ends: 13 [2018-09-30 20:40:12,057 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 20:40:12,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:40:12,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 20:40:12,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 20:40:12,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 20:40:12,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 20:40:12,062 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-30 20:40:12,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:12,062 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 20:40:12,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 20:40:12,063 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 20:40:12,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 20:40:12,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:12,063 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-30 20:40:12,064 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:12,064 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:12,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-30 20:40:12,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:12,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:12,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:12,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:12,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:12,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:12,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:12,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:40:12,324 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 20:40:12,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:12,326 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:12,446 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:12,447 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 20:40:12,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 20:40:12,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 20:40:12,448 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:12,448 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-30 20:40:12,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:12,542 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 20:40:12,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 20:40:12,544 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-30 20:40:12,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:12,544 INFO L225 Difference]: With dead ends: 15 [2018-09-30 20:40:12,544 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 20:40:12,545 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:40:12,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 20:40:12,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 20:40:12,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 20:40:12,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 20:40:12,548 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-30 20:40:12,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:12,549 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 20:40:12,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 20:40:12,549 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 20:40:12,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 20:40:12,550 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:12,550 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-30 20:40:12,550 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:12,551 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:12,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-30 20:40:12,551 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:12,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:12,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:12,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:12,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:12,647 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:12,648 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:12,661 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:40:12,696 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:40:12,697 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:12,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:12,837 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:12,837 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 20:40:12,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 20:40:12,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 20:40:12,838 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:12,839 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-30 20:40:12,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:12,898 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 20:40:12,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 20:40:12,898 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-30 20:40:12,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:12,899 INFO L225 Difference]: With dead ends: 17 [2018-09-30 20:40:12,900 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 20:40:12,900 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:40:12,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 20:40:12,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 20:40:12,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 20:40:12,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 20:40:12,905 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-30 20:40:12,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:12,906 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 20:40:12,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 20:40:12,906 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 20:40:12,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 20:40:12,908 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:12,908 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-30 20:40:12,908 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:12,908 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:12,908 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-30 20:40:12,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:12,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:12,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:12,910 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:12,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:13,018 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:13,018 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:13,026 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:40:13,037 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 20:40:13,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:13,040 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:13,129 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:13,129 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 20:40:13,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 20:40:13,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 20:40:13,130 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:13,130 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-30 20:40:13,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:13,622 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 20:40:13,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 20:40:13,626 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-30 20:40:13,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:13,627 INFO L225 Difference]: With dead ends: 19 [2018-09-30 20:40:13,627 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 20:40:13,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:40:13,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 20:40:13,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 20:40:13,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 20:40:13,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 20:40:13,631 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-30 20:40:13,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:13,632 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 20:40:13,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 20:40:13,632 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 20:40:13,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 20:40:13,633 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:13,633 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-30 20:40:13,633 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:13,633 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:13,633 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-30 20:40:13,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:13,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:13,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:13,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:13,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:13,736 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:13,737 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:13,737 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:13,751 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:40:13,780 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 20:40:13,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:13,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:13,853 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:13,853 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 20:40:13,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 20:40:13,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 20:40:13,854 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:13,854 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-30 20:40:14,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:14,042 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 20:40:14,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 20:40:14,043 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-30 20:40:14,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:14,044 INFO L225 Difference]: With dead ends: 21 [2018-09-30 20:40:14,044 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 20:40:14,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:40:14,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 20:40:14,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 20:40:14,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 20:40:14,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 20:40:14,049 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-30 20:40:14,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:14,049 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 20:40:14,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 20:40:14,049 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 20:40:14,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 20:40:14,050 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:14,050 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-30 20:40:14,050 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:14,051 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:14,051 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-30 20:40:14,051 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:14,051 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:14,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:14,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:14,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:14,153 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:14,153 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:14,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:14,170 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:14,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:14,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 20:40:14,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 20:40:14,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 20:40:14,285 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:14,285 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-30 20:40:14,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:14,447 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 20:40:14,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 20:40:14,452 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-30 20:40:14,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:14,453 INFO L225 Difference]: With dead ends: 23 [2018-09-30 20:40:14,453 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 20:40:14,454 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:40:14,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 20:40:14,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 20:40:14,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 20:40:14,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 20:40:14,458 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-30 20:40:14,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:14,458 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 20:40:14,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 20:40:14,459 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 20:40:14,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 20:40:14,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:14,460 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-30 20:40:14,460 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:14,460 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:14,460 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-30 20:40:14,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:14,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:14,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:14,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:14,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:14,613 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:14,613 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:14,629 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:40:14,660 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:40:14,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:14,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:14,787 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:14,788 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 20:40:14,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 20:40:14,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 20:40:14,789 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:14,789 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-30 20:40:14,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:14,931 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 20:40:14,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 20:40:14,931 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-30 20:40:14,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:14,932 INFO L225 Difference]: With dead ends: 25 [2018-09-30 20:40:14,932 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 20:40:14,933 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:40:14,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 20:40:14,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 20:40:14,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 20:40:14,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 20:40:14,937 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-30 20:40:14,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:14,938 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 20:40:14,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 20:40:14,938 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 20:40:14,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 20:40:14,939 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:14,939 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-30 20:40:14,939 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:14,939 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:14,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-30 20:40:14,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:14,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:14,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:14,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:14,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:15,094 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:15,094 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:15,104 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:40:15,133 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 20:40:15,134 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:15,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:15,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:15,235 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 20:40:15,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 20:40:15,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 20:40:15,235 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:15,235 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-30 20:40:15,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:15,328 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 20:40:15,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 20:40:15,330 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-30 20:40:15,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:15,331 INFO L225 Difference]: With dead ends: 27 [2018-09-30 20:40:15,331 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 20:40:15,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:40:15,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 20:40:15,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 20:40:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 20:40:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 20:40:15,336 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-30 20:40:15,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:15,337 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 20:40:15,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 20:40:15,337 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 20:40:15,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 20:40:15,337 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:15,338 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-30 20:40:15,338 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:15,338 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:15,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-30 20:40:15,338 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:15,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:15,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:15,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:15,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:15,448 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:15,449 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 [2018-09-30 20:40:15,458 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:40:15,468 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:40:15,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:15,471 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:15,589 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:15,590 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 20:40:15,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 20:40:15,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 20:40:15,590 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:15,591 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-30 20:40:15,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:15,668 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 20:40:15,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 20:40:15,669 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-30 20:40:15,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:15,670 INFO L225 Difference]: With dead ends: 29 [2018-09-30 20:40:15,671 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 20:40:15,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:40:15,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 20:40:15,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 20:40:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 20:40:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 20:40:15,678 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-30 20:40:15,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:15,682 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 20:40:15,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 20:40:15,682 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 20:40:15,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 20:40:15,683 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:15,683 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-30 20:40:15,683 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:15,683 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:15,683 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-30 20:40:15,683 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:15,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:15,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:15,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:15,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:15,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:15,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:15,842 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:40:15,874 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 20:40:15,874 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:15,877 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:15,976 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:15,976 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 20:40:15,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 20:40:15,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 20:40:15,977 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:15,978 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-30 20:40:16,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:16,219 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 20:40:16,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 20:40:16,223 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-30 20:40:16,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:16,224 INFO L225 Difference]: With dead ends: 31 [2018-09-30 20:40:16,224 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 20:40:16,224 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:40:16,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 20:40:16,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 20:40:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 20:40:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 20:40:16,229 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-30 20:40:16,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:16,229 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 20:40:16,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 20:40:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 20:40:16,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 20:40:16,230 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:16,230 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-30 20:40:16,231 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:16,231 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:16,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-30 20:40:16,231 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:16,231 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:16,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:16,232 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:16,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:16,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:16,390 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:16,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:16,397 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:40:16,414 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 20:40:16,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:16,416 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:16,634 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:16,634 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 20:40:16,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 20:40:16,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 20:40:16,635 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:16,636 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-30 20:40:16,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:16,778 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 20:40:16,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 20:40:16,781 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-30 20:40:16,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:16,782 INFO L225 Difference]: With dead ends: 33 [2018-09-30 20:40:16,782 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 20:40:16,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:40:16,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 20:40:16,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 20:40:16,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 20:40:16,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 20:40:16,787 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-30 20:40:16,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:16,787 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 20:40:16,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 20:40:16,787 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 20:40:16,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 20:40:16,788 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:16,788 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-30 20:40:16,789 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:16,789 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:16,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-30 20:40:16,789 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:16,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:16,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:16,790 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:16,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:16,913 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:16,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:16,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:16,933 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:17,066 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:17,087 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:17,088 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 20:40:17,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 20:40:17,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 20:40:17,088 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:17,089 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-30 20:40:17,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:17,288 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 20:40:17,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 20:40:17,290 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-30 20:40:17,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:17,291 INFO L225 Difference]: With dead ends: 35 [2018-09-30 20:40:17,291 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 20:40:17,292 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:40:17,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 20:40:17,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 20:40:17,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 20:40:17,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 20:40:17,296 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-30 20:40:17,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:17,297 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 20:40:17,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 20:40:17,297 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 20:40:17,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 20:40:17,298 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:17,298 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-30 20:40:17,298 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:17,298 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:17,298 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-30 20:40:17,298 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:17,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:17,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:17,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:17,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:17,410 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:17,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:17,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:17,425 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:40:17,437 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:40:17,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:17,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:17,528 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:17,549 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:17,549 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 20:40:17,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 20:40:17,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 20:40:17,550 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:17,550 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-30 20:40:17,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:17,671 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 20:40:17,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 20:40:17,672 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-30 20:40:17,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:17,673 INFO L225 Difference]: With dead ends: 37 [2018-09-30 20:40:17,673 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 20:40:17,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time [2018-09-30 20:40:17,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 20:40:17,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 20:40:17,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 20:40:17,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 20:40:17,678 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-30 20:40:17,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:17,678 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 20:40:17,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 20:40:17,678 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 20:40:17,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 20:40:17,679 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:17,679 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-30 20:40:17,680 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:17,680 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:17,680 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-30 20:40:17,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:17,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:17,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:17,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:17,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:17,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:17,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:17,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:17,858 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:40:17,894 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 20:40:17,895 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:17,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:18,063 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:18,063 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 20:40:18,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 20:40:18,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 20:40:18,064 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:18,064 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-30 20:40:18,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:18,398 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 20:40:18,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 20:40:18,401 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-30 20:40:18,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:18,401 INFO L225 Difference]: With dead ends: 39 [2018-09-30 20:40:18,402 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 20:40:18,402 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:40:18,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 20:40:18,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 20:40:18,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 20:40:18,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 20:40:18,408 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-30 20:40:18,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:18,408 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 20:40:18,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 20:40:18,408 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 20:40:18,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 20:40:18,409 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:18,409 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-30 20:40:18,409 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:18,410 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:18,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-30 20:40:18,410 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:18,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:18,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:18,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:18,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:18,632 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:18,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:18,639 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:40:18,655 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:40:18,656 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:18,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:18,829 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:18,862 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:18,862 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 20:40:18,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 20:40:18,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 20:40:18,863 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:18,864 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-30 20:40:19,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:19,094 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 20:40:19,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 20:40:19,096 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-30 20:40:19,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:19,096 INFO L225 Difference]: With dead ends: 41 [2018-09-30 20:40:19,096 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 20:40:19,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:40:19,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 20:40:19,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 20:40:19,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 20:40:19,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 20:40:19,102 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-30 20:40:19,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:19,103 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 20:40:19,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 20:40:19,103 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 20:40:19,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 20:40:19,104 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:19,104 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-30 20:40:19,104 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:19,104 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:19,104 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-30 20:40:19,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:19,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:19,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:19,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:19,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:19,408 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:19,408 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:19,416 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:40:19,437 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 20:40:19,438 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:19,439 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:19,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:19,787 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 20:40:19,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 20:40:19,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 20:40:19,787 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:19,787 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-30 20:40:19,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:19,936 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 20:40:19,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 20:40:19,936 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-30 20:40:19,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:19,937 INFO L225 Difference]: With dead ends: 43 [2018-09-30 20:40:19,937 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 20:40:19,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:40:19,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 20:40:19,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 20:40:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 20:40:19,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 20:40:19,943 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-30 20:40:19,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:19,944 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 20:40:19,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 20:40:19,944 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 20:40:19,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 20:40:19,945 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:19,945 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-30 20:40:19,945 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:19,945 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:19,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-30 20:40:19,946 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:19,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:19,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:19,947 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:19,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:20,302 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:20,302 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:20,310 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:40:20,348 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 20:40:20,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:20,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:20,572 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:20,572 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 20:40:20,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 20:40:20,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 20:40:20,573 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:20,573 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-30 20:40:21,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:21,022 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 20:40:21,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 20:40:21,023 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-30 20:40:21,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:21,023 INFO L225 Difference]: With dead ends: 45 [2018-09-30 20:40:21,024 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 20:40:21,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:40:21,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 20:40:21,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 20:40:21,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 20:40:21,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 20:40:21,028 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-30 20:40:21,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:21,029 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 20:40:21,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 20:40:21,029 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 20:40:21,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 20:40:21,029 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:21,030 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-30 20:40:21,030 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:21,030 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:21,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-30 20:40:21,030 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:21,030 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:21,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:21,031 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:21,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:21,819 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:21,819 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:21,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:21,842 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:21,964 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:21,964 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 20:40:21,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 20:40:21,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 20:40:21,965 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:21,965 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-30 20:40:22,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:22,113 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 20:40:22,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 20:40:22,114 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-30 20:40:22,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:22,115 INFO L225 Difference]: With dead ends: 47 [2018-09-30 20:40:22,115 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 20:40:22,115 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:40:22,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 20:40:22,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 20:40:22,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 20:40:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 20:40:22,122 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-30 20:40:22,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:22,122 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 20:40:22,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 20:40:22,122 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 20:40:22,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 20:40:22,123 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:22,123 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-30 20:40:22,123 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:22,123 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:22,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-30 20:40:22,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:22,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:22,124 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:22,125 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:22,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:22,376 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:22,376 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:22,389 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:40:22,401 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:40:22,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:22,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:22,534 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:22,534 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 20:40:22,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 20:40:22,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 20:40:22,535 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:22,535 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-30 20:40:22,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:22,670 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 20:40:22,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 20:40:22,671 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-30 20:40:22,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:22,672 INFO L225 Difference]: With dead ends: 49 [2018-09-30 20:40:22,672 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 20:40:22,672 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:40:22,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 20:40:22,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 20:40:22,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 20:40:22,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 20:40:22,678 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-30 20:40:22,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:22,678 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 20:40:22,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 20:40:22,678 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 20:40:22,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 20:40:22,679 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:22,679 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-30 20:40:22,679 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:22,680 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:22,680 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-30 20:40:22,680 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:22,680 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:22,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:22,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:22,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:22,858 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:22,858 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:22,865 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:40:22,886 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 20:40:22,886 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:22,888 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:23,018 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:23,018 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 20:40:23,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 20:40:23,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 20:40:23,019 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:23,019 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-30 20:40:23,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:23,174 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 20:40:23,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 20:40:23,177 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-30 20:40:23,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:23,177 INFO L225 Difference]: With dead ends: 51 [2018-09-30 20:40:23,178 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 20:40:23,178 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:40:23,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 20:40:23,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 20:40:23,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 20:40:23,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 20:40:23,182 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-30 20:40:23,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:23,183 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 20:40:23,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 20:40:23,183 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 20:40:23,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 20:40:23,183 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:23,184 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-30 20:40:23,184 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:23,184 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:23,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-30 20:40:23,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:23,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:23,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:23,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:23,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:23,365 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:23,365 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:23,373 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:40:23,392 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:40:23,392 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:23,394 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:23,538 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:23,538 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 20:40:23,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 20:40:23,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 20:40:23,539 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:23,540 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-30 20:40:23,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:23,675 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 20:40:23,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 20:40:23,675 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-30 20:40:23,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:23,676 INFO L225 Difference]: With dead ends: 53 [2018-09-30 20:40:23,676 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 20:40:23,677 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:40:23,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 20:40:23,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 20:40:23,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 20:40:23,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 20:40:23,683 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-30 20:40:23,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:23,684 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 20:40:23,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 20:40:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 20:40:23,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 20:40:23,685 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:23,685 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-30 20:40:23,685 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:23,685 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:23,686 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-30 20:40:23,686 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:23,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:23,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:23,687 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:23,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:23,976 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:23,977 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:23,987 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:40:24,041 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 20:40:24,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:24,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:24,244 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:24,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 20:40:24,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 20:40:24,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 20:40:24,245 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:24,245 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-30 20:40:24,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:24,332 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 20:40:24,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 20:40:24,332 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-30 20:40:24,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:24,333 INFO L225 Difference]: With dead ends: 55 [2018-09-30 20:40:24,333 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 20:40:24,334 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:40:24,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 20:40:24,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 20:40:24,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 20:40:24,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 20:40:24,336 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-30 20:40:24,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:24,337 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 20:40:24,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 20:40:24,337 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 20:40:24,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 20:40:24,337 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:24,337 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-30 20:40:24,339 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:24,340 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:24,340 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-30 20:40:24,340 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:24,340 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:24,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:24,341 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:24,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:24,585 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:24,585 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:24,593 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:40:24,616 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-09-30 20:40:24,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:24,618 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:24,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:24,854 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-30 20:40:24,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-30 20:40:24,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-30 20:40:24,855 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:24,855 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2018-09-30 20:40:24,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:24,990 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-09-30 20:40:24,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-30 20:40:24,990 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2018-09-30 20:40:24,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:24,991 INFO L225 Difference]: With dead ends: 57 [2018-09-30 20:40:24,991 INFO L226 Difference]: Without dead ends: 55 [2018-09-30 20:40:24,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:40:24,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-30 20:40:24,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-09-30 20:40:24,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-09-30 20:40:24,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-09-30 20:40:24,996 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2018-09-30 20:40:24,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:24,997 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-09-30 20:40:24,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-30 20:40:24,997 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-09-30 20:40:24,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-09-30 20:40:24,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:24,998 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1] [2018-09-30 20:40:24,998 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:24,998 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:24,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1351680241, now seen corresponding path program 25 times [2018-09-30 20:40:24,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:24,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:24,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:24,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:24,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:25,483 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:25,483 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:25,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:25,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:25,678 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:25,678 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-30 20:40:25,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-30 20:40:25,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-30 20:40:25,679 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:25,679 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2018-09-30 20:40:25,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:25,849 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-09-30 20:40:25,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-30 20:40:25,849 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2018-09-30 20:40:25,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:25,850 INFO L225 Difference]: With dead ends: 59 [2018-09-30 20:40:25,850 INFO L226 Difference]: Without dead ends: 57 [2018-09-30 20:40:25,851 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:40:25,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-09-30 20:40:25,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-09-30 20:40:25,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-09-30 20:40:25,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-09-30 20:40:25,854 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2018-09-30 20:40:25,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:25,855 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-09-30 20:40:25,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-30 20:40:25,855 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-09-30 20:40:25,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-09-30 20:40:25,856 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:25,856 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1] [2018-09-30 20:40:25,856 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:25,856 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:25,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1884640299, now seen corresponding path program 26 times [2018-09-30 20:40:25,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:25,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:25,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:25,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:25,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:26,038 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:26,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:26,045 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:40:26,060 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:40:26,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:26,062 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:26,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:26,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-30 20:40:26,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-30 20:40:26,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-30 20:40:26,235 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:26,235 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2018-09-30 20:40:26,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:26,419 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-09-30 20:40:26,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-30 20:40:26,420 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2018-09-30 20:40:26,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:26,420 INFO L225 Difference]: With dead ends: 61 [2018-09-30 20:40:26,421 INFO L226 Difference]: Without dead ends: 59 [2018-09-30 20:40:26,421 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time [2018-09-30 20:40:26,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-09-30 20:40:26,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-09-30 20:40:26,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-09-30 20:40:26,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-09-30 20:40:26,424 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2018-09-30 20:40:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:26,424 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-09-30 20:40:26,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-30 20:40:26,425 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-09-30 20:40:26,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-09-30 20:40:26,425 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:26,425 INFO L375 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1] [2018-09-30 20:40:26,426 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:26,426 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:26,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1336819483, now seen corresponding path program 27 times [2018-09-30 20:40:26,426 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:26,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:26,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:26,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:26,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:26,686 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:26,686 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:26,693 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:40:26,723 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-09-30 20:40:26,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:26,725 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:26,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:26,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-30 20:40:26,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-30 20:40:26,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-30 20:40:26,882 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:26,882 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2018-09-30 20:40:27,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:27,061 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-09-30 20:40:27,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-30 20:40:27,062 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2018-09-30 20:40:27,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:27,062 INFO L225 Difference]: With dead ends: 63 [2018-09-30 20:40:27,062 INFO L226 Difference]: Without dead ends: 61 [2018-09-30 20:40:27,063 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:40:27,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-09-30 20:40:27,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-09-30 20:40:27,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-09-30 20:40:27,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-09-30 20:40:27,066 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2018-09-30 20:40:27,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:27,066 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-09-30 20:40:27,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-30 20:40:27,066 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-09-30 20:40:27,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-09-30 20:40:27,067 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:27,067 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1] [2018-09-30 20:40:27,067 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:27,068 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:27,068 INFO L82 PathProgramCache]: Analyzing trace with hash -488249569, now seen corresponding path program 28 times [2018-09-30 20:40:27,068 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:27,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:27,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:27,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:27,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:27,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:27,409 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:27,409 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:27,419 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:40:27,436 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:40:27,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:27,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:27,555 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:27,555 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-30 20:40:27,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-30 20:40:27,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-30 20:40:27,556 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:27,556 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2018-09-30 20:40:27,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:27,837 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-09-30 20:40:27,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-30 20:40:27,837 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2018-09-30 20:40:27,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:27,838 INFO L225 Difference]: With dead ends: 65 [2018-09-30 20:40:27,838 INFO L226 Difference]: Without dead ends: 63 [2018-09-30 20:40:27,839 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:40:27,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-30 20:40:27,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-09-30 20:40:27,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-09-30 20:40:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-09-30 20:40:27,842 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2018-09-30 20:40:27,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:27,843 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-09-30 20:40:27,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-30 20:40:27,843 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-09-30 20:40:27,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-09-30 20:40:27,843 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:27,843 INFO L375 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1] [2018-09-30 20:40:27,844 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:27,844 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:27,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1056348455, now seen corresponding path program 29 times [2018-09-30 20:40:27,844 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:27,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:27,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:27,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:27,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:28,082 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:28,083 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:28,083 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:28,099 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:40:28,130 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-09-30 20:40:28,130 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:28,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:28,272 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:28,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-30 20:40:28,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-30 20:40:28,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-30 20:40:28,273 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:28,274 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2018-09-30 20:40:28,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:28,410 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-09-30 20:40:28,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-30 20:40:28,411 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2018-09-30 20:40:28,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:28,412 INFO L225 Difference]: With dead ends: 67 [2018-09-30 20:40:28,412 INFO L226 Difference]: Without dead ends: 65 [2018-09-30 20:40:28,412 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:40:28,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-09-30 20:40:28,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-09-30 20:40:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-09-30 20:40:28,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-09-30 20:40:28,416 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2018-09-30 20:40:28,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:28,416 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-09-30 20:40:28,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-30 20:40:28,416 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-09-30 20:40:28,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-09-30 20:40:28,416 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:28,416 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1] [2018-09-30 20:40:28,417 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:28,417 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:28,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1538531309, now seen corresponding path program 30 times [2018-09-30 20:40:28,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:28,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:28,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:28,418 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:28,418 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:28,628 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:28,629 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:28,629 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:28,640 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:40:28,672 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-09-30 20:40:28,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:28,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:28,837 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:28,838 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-30 20:40:28,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-30 20:40:28,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-30 20:40:28,838 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:28,838 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2018-09-30 20:40:28,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:28,971 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-09-30 20:40:28,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-30 20:40:28,972 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2018-09-30 20:40:28,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:28,973 INFO L225 Difference]: With dead ends: 69 [2018-09-30 20:40:28,973 INFO L226 Difference]: Without dead ends: 67 [2018-09-30 20:40:28,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:40:28,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-09-30 20:40:28,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-09-30 20:40:28,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-09-30 20:40:28,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-09-30 20:40:28,976 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2018-09-30 20:40:28,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:28,976 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-09-30 20:40:28,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-30 20:40:28,977 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-09-30 20:40:28,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-09-30 20:40:28,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:28,977 INFO L375 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1] [2018-09-30 20:40:28,978 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:28,978 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:28,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1059786035, now seen corresponding path program 31 times [2018-09-30 20:40:28,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:28,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:28,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:28,979 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:28,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:29,253 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:29,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:29,273 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:29,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 0 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:29,550 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:29,550 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-30 20:40:29,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-30 20:40:29,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-30 20:40:29,551 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:29,551 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2018-09-30 20:40:29,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:29,690 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-09-30 20:40:29,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-30 20:40:29,691 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2018-09-30 20:40:29,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:29,692 INFO L225 Difference]: With dead ends: 71 [2018-09-30 20:40:29,692 INFO L226 Difference]: Without dead ends: 69 [2018-09-30 20:40:29,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:40:29,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-09-30 20:40:29,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-09-30 20:40:29,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-09-30 20:40:29,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-09-30 20:40:29,696 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2018-09-30 20:40:29,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:29,696 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-09-30 20:40:29,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-30 20:40:29,696 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-09-30 20:40:29,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-09-30 20:40:29,697 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:29,697 INFO L375 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1] [2018-09-30 20:40:29,697 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:29,697 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:29,697 INFO L82 PathProgramCache]: Analyzing trace with hash -547078393, now seen corresponding path program 32 times [2018-09-30 20:40:29,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:29,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:29,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:29,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:29,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:29,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:29,946 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:29,946 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:29,953 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:40:29,971 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:40:29,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:29,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1056 backedges. 0 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:30,092 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:30,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-30 20:40:30,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-30 20:40:30,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-30 20:40:30,093 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:30,093 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2018-09-30 20:40:30,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:30,468 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-09-30 20:40:30,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-30 20:40:30,468 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2018-09-30 20:40:30,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:30,469 INFO L225 Difference]: With dead ends: 73 [2018-09-30 20:40:30,469 INFO L226 Difference]: Without dead ends: 71 [2018-09-30 20:40:30,469 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:40:30,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-09-30 20:40:30,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-09-30 20:40:30,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-09-30 20:40:30,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-09-30 20:40:30,472 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2018-09-30 20:40:30,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:30,473 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-09-30 20:40:30,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-30 20:40:30,473 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-09-30 20:40:30,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-09-30 20:40:30,473 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:30,473 INFO L375 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1] [2018-09-30 20:40:30,474 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:30,474 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:30,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1756273471, now seen corresponding path program 33 times [2018-09-30 20:40:30,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:30,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:30,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:30,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:30,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:30,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:31,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:31,291 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:31,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:31,299 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:40:31,327 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-09-30 20:40:31,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:31,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:31,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:31,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:31,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-30 20:40:31,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-30 20:40:31,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-30 20:40:31,459 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:31,459 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2018-09-30 20:40:31,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:31,621 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-09-30 20:40:31,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-30 20:40:31,622 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2018-09-30 20:40:31,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:31,623 INFO L225 Difference]: With dead ends: 75 [2018-09-30 20:40:31,623 INFO L226 Difference]: Without dead ends: 73 [2018-09-30 20:40:31,623 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:40:31,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-09-30 20:40:31,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-09-30 20:40:31,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-30 20:40:31,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-09-30 20:40:31,627 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2018-09-30 20:40:31,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:31,627 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-09-30 20:40:31,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-30 20:40:31,627 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-09-30 20:40:31,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-09-30 20:40:31,628 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:31,628 INFO L375 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1] [2018-09-30 20:40:31,628 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:31,628 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:31,628 INFO L82 PathProgramCache]: Analyzing trace with hash 143393787, now seen corresponding path program 34 times [2018-09-30 20:40:31,629 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:31,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:31,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:31,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:31,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:31,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:31,963 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:31,963 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:31,970 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:40:31,989 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:40:31,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:31,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:32,118 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:32,119 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-30 20:40:32,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-30 20:40:32,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-30 20:40:32,119 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:32,119 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2018-09-30 20:40:32,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:32,375 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-09-30 20:40:32,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-30 20:40:32,375 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2018-09-30 20:40:32,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:32,376 INFO L225 Difference]: With dead ends: 77 [2018-09-30 20:40:32,376 INFO L226 Difference]: Without dead ends: 75 [2018-09-30 20:40:32,377 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:40:32,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-09-30 20:40:32,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-09-30 20:40:32,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-09-30 20:40:32,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-09-30 20:40:32,381 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2018-09-30 20:40:32,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:32,381 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-09-30 20:40:32,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-30 20:40:32,381 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-09-30 20:40:32,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-09-30 20:40:32,382 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:32,382 INFO L375 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1] [2018-09-30 20:40:32,382 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:32,382 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:32,382 INFO L82 PathProgramCache]: Analyzing trace with hash 362527925, now seen corresponding path program 35 times [2018-09-30 20:40:32,382 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:32,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:32,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:32,383 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:32,383 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:32,619 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:32,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:32,627 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:40:32,657 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-30 20:40:32,657 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:32,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:33,252 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:33,252 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-30 20:40:33,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-30 20:40:33,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-30 20:40:33,253 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:33,253 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2018-09-30 20:40:33,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:33,449 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-09-30 20:40:33,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-30 20:40:33,450 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2018-09-30 20:40:33,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:33,451 INFO L225 Difference]: With dead ends: 79 [2018-09-30 20:40:33,451 INFO L226 Difference]: Without dead ends: 77 [2018-09-30 20:40:33,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:33,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-09-30 20:40:33,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-09-30 20:40:33,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-30 20:40:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-09-30 20:40:33,453 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2018-09-30 20:40:33,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:33,454 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-09-30 20:40:33,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-30 20:40:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-09-30 20:40:33,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-30 20:40:33,454 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:33,454 INFO L375 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1] [2018-09-30 20:40:33,454 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:33,455 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:33,455 INFO L82 PathProgramCache]: Analyzing trace with hash 497037039, now seen corresponding path program 36 times [2018-09-30 20:40:33,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:33,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:33,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:33,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:33,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:33,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:33,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:33,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:33,697 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:40:33,731 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-09-30 20:40:33,731 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:33,733 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 0 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:33,902 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:33,902 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-30 20:40:33,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-30 20:40:33,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-30 20:40:33,903 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:33,903 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2018-09-30 20:40:34,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:34,128 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-09-30 20:40:34,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-30 20:40:34,129 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2018-09-30 20:40:34,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:34,130 INFO L225 Difference]: With dead ends: 81 [2018-09-30 20:40:34,130 INFO L226 Difference]: Without dead ends: 79 [2018-09-30 20:40:34,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:40:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-09-30 20:40:34,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-09-30 20:40:34,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-09-30 20:40:34,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-09-30 20:40:34,132 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2018-09-30 20:40:34,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:34,132 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-09-30 20:40:34,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-30 20:40:34,133 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-09-30 20:40:34,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-09-30 20:40:34,133 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:34,133 INFO L375 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1] [2018-09-30 20:40:34,134 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:34,134 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:34,134 INFO L82 PathProgramCache]: Analyzing trace with hash 911276713, now seen corresponding path program 37 times [2018-09-30 20:40:34,134 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:34,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:34,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:34,135 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:34,135 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:34,482 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:34,482 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:34,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:34,513 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:34,693 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:34,693 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-30 20:40:34,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-30 20:40:34,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-30 20:40:34,694 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:34,694 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2018-09-30 20:40:34,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:34,969 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-09-30 20:40:34,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-30 20:40:34,969 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2018-09-30 20:40:34,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:34,970 INFO L225 Difference]: With dead ends: 83 [2018-09-30 20:40:34,970 INFO L226 Difference]: Without dead ends: 81 [2018-09-30 20:40:34,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:40:34,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-09-30 20:40:34,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-09-30 20:40:34,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-09-30 20:40:34,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-09-30 20:40:34,973 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2018-09-30 20:40:34,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:34,974 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-09-30 20:40:34,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-30 20:40:34,974 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-09-30 20:40:34,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-09-30 20:40:34,974 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:34,974 INFO L375 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1] [2018-09-30 20:40:34,975 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:34,975 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:34,975 INFO L82 PathProgramCache]: Analyzing trace with hash -436355101, now seen corresponding path program 38 times [2018-09-30 20:40:34,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:34,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:34,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:34,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:34,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:35,294 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:35,294 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:35,304 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:40:35,323 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:40:35,324 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:35,325 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 0 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:35,685 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:35,685 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-30 20:40:35,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-30 20:40:35,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-30 20:40:35,686 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:35,686 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2018-09-30 20:40:35,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:35,959 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-09-30 20:40:35,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-30 20:40:35,959 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2018-09-30 20:40:35,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:35,960 INFO L225 Difference]: With dead ends: 85 [2018-09-30 20:40:35,960 INFO L226 Difference]: Without dead ends: 83 [2018-09-30 20:40:35,960 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:40:35,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-09-30 20:40:35,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-09-30 20:40:35,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-09-30 20:40:35,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-09-30 20:40:35,963 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2018-09-30 20:40:35,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:35,963 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-09-30 20:40:35,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-30 20:40:35,964 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-09-30 20:40:35,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-09-30 20:40:35,964 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:35,964 INFO L375 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1] [2018-09-30 20:40:35,964 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:35,965 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:35,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1569595037, now seen corresponding path program 39 times [2018-09-30 20:40:35,965 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:35,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:35,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:35,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:35,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:36,300 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:36,300 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:36,308 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:40:36,347 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-09-30 20:40:36,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:36,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 0 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:36,526 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:36,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-30 20:40:36,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-30 20:40:36,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-30 20:40:36,526 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:36,527 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2018-09-30 20:40:36,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:36,836 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-09-30 20:40:36,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-30 20:40:36,837 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2018-09-30 20:40:36,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:36,838 INFO L225 Difference]: With dead ends: 87 [2018-09-30 20:40:36,838 INFO L226 Difference]: Without dead ends: 85 [2018-09-30 20:40:36,838 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:40:36,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-30 20:40:36,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-30 20:40:36,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-30 20:40:36,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-09-30 20:40:36,841 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2018-09-30 20:40:36,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:36,841 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-09-30 20:40:36,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-30 20:40:36,842 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-09-30 20:40:36,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-30 20:40:36,842 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:36,842 INFO L375 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1] [2018-09-30 20:40:36,843 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:36,843 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:36,843 INFO L82 PathProgramCache]: Analyzing trace with hash 847361751, now seen corresponding path program 40 times [2018-09-30 20:40:36,843 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:36,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:36,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:36,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:36,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:37,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:37,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:37,134 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:40:37,156 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:40:37,156 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:37,158 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:37,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:37,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-30 20:40:37,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-30 20:40:37,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-30 20:40:37,308 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:37,309 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2018-09-30 20:40:37,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:37,638 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-09-30 20:40:37,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-30 20:40:37,638 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2018-09-30 20:40:37,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:37,639 INFO L225 Difference]: With dead ends: 89 [2018-09-30 20:40:37,639 INFO L226 Difference]: Without dead ends: 87 [2018-09-30 20:40:37,639 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time [2018-09-30 20:40:37,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-09-30 20:40:37,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-09-30 20:40:37,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-09-30 20:40:37,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-09-30 20:40:37,643 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2018-09-30 20:40:37,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:37,643 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-09-30 20:40:37,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-30 20:40:37,643 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-09-30 20:40:37,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-09-30 20:40:37,644 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:37,644 INFO L375 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1] [2018-09-30 20:40:37,644 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:37,644 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:37,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1729091439, now seen corresponding path program 41 times [2018-09-30 20:40:37,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:37,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:37,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:37,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:37,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:38,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:38,195 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:38,195 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:38,204 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:40:38,241 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-09-30 20:40:38,241 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:38,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 0 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:38,449 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:38,449 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-30 20:40:38,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-30 20:40:38,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-30 20:40:38,450 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:38,450 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2018-09-30 20:40:38,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:38,703 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-09-30 20:40:38,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-30 20:40:38,703 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2018-09-30 20:40:38,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:38,704 INFO L225 Difference]: With dead ends: 91 [2018-09-30 20:40:38,704 INFO L226 Difference]: Without dead ends: 89 [2018-09-30 20:40:38,704 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:40:38,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-09-30 20:40:38,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-09-30 20:40:38,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-09-30 20:40:38,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-09-30 20:40:38,708 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2018-09-30 20:40:38,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:38,708 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-09-30 20:40:38,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-30 20:40:38,709 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-09-30 20:40:38,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-09-30 20:40:38,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:38,709 INFO L375 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1] [2018-09-30 20:40:38,709 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:38,710 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:38,710 INFO L82 PathProgramCache]: Analyzing trace with hash 495522763, now seen corresponding path program 42 times [2018-09-30 20:40:38,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:38,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:38,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:38,711 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:38,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:39,122 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:39,122 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:39,130 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:40:39,165 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-09-30 20:40:39,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:39,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1806 backedges. 0 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:39,347 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:39,348 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-30 20:40:39,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-30 20:40:39,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-30 20:40:39,349 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:39,349 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2018-09-30 20:40:39,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:39,520 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-09-30 20:40:39,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-30 20:40:39,520 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2018-09-30 20:40:39,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:39,521 INFO L225 Difference]: With dead ends: 93 [2018-09-30 20:40:39,521 INFO L226 Difference]: Without dead ends: 91 [2018-09-30 20:40:39,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:40:39,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-09-30 20:40:39,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-09-30 20:40:39,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-09-30 20:40:39,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-09-30 20:40:39,525 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2018-09-30 20:40:39,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:39,525 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-09-30 20:40:39,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-30 20:40:39,525 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-09-30 20:40:39,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-09-30 20:40:39,526 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:39,526 INFO L375 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1] [2018-09-30 20:40:39,526 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:39,526 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:39,527 INFO L82 PathProgramCache]: Analyzing trace with hash -543942523, now seen corresponding path program 43 times [2018-09-30 20:40:39,527 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:39,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:39,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:39,527 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:39,527 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:39,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:39,891 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:39,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:39,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:40,111 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:40,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-30 20:40:40,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-30 20:40:40,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-30 20:40:40,112 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:40,112 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2018-09-30 20:40:40,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:40,421 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-09-30 20:40:40,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-30 20:40:40,421 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2018-09-30 20:40:40,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:40,422 INFO L225 Difference]: With dead ends: 95 [2018-09-30 20:40:40,422 INFO L226 Difference]: Without dead ends: 93 [2018-09-30 20:40:40,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:40:40,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-30 20:40:40,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-30 20:40:40,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-30 20:40:40,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-09-30 20:40:40,426 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2018-09-30 20:40:40,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:40,426 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-09-30 20:40:40,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-30 20:40:40,426 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-09-30 20:40:40,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-30 20:40:40,427 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:40,427 INFO L375 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1] [2018-09-30 20:40:40,427 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:40,427 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:40,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1257297599, now seen corresponding path program 44 times [2018-09-30 20:40:40,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:40,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:40,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:40,428 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:40,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:40,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:40,882 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:40,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:40,892 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:40:40,918 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:40:40,918 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:40,920 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 0 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:41,267 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:41,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-30 20:40:41,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-30 20:40:41,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-30 20:40:41,268 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:41,268 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2018-09-30 20:40:41,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:41,818 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-09-30 20:40:41,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-30 20:40:41,818 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2018-09-30 20:40:41,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:41,819 INFO L225 Difference]: With dead ends: 97 [2018-09-30 20:40:41,820 INFO L226 Difference]: Without dead ends: 95 [2018-09-30 20:40:41,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:41,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-09-30 20:40:41,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-09-30 20:40:41,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-09-30 20:40:41,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-09-30 20:40:41,824 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2018-09-30 20:40:41,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:41,824 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-09-30 20:40:41,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-30 20:40:41,824 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-09-30 20:40:41,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-09-30 20:40:41,825 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:41,825 INFO L375 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1] [2018-09-30 20:40:41,825 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:41,825 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:41,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1377234553, now seen corresponding path program 45 times [2018-09-30 20:40:41,825 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:41,825 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:41,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:41,826 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:41,826 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:42,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:42,129 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:42,129 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:42,137 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:40:42,177 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-09-30 20:40:42,177 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:42,179 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 0 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:42,397 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:42,397 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-30 20:40:42,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-30 20:40:42,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-30 20:40:42,398 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:42,398 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2018-09-30 20:40:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:42,640 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-09-30 20:40:42,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-30 20:40:42,640 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2018-09-30 20:40:42,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:42,642 INFO L225 Difference]: With dead ends: 99 [2018-09-30 20:40:42,642 INFO L226 Difference]: Without dead ends: 97 [2018-09-30 20:40:42,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:40:42,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-30 20:40:42,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-09-30 20:40:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-09-30 20:40:42,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-09-30 20:40:42,646 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2018-09-30 20:40:42,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:42,647 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-09-30 20:40:42,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-30 20:40:42,647 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-09-30 20:40:42,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-09-30 20:40:42,647 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:42,647 INFO L375 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1] [2018-09-30 20:40:42,648 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:42,648 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:42,648 INFO L82 PathProgramCache]: Analyzing trace with hash 672530355, now seen corresponding path program 46 times [2018-09-30 20:40:42,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:42,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:42,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:42,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:42,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:43,520 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:43,520 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:43,528 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:40:43,554 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:40:43,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:43,556 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:43,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:43,764 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:43,764 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-30 20:40:43,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-30 20:40:43,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-30 20:40:43,765 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:43,765 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2018-09-30 20:40:44,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:44,045 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-09-30 20:40:44,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-30 20:40:44,046 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2018-09-30 20:40:44,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:44,047 INFO L225 Difference]: With dead ends: 101 [2018-09-30 20:40:44,047 INFO L226 Difference]: Without dead ends: 99 [2018-09-30 20:40:44,047 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:40:44,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-30 20:40:44,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-09-30 20:40:44,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-09-30 20:40:44,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-09-30 20:40:44,050 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2018-09-30 20:40:44,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:44,050 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-09-30 20:40:44,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-30 20:40:44,050 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-09-30 20:40:44,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-09-30 20:40:44,051 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:44,051 INFO L375 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1] [2018-09-30 20:40:44,051 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:44,051 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:44,051 INFO L82 PathProgramCache]: Analyzing trace with hash 2056628845, now seen corresponding path program 47 times [2018-09-30 20:40:44,052 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:44,052 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:44,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:44,052 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:44,052 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:44,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:44,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:44,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:44,565 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:40:44,607 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-09-30 20:40:44,607 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:44,610 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 0 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:44,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:44,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-30 20:40:44,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-30 20:40:44,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-30 20:40:44,787 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:44,787 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2018-09-30 20:40:45,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:45,023 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-09-30 20:40:45,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-30 20:40:45,023 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2018-09-30 20:40:45,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:45,024 INFO L225 Difference]: With dead ends: 103 [2018-09-30 20:40:45,024 INFO L226 Difference]: Without dead ends: 101 [2018-09-30 20:40:45,024 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:40:45,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-30 20:40:45,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-30 20:40:45,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-30 20:40:45,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-09-30 20:40:45,027 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2018-09-30 20:40:45,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:45,028 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-09-30 20:40:45,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-30 20:40:45,028 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-09-30 20:40:45,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-30 20:40:45,029 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:45,029 INFO L375 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1] [2018-09-30 20:40:45,029 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:45,029 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:45,029 INFO L82 PathProgramCache]: Analyzing trace with hash 735415975, now seen corresponding path program 48 times [2018-09-30 20:40:45,029 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:45,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:45,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:45,030 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:45,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:45,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:45,447 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:45,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:45,456 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:40:45,497 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-09-30 20:40:45,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:45,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2352 backedges. 0 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:45,807 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:45,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-30 20:40:45,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-30 20:40:45,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-30 20:40:45,808 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:45,808 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2018-09-30 20:40:46,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:46,137 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-09-30 20:40:46,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-30 20:40:46,138 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2018-09-30 20:40:46,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:46,139 INFO L225 Difference]: With dead ends: 105 [2018-09-30 20:40:46,139 INFO L226 Difference]: Without dead ends: 103 [2018-09-30 20:40:46,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:40:46,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-09-30 20:40:46,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-09-30 20:40:46,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-09-30 20:40:46,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-09-30 20:40:46,144 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2018-09-30 20:40:46,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:46,145 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-09-30 20:40:46,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-30 20:40:46,145 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-09-30 20:40:46,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-09-30 20:40:46,145 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:46,145 INFO L375 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1] [2018-09-30 20:40:46,146 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:46,146 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:46,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1934799775, now seen corresponding path program 49 times [2018-09-30 20:40:46,146 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:46,146 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:46,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:46,147 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:46,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:46,534 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:46,534 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:46,541 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:46,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:46,752 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:46,752 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-30 20:40:46,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-30 20:40:46,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-30 20:40:46,752 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:46,753 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2018-09-30 20:40:47,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:47,007 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-09-30 20:40:47,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-30 20:40:47,008 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2018-09-30 20:40:47,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:47,009 INFO L225 Difference]: With dead ends: 107 [2018-09-30 20:40:47,009 INFO L226 Difference]: Without dead ends: 105 [2018-09-30 20:40:47,009 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:40:47,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-09-30 20:40:47,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-09-30 20:40:47,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-09-30 20:40:47,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-09-30 20:40:47,013 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2018-09-30 20:40:47,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:47,013 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-09-30 20:40:47,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-30 20:40:47,013 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-09-30 20:40:47,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-09-30 20:40:47,014 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:47,014 INFO L375 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1] [2018-09-30 20:40:47,014 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:47,015 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:47,015 INFO L82 PathProgramCache]: Analyzing trace with hash 378307483, now seen corresponding path program 50 times [2018-09-30 20:40:47,015 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:47,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:47,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:47,015 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:47,015 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:47,309 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:47,309 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:47,317 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:40:47,345 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:40:47,345 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:47,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:47,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:47,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-30 20:40:47,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-30 20:40:47,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-30 20:40:47,644 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:47,644 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2018-09-30 20:40:48,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:48,086 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-09-30 20:40:48,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-30 20:40:48,086 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2018-09-30 20:40:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:48,087 INFO L225 Difference]: With dead ends: 109 [2018-09-30 20:40:48,087 INFO L226 Difference]: Without dead ends: 107 [2018-09-30 20:40:48,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:40:48,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-09-30 20:40:48,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-09-30 20:40:48,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-30 20:40:48,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-09-30 20:40:48,091 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2018-09-30 20:40:48,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:48,091 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-09-30 20:40:48,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-30 20:40:48,091 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-09-30 20:40:48,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-09-30 20:40:48,092 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:48,092 INFO L375 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1] [2018-09-30 20:40:48,092 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:48,093 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:48,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1518676907, now seen corresponding path program 51 times [2018-09-30 20:40:48,093 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:48,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:48,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:48,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:48,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:48,418 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:48,418 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:48,425 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:40:48,473 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-09-30 20:40:48,473 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:48,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:48,898 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:48,898 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-30 20:40:48,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-30 20:40:48,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-30 20:40:48,899 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:48,900 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2018-09-30 20:40:49,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:49,220 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-09-30 20:40:49,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-30 20:40:49,220 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2018-09-30 20:40:49,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:49,221 INFO L225 Difference]: With dead ends: 111 [2018-09-30 20:40:49,221 INFO L226 Difference]: Without dead ends: 109 [2018-09-30 20:40:49,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:40:49,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-09-30 20:40:49,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-09-30 20:40:49,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-09-30 20:40:49,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-09-30 20:40:49,224 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2018-09-30 20:40:49,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:49,225 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-09-30 20:40:49,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-30 20:40:49,225 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-09-30 20:40:49,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-09-30 20:40:49,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:49,226 INFO L375 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1] [2018-09-30 20:40:49,226 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:49,226 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:49,226 INFO L82 PathProgramCache]: Analyzing trace with hash 840425103, now seen corresponding path program 52 times [2018-09-30 20:40:49,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:49,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:49,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:49,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:49,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:49,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:49,952 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:49,952 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:49,963 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:40:50,013 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:40:50,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:50,017 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2756 backedges. 0 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:50,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:50,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-30 20:40:50,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-30 20:40:50,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-30 20:40:50,243 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:50,243 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2018-09-30 20:40:50,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:50,553 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-09-30 20:40:50,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-30 20:40:50,554 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2018-09-30 20:40:50,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:50,555 INFO L225 Difference]: With dead ends: 113 [2018-09-30 20:40:50,555 INFO L226 Difference]: Without dead ends: 111 [2018-09-30 20:40:50,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:40:50,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-30 20:40:50,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-09-30 20:40:50,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-09-30 20:40:50,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2018-09-30 20:40:50,558 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2018-09-30 20:40:50,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:50,558 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2018-09-30 20:40:50,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-30 20:40:50,558 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2018-09-30 20:40:50,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2018-09-30 20:40:50,559 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:50,559 INFO L375 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1] [2018-09-30 20:40:50,560 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:50,560 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:50,560 INFO L82 PathProgramCache]: Analyzing trace with hash 194724425, now seen corresponding path program 53 times [2018-09-30 20:40:50,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:50,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:50,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:50,560 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:50,560 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:51,184 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:51,184 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:51,202 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:40:51,314 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-09-30 20:40:51,314 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:51,317 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 0 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:51,560 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:51,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-30 20:40:51,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-30 20:40:51,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-30 20:40:51,561 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:51,561 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2018-09-30 20:40:51,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:51,772 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2018-09-30 20:40:51,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-30 20:40:51,772 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2018-09-30 20:40:51,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:51,774 INFO L225 Difference]: With dead ends: 115 [2018-09-30 20:40:51,774 INFO L226 Difference]: Without dead ends: 113 [2018-09-30 20:40:51,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:40:51,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-09-30 20:40:51,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-09-30 20:40:51,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-09-30 20:40:51,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-09-30 20:40:51,778 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2018-09-30 20:40:51,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:51,779 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-09-30 20:40:51,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-30 20:40:51,779 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-09-30 20:40:51,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-09-30 20:40:51,780 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:51,780 INFO L375 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1] [2018-09-30 20:40:51,780 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:51,780 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:51,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1848336509, now seen corresponding path program 54 times [2018-09-30 20:40:51,780 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:51,780 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:51,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:51,781 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:51,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:52,486 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:52,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:52,495 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:40:52,545 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-09-30 20:40:52,546 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:52,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:52,849 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:52,849 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-30 20:40:52,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-30 20:40:52,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-30 20:40:52,850 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:52,850 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2018-09-30 20:40:54,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:54,018 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2018-09-30 20:40:54,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-30 20:40:54,018 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2018-09-30 20:40:54,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:54,019 INFO L225 Difference]: With dead ends: 117 [2018-09-30 20:40:54,020 INFO L226 Difference]: Without dead ends: 115 [2018-09-30 20:40:54,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:40:54,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-09-30 20:40:54,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2018-09-30 20:40:54,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-09-30 20:40:54,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2018-09-30 20:40:54,023 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2018-09-30 20:40:54,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:54,023 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2018-09-30 20:40:54,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-30 20:40:54,023 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2018-09-30 20:40:54,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-09-30 20:40:54,024 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:54,024 INFO L375 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1] [2018-09-30 20:40:54,024 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:54,025 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:54,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1865127485, now seen corresponding path program 55 times [2018-09-30 20:40:54,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:54,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:54,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:54,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:54,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:54,329 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:54,329 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:54,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:54,368 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:54,639 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:54,639 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-30 20:40:54,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-30 20:40:54,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-30 20:40:54,640 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:54,640 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2018-09-30 20:40:55,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:55,158 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2018-09-30 20:40:55,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-30 20:40:55,159 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2018-09-30 20:40:55,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:55,163 INFO L225 Difference]: With dead ends: 119 [2018-09-30 20:40:55,163 INFO L226 Difference]: Without dead ends: 117 [2018-09-30 20:40:55,164 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time [2018-09-30 20:40:55,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-09-30 20:40:55,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2018-09-30 20:40:55,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-09-30 20:40:55,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2018-09-30 20:40:55,167 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2018-09-30 20:40:55,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:55,167 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2018-09-30 20:40:55,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-30 20:40:55,167 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2018-09-30 20:40:55,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-09-30 20:40:55,168 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:55,168 INFO L375 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1] [2018-09-30 20:40:55,168 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:55,168 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:55,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1386202743, now seen corresponding path program 56 times [2018-09-30 20:40:55,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:55,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:55,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:55,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:40:55,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:55,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:55,828 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:55,828 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:55,838 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:40:55,866 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:40:55,866 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:55,868 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3192 backedges. 0 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:56,253 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:56,253 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-30 20:40:56,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-30 20:40:56,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-30 20:40:56,254 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:56,254 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2018-09-30 20:40:56,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:56,615 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2018-09-30 20:40:56,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-30 20:40:56,615 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2018-09-30 20:40:56,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:56,616 INFO L225 Difference]: With dead ends: 121 [2018-09-30 20:40:56,616 INFO L226 Difference]: Without dead ends: 119 [2018-09-30 20:40:56,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:40:56,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-09-30 20:40:56,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-09-30 20:40:56,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-09-30 20:40:56,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2018-09-30 20:40:56,619 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2018-09-30 20:40:56,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:56,620 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2018-09-30 20:40:56,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-30 20:40:56,620 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2018-09-30 20:40:56,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-09-30 20:40:56,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:56,621 INFO L375 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1] [2018-09-30 20:40:56,621 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:56,621 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:56,621 INFO L82 PathProgramCache]: Analyzing trace with hash 701026353, now seen corresponding path program 57 times [2018-09-30 20:40:56,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:56,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:56,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:56,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:56,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:56,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:56,986 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:56,986 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:56,993 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:40:57,055 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-09-30 20:40:57,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:57,058 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 0 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:57,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:57,385 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-30 20:40:57,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-30 20:40:57,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-30 20:40:57,385 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:57,385 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2018-09-30 20:40:57,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:57,614 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-09-30 20:40:57,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-30 20:40:57,615 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2018-09-30 20:40:57,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:57,615 INFO L225 Difference]: With dead ends: 123 [2018-09-30 20:40:57,616 INFO L226 Difference]: Without dead ends: 121 [2018-09-30 20:40:57,616 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:40:57,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-09-30 20:40:57,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-09-30 20:40:57,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-30 20:40:57,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2018-09-30 20:40:57,619 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2018-09-30 20:40:57,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:57,620 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2018-09-30 20:40:57,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-30 20:40:57,620 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2018-09-30 20:40:57,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2018-09-30 20:40:57,621 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:57,621 INFO L375 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1] [2018-09-30 20:40:57,621 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:57,621 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:57,621 INFO L82 PathProgramCache]: Analyzing trace with hash -623488149, now seen corresponding path program 58 times [2018-09-30 20:40:57,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:57,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:57,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:57,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:57,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:40:58,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:58,105 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:40:58,105 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:40:58,113 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:40:58,147 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:40:58,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:40:58,150 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:40:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3422 backedges. 0 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:40:59,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:40:59,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-30 20:40:59,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-30 20:40:59,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-30 20:40:59,618 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:40:59,618 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2018-09-30 20:40:59,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:40:59,973 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2018-09-30 20:40:59,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-30 20:40:59,973 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2018-09-30 20:40:59,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:40:59,974 INFO L225 Difference]: With dead ends: 125 [2018-09-30 20:40:59,974 INFO L226 Difference]: Without dead ends: 123 [2018-09-30 20:40:59,974 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time [2018-09-30 20:40:59,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-30 20:40:59,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-09-30 20:40:59,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-09-30 20:40:59,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-09-30 20:40:59,977 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2018-09-30 20:40:59,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:40:59,978 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-09-30 20:40:59,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-30 20:40:59,978 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-09-30 20:40:59,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-09-30 20:40:59,979 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:40:59,979 INFO L375 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1] [2018-09-30 20:40:59,979 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:40:59,979 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:40:59,980 INFO L82 PathProgramCache]: Analyzing trace with hash 2123362341, now seen corresponding path program 59 times [2018-09-30 20:40:59,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:40:59,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:40:59,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:59,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:40:59,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:40:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:00,358 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:00,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:00,366 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:41:00,420 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-09-30 20:41:00,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:00,423 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 0 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:00,825 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:00,825 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-30 20:41:00,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-30 20:41:00,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-30 20:41:00,826 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:00,826 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2018-09-30 20:41:01,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:01,408 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2018-09-30 20:41:01,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-30 20:41:01,408 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2018-09-30 20:41:01,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:01,409 INFO L225 Difference]: With dead ends: 127 [2018-09-30 20:41:01,409 INFO L226 Difference]: Without dead ends: 125 [2018-09-30 20:41:01,409 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:41:01,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2018-09-30 20:41:01,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-09-30 20:41:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-30 20:41:01,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2018-09-30 20:41:01,412 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2018-09-30 20:41:01,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:01,412 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2018-09-30 20:41:01,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-30 20:41:01,412 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2018-09-30 20:41:01,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-30 20:41:01,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:01,412 INFO L375 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1] [2018-09-30 20:41:01,413 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:01,413 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:01,413 INFO L82 PathProgramCache]: Analyzing trace with hash 441796191, now seen corresponding path program 60 times [2018-09-30 20:41:01,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:01,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:01,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:01,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:01,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:02,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:02,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:02,427 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:02,434 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:41:02,493 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-09-30 20:41:02,493 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:02,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3660 backedges. 0 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:02,716 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:02,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-30 20:41:02,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-30 20:41:02,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-30 20:41:02,717 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:02,718 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2018-09-30 20:41:03,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:03,113 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2018-09-30 20:41:03,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-30 20:41:03,113 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2018-09-30 20:41:03,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:03,114 INFO L225 Difference]: With dead ends: 129 [2018-09-30 20:41:03,114 INFO L226 Difference]: Without dead ends: 127 [2018-09-30 20:41:03,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:41:03,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-09-30 20:41:03,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2018-09-30 20:41:03,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2018-09-30 20:41:03,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2018-09-30 20:41:03,117 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2018-09-30 20:41:03,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:03,118 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2018-09-30 20:41:03,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-30 20:41:03,118 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2018-09-30 20:41:03,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2018-09-30 20:41:03,119 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:03,119 INFO L375 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1] [2018-09-30 20:41:03,119 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:03,119 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:03,119 INFO L82 PathProgramCache]: Analyzing trace with hash -635570663, now seen corresponding path program 61 times [2018-09-30 20:41:03,119 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:03,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:03,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:03,120 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:03,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:04,582 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:04,582 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:04,590 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:04,623 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 0 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:04,854 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:04,855 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-30 20:41:04,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-30 20:41:04,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-30 20:41:04,855 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:04,856 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2018-09-30 20:41:05,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:05,201 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2018-09-30 20:41:05,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-30 20:41:05,201 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2018-09-30 20:41:05,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:05,202 INFO L225 Difference]: With dead ends: 131 [2018-09-30 20:41:05,202 INFO L226 Difference]: Without dead ends: 129 [2018-09-30 20:41:05,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time [2018-09-30 20:41:05,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-09-30 20:41:05,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2018-09-30 20:41:05,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-30 20:41:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2018-09-30 20:41:05,206 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2018-09-30 20:41:05,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:05,206 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2018-09-30 20:41:05,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-30 20:41:05,206 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2018-09-30 20:41:05,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-09-30 20:41:05,207 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:05,207 INFO L375 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1] [2018-09-30 20:41:05,207 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:05,207 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:05,207 INFO L82 PathProgramCache]: Analyzing trace with hash -897999021, now seen corresponding path program 62 times [2018-09-30 20:41:05,208 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:05,208 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:05,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:05,208 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:05,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:05,711 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:05,712 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:05,720 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:41:05,751 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:41:05,751 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:05,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3906 backedges. 0 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:06,006 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:06,006 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-30 20:41:06,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-30 20:41:06,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-30 20:41:06,007 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:06,007 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2018-09-30 20:41:06,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:06,501 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-09-30 20:41:06,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-30 20:41:06,501 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2018-09-30 20:41:06,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:06,502 INFO L225 Difference]: With dead ends: 133 [2018-09-30 20:41:06,502 INFO L226 Difference]: Without dead ends: 131 [2018-09-30 20:41:06,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:41:06,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-09-30 20:41:06,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-09-30 20:41:06,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-09-30 20:41:06,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2018-09-30 20:41:06,505 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2018-09-30 20:41:06,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:06,505 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2018-09-30 20:41:06,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-30 20:41:06,505 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2018-09-30 20:41:06,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2018-09-30 20:41:06,506 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:06,506 INFO L375 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1] [2018-09-30 20:41:06,507 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:06,507 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:06,507 INFO L82 PathProgramCache]: Analyzing trace with hash 311419405, now seen corresponding path program 63 times [2018-09-30 20:41:06,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:06,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:06,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:06,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:06,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:07,654 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:07,654 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:07,662 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:41:08,312 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-09-30 20:41:08,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:08,315 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:08,579 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:08,579 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-30 20:41:08,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-30 20:41:08,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-30 20:41:08,580 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:08,581 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2018-09-30 20:41:08,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:08,968 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2018-09-30 20:41:08,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-30 20:41:08,968 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2018-09-30 20:41:08,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:08,969 INFO L225 Difference]: With dead ends: 135 [2018-09-30 20:41:08,969 INFO L226 Difference]: Without dead ends: 133 [2018-09-30 20:41:08,969 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-09-30 20:41:08,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-09-30 20:41:08,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-09-30 20:41:08,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-09-30 20:41:08,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-09-30 20:41:08,972 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2018-09-30 20:41:08,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:08,972 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-09-30 20:41:08,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-30 20:41:08,972 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-09-30 20:41:08,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-09-30 20:41:08,973 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:08,973 INFO L375 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1] [2018-09-30 20:41:08,973 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:08,973 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:08,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1373610425, now seen corresponding path program 64 times [2018-09-30 20:41:08,974 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:08,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:08,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:08,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:08,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:09,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:09,307 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:09,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:09,315 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:41:09,347 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:41:09,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:09,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4160 backedges. 0 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:09,679 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:09,679 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-30 20:41:09,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-30 20:41:09,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-30 20:41:09,680 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:09,680 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2018-09-30 20:41:10,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:10,855 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2018-09-30 20:41:10,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-30 20:41:10,855 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2018-09-30 20:41:10,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:10,856 INFO L225 Difference]: With dead ends: 137 [2018-09-30 20:41:10,856 INFO L226 Difference]: Without dead ends: 135 [2018-09-30 20:41:10,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:41:10,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-30 20:41:10,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2018-09-30 20:41:10,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-09-30 20:41:10,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2018-09-30 20:41:10,859 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2018-09-30 20:41:10,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:10,859 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2018-09-30 20:41:10,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-30 20:41:10,859 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2018-09-30 20:41:10,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2018-09-30 20:41:10,860 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:10,860 INFO L375 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1] [2018-09-30 20:41:10,860 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:10,860 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:10,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1484606463, now seen corresponding path program 65 times [2018-09-30 20:41:10,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:10,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:10,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:10,861 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:10,861 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:11,338 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:11,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:11,345 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:41:11,487 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-09-30 20:41:11,487 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:11,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:11,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 0 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:11,789 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:11,789 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-30 20:41:11,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-30 20:41:11,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-30 20:41:11,790 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:11,791 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2018-09-30 20:41:12,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:12,216 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2018-09-30 20:41:12,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-30 20:41:12,217 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2018-09-30 20:41:12,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:12,217 INFO L225 Difference]: With dead ends: 139 [2018-09-30 20:41:12,217 INFO L226 Difference]: Without dead ends: 137 [2018-09-30 20:41:12,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:41:12,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2018-09-30 20:41:12,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2018-09-30 20:41:12,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-09-30 20:41:12,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2018-09-30 20:41:12,221 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2018-09-30 20:41:12,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:12,221 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2018-09-30 20:41:12,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-30 20:41:12,221 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2018-09-30 20:41:12,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2018-09-30 20:41:12,222 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:12,222 INFO L375 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1] [2018-09-30 20:41:12,222 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:12,223 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:12,223 INFO L82 PathProgramCache]: Analyzing trace with hash -777616581, now seen corresponding path program 66 times [2018-09-30 20:41:12,223 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:12,223 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:12,223 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:12,224 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:12,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:12,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:12,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:12,680 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:41:12,742 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-09-30 20:41:12,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:12,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4422 backedges. 0 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:13,163 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:13,164 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-30 20:41:13,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-30 20:41:13,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-30 20:41:13,164 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:13,165 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2018-09-30 20:41:13,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:13,530 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2018-09-30 20:41:13,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-30 20:41:13,530 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2018-09-30 20:41:13,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:13,531 INFO L225 Difference]: With dead ends: 141 [2018-09-30 20:41:13,531 INFO L226 Difference]: Without dead ends: 139 [2018-09-30 20:41:13,532 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:41:13,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-09-30 20:41:13,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2018-09-30 20:41:13,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2018-09-30 20:41:13,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2018-09-30 20:41:13,535 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2018-09-30 20:41:13,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:13,535 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2018-09-30 20:41:13,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-30 20:41:13,536 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2018-09-30 20:41:13,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-09-30 20:41:13,536 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:13,537 INFO L375 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1] [2018-09-30 20:41:13,537 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:13,537 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:13,537 INFO L82 PathProgramCache]: Analyzing trace with hash 34827253, now seen corresponding path program 67 times [2018-09-30 20:41:13,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:13,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:13,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:13,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:13,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:13,895 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:13,895 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:13,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:13,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 0 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:14,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:14,806 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-30 20:41:14,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-30 20:41:14,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-30 20:41:14,807 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:14,807 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2018-09-30 20:41:15,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:15,267 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-09-30 20:41:15,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-30 20:41:15,267 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2018-09-30 20:41:15,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:15,268 INFO L225 Difference]: With dead ends: 143 [2018-09-30 20:41:15,269 INFO L226 Difference]: Without dead ends: 141 [2018-09-30 20:41:15,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:41:15,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-09-30 20:41:15,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-09-30 20:41:15,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-09-30 20:41:15,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2018-09-30 20:41:15,272 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2018-09-30 20:41:15,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:15,272 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2018-09-30 20:41:15,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-30 20:41:15,272 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2018-09-30 20:41:15,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2018-09-30 20:41:15,273 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:15,273 INFO L375 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1] [2018-09-30 20:41:15,273 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:15,273 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:15,274 INFO L82 PathProgramCache]: Analyzing trace with hash -890696145, now seen corresponding path program 68 times [2018-09-30 20:41:15,274 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:15,274 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:15,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:15,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:15,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:15,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:15,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:15,853 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:41:15,889 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:41:15,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:15,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4692 backedges. 0 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:16,148 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:16,149 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-30 20:41:16,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-30 20:41:16,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-30 20:41:16,150 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:16,150 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2018-09-30 20:41:16,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:16,803 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2018-09-30 20:41:16,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-30 20:41:16,803 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2018-09-30 20:41:16,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:16,804 INFO L225 Difference]: With dead ends: 145 [2018-09-30 20:41:16,804 INFO L226 Difference]: Without dead ends: 143 [2018-09-30 20:41:16,805 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:41:16,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-09-30 20:41:16,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-09-30 20:41:16,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-09-30 20:41:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-09-30 20:41:16,808 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2018-09-30 20:41:16,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:16,808 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-09-30 20:41:16,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-30 20:41:16,809 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-09-30 20:41:16,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-09-30 20:41:16,809 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:16,809 INFO L375 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1] [2018-09-30 20:41:16,809 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:16,809 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:16,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1260451351, now seen corresponding path program 69 times [2018-09-30 20:41:16,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:16,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:16,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:16,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:16,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:17,173 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:17,173 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:17,180 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:41:17,265 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-09-30 20:41:17,265 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:17,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4830 backedges. 0 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:17,795 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:17,795 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-30 20:41:17,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-30 20:41:17,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-30 20:41:17,796 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:17,796 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2018-09-30 20:41:18,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:18,349 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2018-09-30 20:41:18,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-30 20:41:18,350 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2018-09-30 20:41:18,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:18,350 INFO L225 Difference]: With dead ends: 147 [2018-09-30 20:41:18,351 INFO L226 Difference]: Without dead ends: 145 [2018-09-30 20:41:18,351 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:41:18,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2018-09-30 20:41:18,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2018-09-30 20:41:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-09-30 20:41:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2018-09-30 20:41:18,354 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2018-09-30 20:41:18,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:18,354 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2018-09-30 20:41:18,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-30 20:41:18,354 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2018-09-30 20:41:18,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2018-09-30 20:41:18,355 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:18,355 INFO L375 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1] [2018-09-30 20:41:18,355 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:18,355 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:18,355 INFO L82 PathProgramCache]: Analyzing trace with hash -112918749, now seen corresponding path program 70 times [2018-09-30 20:41:18,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:18,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:18,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:18,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:18,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:18,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:18,737 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:18,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:18,745 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:41:18,780 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:41:18,780 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:18,783 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:19,084 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:19,084 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-30 20:41:19,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-30 20:41:19,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-30 20:41:19,085 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:19,085 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2018-09-30 20:41:19,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:19,562 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2018-09-30 20:41:19,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-30 20:41:19,563 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2018-09-30 20:41:19,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:19,564 INFO L225 Difference]: With dead ends: 149 [2018-09-30 20:41:19,564 INFO L226 Difference]: Without dead ends: 147 [2018-09-30 20:41:19,564 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:41:19,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-30 20:41:19,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2018-09-30 20:41:19,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-09-30 20:41:19,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2018-09-30 20:41:19,568 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2018-09-30 20:41:19,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:19,568 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2018-09-30 20:41:19,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-30 20:41:19,568 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2018-09-30 20:41:19,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-09-30 20:41:19,569 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:19,569 INFO L375 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1] [2018-09-30 20:41:19,569 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:19,570 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:19,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1140683299, now seen corresponding path program 71 times [2018-09-30 20:41:19,570 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:19,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:19,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:19,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:19,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:19,999 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:19,999 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:20,007 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:41:20,472 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-09-30 20:41:20,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:20,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5112 backedges. 0 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:20,825 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:20,826 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-30 20:41:20,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-30 20:41:20,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-30 20:41:20,827 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:20,827 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2018-09-30 20:41:21,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:21,306 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2018-09-30 20:41:21,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-30 20:41:21,307 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2018-09-30 20:41:21,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:21,308 INFO L225 Difference]: With dead ends: 151 [2018-09-30 20:41:21,308 INFO L226 Difference]: Without dead ends: 149 [2018-09-30 20:41:21,308 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:41:21,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-09-30 20:41:21,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2018-09-30 20:41:21,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-30 20:41:21,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2018-09-30 20:41:21,311 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2018-09-30 20:41:21,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:21,312 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2018-09-30 20:41:21,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-30 20:41:21,312 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2018-09-30 20:41:21,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-30 20:41:21,313 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:21,313 INFO L375 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1] [2018-09-30 20:41:21,313 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:21,313 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:21,313 INFO L82 PathProgramCache]: Analyzing trace with hash -979937769, now seen corresponding path program 72 times [2018-09-30 20:41:21,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:21,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:21,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:21,314 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:21,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:22,011 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:22,011 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:22,018 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:41:22,089 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2018-09-30 20:41:22,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:22,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 0 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:22,430 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:22,431 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-30 20:41:22,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-30 20:41:22,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-30 20:41:22,432 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:22,432 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2018-09-30 20:41:22,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:22,776 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-09-30 20:41:22,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-30 20:41:22,777 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2018-09-30 20:41:22,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:22,778 INFO L225 Difference]: With dead ends: 153 [2018-09-30 20:41:22,778 INFO L226 Difference]: Without dead ends: 151 [2018-09-30 20:41:22,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:41:22,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-09-30 20:41:22,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-09-30 20:41:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-09-30 20:41:22,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2018-09-30 20:41:22,782 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2018-09-30 20:41:22,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:22,782 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2018-09-30 20:41:22,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-30 20:41:22,783 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2018-09-30 20:41:22,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2018-09-30 20:41:22,783 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:22,783 INFO L375 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1] [2018-09-30 20:41:22,784 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:22,784 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:22,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1122306095, now seen corresponding path program 73 times [2018-09-30 20:41:22,784 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:22,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:22,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:22,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:22,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:23,236 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:23,236 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:23,242 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:23,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:23,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5402 backedges. 0 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:23,571 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:23,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-30 20:41:23,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-30 20:41:23,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-30 20:41:23,572 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:23,572 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2018-09-30 20:41:24,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:24,080 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2018-09-30 20:41:24,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-30 20:41:24,080 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2018-09-30 20:41:24,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:24,081 INFO L225 Difference]: With dead ends: 155 [2018-09-30 20:41:24,081 INFO L226 Difference]: Without dead ends: 153 [2018-09-30 20:41:24,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:41:24,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-09-30 20:41:24,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-09-30 20:41:24,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-09-30 20:41:24,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-09-30 20:41:24,084 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2018-09-30 20:41:24,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:24,084 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-09-30 20:41:24,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-30 20:41:24,084 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-09-30 20:41:24,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-09-30 20:41:24,085 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:24,085 INFO L375 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1] [2018-09-30 20:41:24,085 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:24,085 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:24,085 INFO L82 PathProgramCache]: Analyzing trace with hash -499313909, now seen corresponding path program 74 times [2018-09-30 20:41:24,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:24,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:24,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:24,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:24,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:24,587 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:24,587 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:24,595 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:41:24,632 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:41:24,632 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:24,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5550 backedges. 0 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:24,932 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:24,932 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-30 20:41:24,933 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-30 20:41:24,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-30 20:41:24,935 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:24,935 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2018-09-30 20:41:25,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:25,316 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2018-09-30 20:41:25,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-30 20:41:25,317 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2018-09-30 20:41:25,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:25,317 INFO L225 Difference]: With dead ends: 157 [2018-09-30 20:41:25,318 INFO L226 Difference]: Without dead ends: 155 [2018-09-30 20:41:25,318 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:41:25,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2018-09-30 20:41:25,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2018-09-30 20:41:25,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-09-30 20:41:25,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2018-09-30 20:41:25,320 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2018-09-30 20:41:25,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:25,321 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2018-09-30 20:41:25,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-30 20:41:25,321 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2018-09-30 20:41:25,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2018-09-30 20:41:25,321 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:25,321 INFO L375 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1] [2018-09-30 20:41:25,321 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:25,322 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:25,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1195722693, now seen corresponding path program 75 times [2018-09-30 20:41:25,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:25,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:25,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:25,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:25,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:25,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:25,736 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:25,743 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:41:25,823 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2018-09-30 20:41:25,823 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:25,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5700 backedges. 0 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:26,092 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:26,093 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-30 20:41:26,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-30 20:41:26,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-30 20:41:26,094 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:26,094 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2018-09-30 20:41:26,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:26,433 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2018-09-30 20:41:26,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-30 20:41:26,433 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2018-09-30 20:41:26,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:26,434 INFO L225 Difference]: With dead ends: 159 [2018-09-30 20:41:26,434 INFO L226 Difference]: Without dead ends: 157 [2018-09-30 20:41:26,434 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:41:26,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2018-09-30 20:41:26,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2018-09-30 20:41:26,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-09-30 20:41:26,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2018-09-30 20:41:26,437 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2018-09-30 20:41:26,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:26,437 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2018-09-30 20:41:26,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-30 20:41:26,437 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2018-09-30 20:41:26,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-09-30 20:41:26,438 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:26,438 INFO L375 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1] [2018-09-30 20:41:26,438 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:26,438 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:26,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1961675265, now seen corresponding path program 76 times [2018-09-30 20:41:26,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:26,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:26,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:26,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:26,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:26,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:27,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:27,076 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:27,076 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:27,084 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:41:27,121 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:41:27,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:27,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5852 backedges. 0 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:27,384 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:27,384 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-09-30 20:41:27,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-09-30 20:41:27,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-09-30 20:41:27,385 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:27,385 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2018-09-30 20:41:28,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:28,048 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2018-09-30 20:41:28,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-09-30 20:41:28,049 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2018-09-30 20:41:28,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:28,049 INFO L225 Difference]: With dead ends: 161 [2018-09-30 20:41:28,050 INFO L226 Difference]: Without dead ends: 159 [2018-09-30 20:41:28,050 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:41:28,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-30 20:41:28,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2018-09-30 20:41:28,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2018-09-30 20:41:28,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2018-09-30 20:41:28,054 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2018-09-30 20:41:28,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:28,054 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2018-09-30 20:41:28,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-09-30 20:41:28,054 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2018-09-30 20:41:28,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-09-30 20:41:28,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:28,055 INFO L375 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1] [2018-09-30 20:41:28,056 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:28,056 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:28,056 INFO L82 PathProgramCache]: Analyzing trace with hash 320765369, now seen corresponding path program 77 times [2018-09-30 20:41:28,056 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:28,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:28,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:28,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:28,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:28,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:28,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:28,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:28,465 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:41:28,541 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2018-09-30 20:41:28,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:28,544 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:28,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6006 backedges. 0 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:28,832 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:28,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-09-30 20:41:28,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-09-30 20:41:28,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-09-30 20:41:28,834 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:28,834 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2018-09-30 20:41:29,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:29,518 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-09-30 20:41:29,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-09-30 20:41:29,518 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2018-09-30 20:41:29,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:29,519 INFO L225 Difference]: With dead ends: 163 [2018-09-30 20:41:29,519 INFO L226 Difference]: Without dead ends: 161 [2018-09-30 20:41:29,523 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time [2018-09-30 20:41:29,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-09-30 20:41:29,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-09-30 20:41:29,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-09-30 20:41:29,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2018-09-30 20:41:29,527 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2018-09-30 20:41:29,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:29,527 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2018-09-30 20:41:29,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-09-30 20:41:29,527 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2018-09-30 20:41:29,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-09-30 20:41:29,528 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:29,528 INFO L375 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1] [2018-09-30 20:41:29,529 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:29,529 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:29,529 INFO L82 PathProgramCache]: Analyzing trace with hash -982073613, now seen corresponding path program 78 times [2018-09-30 20:41:29,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:29,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:29,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:29,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:29,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:29,970 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:29,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:29,977 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:41:30,057 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2018-09-30 20:41:30,058 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:30,060 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:30,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6162 backedges. 0 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:30,360 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:30,360 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-09-30 20:41:30,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-09-30 20:41:30,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-09-30 20:41:30,362 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:30,362 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2018-09-30 20:41:30,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:30,743 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2018-09-30 20:41:30,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-09-30 20:41:30,743 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2018-09-30 20:41:30,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:30,744 INFO L225 Difference]: With dead ends: 165 [2018-09-30 20:41:30,744 INFO L226 Difference]: Without dead ends: 163 [2018-09-30 20:41:30,744 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:41:30,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-09-30 20:41:30,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-09-30 20:41:30,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-09-30 20:41:30,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-09-30 20:41:30,748 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2018-09-30 20:41:30,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:30,748 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-09-30 20:41:30,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-09-30 20:41:30,748 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-09-30 20:41:30,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-09-30 20:41:30,749 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:30,749 INFO L375 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1] [2018-09-30 20:41:30,749 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:30,750 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:30,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1120115117, now seen corresponding path program 79 times [2018-09-30 20:41:30,750 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:30,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:30,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:30,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:30,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:30,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:31,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:31,279 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:31,279 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:31,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:31,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6320 backedges. 0 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:31,669 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:31,669 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-09-30 20:41:31,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-09-30 20:41:31,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-09-30 20:41:31,670 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:31,670 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2018-09-30 20:41:32,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:32,343 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2018-09-30 20:41:32,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-09-30 20:41:32,344 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2018-09-30 20:41:32,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:32,344 INFO L225 Difference]: With dead ends: 167 [2018-09-30 20:41:32,344 INFO L226 Difference]: Without dead ends: 165 [2018-09-30 20:41:32,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:41:32,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2018-09-30 20:41:32,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2018-09-30 20:41:32,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-09-30 20:41:32,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2018-09-30 20:41:32,348 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2018-09-30 20:41:32,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:32,348 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2018-09-30 20:41:32,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-09-30 20:41:32,348 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2018-09-30 20:41:32,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2018-09-30 20:41:32,349 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:32,349 INFO L375 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1] [2018-09-30 20:41:32,349 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:32,349 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:32,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1606111769, now seen corresponding path program 80 times [2018-09-30 20:41:32,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:32,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:32,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:32,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:32,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:32,889 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:32,889 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:32,898 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:41:32,940 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:41:32,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:32,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 0 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:33,242 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:33,242 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-09-30 20:41:33,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-09-30 20:41:33,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-09-30 20:41:33,243 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:33,243 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2018-09-30 20:41:33,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:33,844 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2018-09-30 20:41:33,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-09-30 20:41:33,844 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2018-09-30 20:41:33,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:33,845 INFO L225 Difference]: With dead ends: 169 [2018-09-30 20:41:33,845 INFO L226 Difference]: Without dead ends: 167 [2018-09-30 20:41:33,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:41:33,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2018-09-30 20:41:33,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2018-09-30 20:41:33,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-30 20:41:33,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2018-09-30 20:41:33,848 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2018-09-30 20:41:33,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:33,848 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2018-09-30 20:41:33,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-09-30 20:41:33,848 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2018-09-30 20:41:33,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-09-30 20:41:33,849 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:33,849 INFO L375 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1] [2018-09-30 20:41:33,849 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:33,849 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:33,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1580098655, now seen corresponding path program 81 times [2018-09-30 20:41:33,849 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:33,849 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:33,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:33,850 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:33,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:34,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:34,303 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:34,303 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:34,310 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:41:34,404 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2018-09-30 20:41:34,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:34,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6642 backedges. 0 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:34,713 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:34,713 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-09-30 20:41:34,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-09-30 20:41:34,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-09-30 20:41:34,714 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:34,714 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2018-09-30 20:41:35,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:35,242 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2018-09-30 20:41:35,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-09-30 20:41:35,242 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2018-09-30 20:41:35,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:35,243 INFO L225 Difference]: With dead ends: 171 [2018-09-30 20:41:35,243 INFO L226 Difference]: Without dead ends: 169 [2018-09-30 20:41:35,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:41:35,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-09-30 20:41:35,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2018-09-30 20:41:35,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2018-09-30 20:41:35,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2018-09-30 20:41:35,246 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2018-09-30 20:41:35,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:35,247 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2018-09-30 20:41:35,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-09-30 20:41:35,247 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2018-09-30 20:41:35,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-09-30 20:41:35,247 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:35,247 INFO L375 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1] [2018-09-30 20:41:35,248 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:35,248 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:35,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1943667419, now seen corresponding path program 82 times [2018-09-30 20:41:35,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:35,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:35,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:35,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:35,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:35,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:35,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:35,831 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:35,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:35,839 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:41:35,882 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:41:35,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:35,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6806 backedges. 0 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:36,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:36,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-09-30 20:41:36,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-09-30 20:41:36,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-09-30 20:41:36,340 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:36,340 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2018-09-30 20:41:36,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:36,778 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-09-30 20:41:36,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-09-30 20:41:36,779 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2018-09-30 20:41:36,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:36,780 INFO L225 Difference]: With dead ends: 173 [2018-09-30 20:41:36,780 INFO L226 Difference]: Without dead ends: 171 [2018-09-30 20:41:36,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:41:36,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-30 20:41:36,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-09-30 20:41:36,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-09-30 20:41:36,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2018-09-30 20:41:36,784 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2018-09-30 20:41:36,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:36,785 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2018-09-30 20:41:36,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-09-30 20:41:36,785 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2018-09-30 20:41:36,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-09-30 20:41:36,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:36,785 INFO L375 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1] [2018-09-30 20:41:36,786 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:36,786 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:36,786 INFO L82 PathProgramCache]: Analyzing trace with hash -446332011, now seen corresponding path program 83 times [2018-09-30 20:41:36,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:36,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:36,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:36,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:36,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:37,458 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:37,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:37,466 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:41:37,549 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2018-09-30 20:41:37,550 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:37,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:37,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6972 backedges. 0 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:37,848 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:37,848 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-09-30 20:41:37,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-09-30 20:41:37,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-09-30 20:41:37,849 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:37,849 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2018-09-30 20:41:38,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:38,265 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2018-09-30 20:41:38,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-30 20:41:38,266 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2018-09-30 20:41:38,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:38,266 INFO L225 Difference]: With dead ends: 175 [2018-09-30 20:41:38,267 INFO L226 Difference]: Without dead ends: 173 [2018-09-30 20:41:38,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:41:38,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-09-30 20:41:38,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-09-30 20:41:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-30 20:41:38,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-09-30 20:41:38,269 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2018-09-30 20:41:38,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:38,270 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-09-30 20:41:38,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-09-30 20:41:38,270 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-09-30 20:41:38,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-30 20:41:38,270 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:38,270 INFO L375 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1] [2018-09-30 20:41:38,271 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:38,271 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:38,271 INFO L82 PathProgramCache]: Analyzing trace with hash 571719119, now seen corresponding path program 84 times [2018-09-30 20:41:38,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:38,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:38,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:38,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:38,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:38,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:38,767 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:38,767 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:38,778 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:41:38,862 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2018-09-30 20:41:38,863 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:38,866 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:39,168 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:39,168 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-09-30 20:41:39,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-09-30 20:41:39,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-09-30 20:41:39,169 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:39,169 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2018-09-30 20:41:39,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:39,770 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2018-09-30 20:41:39,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-09-30 20:41:39,770 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2018-09-30 20:41:39,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:39,771 INFO L225 Difference]: With dead ends: 177 [2018-09-30 20:41:39,771 INFO L226 Difference]: Without dead ends: 175 [2018-09-30 20:41:39,772 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:41:39,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2018-09-30 20:41:39,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2018-09-30 20:41:39,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-09-30 20:41:39,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2018-09-30 20:41:39,775 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2018-09-30 20:41:39,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:39,775 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2018-09-30 20:41:39,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-09-30 20:41:39,776 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2018-09-30 20:41:39,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-09-30 20:41:39,776 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:39,777 INFO L375 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1] [2018-09-30 20:41:39,777 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:39,777 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:39,777 INFO L82 PathProgramCache]: Analyzing trace with hash -333688439, now seen corresponding path program 85 times [2018-09-30 20:41:39,777 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:39,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:39,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:39,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:39,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:40,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:40,367 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:40,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:40,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7310 backedges. 0 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:40,724 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:40,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-09-30 20:41:40,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-09-30 20:41:40,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-09-30 20:41:40,726 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:40,726 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2018-09-30 20:41:41,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:41,182 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2018-09-30 20:41:41,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-09-30 20:41:41,182 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2018-09-30 20:41:41,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:41,183 INFO L225 Difference]: With dead ends: 179 [2018-09-30 20:41:41,183 INFO L226 Difference]: Without dead ends: 177 [2018-09-30 20:41:41,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:41:41,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-09-30 20:41:41,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2018-09-30 20:41:41,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2018-09-30 20:41:41,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2018-09-30 20:41:41,187 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2018-09-30 20:41:41,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:41,187 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2018-09-30 20:41:41,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-09-30 20:41:41,187 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2018-09-30 20:41:41,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2018-09-30 20:41:41,188 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:41,188 INFO L375 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1] [2018-09-30 20:41:41,188 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:41,188 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:41,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1448009411, now seen corresponding path program 86 times [2018-09-30 20:41:41,189 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:41,189 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:41,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:41,189 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:41,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:41,683 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:41,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:41,691 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:41:41,745 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:41:41,745 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:41,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:42,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 0 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:42,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:42,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-09-30 20:41:42,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-09-30 20:41:42,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-09-30 20:41:42,231 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:42,231 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2018-09-30 20:41:42,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:42,795 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2018-09-30 20:41:42,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 20:41:42,795 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2018-09-30 20:41:42,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:42,796 INFO L225 Difference]: With dead ends: 181 [2018-09-30 20:41:42,796 INFO L226 Difference]: Without dead ends: 179 [2018-09-30 20:41:42,796 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:41:42,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-09-30 20:41:42,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2018-09-30 20:41:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2018-09-30 20:41:42,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2018-09-30 20:41:42,799 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2018-09-30 20:41:42,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:42,799 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2018-09-30 20:41:42,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-09-30 20:41:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2018-09-30 20:41:42,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-09-30 20:41:42,800 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:42,800 INFO L375 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1] [2018-09-30 20:41:42,800 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:42,800 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:42,800 INFO L82 PathProgramCache]: Analyzing trace with hash -32307843, now seen corresponding path program 87 times [2018-09-30 20:41:42,800 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:42,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:42,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:42,801 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:42,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:43,461 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:43,461 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:43,469 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:41:43,567 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2018-09-30 20:41:43,567 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:43,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7656 backedges. 0 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:43,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:43,878 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-09-30 20:41:43,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-09-30 20:41:43,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-09-30 20:41:43,879 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:43,880 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2018-09-30 20:41:44,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:44,344 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-09-30 20:41:44,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-09-30 20:41:44,344 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2018-09-30 20:41:44,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:44,345 INFO L225 Difference]: With dead ends: 183 [2018-09-30 20:41:44,345 INFO L226 Difference]: Without dead ends: 181 [2018-09-30 20:41:44,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:41:44,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-09-30 20:41:44,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-09-30 20:41:44,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-30 20:41:44,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2018-09-30 20:41:44,349 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2018-09-30 20:41:44,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:44,349 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2018-09-30 20:41:44,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-09-30 20:41:44,349 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2018-09-30 20:41:44,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2018-09-30 20:41:44,350 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:44,350 INFO L375 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1] [2018-09-30 20:41:44,350 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:44,350 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:44,350 INFO L82 PathProgramCache]: Analyzing trace with hash -983013961, now seen corresponding path program 88 times [2018-09-30 20:41:44,350 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:44,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:44,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:44,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:44,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:44,848 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:44,848 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:44,855 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:41:44,898 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:41:44,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:44,901 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7832 backedges. 0 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:45,222 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:45,223 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-09-30 20:41:45,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-09-30 20:41:45,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-09-30 20:41:45,224 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:45,224 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2018-09-30 20:41:45,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:45,787 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2018-09-30 20:41:45,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-09-30 20:41:45,787 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2018-09-30 20:41:45,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:45,788 INFO L225 Difference]: With dead ends: 185 [2018-09-30 20:41:45,788 INFO L226 Difference]: Without dead ends: 183 [2018-09-30 20:41:45,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time [2018-09-30 20:41:45,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-30 20:41:45,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-09-30 20:41:45,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-30 20:41:45,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-09-30 20:41:45,791 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2018-09-30 20:41:45,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:45,792 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-09-30 20:41:45,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-09-30 20:41:45,792 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-09-30 20:41:45,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-09-30 20:41:45,792 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:45,792 INFO L375 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1] [2018-09-30 20:41:45,793 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:45,793 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:45,793 INFO L82 PathProgramCache]: Analyzing trace with hash 216440689, now seen corresponding path program 89 times [2018-09-30 20:41:45,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:45,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:45,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:45,794 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:45,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:46,402 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:46,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:46,409 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:41:46,502 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2018-09-30 20:41:46,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:46,506 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8010 backedges. 0 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:46,827 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:46,827 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-09-30 20:41:46,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-09-30 20:41:46,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-09-30 20:41:46,828 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:46,829 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2018-09-30 20:41:47,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:47,424 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2018-09-30 20:41:47,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-09-30 20:41:47,424 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2018-09-30 20:41:47,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:47,425 INFO L225 Difference]: With dead ends: 187 [2018-09-30 20:41:47,425 INFO L226 Difference]: Without dead ends: 185 [2018-09-30 20:41:47,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:41:47,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2018-09-30 20:41:47,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2018-09-30 20:41:47,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-09-30 20:41:47,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2018-09-30 20:41:47,428 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2018-09-30 20:41:47,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:47,429 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2018-09-30 20:41:47,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-09-30 20:41:47,429 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2018-09-30 20:41:47,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-09-30 20:41:47,429 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:47,429 INFO L375 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1] [2018-09-30 20:41:47,430 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:47,430 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:47,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1841124011, now seen corresponding path program 90 times [2018-09-30 20:41:47,430 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:47,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:47,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:47,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:47,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:47,940 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:47,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:47,949 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:41:48,045 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2018-09-30 20:41:48,046 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:48,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8190 backedges. 0 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:48,376 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:48,377 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-09-30 20:41:48,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-09-30 20:41:48,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-09-30 20:41:48,378 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:48,378 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2018-09-30 20:41:48,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:48,826 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2018-09-30 20:41:48,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-09-30 20:41:48,827 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2018-09-30 20:41:48,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:48,827 INFO L225 Difference]: With dead ends: 189 [2018-09-30 20:41:48,828 INFO L226 Difference]: Without dead ends: 187 [2018-09-30 20:41:48,828 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:41:48,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-09-30 20:41:48,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2018-09-30 20:41:48,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2018-09-30 20:41:48,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2018-09-30 20:41:48,832 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2018-09-30 20:41:48,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:48,832 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2018-09-30 20:41:48,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-09-30 20:41:48,833 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2018-09-30 20:41:48,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2018-09-30 20:41:48,833 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:48,834 INFO L375 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1] [2018-09-30 20:41:48,834 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:48,834 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:48,834 INFO L82 PathProgramCache]: Analyzing trace with hash -206299291, now seen corresponding path program 91 times [2018-09-30 20:41:48,834 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:48,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:48,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:48,836 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:48,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:49,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:49,378 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:49,378 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:49,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:49,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8372 backedges. 0 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:49,757 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:49,758 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-09-30 20:41:49,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-09-30 20:41:49,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-09-30 20:41:49,759 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:49,759 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2018-09-30 20:41:50,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:50,211 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2018-09-30 20:41:50,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-09-30 20:41:50,211 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2018-09-30 20:41:50,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:50,212 INFO L225 Difference]: With dead ends: 191 [2018-09-30 20:41:50,212 INFO L226 Difference]: Without dead ends: 189 [2018-09-30 20:41:50,212 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:41:50,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-09-30 20:41:50,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2018-09-30 20:41:50,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-09-30 20:41:50,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2018-09-30 20:41:50,217 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2018-09-30 20:41:50,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:50,217 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2018-09-30 20:41:50,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-09-30 20:41:50,217 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2018-09-30 20:41:50,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-09-30 20:41:50,218 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:50,218 INFO L375 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1] [2018-09-30 20:41:50,218 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:50,219 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:50,219 INFO L82 PathProgramCache]: Analyzing trace with hash -685070945, now seen corresponding path program 92 times [2018-09-30 20:41:50,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:50,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:50,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:50,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:50,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:50,787 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:50,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:50,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:41:50,840 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:41:50,840 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:50,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:51,212 INFO L134 CoverageAnalysis]: Checked inductivity of 8556 backedges. 0 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:51,232 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:51,232 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-09-30 20:41:51,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-09-30 20:41:51,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-09-30 20:41:51,233 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:51,234 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 95 states. [2018-09-30 20:41:51,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:51,693 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-09-30 20:41:51,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-09-30 20:41:51,694 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 188 [2018-09-30 20:41:51,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:51,695 INFO L225 Difference]: With dead ends: 193 [2018-09-30 20:41:51,695 INFO L226 Difference]: Without dead ends: 191 [2018-09-30 20:41:51,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:41:51,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-09-30 20:41:51,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-09-30 20:41:51,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-09-30 20:41:51,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2018-09-30 20:41:51,698 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2018-09-30 20:41:51,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:51,699 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2018-09-30 20:41:51,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-09-30 20:41:51,699 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2018-09-30 20:41:51,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2018-09-30 20:41:51,700 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:51,700 INFO L375 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1] [2018-09-30 20:41:51,700 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:51,700 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:51,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1223129767, now seen corresponding path program 93 times [2018-09-30 20:41:51,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:51,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:51,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:51,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:51,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:51,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:52,334 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:52,334 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:52,342 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:41:52,488 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2018-09-30 20:41:52,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:52,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:52,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8742 backedges. 0 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:52,829 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:52,829 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-09-30 20:41:52,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-09-30 20:41:52,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-09-30 20:41:52,830 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:52,831 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 96 states. [2018-09-30 20:41:53,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:53,443 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2018-09-30 20:41:53,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-09-30 20:41:53,443 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 190 [2018-09-30 20:41:53,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:53,444 INFO L225 Difference]: With dead ends: 195 [2018-09-30 20:41:53,444 INFO L226 Difference]: Without dead ends: 193 [2018-09-30 20:41:53,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:41:53,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-09-30 20:41:53,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-09-30 20:41:53,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-09-30 20:41:53,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-09-30 20:41:53,447 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2018-09-30 20:41:53,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:53,447 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-09-30 20:41:53,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-09-30 20:41:53,447 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-09-30 20:41:53,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-09-30 20:41:53,448 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:53,448 INFO L375 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1] [2018-09-30 20:41:53,448 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:53,448 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:53,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1393385107, now seen corresponding path program 94 times [2018-09-30 20:41:53,449 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:53,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:53,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:53,449 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:53,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:54,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:54,003 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:54,003 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:54,011 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:41:54,060 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:41:54,060 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:54,063 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:54,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:54,401 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:54,401 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-09-30 20:41:54,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-09-30 20:41:54,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-09-30 20:41:54,402 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:54,402 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 97 states. [2018-09-30 20:41:54,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:54,982 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2018-09-30 20:41:54,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-09-30 20:41:54,983 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 192 [2018-09-30 20:41:54,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:54,984 INFO L225 Difference]: With dead ends: 197 [2018-09-30 20:41:54,984 INFO L226 Difference]: Without dead ends: 195 [2018-09-30 20:41:54,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:41:54,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-30 20:41:54,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2018-09-30 20:41:54,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-09-30 20:41:54,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2018-09-30 20:41:54,987 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2018-09-30 20:41:54,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:54,987 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2018-09-30 20:41:54,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-09-30 20:41:54,987 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2018-09-30 20:41:54,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2018-09-30 20:41:54,988 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:54,988 INFO L375 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1] [2018-09-30 20:41:54,988 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:54,988 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:54,988 INFO L82 PathProgramCache]: Analyzing trace with hash -986656435, now seen corresponding path program 95 times [2018-09-30 20:41:54,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:54,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:54,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:54,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:54,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:55,544 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:55,544 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:55,554 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:41:55,654 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2018-09-30 20:41:55,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:55,657 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9120 backedges. 0 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:56,014 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:56,014 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-09-30 20:41:56,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-09-30 20:41:56,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-09-30 20:41:56,015 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:56,015 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 98 states. [2018-09-30 20:41:56,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:56,648 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2018-09-30 20:41:56,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-09-30 20:41:56,649 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 194 [2018-09-30 20:41:56,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:56,650 INFO L225 Difference]: With dead ends: 199 [2018-09-30 20:41:56,650 INFO L226 Difference]: Without dead ends: 197 [2018-09-30 20:41:56,650 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:41:56,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2018-09-30 20:41:56,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2018-09-30 20:41:56,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-30 20:41:56,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2018-09-30 20:41:56,654 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2018-09-30 20:41:56,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:56,654 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2018-09-30 20:41:56,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-09-30 20:41:56,654 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2018-09-30 20:41:56,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-30 20:41:56,655 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:56,655 INFO L375 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1] [2018-09-30 20:41:56,656 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:56,656 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:56,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1010990471, now seen corresponding path program 96 times [2018-09-30 20:41:56,656 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:56,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:56,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:56,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:56,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:57,346 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:57,346 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:57,355 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:41:57,466 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2018-09-30 20:41:57,466 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:41:57,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9312 backedges. 0 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:57,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:57,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-09-30 20:41:57,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-09-30 20:41:57,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-09-30 20:41:57,932 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:57,932 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 99 states. [2018-09-30 20:41:58,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:58,399 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2018-09-30 20:41:58,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-09-30 20:41:58,399 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 196 [2018-09-30 20:41:58,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:58,400 INFO L225 Difference]: With dead ends: 201 [2018-09-30 20:41:58,400 INFO L226 Difference]: Without dead ends: 199 [2018-09-30 20:41:58,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:41:58,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-09-30 20:41:58,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2018-09-30 20:41:58,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2018-09-30 20:41:58,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2018-09-30 20:41:58,405 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2018-09-30 20:41:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:58,405 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2018-09-30 20:41:58,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-09-30 20:41:58,406 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2018-09-30 20:41:58,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-09-30 20:41:58,407 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:58,407 INFO L375 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1] [2018-09-30 20:41:58,407 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:58,407 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:58,407 INFO L82 PathProgramCache]: Analyzing trace with hash 899285825, now seen corresponding path program 97 times [2018-09-30 20:41:58,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:58,408 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:58,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:58,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:41:58,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:58,995 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:41:58,995 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:41:59,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:41:59,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:41:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 9506 backedges. 0 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:41:59,412 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:41:59,412 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-09-30 20:41:59,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-09-30 20:41:59,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-09-30 20:41:59,414 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:41:59,414 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand 100 states. [2018-09-30 20:41:59,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:41:59,972 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-09-30 20:41:59,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-09-30 20:41:59,972 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 198 [2018-09-30 20:41:59,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:41:59,973 INFO L225 Difference]: With dead ends: 203 [2018-09-30 20:41:59,973 INFO L226 Difference]: Without dead ends: 201 [2018-09-30 20:41:59,973 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:41:59,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-30 20:41:59,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-09-30 20:41:59,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-09-30 20:41:59,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2018-09-30 20:41:59,976 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2018-09-30 20:41:59,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:41:59,977 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2018-09-30 20:41:59,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-09-30 20:41:59,977 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2018-09-30 20:41:59,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2018-09-30 20:41:59,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:41:59,978 INFO L375 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1] [2018-09-30 20:41:59,978 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:41:59,978 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:41:59,978 INFO L82 PathProgramCache]: Analyzing trace with hash 925303419, now seen corresponding path program 98 times [2018-09-30 20:41:59,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:41:59,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:41:59,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:41:59,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:41:59,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:00,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:00,580 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:00,580 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:00,587 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:42:00,635 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:42:00,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:00,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9702 backedges. 0 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:00,989 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:00,989 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-09-30 20:42:00,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-09-30 20:42:00,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-09-30 20:42:00,991 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:00,991 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 101 states. [2018-09-30 20:42:01,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:01,570 INFO L93 Difference]: Finished difference Result 205 states and 205 transitions. [2018-09-30 20:42:01,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-09-30 20:42:01,571 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 200 [2018-09-30 20:42:01,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:01,572 INFO L225 Difference]: With dead ends: 205 [2018-09-30 20:42:01,572 INFO L226 Difference]: Without dead ends: 203 [2018-09-30 20:42:01,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time [2018-09-30 20:42:01,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-09-30 20:42:01,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-09-30 20:42:01,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-09-30 20:42:01,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-09-30 20:42:01,576 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2018-09-30 20:42:01,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:01,576 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-09-30 20:42:01,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-09-30 20:42:01,576 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-09-30 20:42:01,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-09-30 20:42:01,577 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:01,577 INFO L375 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1] [2018-09-30 20:42:01,577 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:01,577 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:01,577 INFO L82 PathProgramCache]: Analyzing trace with hash 158407477, now seen corresponding path program 99 times [2018-09-30 20:42:01,577 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:01,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:01,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:01,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:01,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:02,194 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:02,194 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:02,201 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:42:02,320 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2018-09-30 20:42:02,320 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:02,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9900 backedges. 0 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:02,929 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:02,929 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-09-30 20:42:02,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-09-30 20:42:02,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-09-30 20:42:02,931 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:02,931 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 102 states. [2018-09-30 20:42:03,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:03,451 INFO L93 Difference]: Finished difference Result 207 states and 207 transitions. [2018-09-30 20:42:03,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-09-30 20:42:03,451 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 202 [2018-09-30 20:42:03,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:03,452 INFO L225 Difference]: With dead ends: 207 [2018-09-30 20:42:03,452 INFO L226 Difference]: Without dead ends: 205 [2018-09-30 20:42:03,452 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:42:03,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2018-09-30 20:42:03,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2018-09-30 20:42:03,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-09-30 20:42:03,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2018-09-30 20:42:03,455 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2018-09-30 20:42:03,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:03,455 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2018-09-30 20:42:03,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-09-30 20:42:03,455 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2018-09-30 20:42:03,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-09-30 20:42:03,456 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:03,456 INFO L375 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1] [2018-09-30 20:42:03,456 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:03,457 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:03,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1905782127, now seen corresponding path program 100 times [2018-09-30 20:42:03,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:03,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:03,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:03,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:03,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:03,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:04,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:04,073 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:04,073 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:04,080 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:42:04,129 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:42:04,129 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:04,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10100 backedges. 0 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:04,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:04,503 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-09-30 20:42:04,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-30 20:42:04,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-30 20:42:04,504 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:04,504 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand 103 states. [2018-09-30 20:42:05,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:05,064 INFO L93 Difference]: Finished difference Result 209 states and 209 transitions. [2018-09-30 20:42:05,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-30 20:42:05,065 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 204 [2018-09-30 20:42:05,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:05,066 INFO L225 Difference]: With dead ends: 209 [2018-09-30 20:42:05,066 INFO L226 Difference]: Without dead ends: 207 [2018-09-30 20:42:05,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:42:05,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-30 20:42:05,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2018-09-30 20:42:05,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2018-09-30 20:42:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2018-09-30 20:42:05,070 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2018-09-30 20:42:05,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:05,070 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2018-09-30 20:42:05,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-30 20:42:05,070 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2018-09-30 20:42:05,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2018-09-30 20:42:05,072 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:05,072 INFO L375 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1] [2018-09-30 20:42:05,072 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:05,072 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:05,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1800608041, now seen corresponding path program 101 times [2018-09-30 20:42:05,073 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:05,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:05,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:05,073 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:05,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:05,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:05,730 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:05,730 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:05,737 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:42:05,989 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2018-09-30 20:42:05,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:05,995 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:06,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10302 backedges. 0 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:06,478 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:06,479 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-09-30 20:42:06,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-09-30 20:42:06,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-09-30 20:42:06,482 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:06,482 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 104 states. [2018-09-30 20:42:07,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:07,343 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2018-09-30 20:42:07,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-30 20:42:07,343 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 206 [2018-09-30 20:42:07,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:07,344 INFO L225 Difference]: With dead ends: 211 [2018-09-30 20:42:07,344 INFO L226 Difference]: Without dead ends: 209 [2018-09-30 20:42:07,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:42:07,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-09-30 20:42:07,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2018-09-30 20:42:07,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-09-30 20:42:07,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2018-09-30 20:42:07,347 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2018-09-30 20:42:07,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:07,348 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2018-09-30 20:42:07,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-09-30 20:42:07,348 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2018-09-30 20:42:07,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-09-30 20:42:07,348 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:07,348 INFO L375 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1] [2018-09-30 20:42:07,349 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:07,349 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:07,349 INFO L82 PathProgramCache]: Analyzing trace with hash -487440797, now seen corresponding path program 102 times [2018-09-30 20:42:07,349 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:07,349 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:07,349 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:07,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:07,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:08,224 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:08,224 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:08,232 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:42:08,348 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2018-09-30 20:42:08,348 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:08,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 10506 backedges. 0 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:08,717 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:08,717 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-09-30 20:42:08,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-09-30 20:42:08,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-09-30 20:42:08,719 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:08,719 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand 105 states. [2018-09-30 20:42:09,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:09,389 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-09-30 20:42:09,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-09-30 20:42:09,389 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 208 [2018-09-30 20:42:09,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:09,389 INFO L225 Difference]: With dead ends: 213 [2018-09-30 20:42:09,390 INFO L226 Difference]: Without dead ends: 211 [2018-09-30 20:42:09,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:42:09,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-09-30 20:42:09,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-09-30 20:42:09,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-09-30 20:42:09,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2018-09-30 20:42:09,393 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2018-09-30 20:42:09,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:09,394 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2018-09-30 20:42:09,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-09-30 20:42:09,394 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2018-09-30 20:42:09,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2018-09-30 20:42:09,395 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:09,395 INFO L375 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1] [2018-09-30 20:42:09,395 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:09,395 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:09,396 INFO L82 PathProgramCache]: Analyzing trace with hash -279118563, now seen corresponding path program 103 times [2018-09-30 20:42:09,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:09,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:09,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:09,396 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:09,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:10,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:10,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:10,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:10,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10712 backedges. 0 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:10,466 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:10,466 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-09-30 20:42:10,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-09-30 20:42:10,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-09-30 20:42:10,468 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:10,468 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 106 states. [2018-09-30 20:42:11,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:11,034 INFO L93 Difference]: Finished difference Result 215 states and 215 transitions. [2018-09-30 20:42:11,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-09-30 20:42:11,035 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 210 [2018-09-30 20:42:11,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:11,035 INFO L225 Difference]: With dead ends: 215 [2018-09-30 20:42:11,035 INFO L226 Difference]: Without dead ends: 213 [2018-09-30 20:42:11,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:42:11,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-09-30 20:42:11,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-09-30 20:42:11,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-09-30 20:42:11,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-09-30 20:42:11,039 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2018-09-30 20:42:11,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:11,040 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-09-30 20:42:11,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-09-30 20:42:11,040 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-09-30 20:42:11,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-09-30 20:42:11,041 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:11,041 INFO L375 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1] [2018-09-30 20:42:11,041 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:11,041 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:11,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1944914601, now seen corresponding path program 104 times [2018-09-30 20:42:11,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:11,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:11,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:11,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:11,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:11,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:11,689 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:11,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:11,696 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:42:11,749 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:42:11,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:11,753 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10920 backedges. 0 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:12,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:12,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-09-30 20:42:12,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-09-30 20:42:12,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-09-30 20:42:12,199 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:12,199 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 107 states. [2018-09-30 20:42:13,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:13,108 INFO L93 Difference]: Finished difference Result 217 states and 217 transitions. [2018-09-30 20:42:13,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-09-30 20:42:13,108 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 212 [2018-09-30 20:42:13,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:13,109 INFO L225 Difference]: With dead ends: 217 [2018-09-30 20:42:13,109 INFO L226 Difference]: Without dead ends: 215 [2018-09-30 20:42:13,109 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:42:13,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2018-09-30 20:42:13,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2018-09-30 20:42:13,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-09-30 20:42:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2018-09-30 20:42:13,113 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2018-09-30 20:42:13,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:13,114 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2018-09-30 20:42:13,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-09-30 20:42:13,114 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2018-09-30 20:42:13,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2018-09-30 20:42:13,115 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:13,115 INFO L375 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1] [2018-09-30 20:42:13,115 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:13,115 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:13,115 INFO L82 PathProgramCache]: Analyzing trace with hash -752105711, now seen corresponding path program 105 times [2018-09-30 20:42:13,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:13,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:13,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:13,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:13,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:13,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:13,736 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:13,743 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:42:13,873 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2018-09-30 20:42:13,873 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:13,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11130 backedges. 0 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:14,276 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:14,276 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-09-30 20:42:14,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-09-30 20:42:14,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-09-30 20:42:14,277 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:14,278 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand 108 states. [2018-09-30 20:42:15,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:15,188 INFO L93 Difference]: Finished difference Result 219 states and 219 transitions. [2018-09-30 20:42:15,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2018-09-30 20:42:15,188 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 214 [2018-09-30 20:42:15,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:15,189 INFO L225 Difference]: With dead ends: 219 [2018-09-30 20:42:15,189 INFO L226 Difference]: Without dead ends: 217 [2018-09-30 20:42:15,189 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:42:15,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2018-09-30 20:42:15,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2018-09-30 20:42:15,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-09-30 20:42:15,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2018-09-30 20:42:15,193 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2018-09-30 20:42:15,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:15,193 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2018-09-30 20:42:15,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has 108 states. [2018-09-30 20:42:15,193 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2018-09-30 20:42:15,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2018-09-30 20:42:15,194 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:15,194 INFO L375 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1] [2018-09-30 20:42:15,194 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:15,195 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:15,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1219030453, now seen corresponding path program 106 times [2018-09-30 20:42:15,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:15,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:15,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:15,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:15,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:15,843 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:15,843 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:15,851 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:42:15,903 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:42:15,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:15,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 11342 backedges. 0 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:16,318 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:16,318 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 108 [2018-09-30 20:42:16,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-09-30 20:42:16,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-09-30 20:42:16,319 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:16,320 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 109 states. [2018-09-30 20:42:17,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:17,331 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2018-09-30 20:42:17,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2018-09-30 20:42:17,331 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 216 [2018-09-30 20:42:17,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:17,332 INFO L225 Difference]: With dead ends: 221 [2018-09-30 20:42:17,332 INFO L226 Difference]: Without dead ends: 219 [2018-09-30 20:42:17,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:42:17,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-30 20:42:17,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2018-09-30 20:42:17,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2018-09-30 20:42:17,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2018-09-30 20:42:17,336 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2018-09-30 20:42:17,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:17,337 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2018-09-30 20:42:17,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-09-30 20:42:17,337 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2018-09-30 20:42:17,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-09-30 20:42:17,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:17,338 INFO L375 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1] [2018-09-30 20:42:17,338 INFO L423 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:17,338 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:17,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1037858565, now seen corresponding path program 107 times [2018-09-30 20:42:17,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:17,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:17,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:17,339 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:17,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:18,252 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:18,252 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:18,259 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:42:18,390 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2018-09-30 20:42:18,390 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:18,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11556 backedges. 0 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:18,794 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:18,795 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 109 [2018-09-30 20:42:18,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-09-30 20:42:18,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-09-30 20:42:18,796 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:18,796 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 110 states. [2018-09-30 20:42:19,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:19,439 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-09-30 20:42:19,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2018-09-30 20:42:19,439 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 218 [2018-09-30 20:42:19,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:19,440 INFO L225 Difference]: With dead ends: 223 [2018-09-30 20:42:19,440 INFO L226 Difference]: Without dead ends: 221 [2018-09-30 20:42:19,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:42:19,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-30 20:42:19,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-09-30 20:42:19,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-30 20:42:19,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2018-09-30 20:42:19,443 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2018-09-30 20:42:19,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:19,444 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2018-09-30 20:42:19,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-09-30 20:42:19,444 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2018-09-30 20:42:19,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-30 20:42:19,445 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:19,445 INFO L375 BasicCegarLoop]: trace histogram [109, 108, 1, 1, 1] [2018-09-30 20:42:19,445 INFO L423 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:19,445 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:19,446 INFO L82 PathProgramCache]: Analyzing trace with hash 949720383, now seen corresponding path program 108 times [2018-09-30 20:42:19,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:19,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:19,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:19,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:19,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:20,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:20,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:20,219 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:42:20,347 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 109 check-sat command(s) [2018-09-30 20:42:20,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:20,351 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11772 backedges. 0 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:20,769 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:20,769 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 110 [2018-09-30 20:42:20,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 111 states [2018-09-30 20:42:20,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2018-09-30 20:42:20,771 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:20,771 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand 111 states. [2018-09-30 20:42:21,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:21,628 INFO L93 Difference]: Finished difference Result 225 states and 225 transitions. [2018-09-30 20:42:21,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2018-09-30 20:42:21,628 INFO L78 Accepts]: Start accepts. Automaton has 111 states. Word has length 220 [2018-09-30 20:42:21,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:21,629 INFO L225 Difference]: With dead ends: 225 [2018-09-30 20:42:21,629 INFO L226 Difference]: Without dead ends: 223 [2018-09-30 20:42:21,629 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:42:21,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-09-30 20:42:21,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-09-30 20:42:21,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-09-30 20:42:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-09-30 20:42:21,632 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 220 [2018-09-30 20:42:21,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:21,633 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-09-30 20:42:21,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 111 states. [2018-09-30 20:42:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-09-30 20:42:21,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-09-30 20:42:21,633 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:21,634 INFO L375 BasicCegarLoop]: trace histogram [110, 109, 1, 1, 1] [2018-09-30 20:42:21,634 INFO L423 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:21,634 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:21,634 INFO L82 PathProgramCache]: Analyzing trace with hash -2146693895, now seen corresponding path program 109 times [2018-09-30 20:42:21,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:21,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:21,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:21,635 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:21,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:22,304 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:22,304 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:22,311 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:22,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 11990 backedges. 0 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:22,771 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:22,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 111 [2018-09-30 20:42:22,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2018-09-30 20:42:22,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2018-09-30 20:42:22,773 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:22,773 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 112 states. [2018-09-30 20:42:23,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:23,818 INFO L93 Difference]: Finished difference Result 227 states and 227 transitions. [2018-09-30 20:42:23,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2018-09-30 20:42:23,818 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 222 [2018-09-30 20:42:23,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:23,819 INFO L225 Difference]: With dead ends: 227 [2018-09-30 20:42:23,819 INFO L226 Difference]: Without dead ends: 225 [2018-09-30 20:42:23,819 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time [2018-09-30 20:42:23,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2018-09-30 20:42:23,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2018-09-30 20:42:23,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-09-30 20:42:23,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2018-09-30 20:42:23,822 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 222 [2018-09-30 20:42:23,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:23,822 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2018-09-30 20:42:23,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has 112 states. [2018-09-30 20:42:23,822 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2018-09-30 20:42:23,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2018-09-30 20:42:23,823 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:23,823 INFO L375 BasicCegarLoop]: trace histogram [111, 110, 1, 1, 1] [2018-09-30 20:42:23,823 INFO L423 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:23,823 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:23,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1388478925, now seen corresponding path program 110 times [2018-09-30 20:42:23,823 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:23,823 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:23,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:23,824 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:23,824 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:23,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:24,519 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:24,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:24,526 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:42:24,581 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:42:24,581 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:24,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12210 backedges. 0 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:24,992 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:24,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 112 [2018-09-30 20:42:24,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 113 states [2018-09-30 20:42:24,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2018-09-30 20:42:24,995 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:24,995 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand 113 states. [2018-09-30 20:42:26,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:26,071 INFO L93 Difference]: Finished difference Result 229 states and 229 transitions. [2018-09-30 20:42:26,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2018-09-30 20:42:26,072 INFO L78 Accepts]: Start accepts. Automaton has 113 states. Word has length 224 [2018-09-30 20:42:26,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:26,072 INFO L225 Difference]: With dead ends: 229 [2018-09-30 20:42:26,072 INFO L226 Difference]: Without dead ends: 227 [2018-09-30 20:42:26,073 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:42:26,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2018-09-30 20:42:26,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2018-09-30 20:42:26,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2018-09-30 20:42:26,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2018-09-30 20:42:26,076 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 224 [2018-09-30 20:42:26,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:26,077 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2018-09-30 20:42:26,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 113 states. [2018-09-30 20:42:26,077 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2018-09-30 20:42:26,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2018-09-30 20:42:26,077 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:26,077 INFO L375 BasicCegarLoop]: trace histogram [112, 111, 1, 1, 1] [2018-09-30 20:42:26,078 INFO L423 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:26,078 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:26,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1406634221, now seen corresponding path program 111 times [2018-09-30 20:42:26,078 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:26,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:26,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:26,078 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:26,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:26,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12432 backedges. 0 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:26,826 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:26,826 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:26,833 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:42:26,993 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 112 check-sat command(s) [2018-09-30 20:42:26,994 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:26,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12432 backedges. 0 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:27,394 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:27,394 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 113 [2018-09-30 20:42:27,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2018-09-30 20:42:27,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2018-09-30 20:42:27,396 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:27,396 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 114 states. [2018-09-30 20:42:28,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:28,346 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2018-09-30 20:42:28,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2018-09-30 20:42:28,346 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 226 [2018-09-30 20:42:28,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:28,347 INFO L225 Difference]: With dead ends: 231 [2018-09-30 20:42:28,347 INFO L226 Difference]: Without dead ends: 229 [2018-09-30 20:42:28,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:42:28,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-09-30 20:42:28,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2018-09-30 20:42:28,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2018-09-30 20:42:28,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2018-09-30 20:42:28,350 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 226 [2018-09-30 20:42:28,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:28,350 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2018-09-30 20:42:28,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has 114 states. [2018-09-30 20:42:28,350 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2018-09-30 20:42:28,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-09-30 20:42:28,351 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:28,351 INFO L375 BasicCegarLoop]: trace histogram [113, 112, 1, 1, 1] [2018-09-30 20:42:28,351 INFO L423 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:28,351 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:28,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1139159769, now seen corresponding path program 112 times [2018-09-30 20:42:28,351 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:28,351 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:28,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:28,352 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:28,352 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12656 backedges. 0 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:29,157 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:29,157 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:29,165 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:42:29,218 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:42:29,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:29,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:29,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12656 backedges. 0 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:29,645 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:29,645 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 114 [2018-09-30 20:42:29,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-09-30 20:42:29,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-09-30 20:42:29,646 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:29,647 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand 115 states. [2018-09-30 20:42:30,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:30,448 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-09-30 20:42:30,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2018-09-30 20:42:30,449 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 228 [2018-09-30 20:42:30,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:30,449 INFO L225 Difference]: With dead ends: 233 [2018-09-30 20:42:30,449 INFO L226 Difference]: Without dead ends: 231 [2018-09-30 20:42:30,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:42:30,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-30 20:42:30,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-09-30 20:42:30,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-09-30 20:42:30,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2018-09-30 20:42:30,454 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 228 [2018-09-30 20:42:30,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:30,454 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2018-09-30 20:42:30,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-09-30 20:42:30,455 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2018-09-30 20:42:30,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2018-09-30 20:42:30,455 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:30,456 INFO L375 BasicCegarLoop]: trace histogram [114, 113, 1, 1, 1] [2018-09-30 20:42:30,456 INFO L423 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:30,456 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:30,456 INFO L82 PathProgramCache]: Analyzing trace with hash 484174561, now seen corresponding path program 113 times [2018-09-30 20:42:30,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:30,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:30,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:30,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:30,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12882 backedges. 0 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:31,240 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:31,240 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:31,247 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:42:31,438 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 114 check-sat command(s) [2018-09-30 20:42:31,439 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:31,443 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12882 backedges. 0 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:31,993 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:31,993 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 115 [2018-09-30 20:42:31,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2018-09-30 20:42:31,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2018-09-30 20:42:31,995 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:31,995 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand 116 states. [2018-09-30 20:42:32,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:32,890 INFO L93 Difference]: Finished difference Result 235 states and 235 transitions. [2018-09-30 20:42:32,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2018-09-30 20:42:32,891 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 230 [2018-09-30 20:42:32,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:32,891 INFO L225 Difference]: With dead ends: 235 [2018-09-30 20:42:32,891 INFO L226 Difference]: Without dead ends: 233 [2018-09-30 20:42:32,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:42:32,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-09-30 20:42:32,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2018-09-30 20:42:32,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-09-30 20:42:32,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2018-09-30 20:42:32,896 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 230 [2018-09-30 20:42:32,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:32,896 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2018-09-30 20:42:32,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has 116 states. [2018-09-30 20:42:32,896 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2018-09-30 20:42:32,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-09-30 20:42:32,897 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:32,897 INFO L375 BasicCegarLoop]: trace histogram [115, 114, 1, 1, 1] [2018-09-30 20:42:32,897 INFO L423 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:32,897 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:32,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1435337243, now seen corresponding path program 114 times [2018-09-30 20:42:32,897 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:32,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:32,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:32,898 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:32,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:33,856 INFO L134 CoverageAnalysis]: Checked inductivity of 13110 backedges. 0 proven. 13110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:33,857 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:33,857 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:33,866 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:42:34,001 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 115 check-sat command(s) [2018-09-30 20:42:34,001 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:34,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 13110 backedges. 0 proven. 13110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:34,422 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:34,422 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 116 [2018-09-30 20:42:34,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-09-30 20:42:34,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-09-30 20:42:34,424 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:34,424 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 117 states. [2018-09-30 20:42:35,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:35,581 INFO L93 Difference]: Finished difference Result 237 states and 237 transitions. [2018-09-30 20:42:35,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2018-09-30 20:42:35,582 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 232 [2018-09-30 20:42:35,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:35,582 INFO L225 Difference]: With dead ends: 237 [2018-09-30 20:42:35,582 INFO L226 Difference]: Without dead ends: 235 [2018-09-30 20:42:35,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:42:35,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2018-09-30 20:42:35,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2018-09-30 20:42:35,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-09-30 20:42:35,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2018-09-30 20:42:35,585 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 232 [2018-09-30 20:42:35,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:35,586 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2018-09-30 20:42:35,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-09-30 20:42:35,586 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2018-09-30 20:42:35,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2018-09-30 20:42:35,586 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:35,587 INFO L375 BasicCegarLoop]: trace histogram [116, 115, 1, 1, 1] [2018-09-30 20:42:35,587 INFO L423 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:35,587 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:35,587 INFO L82 PathProgramCache]: Analyzing trace with hash 674640597, now seen corresponding path program 115 times [2018-09-30 20:42:35,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:35,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:35,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:35,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:35,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 13340 backedges. 0 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:36,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:36,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:36,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:36,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:36,340 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:36,739 INFO L134 CoverageAnalysis]: Checked inductivity of 13340 backedges. 0 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:36,761 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:36,761 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 117 [2018-09-30 20:42:36,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2018-09-30 20:42:36,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2018-09-30 20:42:36,762 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:36,763 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 118 states. [2018-09-30 20:42:37,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:37,714 INFO L93 Difference]: Finished difference Result 239 states and 239 transitions. [2018-09-30 20:42:37,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2018-09-30 20:42:37,714 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 234 [2018-09-30 20:42:37,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:37,715 INFO L225 Difference]: With dead ends: 239 [2018-09-30 20:42:37,715 INFO L226 Difference]: Without dead ends: 237 [2018-09-30 20:42:37,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:42:37,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2018-09-30 20:42:37,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2018-09-30 20:42:37,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2018-09-30 20:42:37,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2018-09-30 20:42:37,718 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 234 [2018-09-30 20:42:37,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:37,719 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2018-09-30 20:42:37,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 118 states. [2018-09-30 20:42:37,719 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2018-09-30 20:42:37,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2018-09-30 20:42:37,719 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:37,720 INFO L375 BasicCegarLoop]: trace histogram [117, 116, 1, 1, 1] [2018-09-30 20:42:37,720 INFO L423 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:37,720 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:37,720 INFO L82 PathProgramCache]: Analyzing trace with hash -210395889, now seen corresponding path program 116 times [2018-09-30 20:42:37,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:37,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:37,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:37,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:37,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 13572 backedges. 0 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:38,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:38,690 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:38,698 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:42:38,756 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:42:38,756 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:38,760 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 13572 backedges. 0 proven. 13572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:39,188 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:39,188 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 118 [2018-09-30 20:42:39,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 119 states [2018-09-30 20:42:39,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2018-09-30 20:42:39,190 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:39,190 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 119 states. [2018-09-30 20:42:40,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:40,361 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2018-09-30 20:42:40,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2018-09-30 20:42:40,362 INFO L78 Accepts]: Start accepts. Automaton has 119 states. Word has length 236 [2018-09-30 20:42:40,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:40,362 INFO L225 Difference]: With dead ends: 241 [2018-09-30 20:42:40,362 INFO L226 Difference]: Without dead ends: 239 [2018-09-30 20:42:40,362 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:42:40,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-09-30 20:42:40,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2018-09-30 20:42:40,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2018-09-30 20:42:40,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2018-09-30 20:42:40,365 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 236 [2018-09-30 20:42:40,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:40,366 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2018-09-30 20:42:40,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 119 states. [2018-09-30 20:42:40,366 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2018-09-30 20:42:40,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-09-30 20:42:40,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:40,366 INFO L375 BasicCegarLoop]: trace histogram [118, 117, 1, 1, 1] [2018-09-30 20:42:40,367 INFO L423 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:40,367 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:40,367 INFO L82 PathProgramCache]: Analyzing trace with hash -326934327, now seen corresponding path program 117 times [2018-09-30 20:42:40,367 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:40,367 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:40,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:40,368 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:40,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 13806 backedges. 0 proven. 13806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:41,115 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:41,115 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:41,123 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:42:41,279 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 118 check-sat command(s) [2018-09-30 20:42:41,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:41,283 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13806 backedges. 0 proven. 13806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:41,710 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:41,710 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 119 [2018-09-30 20:42:41,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2018-09-30 20:42:41,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2018-09-30 20:42:41,712 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:41,712 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand 120 states. [2018-09-30 20:42:42,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:42,504 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2018-09-30 20:42:42,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2018-09-30 20:42:42,504 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 238 [2018-09-30 20:42:42,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:42,505 INFO L225 Difference]: With dead ends: 243 [2018-09-30 20:42:42,505 INFO L226 Difference]: Without dead ends: 241 [2018-09-30 20:42:42,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:42:42,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-09-30 20:42:42,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-09-30 20:42:42,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-09-30 20:42:42,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2018-09-30 20:42:42,509 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 238 [2018-09-30 20:42:42,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:42,509 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2018-09-30 20:42:42,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has 120 states. [2018-09-30 20:42:42,509 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2018-09-30 20:42:42,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2018-09-30 20:42:42,510 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:42,510 INFO L375 BasicCegarLoop]: trace histogram [119, 118, 1, 1, 1] [2018-09-30 20:42:42,510 INFO L423 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:42,510 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:42,511 INFO L82 PathProgramCache]: Analyzing trace with hash -651223549, now seen corresponding path program 118 times [2018-09-30 20:42:42,511 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:42,511 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:42,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:42,511 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:42,511 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 14042 backedges. 0 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:43,260 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:43,260 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:43,267 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:42:43,328 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:42:43,328 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:43,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:43,944 INFO L134 CoverageAnalysis]: Checked inductivity of 14042 backedges. 0 proven. 14042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:43,964 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:43,964 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 120 [2018-09-30 20:42:43,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-09-30 20:42:43,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-09-30 20:42:43,966 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:43,966 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand 121 states. [2018-09-30 20:42:44,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:44,970 INFO L93 Difference]: Finished difference Result 245 states and 245 transitions. [2018-09-30 20:42:44,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-09-30 20:42:44,970 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 240 [2018-09-30 20:42:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:44,971 INFO L225 Difference]: With dead ends: 245 [2018-09-30 20:42:44,971 INFO L226 Difference]: Without dead ends: 243 [2018-09-30 20:42:44,971 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:42:44,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-30 20:42:44,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-09-30 20:42:44,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-09-30 20:42:44,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2018-09-30 20:42:44,974 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 240 [2018-09-30 20:42:44,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:44,974 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2018-09-30 20:42:44,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-09-30 20:42:44,974 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2018-09-30 20:42:44,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-09-30 20:42:44,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:44,975 INFO L375 BasicCegarLoop]: trace histogram [120, 119, 1, 1, 1] [2018-09-30 20:42:44,975 INFO L423 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:44,976 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:44,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1239446717, now seen corresponding path program 119 times [2018-09-30 20:42:44,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:44,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:44,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:44,976 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:44,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:45,756 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:45,756 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:45,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:45,764 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:42:45,912 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 120 check-sat command(s) [2018-09-30 20:42:45,912 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:45,916 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:46,323 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 14280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:46,343 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:46,344 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 121 [2018-09-30 20:42:46,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-09-30 20:42:46,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-09-30 20:42:46,345 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:46,345 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 122 states. [2018-09-30 20:42:47,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:47,073 INFO L93 Difference]: Finished difference Result 247 states and 247 transitions. [2018-09-30 20:42:47,074 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2018-09-30 20:42:47,074 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 242 [2018-09-30 20:42:47,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:47,074 INFO L225 Difference]: With dead ends: 247 [2018-09-30 20:42:47,074 INFO L226 Difference]: Without dead ends: 245 [2018-09-30 20:42:47,075 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:42:47,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2018-09-30 20:42:47,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2018-09-30 20:42:47,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-09-30 20:42:47,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2018-09-30 20:42:47,078 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 242 [2018-09-30 20:42:47,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:47,078 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2018-09-30 20:42:47,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-09-30 20:42:47,078 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2018-09-30 20:42:47,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-09-30 20:42:47,078 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:47,079 INFO L375 BasicCegarLoop]: trace histogram [121, 120, 1, 1, 1] [2018-09-30 20:42:47,079 INFO L423 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:47,079 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:47,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1402406135, now seen corresponding path program 120 times [2018-09-30 20:42:47,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:47,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:47,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:47,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:47,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:47,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:47,933 INFO L134 CoverageAnalysis]: Checked inductivity of 14520 backedges. 0 proven. 14520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:47,934 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:47,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:47,941 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:42:48,088 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 121 check-sat command(s) [2018-09-30 20:42:48,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:48,092 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 14520 backedges. 0 proven. 14520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:48,548 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:48,548 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 122 [2018-09-30 20:42:48,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 123 states [2018-09-30 20:42:48,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2018-09-30 20:42:48,550 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:48,550 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand 123 states. [2018-09-30 20:42:49,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:49,678 INFO L93 Difference]: Finished difference Result 249 states and 249 transitions. [2018-09-30 20:42:49,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2018-09-30 20:42:49,678 INFO L78 Accepts]: Start accepts. Automaton has 123 states. Word has length 244 [2018-09-30 20:42:49,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:49,679 INFO L225 Difference]: With dead ends: 249 [2018-09-30 20:42:49,679 INFO L226 Difference]: Without dead ends: 247 [2018-09-30 20:42:49,679 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:42:49,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2018-09-30 20:42:49,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2018-09-30 20:42:49,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-09-30 20:42:49,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2018-09-30 20:42:49,682 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 244 [2018-09-30 20:42:49,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:49,682 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2018-09-30 20:42:49,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has 123 states. [2018-09-30 20:42:49,683 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2018-09-30 20:42:49,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-09-30 20:42:49,683 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:49,683 INFO L375 BasicCegarLoop]: trace histogram [122, 121, 1, 1, 1] [2018-09-30 20:42:49,684 INFO L423 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:49,684 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:49,684 INFO L82 PathProgramCache]: Analyzing trace with hash -907383119, now seen corresponding path program 121 times [2018-09-30 20:42:49,684 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:49,684 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:49,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:49,684 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:49,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 14762 backedges. 0 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:50,432 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:50,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:50,440 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:50,503 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 14762 backedges. 0 proven. 14762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:50,991 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:50,992 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 123 [2018-09-30 20:42:50,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 124 states [2018-09-30 20:42:50,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2018-09-30 20:42:50,993 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:50,993 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 124 states. [2018-09-30 20:42:51,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:51,748 INFO L93 Difference]: Finished difference Result 251 states and 251 transitions. [2018-09-30 20:42:51,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2018-09-30 20:42:51,749 INFO L78 Accepts]: Start accepts. Automaton has 124 states. Word has length 246 [2018-09-30 20:42:51,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:51,749 INFO L225 Difference]: With dead ends: 251 [2018-09-30 20:42:51,749 INFO L226 Difference]: Without dead ends: 249 [2018-09-30 20:42:51,750 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:42:51,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-09-30 20:42:51,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2018-09-30 20:42:51,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2018-09-30 20:42:51,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 249 transitions. [2018-09-30 20:42:51,753 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 249 transitions. Word has length 246 [2018-09-30 20:42:51,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:51,753 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 249 transitions. [2018-09-30 20:42:51,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 124 states. [2018-09-30 20:42:51,753 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 249 transitions. [2018-09-30 20:42:51,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-09-30 20:42:51,754 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:51,754 INFO L375 BasicCegarLoop]: trace histogram [123, 122, 1, 1, 1] [2018-09-30 20:42:51,754 INFO L423 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:51,754 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:51,754 INFO L82 PathProgramCache]: Analyzing trace with hash -116764181, now seen corresponding path program 122 times [2018-09-30 20:42:51,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:51,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:51,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:51,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:42:51,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:51,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:52,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15006 backedges. 0 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:52,507 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:52,507 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:52,515 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:42:52,577 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:42:52,577 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:52,582 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 15006 backedges. 0 proven. 15006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:53,056 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:53,056 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 124 [2018-09-30 20:42:53,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 125 states [2018-09-30 20:42:53,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2018-09-30 20:42:53,058 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:53,058 INFO L87 Difference]: Start difference. First operand 249 states and 249 transitions. Second operand 125 states. [2018-09-30 20:42:54,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:54,209 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-09-30 20:42:54,210 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2018-09-30 20:42:54,210 INFO L78 Accepts]: Start accepts. Automaton has 125 states. Word has length 248 [2018-09-30 20:42:54,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:54,210 INFO L225 Difference]: With dead ends: 253 [2018-09-30 20:42:54,210 INFO L226 Difference]: Without dead ends: 251 [2018-09-30 20:42:54,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:42:54,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-09-30 20:42:54,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-09-30 20:42:54,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-09-30 20:42:54,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2018-09-30 20:42:54,214 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 248 [2018-09-30 20:42:54,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:54,214 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2018-09-30 20:42:54,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has 125 states. [2018-09-30 20:42:54,214 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2018-09-30 20:42:54,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2018-09-30 20:42:54,215 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:54,215 INFO L375 BasicCegarLoop]: trace histogram [124, 123, 1, 1, 1] [2018-09-30 20:42:54,216 INFO L423 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:54,216 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:54,216 INFO L82 PathProgramCache]: Analyzing trace with hash -541176155, now seen corresponding path program 123 times [2018-09-30 20:42:54,216 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:54,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:54,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:54,217 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:54,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 15252 backedges. 0 proven. 15252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:54,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:54,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:54,976 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:42:55,145 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 124 check-sat command(s) [2018-09-30 20:42:55,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:55,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 15252 backedges. 0 proven. 15252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:55,588 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:55,588 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 125 [2018-09-30 20:42:55,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 126 states [2018-09-30 20:42:55,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2018-09-30 20:42:55,590 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:55,590 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 126 states. [2018-09-30 20:42:56,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:56,670 INFO L93 Difference]: Finished difference Result 255 states and 255 transitions. [2018-09-30 20:42:56,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2018-09-30 20:42:56,670 INFO L78 Accepts]: Start accepts. Automaton has 126 states. Word has length 250 [2018-09-30 20:42:56,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:56,671 INFO L225 Difference]: With dead ends: 255 [2018-09-30 20:42:56,671 INFO L226 Difference]: Without dead ends: 253 [2018-09-30 20:42:56,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time [2018-09-30 20:42:56,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-09-30 20:42:56,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-09-30 20:42:56,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-09-30 20:42:56,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2018-09-30 20:42:56,674 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 250 [2018-09-30 20:42:56,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:56,674 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2018-09-30 20:42:56,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 126 states. [2018-09-30 20:42:56,674 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2018-09-30 20:42:56,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-09-30 20:42:56,675 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:56,675 INFO L375 BasicCegarLoop]: trace histogram [125, 124, 1, 1, 1] [2018-09-30 20:42:56,675 INFO L423 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:56,675 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:56,675 INFO L82 PathProgramCache]: Analyzing trace with hash -379190049, now seen corresponding path program 124 times [2018-09-30 20:42:56,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:56,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:56,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:56,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:56,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:42:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 15500 backedges. 0 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:57,485 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:42:57,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:42:57,492 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:42:57,554 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:42:57,554 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:42:57,559 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:42:57,994 INFO L134 CoverageAnalysis]: Checked inductivity of 15500 backedges. 0 proven. 15500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:42:58,014 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:42:58,014 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 126 [2018-09-30 20:42:58,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-09-30 20:42:58,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-09-30 20:42:58,016 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:42:58,016 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 127 states. [2018-09-30 20:42:59,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:42:59,329 INFO L93 Difference]: Finished difference Result 257 states and 257 transitions. [2018-09-30 20:42:59,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2018-09-30 20:42:59,330 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 252 [2018-09-30 20:42:59,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:42:59,330 INFO L225 Difference]: With dead ends: 257 [2018-09-30 20:42:59,330 INFO L226 Difference]: Without dead ends: 255 [2018-09-30 20:42:59,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:42:59,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-09-30 20:42:59,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2018-09-30 20:42:59,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-09-30 20:42:59,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2018-09-30 20:42:59,334 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 252 [2018-09-30 20:42:59,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:42:59,334 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2018-09-30 20:42:59,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-09-30 20:42:59,334 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2018-09-30 20:42:59,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2018-09-30 20:42:59,335 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:42:59,335 INFO L375 BasicCegarLoop]: trace histogram [126, 125, 1, 1, 1] [2018-09-30 20:42:59,335 INFO L423 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:42:59,335 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:42:59,335 INFO L82 PathProgramCache]: Analyzing trace with hash 670635161, now seen corresponding path program 125 times [2018-09-30 20:42:59,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:42:59,336 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:42:59,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:59,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:42:59,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:42:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:00,124 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:00,124 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:00,131 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:43:00,285 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 126 check-sat command(s) [2018-09-30 20:43:00,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:00,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 15750 backedges. 0 proven. 15750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:00,750 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:00,750 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 127 [2018-09-30 20:43:00,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 128 states [2018-09-30 20:43:00,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2018-09-30 20:43:00,752 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:00,753 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand 128 states. [2018-09-30 20:43:02,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:02,014 INFO L93 Difference]: Finished difference Result 259 states and 259 transitions. [2018-09-30 20:43:02,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2018-09-30 20:43:02,015 INFO L78 Accepts]: Start accepts. Automaton has 128 states. Word has length 254 [2018-09-30 20:43:02,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:02,015 INFO L225 Difference]: With dead ends: 259 [2018-09-30 20:43:02,015 INFO L226 Difference]: Without dead ends: 257 [2018-09-30 20:43:02,015 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:43:02,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2018-09-30 20:43:02,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2018-09-30 20:43:02,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2018-09-30 20:43:02,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2018-09-30 20:43:02,019 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 254 [2018-09-30 20:43:02,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:02,020 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2018-09-30 20:43:02,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has 128 states. [2018-09-30 20:43:02,020 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2018-09-30 20:43:02,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2018-09-30 20:43:02,021 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:02,021 INFO L375 BasicCegarLoop]: trace histogram [127, 126, 1, 1, 1] [2018-09-30 20:43:02,021 INFO L423 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:02,021 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:02,021 INFO L82 PathProgramCache]: Analyzing trace with hash 235347411, now seen corresponding path program 126 times [2018-09-30 20:43:02,022 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:02,022 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:02,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:02,022 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:02,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16002 backedges. 0 proven. 16002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:02,916 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:02,916 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:02,924 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:43:03,081 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 127 check-sat command(s) [2018-09-30 20:43:03,081 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:03,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:03,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16002 backedges. 0 proven. 16002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:03,532 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:03,532 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 128 [2018-09-30 20:43:03,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-09-30 20:43:03,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-09-30 20:43:03,534 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:03,534 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 129 states. [2018-09-30 20:43:04,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:04,618 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2018-09-30 20:43:04,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2018-09-30 20:43:04,618 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 256 [2018-09-30 20:43:04,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:04,619 INFO L225 Difference]: With dead ends: 261 [2018-09-30 20:43:04,619 INFO L226 Difference]: Without dead ends: 259 [2018-09-30 20:43:04,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:43:04,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-09-30 20:43:04,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2018-09-30 20:43:04,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-30 20:43:04,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2018-09-30 20:43:04,623 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 256 [2018-09-30 20:43:04,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:04,624 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2018-09-30 20:43:04,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-09-30 20:43:04,624 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2018-09-30 20:43:04,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-09-30 20:43:04,624 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:04,625 INFO L375 BasicCegarLoop]: trace histogram [128, 127, 1, 1, 1] [2018-09-30 20:43:04,625 INFO L423 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:04,625 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:04,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1464352627, now seen corresponding path program 127 times [2018-09-30 20:43:04,625 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:04,625 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:04,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:04,626 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:04,626 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16256 backedges. 0 proven. 16256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:05,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:05,427 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:05,438 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:43:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:05,502 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:05,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16256 backedges. 0 proven. 16256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:05,998 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:05,999 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 129 [2018-09-30 20:43:05,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 130 states [2018-09-30 20:43:06,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2018-09-30 20:43:06,000 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:06,001 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand 130 states. [2018-09-30 20:43:07,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:07,151 INFO L93 Difference]: Finished difference Result 263 states and 263 transitions. [2018-09-30 20:43:07,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2018-09-30 20:43:07,152 INFO L78 Accepts]: Start accepts. Automaton has 130 states. Word has length 258 [2018-09-30 20:43:07,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:07,153 INFO L225 Difference]: With dead ends: 263 [2018-09-30 20:43:07,153 INFO L226 Difference]: Without dead ends: 261 [2018-09-30 20:43:07,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:43:07,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-09-30 20:43:07,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-09-30 20:43:07,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-09-30 20:43:07,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 261 transitions. [2018-09-30 20:43:07,157 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 261 transitions. Word has length 258 [2018-09-30 20:43:07,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:07,157 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 261 transitions. [2018-09-30 20:43:07,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has 130 states. [2018-09-30 20:43:07,157 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 261 transitions. [2018-09-30 20:43:07,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2018-09-30 20:43:07,158 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:07,158 INFO L375 BasicCegarLoop]: trace histogram [129, 128, 1, 1, 1] [2018-09-30 20:43:07,158 INFO L423 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:07,158 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:07,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1506450631, now seen corresponding path program 128 times [2018-09-30 20:43:07,159 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:07,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:07,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:07,160 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:43:07,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:07,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16512 backedges. 0 proven. 16512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:07,982 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:07,982 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:07,993 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:43:08,055 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:43:08,055 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:08,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16512 backedges. 0 proven. 16512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:08,522 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:08,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 130 [2018-09-30 20:43:08,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 131 states [2018-09-30 20:43:08,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2018-09-30 20:43:08,524 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:08,524 INFO L87 Difference]: Start difference. First operand 261 states and 261 transitions. Second operand 131 states. [2018-09-30 20:43:09,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:09,788 INFO L93 Difference]: Finished difference Result 265 states and 265 transitions. [2018-09-30 20:43:09,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2018-09-30 20:43:09,788 INFO L78 Accepts]: Start accepts. Automaton has 131 states. Word has length 260 [2018-09-30 20:43:09,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:09,789 INFO L225 Difference]: With dead ends: 265 [2018-09-30 20:43:09,789 INFO L226 Difference]: Without dead ends: 263 [2018-09-30 20:43:09,789 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:43:09,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-09-30 20:43:09,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-09-30 20:43:09,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-09-30 20:43:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-09-30 20:43:09,792 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 260 [2018-09-30 20:43:09,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:09,793 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-09-30 20:43:09,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 131 states. [2018-09-30 20:43:09,793 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-09-30 20:43:09,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-09-30 20:43:09,794 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:09,794 INFO L375 BasicCegarLoop]: trace histogram [130, 129, 1, 1, 1] [2018-09-30 20:43:09,794 INFO L423 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:09,794 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:09,795 INFO L82 PathProgramCache]: Analyzing trace with hash 295129729, now seen corresponding path program 129 times [2018-09-30 20:43:09,795 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:09,795 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:09,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:09,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:09,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:10,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16770 backedges. 0 proven. 16770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:10,634 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:10,634 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:10,640 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:43:10,839 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 130 check-sat command(s) [2018-09-30 20:43:10,839 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:10,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:11,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16770 backedges. 0 proven. 16770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:11,305 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:11,305 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131] total 131 [2018-09-30 20:43:11,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 132 states [2018-09-30 20:43:11,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2018-09-30 20:43:11,307 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:11,307 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 132 states. [2018-09-30 20:43:12,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:12,709 INFO L93 Difference]: Finished difference Result 267 states and 267 transitions. [2018-09-30 20:43:12,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2018-09-30 20:43:12,709 INFO L78 Accepts]: Start accepts. Automaton has 132 states. Word has length 262 [2018-09-30 20:43:12,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:12,710 INFO L225 Difference]: With dead ends: 267 [2018-09-30 20:43:12,710 INFO L226 Difference]: Without dead ends: 265 [2018-09-30 20:43:12,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:43:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2018-09-30 20:43:12,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2018-09-30 20:43:12,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-09-30 20:43:12,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2018-09-30 20:43:12,714 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 262 [2018-09-30 20:43:12,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:12,714 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2018-09-30 20:43:12,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has 132 states. [2018-09-30 20:43:12,714 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2018-09-30 20:43:12,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2018-09-30 20:43:12,715 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:12,715 INFO L375 BasicCegarLoop]: trace histogram [131, 130, 1, 1, 1] [2018-09-30 20:43:12,715 INFO L423 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:12,715 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:12,715 INFO L82 PathProgramCache]: Analyzing trace with hash 151880123, now seen corresponding path program 130 times [2018-09-30 20:43:12,715 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:12,715 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:12,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:12,716 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:12,716 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 17030 backedges. 0 proven. 17030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:13,573 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:13,573 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:13,579 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:43:13,652 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:43:13,652 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:13,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 17030 backedges. 0 proven. 17030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:14,165 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:14,166 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 132] total 132 [2018-09-30 20:43:14,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 133 states [2018-09-30 20:43:14,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2018-09-30 20:43:14,168 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:14,168 INFO L87 Difference]: Start difference. First operand 265 states and 265 transitions. Second operand 133 states. [2018-09-30 20:43:15,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:15,704 INFO L93 Difference]: Finished difference Result 269 states and 269 transitions. [2018-09-30 20:43:15,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2018-09-30 20:43:15,704 INFO L78 Accepts]: Start accepts. Automaton has 133 states. Word has length 264 [2018-09-30 20:43:15,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:15,705 INFO L225 Difference]: With dead ends: 269 [2018-09-30 20:43:15,705 INFO L226 Difference]: Without dead ends: 267 [2018-09-30 20:43:15,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:43:15,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-30 20:43:15,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2018-09-30 20:43:15,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2018-09-30 20:43:15,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2018-09-30 20:43:15,708 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 264 [2018-09-30 20:43:15,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:15,708 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2018-09-30 20:43:15,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 133 states. [2018-09-30 20:43:15,709 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2018-09-30 20:43:15,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2018-09-30 20:43:15,709 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:15,709 INFO L375 BasicCegarLoop]: trace histogram [132, 131, 1, 1, 1] [2018-09-30 20:43:15,709 INFO L423 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:15,710 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:15,710 INFO L82 PathProgramCache]: Analyzing trace with hash -72037771, now seen corresponding path program 131 times [2018-09-30 20:43:15,710 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:15,710 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:15,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:15,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:15,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 17292 backedges. 0 proven. 17292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:16,607 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:16,607 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:16,614 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:43:16,777 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 132 check-sat command(s) [2018-09-30 20:43:16,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:16,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 17292 backedges. 0 proven. 17292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:17,243 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:17,244 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 133 [2018-09-30 20:43:17,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-09-30 20:43:17,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-09-30 20:43:17,245 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:17,245 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand 134 states. [2018-09-30 20:43:18,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:18,083 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2018-09-30 20:43:18,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2018-09-30 20:43:18,083 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 266 [2018-09-30 20:43:18,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:18,084 INFO L225 Difference]: With dead ends: 271 [2018-09-30 20:43:18,084 INFO L226 Difference]: Without dead ends: 269 [2018-09-30 20:43:18,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time [2018-09-30 20:43:18,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-09-30 20:43:18,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2018-09-30 20:43:18,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2018-09-30 20:43:18,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2018-09-30 20:43:18,087 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 266 [2018-09-30 20:43:18,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:18,087 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2018-09-30 20:43:18,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-09-30 20:43:18,087 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2018-09-30 20:43:18,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2018-09-30 20:43:18,088 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:18,088 INFO L375 BasicCegarLoop]: trace histogram [133, 132, 1, 1, 1] [2018-09-30 20:43:18,088 INFO L423 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:18,088 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:18,088 INFO L82 PathProgramCache]: Analyzing trace with hash -508769105, now seen corresponding path program 132 times [2018-09-30 20:43:18,089 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:18,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:18,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:18,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:18,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:18,946 INFO L134 CoverageAnalysis]: Checked inductivity of 17556 backedges. 0 proven. 17556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:18,947 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:18,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:18,954 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:43:19,123 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 133 check-sat command(s) [2018-09-30 20:43:19,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:19,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 17556 backedges. 0 proven. 17556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:19,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:19,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134] total 134 [2018-09-30 20:43:19,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 135 states [2018-09-30 20:43:19,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2018-09-30 20:43:19,864 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:19,865 INFO L87 Difference]: Start difference. First operand 269 states and 269 transitions. Second operand 135 states. [2018-09-30 20:43:21,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:21,352 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2018-09-30 20:43:21,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-09-30 20:43:21,352 INFO L78 Accepts]: Start accepts. Automaton has 135 states. Word has length 268 [2018-09-30 20:43:21,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:21,353 INFO L225 Difference]: With dead ends: 273 [2018-09-30 20:43:21,353 INFO L226 Difference]: Without dead ends: 271 [2018-09-30 20:43:21,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-09-30 20:43:21,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2018-09-30 20:43:21,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2018-09-30 20:43:21,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2018-09-30 20:43:21,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2018-09-30 20:43:21,356 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 268 [2018-09-30 20:43:21,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:21,356 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2018-09-30 20:43:21,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has 135 states. [2018-09-30 20:43:21,356 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2018-09-30 20:43:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2018-09-30 20:43:21,357 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:21,357 INFO L375 BasicCegarLoop]: trace histogram [134, 133, 1, 1, 1] [2018-09-30 20:43:21,357 INFO L423 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:21,357 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:21,358 INFO L82 PathProgramCache]: Analyzing trace with hash 699213929, now seen corresponding path program 133 times [2018-09-30 20:43:21,358 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:21,358 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:21,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:21,358 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:21,358 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 17822 backedges. 0 proven. 17822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:22,238 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:22,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:22,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:43:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:22,313 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:22,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17822 backedges. 0 proven. 17822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:22,806 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:22,807 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [135, 135] total 135 [2018-09-30 20:43:22,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 136 states [2018-09-30 20:43:22,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2018-09-30 20:43:22,809 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:22,809 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand 136 states. [2018-09-30 20:43:23,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:23,992 INFO L93 Difference]: Finished difference Result 275 states and 275 transitions. [2018-09-30 20:43:23,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2018-09-30 20:43:23,992 INFO L78 Accepts]: Start accepts. Automaton has 136 states. Word has length 270 [2018-09-30 20:43:23,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:23,993 INFO L225 Difference]: With dead ends: 275 [2018-09-30 20:43:23,993 INFO L226 Difference]: Without dead ends: 273 [2018-09-30 20:43:23,993 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:43:23,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-09-30 20:43:23,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2018-09-30 20:43:23,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2018-09-30 20:43:23,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 273 transitions. [2018-09-30 20:43:23,997 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 273 transitions. Word has length 270 [2018-09-30 20:43:23,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:23,997 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 273 transitions. [2018-09-30 20:43:23,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has 136 states. [2018-09-30 20:43:23,997 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 273 transitions. [2018-09-30 20:43:23,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-09-30 20:43:23,998 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:23,998 INFO L375 BasicCegarLoop]: trace histogram [135, 134, 1, 1, 1] [2018-09-30 20:43:23,998 INFO L423 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:23,998 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:23,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1929739683, now seen corresponding path program 134 times [2018-09-30 20:43:23,999 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:23,999 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:23,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:23,999 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:43:23,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 18090 backedges. 0 proven. 18090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:25,043 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:25,043 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:25,051 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:43:25,116 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:43:25,116 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:25,120 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18090 backedges. 0 proven. 18090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:25,609 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:25,609 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [136, 136] total 136 [2018-09-30 20:43:25,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 137 states [2018-09-30 20:43:25,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2018-09-30 20:43:25,611 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:25,611 INFO L87 Difference]: Start difference. First operand 273 states and 273 transitions. Second operand 137 states. [2018-09-30 20:43:27,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:27,260 INFO L93 Difference]: Finished difference Result 277 states and 277 transitions. [2018-09-30 20:43:27,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2018-09-30 20:43:27,260 INFO L78 Accepts]: Start accepts. Automaton has 137 states. Word has length 272 [2018-09-30 20:43:27,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:27,261 INFO L225 Difference]: With dead ends: 277 [2018-09-30 20:43:27,261 INFO L226 Difference]: Without dead ends: 275 [2018-09-30 20:43:27,261 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:43:27,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2018-09-30 20:43:27,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2018-09-30 20:43:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2018-09-30 20:43:27,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2018-09-30 20:43:27,265 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 272 [2018-09-30 20:43:27,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:27,266 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2018-09-30 20:43:27,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 137 states. [2018-09-30 20:43:27,266 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2018-09-30 20:43:27,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2018-09-30 20:43:27,267 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:27,267 INFO L375 BasicCegarLoop]: trace histogram [136, 135, 1, 1, 1] [2018-09-30 20:43:27,267 INFO L423 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:27,267 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:27,268 INFO L82 PathProgramCache]: Analyzing trace with hash -945984419, now seen corresponding path program 135 times [2018-09-30 20:43:27,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:27,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:27,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:27,268 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:27,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 18360 backedges. 0 proven. 18360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:28,268 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:28,268 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:28,275 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:43:28,484 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 136 check-sat command(s) [2018-09-30 20:43:28,484 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:28,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18360 backedges. 0 proven. 18360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:28,983 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:28,984 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [137, 137] total 137 [2018-09-30 20:43:28,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 138 states [2018-09-30 20:43:28,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2018-09-30 20:43:28,986 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:28,986 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand 138 states. [2018-09-30 20:43:30,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:30,049 INFO L93 Difference]: Finished difference Result 279 states and 279 transitions. [2018-09-30 20:43:30,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2018-09-30 20:43:30,050 INFO L78 Accepts]: Start accepts. Automaton has 138 states. Word has length 274 [2018-09-30 20:43:30,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:30,050 INFO L225 Difference]: With dead ends: 279 [2018-09-30 20:43:30,050 INFO L226 Difference]: Without dead ends: 277 [2018-09-30 20:43:30,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:43:30,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2018-09-30 20:43:30,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2018-09-30 20:43:30,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2018-09-30 20:43:30,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2018-09-30 20:43:30,054 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 274 [2018-09-30 20:43:30,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:30,054 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2018-09-30 20:43:30,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has 138 states. [2018-09-30 20:43:30,054 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2018-09-30 20:43:30,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2018-09-30 20:43:30,055 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:30,055 INFO L375 BasicCegarLoop]: trace histogram [137, 136, 1, 1, 1] [2018-09-30 20:43:30,055 INFO L423 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:30,055 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:30,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1442092183, now seen corresponding path program 136 times [2018-09-30 20:43:30,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:30,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:30,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:30,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:30,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:30,969 INFO L134 CoverageAnalysis]: Checked inductivity of 18632 backedges. 0 proven. 18632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:30,969 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:30,969 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:30,976 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:43:31,041 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:43:31,041 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:31,045 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 18632 backedges. 0 proven. 18632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:31,531 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:31,531 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [138, 138] total 138 [2018-09-30 20:43:31,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-09-30 20:43:31,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-09-30 20:43:31,533 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:31,533 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand 139 states. [2018-09-30 20:43:32,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:32,934 INFO L93 Difference]: Finished difference Result 281 states and 281 transitions. [2018-09-30 20:43:32,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2018-09-30 20:43:32,934 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 276 [2018-09-30 20:43:32,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:32,935 INFO L225 Difference]: With dead ends: 281 [2018-09-30 20:43:32,935 INFO L226 Difference]: Without dead ends: 279 [2018-09-30 20:43:32,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:43:32,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-09-30 20:43:32,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2018-09-30 20:43:32,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2018-09-30 20:43:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 279 transitions. [2018-09-30 20:43:32,938 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 279 transitions. Word has length 276 [2018-09-30 20:43:32,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:32,938 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 279 transitions. [2018-09-30 20:43:32,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-09-30 20:43:32,939 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 279 transitions. [2018-09-30 20:43:32,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2018-09-30 20:43:32,939 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:32,939 INFO L375 BasicCegarLoop]: trace histogram [138, 137, 1, 1, 1] [2018-09-30 20:43:32,940 INFO L423 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:32,940 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:32,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1423796655, now seen corresponding path program 137 times [2018-09-30 20:43:32,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:32,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:32,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:32,940 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:32,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18906 backedges. 0 proven. 18906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:33,852 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:33,852 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:33,859 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:43:34,043 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 138 check-sat command(s) [2018-09-30 20:43:34,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:34,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18906 backedges. 0 proven. 18906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:34,573 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:34,574 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139] total 139 [2018-09-30 20:43:34,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 140 states [2018-09-30 20:43:34,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2018-09-30 20:43:34,575 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:34,575 INFO L87 Difference]: Start difference. First operand 279 states and 279 transitions. Second operand 140 states. [2018-09-30 20:43:36,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:36,388 INFO L93 Difference]: Finished difference Result 283 states and 283 transitions. [2018-09-30 20:43:36,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2018-09-30 20:43:36,389 INFO L78 Accepts]: Start accepts. Automaton has 140 states. Word has length 278 [2018-09-30 20:43:36,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:36,389 INFO L225 Difference]: With dead ends: 283 [2018-09-30 20:43:36,389 INFO L226 Difference]: Without dead ends: 281 [2018-09-30 20:43:36,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:43:36,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-09-30 20:43:36,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2018-09-30 20:43:36,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2018-09-30 20:43:36,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 281 transitions. [2018-09-30 20:43:36,393 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 281 transitions. Word has length 278 [2018-09-30 20:43:36,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:36,393 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 281 transitions. [2018-09-30 20:43:36,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 140 states. [2018-09-30 20:43:36,393 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 281 transitions. [2018-09-30 20:43:36,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2018-09-30 20:43:36,394 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:36,394 INFO L375 BasicCegarLoop]: trace histogram [139, 138, 1, 1, 1] [2018-09-30 20:43:36,394 INFO L423 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:36,394 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:36,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1826034059, now seen corresponding path program 138 times [2018-09-30 20:43:36,394 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:36,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:36,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:36,395 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:36,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 19182 backedges. 0 proven. 19182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:37,309 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:37,309 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:37,317 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:43:37,499 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 139 check-sat command(s) [2018-09-30 20:43:37,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:37,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 19182 backedges. 0 proven. 19182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:38,020 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:38,020 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [140, 140] total 140 [2018-09-30 20:43:38,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-09-30 20:43:38,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-09-30 20:43:38,022 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:38,022 INFO L87 Difference]: Start difference. First operand 281 states and 281 transitions. Second operand 141 states. [2018-09-30 20:43:39,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:39,284 INFO L93 Difference]: Finished difference Result 285 states and 285 transitions. [2018-09-30 20:43:39,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2018-09-30 20:43:39,284 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 280 [2018-09-30 20:43:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:39,285 INFO L225 Difference]: With dead ends: 285 [2018-09-30 20:43:39,285 INFO L226 Difference]: Without dead ends: 283 [2018-09-30 20:43:39,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:43:39,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-09-30 20:43:39,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-09-30 20:43:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-09-30 20:43:39,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2018-09-30 20:43:39,288 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 280 [2018-09-30 20:43:39,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:39,288 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2018-09-30 20:43:39,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-09-30 20:43:39,289 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2018-09-30 20:43:39,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-09-30 20:43:39,289 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:39,289 INFO L375 BasicCegarLoop]: trace histogram [140, 139, 1, 1, 1] [2018-09-30 20:43:39,290 INFO L423 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:39,290 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:39,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1822841275, now seen corresponding path program 139 times [2018-09-30 20:43:39,290 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:39,290 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:39,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:39,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:39,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:40,431 INFO L134 CoverageAnalysis]: Checked inductivity of 19460 backedges. 0 proven. 19460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:40,431 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:40,431 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:40,439 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:43:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:40,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:41,010 INFO L134 CoverageAnalysis]: Checked inductivity of 19460 backedges. 0 proven. 19460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:41,029 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:41,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [141, 141] total 141 [2018-09-30 20:43:41,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 142 states [2018-09-30 20:43:41,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2018-09-30 20:43:41,032 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:41,032 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 142 states. [2018-09-30 20:43:42,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:42,075 INFO L93 Difference]: Finished difference Result 287 states and 287 transitions. [2018-09-30 20:43:42,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2018-09-30 20:43:42,076 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 282 [2018-09-30 20:43:42,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:42,076 INFO L225 Difference]: With dead ends: 287 [2018-09-30 20:43:42,076 INFO L226 Difference]: Without dead ends: 285 [2018-09-30 20:43:42,077 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:43:42,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2018-09-30 20:43:42,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2018-09-30 20:43:42,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2018-09-30 20:43:42,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 285 transitions. [2018-09-30 20:43:42,080 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 285 transitions. Word has length 282 [2018-09-30 20:43:42,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:42,080 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 285 transitions. [2018-09-30 20:43:42,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 142 states. [2018-09-30 20:43:42,080 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 285 transitions. [2018-09-30 20:43:42,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2018-09-30 20:43:42,081 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:42,081 INFO L375 BasicCegarLoop]: trace histogram [141, 140, 1, 1, 1] [2018-09-30 20:43:42,081 INFO L423 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:42,081 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:42,081 INFO L82 PathProgramCache]: Analyzing trace with hash 596243583, now seen corresponding path program 140 times [2018-09-30 20:43:42,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:42,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:42,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:42,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:43:42,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:42,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 19740 backedges. 0 proven. 19740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:43,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:43,023 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:43,031 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:43:43,103 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:43:43,103 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:43,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 19740 backedges. 0 proven. 19740 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:43,625 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:43,626 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [142, 142] total 142 [2018-09-30 20:43:43,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 143 states [2018-09-30 20:43:43,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2018-09-30 20:43:43,628 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:43,628 INFO L87 Difference]: Start difference. First operand 285 states and 285 transitions. Second operand 143 states. [2018-09-30 20:43:44,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:44,718 INFO L93 Difference]: Finished difference Result 289 states and 289 transitions. [2018-09-30 20:43:44,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2018-09-30 20:43:44,718 INFO L78 Accepts]: Start accepts. Automaton has 143 states. Word has length 284 [2018-09-30 20:43:44,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:44,719 INFO L225 Difference]: With dead ends: 289 [2018-09-30 20:43:44,719 INFO L226 Difference]: Without dead ends: 287 [2018-09-30 20:43:44,719 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time [2018-09-30 20:43:44,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2018-09-30 20:43:44,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2018-09-30 20:43:44,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2018-09-30 20:43:44,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2018-09-30 20:43:44,723 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 284 [2018-09-30 20:43:44,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:44,724 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2018-09-30 20:43:44,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 143 states. [2018-09-30 20:43:44,724 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2018-09-30 20:43:44,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2018-09-30 20:43:44,725 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:44,725 INFO L375 BasicCegarLoop]: trace histogram [142, 141, 1, 1, 1] [2018-09-30 20:43:44,725 INFO L423 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:44,725 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:44,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1759484985, now seen corresponding path program 141 times [2018-09-30 20:43:44,725 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:44,726 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:44,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:44,726 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:44,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 20022 backedges. 0 proven. 20022 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:45,870 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:45,870 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:45,877 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:43:46,092 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 142 check-sat command(s) [2018-09-30 20:43:46,092 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:46,097 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:46,582 INFO L134 CoverageAnalysis]: Checked inductivity of 20022 backedges. 0 proven. 20022 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:46,602 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:46,603 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [143, 143] total 143 [2018-09-30 20:43:46,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 144 states [2018-09-30 20:43:46,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2018-09-30 20:43:46,605 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:46,605 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 144 states. [2018-09-30 20:43:47,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:47,699 INFO L93 Difference]: Finished difference Result 291 states and 291 transitions. [2018-09-30 20:43:47,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-09-30 20:43:47,699 INFO L78 Accepts]: Start accepts. Automaton has 144 states. Word has length 286 [2018-09-30 20:43:47,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:47,700 INFO L225 Difference]: With dead ends: 291 [2018-09-30 20:43:47,700 INFO L226 Difference]: Without dead ends: 289 [2018-09-30 20:43:47,700 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-09-30 20:43:47,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2018-09-30 20:43:47,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2018-09-30 20:43:47,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2018-09-30 20:43:47,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 289 transitions. [2018-09-30 20:43:47,704 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 289 transitions. Word has length 286 [2018-09-30 20:43:47,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:47,704 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 289 transitions. [2018-09-30 20:43:47,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 144 states. [2018-09-30 20:43:47,704 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 289 transitions. [2018-09-30 20:43:47,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2018-09-30 20:43:47,705 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:47,705 INFO L375 BasicCegarLoop]: trace histogram [143, 142, 1, 1, 1] [2018-09-30 20:43:47,705 INFO L423 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:47,706 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:47,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1351991949, now seen corresponding path program 142 times [2018-09-30 20:43:47,706 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:47,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:47,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:47,706 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:47,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 20306 backedges. 0 proven. 20306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:48,690 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:48,690 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:48,698 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:43:48,771 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:43:48,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:48,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20306 backedges. 0 proven. 20306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:49,312 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:49,312 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [144, 144] total 144 [2018-09-30 20:43:49,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-09-30 20:43:49,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-09-30 20:43:49,314 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:49,315 INFO L87 Difference]: Start difference. First operand 289 states and 289 transitions. Second operand 145 states. [2018-09-30 20:43:50,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:50,482 INFO L93 Difference]: Finished difference Result 293 states and 293 transitions. [2018-09-30 20:43:50,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2018-09-30 20:43:50,482 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 288 [2018-09-30 20:43:50,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:50,483 INFO L225 Difference]: With dead ends: 293 [2018-09-30 20:43:50,483 INFO L226 Difference]: Without dead ends: 291 [2018-09-30 20:43:50,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:43:50,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-09-30 20:43:50,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2018-09-30 20:43:50,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2018-09-30 20:43:50,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 291 transitions. [2018-09-30 20:43:50,488 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 291 transitions. Word has length 288 [2018-09-30 20:43:50,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:50,488 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 291 transitions. [2018-09-30 20:43:50,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-09-30 20:43:50,489 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 291 transitions. [2018-09-30 20:43:50,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2018-09-30 20:43:50,489 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:50,489 INFO L375 BasicCegarLoop]: trace histogram [144, 143, 1, 1, 1] [2018-09-30 20:43:50,490 INFO L423 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:50,490 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:50,490 INFO L82 PathProgramCache]: Analyzing trace with hash 2110879789, now seen corresponding path program 143 times [2018-09-30 20:43:50,490 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:50,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:50,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:50,490 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:50,490 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 20592 backedges. 0 proven. 20592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:51,518 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:51,518 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:51,526 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:43:51,716 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 144 check-sat command(s) [2018-09-30 20:43:51,717 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:51,721 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20592 backedges. 0 proven. 20592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:52,234 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:52,234 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [145, 145] total 145 [2018-09-30 20:43:52,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 146 states [2018-09-30 20:43:52,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2018-09-30 20:43:52,236 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:52,237 INFO L87 Difference]: Start difference. First operand 291 states and 291 transitions. Second operand 146 states. [2018-09-30 20:43:53,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:53,977 INFO L93 Difference]: Finished difference Result 295 states and 295 transitions. [2018-09-30 20:43:53,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2018-09-30 20:43:53,977 INFO L78 Accepts]: Start accepts. Automaton has 146 states. Word has length 290 [2018-09-30 20:43:53,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:53,978 INFO L225 Difference]: With dead ends: 295 [2018-09-30 20:43:53,978 INFO L226 Difference]: Without dead ends: 293 [2018-09-30 20:43:53,978 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:43:53,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-09-30 20:43:53,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2018-09-30 20:43:53,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-09-30 20:43:53,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2018-09-30 20:43:53,982 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 290 [2018-09-30 20:43:53,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:53,982 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2018-09-30 20:43:53,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has 146 states. [2018-09-30 20:43:53,982 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2018-09-30 20:43:53,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-09-30 20:43:53,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:53,983 INFO L375 BasicCegarLoop]: trace histogram [145, 144, 1, 1, 1] [2018-09-30 20:43:53,983 INFO L423 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:53,983 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:53,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1330965607, now seen corresponding path program 144 times [2018-09-30 20:43:53,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:53,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:53,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:53,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:53,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:55,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20880 backedges. 0 proven. 20880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:55,009 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:55,009 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:55,016 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 20:43:55,246 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 145 check-sat command(s) [2018-09-30 20:43:55,246 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:43:55,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:55,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20880 backedges. 0 proven. 20880 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:55,857 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:55,857 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [146, 146] total 146 [2018-09-30 20:43:55,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 147 states [2018-09-30 20:43:55,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2018-09-30 20:43:55,859 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:55,860 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand 147 states. [2018-09-30 20:43:57,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:43:57,785 INFO L93 Difference]: Finished difference Result 297 states and 297 transitions. [2018-09-30 20:43:57,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2018-09-30 20:43:57,786 INFO L78 Accepts]: Start accepts. Automaton has 147 states. Word has length 292 [2018-09-30 20:43:57,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:43:57,786 INFO L225 Difference]: With dead ends: 297 [2018-09-30 20:43:57,786 INFO L226 Difference]: Without dead ends: 295 [2018-09-30 20:43:57,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time [2018-09-30 20:43:57,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2018-09-30 20:43:57,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2018-09-30 20:43:57,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2018-09-30 20:43:57,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 295 transitions. [2018-09-30 20:43:57,790 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 295 transitions. Word has length 292 [2018-09-30 20:43:57,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:43:57,790 INFO L480 AbstractCegarLoop]: Abstraction has 295 states and 295 transitions. [2018-09-30 20:43:57,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 147 states. [2018-09-30 20:43:57,790 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 295 transitions. [2018-09-30 20:43:57,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2018-09-30 20:43:57,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:43:57,791 INFO L375 BasicCegarLoop]: trace histogram [146, 145, 1, 1, 1] [2018-09-30 20:43:57,791 INFO L423 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:43:57,791 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:43:57,792 INFO L82 PathProgramCache]: Analyzing trace with hash -842253791, now seen corresponding path program 145 times [2018-09-30 20:43:57,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:43:57,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:43:57,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:57,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:43:57,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:43:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:58,850 INFO L134 CoverageAnalysis]: Checked inductivity of 21170 backedges. 0 proven. 21170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:58,850 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:43:58,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:43:58,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:43:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:43:58,930 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:43:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 21170 backedges. 0 proven. 21170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:43:59,458 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:43:59,458 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [147, 147] total 147 [2018-09-30 20:43:59,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 148 states [2018-09-30 20:43:59,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2018-09-30 20:43:59,460 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:43:59,460 INFO L87 Difference]: Start difference. First operand 295 states and 295 transitions. Second operand 148 states. [2018-09-30 20:44:01,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:01,278 INFO L93 Difference]: Finished difference Result 299 states and 299 transitions. [2018-09-30 20:44:01,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2018-09-30 20:44:01,279 INFO L78 Accepts]: Start accepts. Automaton has 148 states. Word has length 294 [2018-09-30 20:44:01,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:01,279 INFO L225 Difference]: With dead ends: 299 [2018-09-30 20:44:01,280 INFO L226 Difference]: Without dead ends: 297 [2018-09-30 20:44:01,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:44:01,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2018-09-30 20:44:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2018-09-30 20:44:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2018-09-30 20:44:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 297 transitions. [2018-09-30 20:44:01,283 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 297 transitions. Word has length 294 [2018-09-30 20:44:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:01,284 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 297 transitions. [2018-09-30 20:44:01,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 148 states. [2018-09-30 20:44:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 297 transitions. [2018-09-30 20:44:01,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2018-09-30 20:44:01,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:01,285 INFO L375 BasicCegarLoop]: trace histogram [147, 146, 1, 1, 1] [2018-09-30 20:44:01,285 INFO L423 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:01,285 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:01,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1951989413, now seen corresponding path program 146 times [2018-09-30 20:44:01,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:01,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:01,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:01,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 20:44:01,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 21462 backedges. 0 proven. 21462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:02,321 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:02,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:44:02,328 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 20:44:02,398 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 20:44:02,398 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:02,402 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:02,902 INFO L134 CoverageAnalysis]: Checked inductivity of 21462 backedges. 0 proven. 21462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:02,921 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:02,922 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [148, 148] total 148 [2018-09-30 20:44:02,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 149 states [2018-09-30 20:44:02,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2018-09-30 20:44:02,923 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:02,924 INFO L87 Difference]: Start difference. First operand 297 states and 297 transitions. Second operand 149 states. [2018-09-30 20:44:04,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:04,152 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2018-09-30 20:44:04,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-09-30 20:44:04,152 INFO L78 Accepts]: Start accepts. Automaton has 149 states. Word has length 296 [2018-09-30 20:44:04,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:04,153 INFO L225 Difference]: With dead ends: 301 [2018-09-30 20:44:04,153 INFO L226 Difference]: Without dead ends: 299 [2018-09-30 20:44:04,153 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:44:04,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2018-09-30 20:44:04,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2018-09-30 20:44:04,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-09-30 20:44:04,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2018-09-30 20:44:04,158 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 296 [2018-09-30 20:44:04,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:04,158 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2018-09-30 20:44:04,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 149 states. [2018-09-30 20:44:04,159 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2018-09-30 20:44:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2018-09-30 20:44:04,160 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:04,160 INFO L375 BasicCegarLoop]: trace histogram [148, 147, 1, 1, 1] [2018-09-30 20:44:04,160 INFO L423 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:04,160 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:04,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1038934549, now seen corresponding path program 147 times [2018-09-30 20:44:04,160 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:04,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:04,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:04,161 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:04,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 21756 backedges. 0 proven. 21756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:05,266 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:05,266 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:44:05,272 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 20:44:05,541 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 148 check-sat command(s) [2018-09-30 20:44:05,541 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:05,547 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:06,209 INFO L134 CoverageAnalysis]: Checked inductivity of 21756 backedges. 0 proven. 21756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:06,229 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:06,229 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [149, 149] total 149 [2018-09-30 20:44:06,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 150 states [2018-09-30 20:44:06,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2018-09-30 20:44:06,231 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:06,231 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand 150 states. [2018-09-30 20:44:07,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:07,944 INFO L93 Difference]: Finished difference Result 303 states and 303 transitions. [2018-09-30 20:44:07,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2018-09-30 20:44:07,944 INFO L78 Accepts]: Start accepts. Automaton has 150 states. Word has length 298 [2018-09-30 20:44:07,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:07,945 INFO L225 Difference]: With dead ends: 303 [2018-09-30 20:44:07,945 INFO L226 Difference]: Without dead ends: 301 [2018-09-30 20:44:07,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time [2018-09-30 20:44:07,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2018-09-30 20:44:07,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2018-09-30 20:44:07,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2018-09-30 20:44:07,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 301 transitions. [2018-09-30 20:44:07,948 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 301 transitions. Word has length 298 [2018-09-30 20:44:07,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:07,949 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 301 transitions. [2018-09-30 20:44:07,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 150 states. [2018-09-30 20:44:07,949 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 301 transitions. [2018-09-30 20:44:07,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2018-09-30 20:44:07,949 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:07,950 INFO L375 BasicCegarLoop]: trace histogram [149, 148, 1, 1, 1] [2018-09-30 20:44:07,950 INFO L423 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:07,950 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:07,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1983741007, now seen corresponding path program 148 times [2018-09-30 20:44:07,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:07,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:07,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:07,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:07,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 22052 backedges. 0 proven. 22052 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:08,959 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:08,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:44:08,966 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 20:44:09,034 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 20:44:09,034 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:09,038 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 22052 backedges. 0 proven. 22052 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:09,607 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:09,607 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [150, 150] total 150 [2018-09-30 20:44:09,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 151 states [2018-09-30 20:44:09,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2018-09-30 20:44:09,609 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:09,609 INFO L87 Difference]: Start difference. First operand 301 states and 301 transitions. Second operand 151 states. [2018-09-30 20:44:10,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 20:44:10,714 INFO L93 Difference]: Finished difference Result 305 states and 305 transitions. [2018-09-30 20:44:10,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2018-09-30 20:44:10,714 INFO L78 Accepts]: Start accepts. Automaton has 151 states. Word has length 300 [2018-09-30 20:44:10,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 20:44:10,715 INFO L225 Difference]: With dead ends: 305 [2018-09-30 20:44:10,715 INFO L226 Difference]: Without dead ends: 303 [2018-09-30 20:44:10,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 300 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time [2018-09-30 20:44:10,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-09-30 20:44:10,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2018-09-30 20:44:10,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-09-30 20:44:10,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 303 transitions. [2018-09-30 20:44:10,718 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 303 transitions. Word has length 300 [2018-09-30 20:44:10,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 20:44:10,718 INFO L480 AbstractCegarLoop]: Abstraction has 303 states and 303 transitions. [2018-09-30 20:44:10,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has 151 states. [2018-09-30 20:44:10,718 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 303 transitions. [2018-09-30 20:44:10,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-09-30 20:44:10,720 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 20:44:10,720 INFO L375 BasicCegarLoop]: trace histogram [150, 149, 1, 1, 1] [2018-09-30 20:44:10,720 INFO L423 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 20:44:10,720 INFO L99 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-09-30 20:44:10,720 INFO L82 PathProgramCache]: Analyzing trace with hash -590319607, now seen corresponding path program 149 times [2018-09-30 20:44:10,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 20:44:10,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 20:44:10,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:10,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 20:44:10,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 20:44:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 20:44:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 22350 backedges. 0 proven. 22350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:11,738 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 20:44:11,738 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 20:44:11,746 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 20:44:11,948 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 150 check-sat command(s) [2018-09-30 20:44:11,948 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 20:44:11,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 20:44:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 22350 backedges. 0 proven. 22350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 20:44:12,493 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 20:44:12,494 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [151, 151] total 151 [2018-09-30 20:44:12,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 152 states [2018-09-30 20:44:12,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2018-09-30 20:44:12,496 INFO L146 InterpolantAutomaton]: No coverage relation statistics for PredicateCoverageChecker [2018-09-30 20:44:12,496 INFO L87 Difference]: Start difference. First operand 303 states and 303 transitions. Second operand 152 states. Received shutdown request... [2018-09-30 20:44:12,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-30 20:44:12,956 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-30 20:44:12,960 WARN L206 ceAbstractionStarter]: Timeout [2018-09-30 20:44:12,961 INFO L202 PluginConnector]: Adding new model count_by_2.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.09 08:44:12 BoogieIcfgContainer [2018-09-30 20:44:12,961 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-30 20:44:12,962 INFO L168 Benchmark]: Toolchain (without parser) took 242734.05 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 717.8 MB). Free memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: -616.0 MB). Peak memory consumption was 101.7 MB. Max. memory is 7.1 GB. [2018-09-30 20:44:12,963 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:44:12,964 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.83 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:44:12,964 INFO L168 Benchmark]: Boogie Preprocessor took 23.14 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-30 20:44:12,964 INFO L168 Benchmark]: RCFGBuilder took 329.67 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-30 20:44:12,965 INFO L168 Benchmark]: TraceAbstraction took 242335.23 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 717.8 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -637.2 MB). Peak memory consumption was 80.6 MB. Max. memory is 7.1 GB. [2018-09-30 20:44:12,967 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 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 39.83 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.14 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 329.67 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 242335.23 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 717.8 MB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -637.2 MB). Peak memory consumption was 80.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 31]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 31). Cancelled while BasicCegarLoop was constructing difference of abstraction (303states) and FLOYD_HOARE automaton (currently 89 states, 152 states before enhancement), while ReachableStatesComputation was computing reachable states (173 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 242.2s OverallTime, 150 OverallIterations, 150 TraceHistogramMax, 92.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 598 SDtfs, 0 SDslu, 16465 SDs, 0 SdLazy, 16616 SolverSat, 291 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34272 GetRequests, 22947 SyntacticMatches, 0 SemanticMatches, 11325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 115.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=303occurred in iteration=149, 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: 0.5s AutomataMinimizationTime, 149 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 14.2s SatisfiabilityAnalysisTime, 126.2s InterpolantComputationTime, 45896 NumberOfCodeBlocks, 45896 NumberOfCodeBlocksAsserted, 5949 NumberOfCheckSat, 45597 ConstructedInterpolants, 0 QuantifiedInterpolants, 27452079 SizeOfPredicates, 149 NumberOfNonLiveVariables, 46637 ConjunctsInSsa, 11473 ConjunctsInUnsatCore, 299 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2249900 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/count_by_2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-30_20-44-12-977.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/count_by_2.i_3.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-30_20-44-12-977.csv Completed graceful shutdown