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/20170319-ConjunctivePathPrograms/functions1.i_3.bplTransformedIcfg_BEv2_8.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:42:45,260 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:42:45,267 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:42:45,283 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:42:45,284 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:42:45,285 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:42:45,287 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:42:45,290 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:42:45,293 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:42:45,299 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:42:45,300 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 12:42:45,300 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 12:42:45,301 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 12:42:45,303 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 12:42:45,304 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 12:42:45,305 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 12:42:45,306 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 12:42:45,308 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 12:42:45,309 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 12:42:45,315 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 12:42:45,316 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 12:42:45,318 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 12:42:45,323 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-04 12:42:45,335 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 12:42:45,358 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:42:45,358 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:42:45,359 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:42:45,359 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:42:45,360 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:42:45,360 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:42:45,361 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:42:45,361 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:42:45,361 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:42:45,361 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:42:45,361 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:42:45,362 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:42:45,362 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:42:45,362 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:42:45,362 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:42:45,362 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:42:45,363 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:42:45,364 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:42:45,364 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:42:45,364 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:42:45,364 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:42:45,365 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:42:45,365 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:42:45,365 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:42:45,365 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:42:45,366 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:42:45,366 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:42:45,366 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:42:45,366 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:42:45,366 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:42:45,366 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 12:42:45,429 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:42:45,441 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:42:45,445 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:42:45,447 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:42:45,447 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:42:45,448 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/functions1.i_3.bplTransformedIcfg_BEv2_8.bpl [2018-10-04 12:42:45,448 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/functions1.i_3.bplTransformedIcfg_BEv2_8.bpl' [2018-10-04 12:42:45,498 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:42:45,500 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:42:45,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:42:45,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:42:45,501 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:42:45,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:42:45" (1/1) ... [2018-10-04 12:42:45,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:42:45" (1/1) ... [2018-10-04 12:42:45,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:42:45,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:42:45,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:42:45,541 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:42:45,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:42:45" (1/1) ... [2018-10-04 12:42:45,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:42:45" (1/1) ... [2018-10-04 12:42:45,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:42:45" (1/1) ... [2018-10-04 12:42:45,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:42:45" (1/1) ... [2018-10-04 12:42:45,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:42:45" (1/1) ... [2018-10-04 12:42:45,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:42:45" (1/1) ... [2018-10-04 12:42:45,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:42:45" (1/1) ... [2018-10-04 12:42:45,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:42:45,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:42:45,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:42:45,563 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:42:45,564 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:42:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:42:45,643 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-04 12:42:45,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 12:42:45,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 12:42:45,808 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 12:42:45,809 INFO L202 PluginConnector]: Adding new model functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:42:45 BoogieIcfgContainer [2018-10-04 12:42:45,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:42:45,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:42:45,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:42:45,813 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:42:45,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:42:45" (1/2) ... [2018-10-04 12:42:45,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6460f1f5 and model type functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:42:45, skipping insertion in model container [2018-10-04 12:42:45,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:42:45" (2/2) ... [2018-10-04 12:42:45,816 INFO L112 eAbstractionObserver]: Analyzing ICFG functions1.i_3.bplTransformedIcfg_BEv2_8.bpl [2018-10-04 12:42:45,826 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:42:45,833 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:42:45,878 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:42:45,879 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:42:45,879 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:42:45,879 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:42:45,879 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:42:45,879 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:42:45,880 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:42:45,880 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:42:45,880 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:42:45,895 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-04 12:42:45,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-10-04 12:42:45,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:45,902 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-10-04 12:42:45,904 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:45,910 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:45,911 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-10-04 12:42:45,913 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:45,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:45,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:45,961 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:42:45,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:46,068 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:42:46,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 12:42:46,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:42:46,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:42:46,089 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:42:46,092 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 3 states. [2018-10-04 12:42:46,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:42:46,124 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2018-10-04 12:42:46,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:42:46,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-10-04 12:42:46,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:42:46,137 INFO L225 Difference]: With dead ends: 9 [2018-10-04 12:42:46,138 INFO L226 Difference]: Without dead ends: 5 [2018-10-04 12:42:46,141 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 12:42:46,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2018-10-04 12:42:46,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2018-10-04 12:42:46,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-10-04 12:42:46,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2018-10-04 12:42:46,176 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2018-10-04 12:42:46,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:42:46,177 INFO L480 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2018-10-04 12:42:46,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:42:46,177 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2018-10-04 12:42:46,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 12:42:46,178 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:46,178 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 12:42:46,178 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:46,179 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:46,179 INFO L82 PathProgramCache]: Analyzing trace with hash 930412, now seen corresponding path program 1 times [2018-10-04 12:42:46,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:46,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:46,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:46,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:42:46,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:46,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:42:46,332 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:42:46,346 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:42:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:46,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:42:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:46,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:42:46,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-10-04 12:42:46,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:42:46,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:42:46,467 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:42:46,467 INFO L87 Difference]: Start difference. First operand 5 states and 5 transitions. Second operand 4 states. [2018-10-04 12:42:46,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:42:46,511 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2018-10-04 12:42:46,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:42:46,512 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2018-10-04 12:42:46,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:42:46,513 INFO L225 Difference]: With dead ends: 8 [2018-10-04 12:42:46,513 INFO L226 Difference]: Without dead ends: 6 [2018-10-04 12:42:46,514 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 2 [2018-10-04 12:42:46,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-04 12:42:46,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-04 12:42:46,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-04 12:42:46,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-04 12:42:46,516 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-04 12:42:46,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:42:46,517 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-04 12:42:46,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:42:46,517 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-04 12:42:46,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 12:42:46,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:46,518 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2018-10-04 12:42:46,518 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:46,518 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:46,518 INFO L82 PathProgramCache]: Analyzing trace with hash 28844579, now seen corresponding path program 2 times [2018-10-04 12:42:46,518 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:46,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:46,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:46,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:42:46,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:46,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:42:46,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:42:46,634 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:42:46,667 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:42:46,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:42:46,669 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:42:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:46,724 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:42:46,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-04 12:42:46,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:42:46,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:42:46,725 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:42:46,725 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-10-04 12:42:46,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:42:46,747 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 12:42:46,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:42:46,748 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-10-04 12:42:46,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:42:46,749 INFO L225 Difference]: With dead ends: 9 [2018-10-04 12:42:46,749 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 12:42:46,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 3 [2018-10-04 12:42:46,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 12:42:46,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 12:42:46,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 12:42:46,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 12:42:46,752 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-04 12:42:46,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:42:46,752 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 12:42:46,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:42:46,753 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 12:42:46,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:42:46,753 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:46,753 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1] [2018-10-04 12:42:46,754 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:46,754 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:46,754 INFO L82 PathProgramCache]: Analyzing trace with hash 894183756, now seen corresponding path program 3 times [2018-10-04 12:42:46,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:46,754 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:46,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:46,756 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:42:46,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:46,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:46,896 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:42:46,896 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:42:46,909 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:42:46,961 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 12:42:46,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:42:46,963 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:42:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:47,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:42:47,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-04 12:42:47,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:42:47,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:42:47,043 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:42:47,044 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-10-04 12:42:47,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:42:47,160 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-04 12:42:47,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:42:47,161 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-10-04 12:42:47,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:42:47,162 INFO L225 Difference]: With dead ends: 10 [2018-10-04 12:42:47,162 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 12:42:47,162 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 4 [2018-10-04 12:42:47,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 12:42:47,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 12:42:47,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 12:42:47,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-04 12:42:47,165 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-04 12:42:47,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:42:47,166 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-04 12:42:47,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:42:47,166 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-04 12:42:47,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 12:42:47,166 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:47,167 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1] [2018-10-04 12:42:47,167 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:47,167 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:47,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1949894467, now seen corresponding path program 4 times [2018-10-04 12:42:47,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:47,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:47,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:47,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:42:47,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:47,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:47,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:42:47,371 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:42:47,378 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:42:47,419 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:42:47,420 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:42:47,422 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:42:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:47,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:42:47,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 12:42:47,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:42:47,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:42:47,541 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:42:47,541 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-10-04 12:42:47,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:42:47,566 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 12:42:47,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:42:47,567 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-04 12:42:47,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:42:47,568 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:42:47,569 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 12:42:47,569 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 5 [2018-10-04 12:42:47,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 12:42:47,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 12:42:47,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 12:42:47,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 12:42:47,572 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-04 12:42:47,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:42:47,572 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 12:42:47,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:42:47,573 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 12:42:47,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:42:47,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:47,574 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1] [2018-10-04 12:42:47,574 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:47,574 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:47,574 INFO L82 PathProgramCache]: Analyzing trace with hash 317188140, now seen corresponding path program 5 times [2018-10-04 12:42:47,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:47,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:47,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:47,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:42:47,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:47,800 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:47,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:42:47,800 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:42:47,808 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:42:47,826 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 12:42:47,826 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:42:47,828 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:42:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:47,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:42:47,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-04 12:42:47,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:42:47,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:42:47,944 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:42:47,944 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-10-04 12:42:47,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:42:47,990 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-04 12:42:47,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:42:47,991 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-04 12:42:47,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:42:47,992 INFO L225 Difference]: With dead ends: 12 [2018-10-04 12:42:47,992 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 12:42:47,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 6 [2018-10-04 12:42:47,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 12:42:47,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 12:42:47,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 12:42:47,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-04 12:42:47,996 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-04 12:42:47,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:42:47,996 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-04 12:42:47,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:42:47,997 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-04 12:42:47,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 12:42:47,997 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:47,997 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1] [2018-10-04 12:42:47,998 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:47,998 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:47,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1242899555, now seen corresponding path program 6 times [2018-10-04 12:42:47,998 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:47,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:47,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:47,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:42:47,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:48,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:42:48,116 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:42:48,130 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:42:48,151 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 12:42:48,151 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:42:48,154 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:42:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:48,322 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:42:48,322 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-04 12:42:48,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:42:48,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:42:48,323 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:42:48,323 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-10-04 12:42:48,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:42:48,500 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 12:42:48,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:42:48,501 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-10-04 12:42:48,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:42:48,502 INFO L225 Difference]: With dead ends: 13 [2018-10-04 12:42:48,502 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:42:48,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 7 [2018-10-04 12:42:48,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:42:48,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 12:42:48,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:42:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 12:42:48,510 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-04 12:42:48,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:42:48,511 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 12:42:48,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:42:48,511 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 12:42:48,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:42:48,511 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:48,512 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1] [2018-10-04 12:42:48,512 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:48,513 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:48,513 INFO L82 PathProgramCache]: Analyzing trace with hash -124817652, now seen corresponding path program 7 times [2018-10-04 12:42:48,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:48,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:48,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:48,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:42:48,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:48,865 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:42:48,865 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:42:48,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:42:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:48,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:42:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:49,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:42:49,028 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 12:42:49,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:42:49,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:42:49,029 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:42:49,029 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-10-04 12:42:49,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:42:49,059 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-04 12:42:49,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:42:49,059 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-04 12:42:49,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:42:49,060 INFO L225 Difference]: With dead ends: 14 [2018-10-04 12:42:49,060 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 12:42:49,061 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 8 [2018-10-04 12:42:49,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 12:42:49,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 12:42:49,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 12:42:49,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-04 12:42:49,063 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-04 12:42:49,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:42:49,064 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-04 12:42:49,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:42:49,064 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-04 12:42:49,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 12:42:49,064 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:49,065 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1] [2018-10-04 12:42:49,065 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:49,065 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:49,065 INFO L82 PathProgramCache]: Analyzing trace with hash 425621891, now seen corresponding path program 8 times [2018-10-04 12:42:49,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:49,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:49,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:49,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:42:49,067 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:49,236 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:42:49,237 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:42:49,245 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:42:49,275 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:42:49,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:42:49,278 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:42:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:49,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:42:49,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-04 12:42:49,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:42:49,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:42:49,395 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:42:49,395 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-10-04 12:42:49,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:42:49,447 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 12:42:49,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:42:49,449 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-10-04 12:42:49,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:42:49,450 INFO L225 Difference]: With dead ends: 15 [2018-10-04 12:42:49,450 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:42:49,450 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 9 [2018-10-04 12:42:49,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:42:49,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 12:42:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:42:49,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 12:42:49,453 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-04 12:42:49,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:42:49,453 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 12:42:49,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:42:49,454 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 12:42:49,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 12:42:49,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:49,454 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1] [2018-10-04 12:42:49,455 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:49,455 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:49,455 INFO L82 PathProgramCache]: Analyzing trace with hash 309378540, now seen corresponding path program 9 times [2018-10-04 12:42:49,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:49,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:49,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:49,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:42:49,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:49,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:42:49,666 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:42:49,675 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:42:49,710 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 12:42:49,710 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:42:49,713 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:42:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:49,836 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:42:49,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-04 12:42:49,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:42:49,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:42:49,837 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:42:49,837 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-10-04 12:42:49,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:42:49,929 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-04 12:42:49,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:42:49,929 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-10-04 12:42:49,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:42:49,930 INFO L225 Difference]: With dead ends: 16 [2018-10-04 12:42:49,930 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 12:42:49,931 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 10 [2018-10-04 12:42:49,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 12:42:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 12:42:49,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 12:42:49,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-04 12:42:49,933 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-04 12:42:49,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:42:49,934 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-04 12:42:49,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:42:49,934 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-04 12:42:49,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 12:42:49,935 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:49,935 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1] [2018-10-04 12:42:49,935 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:49,935 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:49,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1000801955, now seen corresponding path program 10 times [2018-10-04 12:42:49,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:49,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:49,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:49,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:42:49,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:50,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:42:50,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:42:50,152 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:42:50,173 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:42:50,174 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:42:50,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:42:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:50,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:42:50,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-04 12:42:50,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:42:50,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:42:50,454 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:42:50,454 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-10-04 12:42:50,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:42:50,506 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 12:42:50,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:42:50,507 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-10-04 12:42:50,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:42:50,507 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:42:50,507 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 12:42:50,508 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 11 [2018-10-04 12:42:50,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 12:42:50,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 12:42:50,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 12:42:50,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 12:42:50,511 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-04 12:42:50,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:42:50,512 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 12:42:50,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:42:50,512 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 12:42:50,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:42:50,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:50,512 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1] [2018-10-04 12:42:50,513 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:50,513 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:50,513 INFO L82 PathProgramCache]: Analyzing trace with hash 960091340, now seen corresponding path program 11 times [2018-10-04 12:42:50,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:50,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:50,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:50,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:42:50,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:50,765 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:50,765 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:42:50,765 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:42:50,773 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:42:50,799 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 12:42:50,800 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:42:50,803 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:42:50,994 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:51,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:42:51,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-04 12:42:51,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:42:51,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:42:51,026 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:42:51,026 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-10-04 12:42:51,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:42:51,168 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-04 12:42:51,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:42:51,169 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-04 12:42:51,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:42:51,170 INFO L225 Difference]: With dead ends: 18 [2018-10-04 12:42:51,170 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 12:42:51,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 12 [2018-10-04 12:42:51,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 12:42:51,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 12:42:51,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 12:42:51,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-04 12:42:51,175 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-04 12:42:51,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:42:51,175 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-04 12:42:51,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:42:51,175 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-04 12:42:51,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 12:42:51,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:51,176 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1] [2018-10-04 12:42:51,176 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:51,176 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:51,177 INFO L82 PathProgramCache]: Analyzing trace with hash -301937725, now seen corresponding path program 12 times [2018-10-04 12:42:51,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:51,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:51,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:51,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:42:51,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:51,374 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:42:51,374 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:42:51,382 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:42:51,411 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 12:42:51,411 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:42:51,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:42:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:51,512 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:42:51,513 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 12:42:51,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:42:51,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:42:51,513 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:42:51,513 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-10-04 12:42:51,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:42:51,576 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 12:42:51,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:42:51,577 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-10-04 12:42:51,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:42:51,577 INFO L225 Difference]: With dead ends: 19 [2018-10-04 12:42:51,578 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 12:42:51,578 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 13 [2018-10-04 12:42:51,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 12:42:51,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 12:42:51,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 12:42:51,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 12:42:51,582 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-04 12:42:51,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:42:51,583 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 12:42:51,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:42:51,583 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 12:42:51,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 12:42:51,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:51,584 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1] [2018-10-04 12:42:51,584 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:51,584 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:51,584 INFO L82 PathProgramCache]: Analyzing trace with hash -770133076, now seen corresponding path program 13 times [2018-10-04 12:42:51,584 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:51,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:51,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:51,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:42:51,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:52,072 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:42:52,072 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:42:52,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:42:52,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:52,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:42:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:52,202 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:42:52,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 12:42:52,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:42:52,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:42:52,203 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:42:52,204 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-10-04 12:42:52,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:42:52,417 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-04 12:42:52,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:42:52,417 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-10-04 12:42:52,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:42:52,418 INFO L225 Difference]: With dead ends: 20 [2018-10-04 12:42:52,418 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 12:42:52,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 14 [2018-10-04 12:42:52,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 12:42:52,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 12:42:52,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 12:42:52,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-04 12:42:52,422 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-04 12:42:52,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:42:52,422 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-04 12:42:52,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:42:52,422 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-04 12:42:52,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 12:42:52,423 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:52,423 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1] [2018-10-04 12:42:52,423 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:52,423 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:52,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1895680227, now seen corresponding path program 14 times [2018-10-04 12:42:52,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:52,424 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:52,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:52,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:42:52,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:52,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:42:52,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:42:52,957 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:42:52,980 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:42:52,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:42:52,983 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:42:53,099 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:53,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:42:53,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-04 12:42:53,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:42:53,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:42:53,120 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:42:53,120 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-04 12:42:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:42:53,158 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 12:42:53,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:42:53,159 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-04 12:42:53,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:42:53,160 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:42:53,160 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:42:53,160 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 15 [2018-10-04 12:42:53,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:42:53,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 12:42:53,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:42:53,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 12:42:53,164 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-04 12:42:53,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:42:53,164 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 12:42:53,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:42:53,164 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 12:42:53,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:42:53,165 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:53,165 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1] [2018-10-04 12:42:53,165 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:53,166 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:53,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1363453300, now seen corresponding path program 15 times [2018-10-04 12:42:53,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:53,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:53,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:53,167 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:42:53,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:53,465 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:42:53,465 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:42:53,473 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:42:53,515 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 12:42:53,515 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:42:53,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:42:53,877 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:53,910 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:42:53,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-04 12:42:53,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:42:53,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:42:53,911 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:42:53,911 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-04 12:42:53,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:42:53,962 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-04 12:42:53,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:42:53,963 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-04 12:42:53,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:42:53,964 INFO L225 Difference]: With dead ends: 22 [2018-10-04 12:42:53,964 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 12:42:53,965 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.2s impTime 16 [2018-10-04 12:42:53,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 12:42:53,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 12:42:53,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 12:42:53,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-04 12:42:53,969 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-04 12:42:53,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:42:53,970 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-04 12:42:53,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:42:53,970 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-04 12:42:53,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 12:42:53,970 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:53,970 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1] [2018-10-04 12:42:53,971 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:53,971 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:53,971 INFO L82 PathProgramCache]: Analyzing trace with hash 682622467, now seen corresponding path program 16 times [2018-10-04 12:42:53,971 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:53,971 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:53,972 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:53,972 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:42:53,973 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:54,361 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:54,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:42:54,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:42:54,370 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:42:54,406 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:42:54,406 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:42:54,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:42:54,528 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:54,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:42:54,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-04 12:42:54,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:42:54,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:42:54,550 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:42:54,550 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-10-04 12:42:54,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:42:54,643 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 12:42:54,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:42:54,644 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-10-04 12:42:54,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:42:54,644 INFO L225 Difference]: With dead ends: 23 [2018-10-04 12:42:54,644 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 12:42:54,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 17 [2018-10-04 12:42:54,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 12:42:54,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 12:42:54,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 12:42:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 12:42:54,648 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-04 12:42:54,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:42:54,648 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 12:42:54,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:42:54,648 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 12:42:54,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:42:54,648 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:54,648 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1] [2018-10-04 12:42:54,649 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:54,649 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:54,649 INFO L82 PathProgramCache]: Analyzing trace with hash -313538196, now seen corresponding path program 17 times [2018-10-04 12:42:54,649 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:54,649 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:54,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:54,650 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:42:54,650 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:55,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:42:55,168 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:42:55,176 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:42:55,209 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 12:42:55,209 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:42:55,213 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:42:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:55,318 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:42:55,318 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-04 12:42:55,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:42:55,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:42:55,319 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:42:55,319 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-10-04 12:42:55,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:42:55,384 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-04 12:42:55,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:42:55,384 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-10-04 12:42:55,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:42:55,385 INFO L225 Difference]: With dead ends: 24 [2018-10-04 12:42:55,385 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 12:42:55,386 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 18 [2018-10-04 12:42:55,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 12:42:55,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 12:42:55,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 12:42:55,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-04 12:42:55,390 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-04 12:42:55,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:42:55,391 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-04 12:42:55,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:42:55,391 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-04 12:42:55,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 12:42:55,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:55,392 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1] [2018-10-04 12:42:55,392 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:55,392 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:55,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1129747677, now seen corresponding path program 18 times [2018-10-04 12:42:55,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:55,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:55,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:55,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:42:55,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:55,926 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:42:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:55,928 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:42:55,928 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:42:55,938 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:42:55,991 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 12:42:55,991 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:42:55,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:42:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:56,297 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:42:56,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-04 12:42:56,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:42:56,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:42:56,298 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:42:56,298 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-10-04 12:42:56,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:42:56,653 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 12:42:56,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:42:56,653 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-10-04 12:42:56,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:42:56,654 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:42:56,654 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:42:56,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.3s impTime 6 [2018-10-04 12:42:56,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:42:56,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 12:42:56,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 12:42:56,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 12:42:56,659 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-04 12:42:56,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:42:56,659 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 12:42:56,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:42:56,660 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 12:42:56,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:42:56,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:56,660 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1] [2018-10-04 12:42:56,661 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:56,661 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:56,661 INFO L82 PathProgramCache]: Analyzing trace with hash -662437812, now seen corresponding path program 19 times [2018-10-04 12:42:56,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:56,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:56,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:56,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:42:56,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:57,071 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:42:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:57,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:42:57,092 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:42:57,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:42:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:57,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:42:57,283 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:57,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:42:57,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-04 12:42:57,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:42:57,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:42:57,315 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:42:57,315 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-10-04 12:42:57,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:42:57,363 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-04 12:42:57,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:42:57,364 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-04 12:42:57,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:42:57,365 INFO L225 Difference]: With dead ends: 26 [2018-10-04 12:42:57,365 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 12:42:57,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 7 [2018-10-04 12:42:57,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 12:42:57,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 12:42:57,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 12:42:57,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-04 12:42:57,368 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-04 12:42:57,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:42:57,368 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-04 12:42:57,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:42:57,369 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-04 12:42:57,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 12:42:57,369 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:57,369 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1] [2018-10-04 12:42:57,370 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:57,370 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:57,370 INFO L82 PathProgramCache]: Analyzing trace with hash 939266115, now seen corresponding path program 20 times [2018-10-04 12:42:57,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:57,370 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:57,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:57,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:42:57,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:57,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:58,118 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:42:58,150 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:58,151 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:42:58,151 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:42:58,159 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:42:58,186 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:42:58,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:42:58,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:42:58,256 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:58,278 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:42:58,278 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-04 12:42:58,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:42:58,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:42:58,279 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:42:58,279 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-10-04 12:42:58,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:42:58,319 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 12:42:58,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:42:58,319 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-10-04 12:42:58,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:42:58,320 INFO L225 Difference]: With dead ends: 27 [2018-10-04 12:42:58,320 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 12:42:58,320 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 8 [2018-10-04 12:42:58,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 12:42:58,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 12:42:58,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 12:42:58,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 12:42:58,323 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-04 12:42:58,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:42:58,324 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 12:42:58,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:42:58,324 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 12:42:58,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 12:42:58,325 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:58,325 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1] [2018-10-04 12:42:58,325 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:58,325 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:58,325 INFO L82 PathProgramCache]: Analyzing trace with hash -947519700, now seen corresponding path program 21 times [2018-10-04 12:42:58,326 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:58,326 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:58,326 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:58,327 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:42:58,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:58,667 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:42:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:58,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:42:58,731 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:42:58,740 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:42:58,778 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 12:42:58,778 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:42:58,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:42:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:58,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:42:58,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-04 12:42:58,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:42:58,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:42:58,921 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:42:58,921 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-10-04 12:42:58,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:42:58,976 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-04 12:42:58,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:42:58,980 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-10-04 12:42:58,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:42:58,981 INFO L225 Difference]: With dead ends: 28 [2018-10-04 12:42:58,981 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 12:42:58,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 9 [2018-10-04 12:42:58,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 12:42:58,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 12:42:58,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 12:42:58,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-04 12:42:58,984 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-04 12:42:58,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:42:58,984 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-04 12:42:58,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:42:58,985 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-04 12:42:58,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 12:42:58,985 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:42:58,985 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1] [2018-10-04 12:42:58,986 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:42:58,986 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:42:58,986 INFO L82 PathProgramCache]: Analyzing trace with hash 691662179, now seen corresponding path program 22 times [2018-10-04 12:42:58,986 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:42:58,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:42:58,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:58,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:42:58,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:42:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:42:59,908 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:42:59,953 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:42:59,954 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:42:59,954 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:42:59,962 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:42:59,999 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:42:59,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:00,001 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:00,139 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:00,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-04 12:43:00,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:43:00,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:43:00,140 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:00,141 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-10-04 12:43:00,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:00,197 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 12:43:00,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:43:00,204 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-10-04 12:43:00,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:00,204 INFO L225 Difference]: With dead ends: 29 [2018-10-04 12:43:00,205 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 12:43:00,205 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 10 [2018-10-04 12:43:00,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 12:43:00,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 12:43:00,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 12:43:00,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 12:43:00,208 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-04 12:43:00,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:00,208 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 12:43:00,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:43:00,208 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 12:43:00,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:43:00,209 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:00,209 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1] [2018-10-04 12:43:00,209 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:00,209 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:00,210 INFO L82 PathProgramCache]: Analyzing trace with hash -33307124, now seen corresponding path program 23 times [2018-10-04 12:43:00,210 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:00,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:00,210 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:00,211 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:00,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:00,612 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:00,689 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:00,689 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:00,696 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:43:00,742 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 12:43:00,742 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:00,745 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:01,412 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:01,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:01,433 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-04 12:43:01,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:43:01,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:43:01,433 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:01,433 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-10-04 12:43:01,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:01,467 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-04 12:43:01,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:43:01,470 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-04 12:43:01,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:01,470 INFO L225 Difference]: With dead ends: 30 [2018-10-04 12:43:01,471 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 12:43:01,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.2s impTime 11 [2018-10-04 12:43:01,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 12:43:01,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 12:43:01,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 12:43:01,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-04 12:43:01,474 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-04 12:43:01,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:01,474 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-04 12:43:01,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:43:01,474 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-04 12:43:01,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 12:43:01,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:01,475 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1] [2018-10-04 12:43:01,475 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:01,476 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:01,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1032519037, now seen corresponding path program 24 times [2018-10-04 12:43:01,476 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:01,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:01,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:01,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:01,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:01,752 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:01,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:01,836 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:01,844 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:43:01,890 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 12:43:01,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:01,893 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:02,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:02,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-04 12:43:02,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:43:02,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:43:02,030 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:02,030 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-10-04 12:43:02,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:02,127 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 12:43:02,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:43:02,127 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-10-04 12:43:02,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:02,128 INFO L225 Difference]: With dead ends: 31 [2018-10-04 12:43:02,128 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 12:43:02,129 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 12 [2018-10-04 12:43:02,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 12:43:02,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 12:43:02,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 12:43:02,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 12:43:02,136 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-04 12:43:02,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:02,136 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 12:43:02,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:43:02,137 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 12:43:02,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 12:43:02,137 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:02,137 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1] [2018-10-04 12:43:02,138 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:02,138 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:02,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1943317268, now seen corresponding path program 25 times [2018-10-04 12:43:02,138 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:02,138 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:02,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:02,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:02,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:02,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:02,458 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:02,621 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:02,621 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:02,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:43:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:02,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:02,824 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:02,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:02,845 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-04 12:43:02,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:43:02,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:43:02,846 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:02,846 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-10-04 12:43:02,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:02,895 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-04 12:43:02,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:43:02,896 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-10-04 12:43:02,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:02,896 INFO L225 Difference]: With dead ends: 32 [2018-10-04 12:43:02,896 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 12:43:02,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 13 [2018-10-04 12:43:02,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 12:43:02,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 12:43:02,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 12:43:02,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-04 12:43:02,900 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-04 12:43:02,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:02,901 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-04 12:43:02,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:43:02,901 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-04 12:43:02,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 12:43:02,902 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:02,902 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1] [2018-10-04 12:43:02,902 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:02,902 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:02,903 INFO L82 PathProgramCache]: Analyzing trace with hash -113291357, now seen corresponding path program 26 times [2018-10-04 12:43:02,903 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:02,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:02,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:02,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:43:02,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:03,184 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:03,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:03,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:03,352 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:43:03,403 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:43:03,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:03,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:03,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:03,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-04 12:43:03,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:43:03,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:43:03,577 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:03,577 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-10-04 12:43:03,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:03,669 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 12:43:03,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:43:03,670 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-10-04 12:43:03,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:03,670 INFO L225 Difference]: With dead ends: 33 [2018-10-04 12:43:03,671 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 12:43:03,671 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.2s impTime 14 [2018-10-04 12:43:03,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 12:43:03,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 12:43:03,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:43:03,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 12:43:03,674 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-04 12:43:03,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:03,674 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 12:43:03,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:43:03,674 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 12:43:03,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:43:03,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:03,675 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1] [2018-10-04 12:43:03,675 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:03,675 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:03,675 INFO L82 PathProgramCache]: Analyzing trace with hash 782937036, now seen corresponding path program 27 times [2018-10-04 12:43:03,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:03,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:03,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:03,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:03,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:04,297 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:04,483 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:04,483 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:04,491 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:43:04,558 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 12:43:04,559 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:04,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:04,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:04,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-04 12:43:04,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:43:04,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:43:04,693 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:04,693 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-10-04 12:43:04,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:04,739 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-04 12:43:04,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:43:04,740 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-04 12:43:04,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:04,740 INFO L225 Difference]: With dead ends: 34 [2018-10-04 12:43:04,741 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 12:43:04,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 15 [2018-10-04 12:43:04,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 12:43:04,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 12:43:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 12:43:04,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-04 12:43:04,745 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-04 12:43:04,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:04,746 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-04 12:43:04,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:43:04,746 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-04 12:43:04,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 12:43:04,746 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:04,747 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1] [2018-10-04 12:43:04,747 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:04,747 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:04,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1498753853, now seen corresponding path program 28 times [2018-10-04 12:43:04,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:04,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:04,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:04,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:04,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:05,452 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:05,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:05,528 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:05,542 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:43:05,580 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:43:05,580 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:05,583 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:05,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:05,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-04 12:43:05,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:43:05,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:43:05,734 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:05,734 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-10-04 12:43:05,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:05,809 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 12:43:05,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:43:05,810 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-10-04 12:43:05,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:05,811 INFO L225 Difference]: With dead ends: 35 [2018-10-04 12:43:05,811 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 12:43:05,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 16 [2018-10-04 12:43:05,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 12:43:05,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 12:43:05,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 12:43:05,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 12:43:05,816 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-04 12:43:05,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:05,816 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 12:43:05,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:43:05,816 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 12:43:05,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 12:43:05,817 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:05,817 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1] [2018-10-04 12:43:05,817 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:05,817 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:05,817 INFO L82 PathProgramCache]: Analyzing trace with hash 783272620, now seen corresponding path program 29 times [2018-10-04 12:43:05,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:05,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:05,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:05,818 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:05,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:06,271 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:06,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:06,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:06,538 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:43:06,602 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 12:43:06,602 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:06,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:06,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:06,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-04 12:43:06,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:43:06,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:43:06,736 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:06,736 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-10-04 12:43:06,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:06,778 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-04 12:43:06,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:43:06,778 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-10-04 12:43:06,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:06,779 INFO L225 Difference]: With dead ends: 36 [2018-10-04 12:43:06,779 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 12:43:06,779 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 17 [2018-10-04 12:43:06,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 12:43:06,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 12:43:06,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 12:43:06,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-04 12:43:06,782 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-04 12:43:06,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:06,782 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-04 12:43:06,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:43:06,782 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-04 12:43:06,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 12:43:06,783 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:06,783 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1] [2018-10-04 12:43:06,783 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:06,783 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:06,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1488350749, now seen corresponding path program 30 times [2018-10-04 12:43:06,783 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:06,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:06,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:06,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:06,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:07,190 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:07,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:07,523 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:07,531 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:43:07,584 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 12:43:07,584 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:07,587 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:07,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:07,760 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-04 12:43:07,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:43:07,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:43:07,761 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:07,761 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-10-04 12:43:07,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:07,796 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 12:43:07,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:43:07,797 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-10-04 12:43:07,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:07,797 INFO L225 Difference]: With dead ends: 37 [2018-10-04 12:43:07,797 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 12:43:07,798 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.4s impTime 18 [2018-10-04 12:43:07,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 12:43:07,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 12:43:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:43:07,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 12:43:07,801 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-04 12:43:07,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:07,801 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 12:43:07,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:43:07,801 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 12:43:07,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:43:07,801 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:07,801 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1] [2018-10-04 12:43:07,801 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:07,801 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:07,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1105768844, now seen corresponding path program 31 times [2018-10-04 12:43:07,802 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:07,802 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:07,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:07,803 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:07,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:08,039 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:08,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:08,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:08,170 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:43:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:08,218 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:08,318 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:08,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:08,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-04 12:43:08,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:43:08,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:43:08,339 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:08,339 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-10-04 12:43:08,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:08,400 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-04 12:43:08,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:43:08,400 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-04 12:43:08,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:08,401 INFO L225 Difference]: With dead ends: 38 [2018-10-04 12:43:08,401 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 12:43:08,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 19 [2018-10-04 12:43:08,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 12:43:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 12:43:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 12:43:08,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-04 12:43:08,404 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-04 12:43:08,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:08,404 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-04 12:43:08,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:43:08,404 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-04 12:43:08,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 12:43:08,404 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:08,405 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1] [2018-10-04 12:43:08,405 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:08,405 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:08,405 INFO L82 PathProgramCache]: Analyzing trace with hash -80902397, now seen corresponding path program 32 times [2018-10-04 12:43:08,405 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:08,405 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:08,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:08,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:43:08,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:09,145 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:09,493 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:09,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:09,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:09,501 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:43:09,543 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:43:09,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:09,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:09,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:09,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-04 12:43:09,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:43:09,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:43:09,859 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:09,859 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-10-04 12:43:09,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:09,927 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 12:43:09,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:43:09,927 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-10-04 12:43:09,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:09,928 INFO L225 Difference]: With dead ends: 39 [2018-10-04 12:43:09,928 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 12:43:09,928 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.8s impTime 20 [2018-10-04 12:43:09,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 12:43:09,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 12:43:09,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 12:43:09,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 12:43:09,931 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-04 12:43:09,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:09,932 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 12:43:09,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:43:09,932 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 12:43:09,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 12:43:09,932 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:09,932 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1] [2018-10-04 12:43:09,932 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:09,932 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:09,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1786994796, now seen corresponding path program 33 times [2018-10-04 12:43:09,933 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:09,933 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:09,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:09,933 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:09,933 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:10,336 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:10,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:10,595 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:10,602 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:43:10,663 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 12:43:10,663 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:10,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:10,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:10,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-04 12:43:10,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:43:10,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:43:10,841 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:10,841 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-10-04 12:43:10,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:10,905 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-04 12:43:10,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:43:10,905 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-10-04 12:43:10,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:10,906 INFO L225 Difference]: With dead ends: 40 [2018-10-04 12:43:10,906 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 12:43:10,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 21 [2018-10-04 12:43:10,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 12:43:10,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 12:43:10,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 12:43:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-04 12:43:10,909 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-04 12:43:10,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:10,909 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-04 12:43:10,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:43:10,910 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-04 12:43:10,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 12:43:10,910 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:10,910 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1] [2018-10-04 12:43:10,910 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:10,910 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:10,910 INFO L82 PathProgramCache]: Analyzing trace with hash -437734365, now seen corresponding path program 34 times [2018-10-04 12:43:10,910 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:10,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:10,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:10,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:10,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:11,264 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:11,624 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:11,626 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:11,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:11,627 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:11,634 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:43:11,681 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:43:11,681 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:11,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:11,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:11,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-04 12:43:11,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 12:43:11,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 12:43:11,907 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:11,907 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-10-04 12:43:11,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:11,973 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 12:43:11,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:43:11,973 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-10-04 12:43:11,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:11,974 INFO L225 Difference]: With dead ends: 41 [2018-10-04 12:43:11,974 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 12:43:11,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.5s impTime 7 [2018-10-04 12:43:11,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 12:43:11,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 12:43:11,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 12:43:11,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 12:43:11,979 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-04 12:43:11,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:11,979 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 12:43:11,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 12:43:11,979 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 12:43:11,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:43:11,980 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:11,980 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1] [2018-10-04 12:43:11,980 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:11,980 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:11,981 INFO L82 PathProgramCache]: Analyzing trace with hash -684861620, now seen corresponding path program 35 times [2018-10-04 12:43:11,981 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:11,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:11,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:11,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:11,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:11,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:12,338 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:12,828 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:12,877 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:12,877 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:12,886 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:43:12,957 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 12:43:12,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:12,962 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:13,075 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:13,095 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:13,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-04 12:43:13,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:43:13,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:43:13,096 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:13,096 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-10-04 12:43:13,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:13,176 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-04 12:43:13,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 12:43:13,183 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-04 12:43:13,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:13,183 INFO L225 Difference]: With dead ends: 42 [2018-10-04 12:43:13,184 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 12:43:13,184 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 8 [2018-10-04 12:43:13,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 12:43:13,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 12:43:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 12:43:13,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-04 12:43:13,186 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-04 12:43:13,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:13,187 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-04 12:43:13,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:43:13,187 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-04 12:43:13,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 12:43:13,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:13,187 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1] [2018-10-04 12:43:13,187 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:13,188 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:13,188 INFO L82 PathProgramCache]: Analyzing trace with hash 244128067, now seen corresponding path program 36 times [2018-10-04 12:43:13,188 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:13,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:13,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:13,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:13,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:13,642 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:14,031 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:14,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:14,278 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:14,286 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:43:14,362 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 12:43:14,362 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:14,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:14,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:14,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-04 12:43:14,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 12:43:14,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 12:43:14,564 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:14,565 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-10-04 12:43:14,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:14,628 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 12:43:14,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 12:43:14,629 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-10-04 12:43:14,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:14,630 INFO L225 Difference]: With dead ends: 43 [2018-10-04 12:43:14,630 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 12:43:14,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.7s impTime 9 [2018-10-04 12:43:14,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 12:43:14,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 12:43:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 12:43:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 12:43:14,632 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-04 12:43:14,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:14,632 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 12:43:14,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 12:43:14,633 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 12:43:14,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 12:43:14,633 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:14,633 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1] [2018-10-04 12:43:14,633 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:14,633 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:14,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1021962708, now seen corresponding path program 37 times [2018-10-04 12:43:14,634 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:14,634 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:14,634 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:14,634 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:14,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:15,649 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:16,323 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:16,422 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:16,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:16,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:43:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:16,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:16,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:16,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-04 12:43:16,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:43:16,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:43:16,597 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:16,597 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-10-04 12:43:16,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:16,714 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-04 12:43:16,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:43:16,714 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-10-04 12:43:16,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:16,715 INFO L225 Difference]: With dead ends: 44 [2018-10-04 12:43:16,715 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 12:43:16,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.4s impTime 10 [2018-10-04 12:43:16,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 12:43:16,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 12:43:16,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 12:43:16,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-04 12:43:16,718 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-04 12:43:16,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:16,718 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-04 12:43:16,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:43:16,719 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-04 12:43:16,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 12:43:16,719 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:16,720 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1] [2018-10-04 12:43:16,720 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:16,720 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:16,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1616071069, now seen corresponding path program 38 times [2018-10-04 12:43:16,720 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:16,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:16,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:16,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:43:16,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:17,157 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:17,530 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:17,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:17,664 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:17,674 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:43:17,725 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:43:17,725 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:17,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:18,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:18,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-04 12:43:18,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:43:18,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:43:18,166 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:18,166 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-10-04 12:43:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:18,236 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 12:43:18,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:43:18,236 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-10-04 12:43:18,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:18,237 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:43:18,237 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 12:43:18,237 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.6s impTime 11 [2018-10-04 12:43:18,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 12:43:18,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 12:43:18,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 12:43:18,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 12:43:18,240 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-04 12:43:18,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:18,240 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 12:43:18,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:43:18,240 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 12:43:18,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 12:43:18,241 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:18,241 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1] [2018-10-04 12:43:18,241 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:18,241 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:18,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1441406220, now seen corresponding path program 39 times [2018-10-04 12:43:18,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:18,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:18,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:18,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:18,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:18,546 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:18,742 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:18,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:18,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:18,852 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:43:18,922 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 12:43:18,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:18,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:19,164 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:19,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-04 12:43:19,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:43:19,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:43:19,165 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:19,165 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-10-04 12:43:19,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:19,258 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-04 12:43:19,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 12:43:19,259 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-04 12:43:19,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:19,259 INFO L225 Difference]: With dead ends: 46 [2018-10-04 12:43:19,260 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 12:43:19,260 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.4s impTime 12 [2018-10-04 12:43:19,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 12:43:19,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 12:43:19,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 12:43:19,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-04 12:43:19,262 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-04 12:43:19,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:19,263 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-04 12:43:19,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:43:19,263 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-04 12:43:19,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 12:43:19,263 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:19,263 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1] [2018-10-04 12:43:19,263 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:19,263 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:19,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1733921667, now seen corresponding path program 40 times [2018-10-04 12:43:19,264 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:19,264 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:19,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:19,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:19,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:20,123 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:20,553 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:20,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:20,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:20,777 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:43:20,829 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:43:20,830 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:20,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:21,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:21,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-04 12:43:21,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 12:43:21,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 12:43:21,139 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:21,139 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-10-04 12:43:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:21,272 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 12:43:21,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 12:43:21,272 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-10-04 12:43:21,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:21,272 INFO L225 Difference]: With dead ends: 47 [2018-10-04 12:43:21,272 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 12:43:21,273 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.0s impTime 13 [2018-10-04 12:43:21,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 12:43:21,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 12:43:21,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 12:43:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-04 12:43:21,275 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-04 12:43:21,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:21,276 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-04 12:43:21,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 12:43:21,276 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-04 12:43:21,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 12:43:21,276 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:21,277 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1] [2018-10-04 12:43:21,277 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:21,277 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:21,277 INFO L82 PathProgramCache]: Analyzing trace with hash -2083001364, now seen corresponding path program 41 times [2018-10-04 12:43:21,277 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:21,277 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:21,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:21,278 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:21,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:21,667 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:22,080 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:22,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:22,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:22,338 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:43:22,424 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 12:43:22,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:22,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:22,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:22,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-04 12:43:22,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:43:22,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:43:22,561 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:22,561 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-10-04 12:43:22,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:22,877 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-04 12:43:22,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:43:22,878 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-10-04 12:43:22,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:22,878 INFO L225 Difference]: With dead ends: 48 [2018-10-04 12:43:22,878 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 12:43:22,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.8s impTime 14 [2018-10-04 12:43:22,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 12:43:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 12:43:22,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 12:43:22,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-04 12:43:22,881 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-04 12:43:22,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:22,881 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-04 12:43:22,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:43:22,882 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-04 12:43:22,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 12:43:22,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:22,882 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1] [2018-10-04 12:43:22,883 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:22,883 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:22,883 INFO L82 PathProgramCache]: Analyzing trace with hash -148531037, now seen corresponding path program 42 times [2018-10-04 12:43:22,883 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:22,883 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:22,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:22,884 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:22,884 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:23,096 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:23,454 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:23,713 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:23,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:23,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:23,721 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:43:23,808 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-04 12:43:23,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:23,813 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:24,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:24,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-04 12:43:24,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 12:43:24,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 12:43:24,146 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:24,147 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-10-04 12:43:24,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:24,221 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 12:43:24,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 12:43:24,222 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-10-04 12:43:24,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:24,222 INFO L225 Difference]: With dead ends: 49 [2018-10-04 12:43:24,223 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:43:24,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 15 [2018-10-04 12:43:24,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:43:24,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 12:43:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 12:43:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 12:43:24,225 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-04 12:43:24,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:24,225 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 12:43:24,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 12:43:24,225 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 12:43:24,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 12:43:24,226 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:24,226 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1] [2018-10-04 12:43:24,226 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:24,226 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:24,226 INFO L82 PathProgramCache]: Analyzing trace with hash -309493044, now seen corresponding path program 43 times [2018-10-04 12:43:24,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:24,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:24,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:24,228 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:24,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:24,706 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:25,505 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:25,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:25,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:25,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:43:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:25,881 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:26,046 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:26,066 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:26,066 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-04 12:43:26,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 12:43:26,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 12:43:26,067 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:26,067 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-10-04 12:43:26,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:26,242 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-04 12:43:26,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 12:43:26,242 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-04 12:43:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:26,243 INFO L225 Difference]: With dead ends: 50 [2018-10-04 12:43:26,243 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 12:43:26,243 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 0.9s impTime 16 [2018-10-04 12:43:26,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 12:43:26,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 12:43:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 12:43:26,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-04 12:43:26,246 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-04 12:43:26,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:26,246 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-04 12:43:26,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 12:43:26,246 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-04 12:43:26,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 12:43:26,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:26,247 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1] [2018-10-04 12:43:26,248 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:26,248 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:26,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1004347965, now seen corresponding path program 44 times [2018-10-04 12:43:26,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:26,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:26,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:26,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:43:26,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:26,752 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:27,128 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:27,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:27,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:27,545 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:43:27,604 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:43:27,605 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:27,609 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:27,723 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:27,723 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-04 12:43:27,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:43:27,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:43:27,724 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:27,724 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-10-04 12:43:27,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:27,799 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 12:43:27,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:43:27,800 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-10-04 12:43:27,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:27,800 INFO L225 Difference]: With dead ends: 51 [2018-10-04 12:43:27,800 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 12:43:27,801 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 1.0s impTime 17 [2018-10-04 12:43:27,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 12:43:27,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 12:43:27,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 12:43:27,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-04 12:43:27,803 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-04 12:43:27,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:27,803 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-04 12:43:27,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:43:27,803 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-04 12:43:27,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 12:43:27,803 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:27,804 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1] [2018-10-04 12:43:27,804 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:27,804 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:27,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1070014036, now seen corresponding path program 45 times [2018-10-04 12:43:27,804 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:27,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:27,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:27,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:27,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:28,130 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:28,703 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:28,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:28,835 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:28,844 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:43:28,931 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 12:43:28,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:28,936 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:29,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:29,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-04 12:43:29,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 12:43:29,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 12:43:29,158 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:29,158 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-10-04 12:43:29,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:29,497 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-04 12:43:29,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:43:29,497 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-10-04 12:43:29,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:29,498 INFO L225 Difference]: With dead ends: 52 [2018-10-04 12:43:29,498 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 12:43:29,498 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.6s impTime 18 [2018-10-04 12:43:29,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 12:43:29,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 12:43:29,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 12:43:29,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-04 12:43:29,500 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-04 12:43:29,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:29,500 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-04 12:43:29,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 12:43:29,500 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-04 12:43:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 12:43:29,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:29,501 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1] [2018-10-04 12:43:29,501 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:29,501 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:29,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1189305059, now seen corresponding path program 46 times [2018-10-04 12:43:29,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:29,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:29,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:29,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:29,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:29,798 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:30,222 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:30,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:30,650 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:30,657 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:43:30,720 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:43:30,720 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:30,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:30,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:30,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-04 12:43:30,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 12:43:30,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 12:43:30,880 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:30,880 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-10-04 12:43:30,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:30,988 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 12:43:30,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 12:43:30,989 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-10-04 12:43:30,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:30,989 INFO L225 Difference]: With dead ends: 53 [2018-10-04 12:43:30,990 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 12:43:30,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime 19 [2018-10-04 12:43:30,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 12:43:30,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 12:43:30,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 12:43:30,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 12:43:30,992 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-04 12:43:30,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:30,993 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 12:43:30,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 12:43:30,993 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 12:43:30,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 12:43:30,993 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:30,993 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1] [2018-10-04 12:43:30,994 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:30,994 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:30,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1786247028, now seen corresponding path program 47 times [2018-10-04 12:43:30,994 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:30,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:30,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:30,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:30,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:31,663 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:31,852 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:32,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:32,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:32,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:32,152 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:43:32,249 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 12:43:32,249 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:32,254 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:32,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:32,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-04 12:43:32,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:43:32,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:43:32,404 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:32,404 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-10-04 12:43:32,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:32,476 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-04 12:43:32,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:43:32,477 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-04 12:43:32,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:32,478 INFO L225 Difference]: With dead ends: 54 [2018-10-04 12:43:32,478 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 12:43:32,478 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.8s impTime 20 [2018-10-04 12:43:32,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 12:43:32,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 12:43:32,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 12:43:32,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-04 12:43:32,481 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-04 12:43:32,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:32,481 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-04 12:43:32,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:43:32,482 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-04 12:43:32,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 12:43:32,482 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:32,482 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1] [2018-10-04 12:43:32,482 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:32,482 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:32,483 INFO L82 PathProgramCache]: Analyzing trace with hash 460918787, now seen corresponding path program 48 times [2018-10-04 12:43:32,483 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:32,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:32,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:32,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:32,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:32,774 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:33,021 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:33,219 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:33,219 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:33,226 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:43:33,316 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 12:43:33,316 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:33,321 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:33,472 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:33,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-04 12:43:33,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 12:43:33,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 12:43:33,473 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:33,473 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-10-04 12:43:33,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:33,546 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 12:43:33,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:43:33,547 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-10-04 12:43:33,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:33,548 INFO L225 Difference]: With dead ends: 55 [2018-10-04 12:43:33,548 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 12:43:33,548 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.5s impTime 21 [2018-10-04 12:43:33,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 12:43:33,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 12:43:33,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 12:43:33,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-04 12:43:33,551 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-04 12:43:33,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:33,551 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-04 12:43:33,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 12:43:33,551 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-04 12:43:33,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 12:43:33,552 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:33,552 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1] [2018-10-04 12:43:33,552 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:33,552 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:33,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1403582316, now seen corresponding path program 49 times [2018-10-04 12:43:33,553 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:33,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:33,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:33,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:33,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:34,833 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:35,107 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:35,337 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:35,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:35,342 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:35,349 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:43:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:35,419 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:35,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:35,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-04 12:43:35,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 12:43:35,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 12:43:35,563 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:35,563 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-10-04 12:43:35,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:35,653 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-04 12:43:35,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 12:43:35,654 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-10-04 12:43:35,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:35,655 INFO L225 Difference]: With dead ends: 56 [2018-10-04 12:43:35,655 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 12:43:35,655 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.3s impTime 7 [2018-10-04 12:43:35,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 12:43:35,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 12:43:35,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 12:43:35,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-04 12:43:35,658 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-04 12:43:35,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:35,658 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-04 12:43:35,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 12:43:35,658 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-04 12:43:35,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 12:43:35,658 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:35,658 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1] [2018-10-04 12:43:35,659 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:35,659 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:35,659 INFO L82 PathProgramCache]: Analyzing trace with hash 561380643, now seen corresponding path program 50 times [2018-10-04 12:43:35,659 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:35,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:35,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:35,660 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:43:35,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:35,914 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:36,081 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:36,512 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:36,589 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:36,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:36,597 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:43:36,666 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:43:36,667 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:36,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:36,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:36,863 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:36,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-04 12:43:36,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:43:36,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:43:36,864 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:36,864 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-10-04 12:43:36,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:36,946 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 12:43:36,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:43:36,946 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-10-04 12:43:36,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:36,947 INFO L225 Difference]: With dead ends: 57 [2018-10-04 12:43:36,948 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 12:43:36,948 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.6s impTime 8 [2018-10-04 12:43:36,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 12:43:36,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 12:43:36,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 12:43:36,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 12:43:36,950 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-04 12:43:36,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:36,950 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 12:43:36,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:43:36,950 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 12:43:36,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 12:43:36,951 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:36,951 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1] [2018-10-04 12:43:36,951 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:36,951 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:36,951 INFO L82 PathProgramCache]: Analyzing trace with hash 222932556, now seen corresponding path program 51 times [2018-10-04 12:43:36,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:36,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:36,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:36,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:36,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:37,385 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:37,783 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:38,396 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:38,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:38,486 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:38,486 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:38,493 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:43:38,628 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 12:43:38,628 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:38,633 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:38,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:38,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-04 12:43:38,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 12:43:38,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 12:43:38,777 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:38,777 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-10-04 12:43:38,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:38,871 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-04 12:43:38,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 12:43:38,872 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-04 12:43:38,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:38,872 INFO L225 Difference]: With dead ends: 58 [2018-10-04 12:43:38,872 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 12:43:38,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.2s impTime 9 [2018-10-04 12:43:38,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 12:43:38,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 12:43:38,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 12:43:38,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-04 12:43:38,874 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-04 12:43:38,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:38,875 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-04 12:43:38,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 12:43:38,875 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-04 12:43:38,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 12:43:38,875 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:38,875 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1] [2018-10-04 12:43:38,876 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:38,876 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:38,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1679023549, now seen corresponding path program 52 times [2018-10-04 12:43:38,876 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:38,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:38,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:38,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:38,877 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:39,926 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:40,338 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:40,616 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:40,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:40,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:40,762 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:43:40,832 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:43:40,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:40,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:41,040 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:41,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-04 12:43:41,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 12:43:41,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 12:43:41,041 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:41,041 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-10-04 12:43:41,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:41,147 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 12:43:41,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 12:43:41,148 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-10-04 12:43:41,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:41,149 INFO L225 Difference]: With dead ends: 59 [2018-10-04 12:43:41,149 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 12:43:41,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.3s impTime 10 [2018-10-04 12:43:41,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 12:43:41,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 12:43:41,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 12:43:41,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-04 12:43:41,153 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-04 12:43:41,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:41,154 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-04 12:43:41,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 12:43:41,154 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-04 12:43:41,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 12:43:41,154 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:41,154 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1] [2018-10-04 12:43:41,154 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:41,155 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:41,155 INFO L82 PathProgramCache]: Analyzing trace with hash -510120660, now seen corresponding path program 53 times [2018-10-04 12:43:41,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:41,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:41,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:41,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:41,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:41,425 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:42,129 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:42,715 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:42,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:42,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:42,912 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:43:43,027 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 12:43:43,027 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:43,033 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:43,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:43,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-04 12:43:43,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 12:43:43,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 12:43:43,176 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:43,176 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-10-04 12:43:43,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:43,276 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-04 12:43:43,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 12:43:43,276 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-10-04 12:43:43,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:43,277 INFO L225 Difference]: With dead ends: 60 [2018-10-04 12:43:43,277 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 12:43:43,277 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.5s impTime 11 [2018-10-04 12:43:43,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 12:43:43,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 12:43:43,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 12:43:43,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-04 12:43:43,279 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-04 12:43:43,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:43,279 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-04 12:43:43,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 12:43:43,279 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-04 12:43:43,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 12:43:43,280 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:43,280 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1] [2018-10-04 12:43:43,280 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:43,280 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:43,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1366130531, now seen corresponding path program 54 times [2018-10-04 12:43:43,280 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:43,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:43,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:43,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:43,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:43,486 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:43,737 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:44,173 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:44,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:44,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:44,363 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:43:44,471 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 12:43:44,472 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:44,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:44,661 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:44,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-10-04 12:43:44,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 12:43:44,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 12:43:44,662 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:44,662 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-10-04 12:43:44,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:44,760 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 12:43:44,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 12:43:44,761 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-10-04 12:43:44,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:44,762 INFO L225 Difference]: With dead ends: 61 [2018-10-04 12:43:44,762 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 12:43:44,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.8s impTime 12 [2018-10-04 12:43:44,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 12:43:44,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 12:43:44,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 12:43:44,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 12:43:44,763 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-04 12:43:44,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:44,764 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 12:43:44,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 12:43:44,764 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 12:43:44,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 12:43:44,764 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:44,764 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1] [2018-10-04 12:43:44,765 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:44,765 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:44,765 INFO L82 PathProgramCache]: Analyzing trace with hash -599624692, now seen corresponding path program 55 times [2018-10-04 12:43:44,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:44,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:44,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:44,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:44,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:45,025 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:45,211 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:45,629 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:45,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:45,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:45,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:43:45,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:45,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:46,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:46,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:46,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-04 12:43:46,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 12:43:46,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 12:43:46,133 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:46,134 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-10-04 12:43:46,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:46,252 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-04 12:43:46,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 12:43:46,253 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-04 12:43:46,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:46,253 INFO L225 Difference]: With dead ends: 62 [2018-10-04 12:43:46,253 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 12:43:46,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.9s impTime 13 [2018-10-04 12:43:46,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 12:43:46,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 12:43:46,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 12:43:46,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-04 12:43:46,256 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-04 12:43:46,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:46,256 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-04 12:43:46,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 12:43:46,256 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-04 12:43:46,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 12:43:46,257 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:46,257 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1] [2018-10-04 12:43:46,257 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:46,257 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:46,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1408494461, now seen corresponding path program 56 times [2018-10-04 12:43:46,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:46,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:46,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:46,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:43:46,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:46,478 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:47,023 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:47,478 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:47,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:47,735 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:47,744 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:43:47,818 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:43:47,818 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:47,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:48,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:48,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-10-04 12:43:48,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:43:48,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:43:48,003 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:48,004 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-10-04 12:43:48,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:48,098 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 12:43:48,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:43:48,099 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-10-04 12:43:48,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:48,100 INFO L225 Difference]: With dead ends: 63 [2018-10-04 12:43:48,100 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 12:43:48,100 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.1s impTime 14 [2018-10-04 12:43:48,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 12:43:48,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 12:43:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 12:43:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-04 12:43:48,103 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-04 12:43:48,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:48,103 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-04 12:43:48,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:43:48,103 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-04 12:43:48,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 12:43:48,104 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:48,104 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1] [2018-10-04 12:43:48,104 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:48,104 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:48,105 INFO L82 PathProgramCache]: Analyzing trace with hash -713653524, now seen corresponding path program 57 times [2018-10-04 12:43:48,105 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:48,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:48,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:48,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:48,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:48,383 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:48,786 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:49,377 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:49,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:49,757 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:49,764 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:43:49,881 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-04 12:43:49,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:49,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:50,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:50,091 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:50,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-04 12:43:50,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 12:43:50,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 12:43:50,092 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:50,092 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-10-04 12:43:50,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:50,197 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-04 12:43:50,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 12:43:50,197 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-10-04 12:43:50,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:50,198 INFO L225 Difference]: With dead ends: 64 [2018-10-04 12:43:50,198 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 12:43:50,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.4s impTime 15 [2018-10-04 12:43:50,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 12:43:50,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-04 12:43:50,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 12:43:50,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-04 12:43:50,201 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-04 12:43:50,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:50,201 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-04 12:43:50,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 12:43:50,201 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-04 12:43:50,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-04 12:43:50,202 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:50,202 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1] [2018-10-04 12:43:50,202 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:50,202 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:50,202 INFO L82 PathProgramCache]: Analyzing trace with hash -648420957, now seen corresponding path program 58 times [2018-10-04 12:43:50,202 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:50,202 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:50,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:50,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:50,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:50,409 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:50,801 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:51,065 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:51,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:51,491 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:51,500 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:43:51,579 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:43:51,579 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:51,585 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:51,743 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:51,744 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-10-04 12:43:51,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 12:43:51,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 12:43:51,744 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:51,745 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-10-04 12:43:51,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:51,928 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 12:43:51,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 12:43:51,928 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-10-04 12:43:51,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:51,929 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:43:51,929 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 12:43:51,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime 16 [2018-10-04 12:43:51,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 12:43:51,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 12:43:51,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 12:43:51,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-04 12:43:51,932 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-04 12:43:51,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:51,932 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-04 12:43:51,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 12:43:51,933 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-04 12:43:51,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:43:51,933 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:51,933 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1] [2018-10-04 12:43:51,934 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:51,934 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:51,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1373788620, now seen corresponding path program 59 times [2018-10-04 12:43:51,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:51,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:51,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:51,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:51,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:52,294 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:52,687 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:53,283 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:53,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:53,748 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:53,755 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:43:53,888 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 12:43:53,889 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:53,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:54,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:54,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-04 12:43:54,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 12:43:54,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 12:43:54,131 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:54,131 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-10-04 12:43:54,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:54,243 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-04 12:43:54,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 12:43:54,244 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-04 12:43:54,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:54,244 INFO L225 Difference]: With dead ends: 66 [2018-10-04 12:43:54,244 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 12:43:54,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.5s impTime 17 [2018-10-04 12:43:54,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 12:43:54,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 12:43:54,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 12:43:54,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-04 12:43:54,246 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-04 12:43:54,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:54,246 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-04 12:43:54,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 12:43:54,247 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-04 12:43:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 12:43:54,247 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:54,247 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1] [2018-10-04 12:43:54,247 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:54,248 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:54,248 INFO L82 PathProgramCache]: Analyzing trace with hash -362223933, now seen corresponding path program 60 times [2018-10-04 12:43:54,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:54,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:54,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:54,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:54,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:54,501 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:54,678 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:55,033 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:55,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:55,391 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:55,400 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:43:55,524 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 12:43:55,524 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:55,531 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:55,767 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:55,767 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-10-04 12:43:55,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 12:43:55,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 12:43:55,768 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:55,768 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-10-04 12:43:55,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:55,870 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-04 12:43:55,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 12:43:55,870 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-10-04 12:43:55,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:55,871 INFO L225 Difference]: With dead ends: 67 [2018-10-04 12:43:55,871 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 12:43:55,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 0.9s impTime 18 [2018-10-04 12:43:55,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 12:43:55,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 12:43:55,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 12:43:55,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-04 12:43:55,873 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-04 12:43:55,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:55,873 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-04 12:43:55,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 12:43:55,873 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-04 12:43:55,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 12:43:55,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:55,873 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1] [2018-10-04 12:43:55,874 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:55,874 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:55,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1655961772, now seen corresponding path program 61 times [2018-10-04 12:43:55,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:55,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:55,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:55,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:43:55,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:56,163 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:56,427 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:56,674 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:57,237 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:57,238 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:57,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:43:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:57,334 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:43:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:57,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:43:57,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-04 12:43:57,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 12:43:57,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 12:43:57,508 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:43:57,509 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-10-04 12:43:57,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:43:57,625 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-04 12:43:57,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 12:43:57,625 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-10-04 12:43:57,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:43:57,626 INFO L225 Difference]: With dead ends: 68 [2018-10-04 12:43:57,626 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 12:43:57,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.1s impTime 19 [2018-10-04 12:43:57,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 12:43:57,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 12:43:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 12:43:57,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-04 12:43:57,628 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-04 12:43:57,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:43:57,629 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-04 12:43:57,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 12:43:57,629 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-04 12:43:57,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 12:43:57,629 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:43:57,629 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1] [2018-10-04 12:43:57,630 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:43:57,630 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:43:57,630 INFO L82 PathProgramCache]: Analyzing trace with hash -204790813, now seen corresponding path program 62 times [2018-10-04 12:43:57,630 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:43:57,630 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:43:57,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:57,631 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:43:57,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:43:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:43:57,887 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:43:58,134 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:58,374 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:43:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:43:58,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:43:58,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:43:58,740 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:43:58,826 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:43:58,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:43:58,834 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:44:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:00,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:44:00,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-10-04 12:44:00,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 12:44:00,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 12:44:00,243 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:44:00,243 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-10-04 12:44:00,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:44:00,430 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-04 12:44:00,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 12:44:00,430 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-10-04 12:44:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:44:00,431 INFO L225 Difference]: With dead ends: 69 [2018-10-04 12:44:00,431 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 12:44:00,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 0.8s impTime 20 [2018-10-04 12:44:00,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 12:44:00,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 12:44:00,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 12:44:00,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-04 12:44:00,433 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-04 12:44:00,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:44:00,433 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-04 12:44:00,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 12:44:00,434 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-04 12:44:00,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 12:44:00,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:44:00,434 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1] [2018-10-04 12:44:00,434 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:44:00,434 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:44:00,434 INFO L82 PathProgramCache]: Analyzing trace with hash -2053546100, now seen corresponding path program 63 times [2018-10-04 12:44:00,434 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:44:00,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:44:00,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:00,435 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:44:00,435 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:00,651 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:44:00,838 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:01,219 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:01,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:44:01,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:44:01,724 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:44:01,947 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-04 12:44:01,947 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:44:01,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:44:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:02,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:44:02,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-04 12:44:02,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 12:44:02,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 12:44:02,361 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:44:02,361 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-10-04 12:44:02,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:44:02,585 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-04 12:44:02,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 12:44:02,586 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-04 12:44:02,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:44:02,587 INFO L225 Difference]: With dead ends: 70 [2018-10-04 12:44:02,587 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 12:44:02,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.0s impTime 21 [2018-10-04 12:44:02,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 12:44:02,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 12:44:02,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 12:44:02,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-04 12:44:02,590 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-04 12:44:02,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:44:02,590 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-04 12:44:02,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 12:44:02,590 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-04 12:44:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 12:44:02,590 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:44:02,591 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1] [2018-10-04 12:44:02,591 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:44:02,591 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:44:02,591 INFO L82 PathProgramCache]: Analyzing trace with hash 764582147, now seen corresponding path program 64 times [2018-10-04 12:44:02,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:44:02,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:44:02,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:02,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:44:02,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:03,179 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:44:03,612 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:04,224 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:04,965 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:44:04,965 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:44:04,982 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:44:05,075 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:44:05,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:44:05,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:44:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:05,257 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:44:05,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-10-04 12:44:05,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 12:44:05,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 12:44:05,258 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:44:05,258 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-10-04 12:44:05,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:44:05,417 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-04 12:44:05,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 12:44:05,417 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-10-04 12:44:05,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:44:05,418 INFO L225 Difference]: With dead ends: 71 [2018-10-04 12:44:05,418 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 12:44:05,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.0s impTime 22 [2018-10-04 12:44:05,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 12:44:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 12:44:05,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 12:44:05,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-04 12:44:05,420 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-04 12:44:05,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:44:05,421 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-04 12:44:05,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 12:44:05,421 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-04 12:44:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 12:44:05,421 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:44:05,421 INFO L375 BasicCegarLoop]: trace histogram [65, 1, 1, 1] [2018-10-04 12:44:05,421 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:44:05,422 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:44:05,422 INFO L82 PathProgramCache]: Analyzing trace with hash -2067755412, now seen corresponding path program 65 times [2018-10-04 12:44:05,422 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:44:05,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:44:05,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:05,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:44:05,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:05,699 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:44:05,995 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:06,312 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:07,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:44:07,306 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:44:07,313 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:44:07,462 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-04 12:44:07,462 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:44:07,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:44:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:07,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:44:07,742 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-04 12:44:07,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 12:44:07,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 12:44:07,743 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:44:07,743 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. [2018-10-04 12:44:07,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:44:07,876 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2018-10-04 12:44:07,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-04 12:44:07,876 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 68 [2018-10-04 12:44:07,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:44:07,877 INFO L225 Difference]: With dead ends: 72 [2018-10-04 12:44:07,877 INFO L226 Difference]: Without dead ends: 70 [2018-10-04 12:44:07,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.6s impTime 23 [2018-10-04 12:44:07,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-10-04 12:44:07,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-10-04 12:44:07,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-04 12:44:07,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2018-10-04 12:44:07,879 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2018-10-04 12:44:07,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:44:07,880 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2018-10-04 12:44:07,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-04 12:44:07,880 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2018-10-04 12:44:07,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-10-04 12:44:07,880 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:44:07,880 INFO L375 BasicCegarLoop]: trace histogram [66, 1, 1, 1] [2018-10-04 12:44:07,881 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:44:07,881 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:44:07,881 INFO L82 PathProgramCache]: Analyzing trace with hash 324093475, now seen corresponding path program 66 times [2018-10-04 12:44:07,881 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:44:07,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:44:07,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:07,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:44:07,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:08,181 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:44:08,559 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:09,137 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:09,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:09,359 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:44:09,359 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:44:09,366 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:44:09,506 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-04 12:44:09,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:44:09,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:44:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:10,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:44:10,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-10-04 12:44:10,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-10-04 12:44:10,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-10-04 12:44:10,424 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:44:10,424 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 69 states. [2018-10-04 12:44:10,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:44:10,520 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-10-04 12:44:10,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-10-04 12:44:10,521 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 69 [2018-10-04 12:44:10,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:44:10,521 INFO L225 Difference]: With dead ends: 73 [2018-10-04 12:44:10,521 INFO L226 Difference]: Without dead ends: 71 [2018-10-04 12:44:10,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.1s impTime 24 [2018-10-04 12:44:10,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-04 12:44:10,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-04 12:44:10,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-04 12:44:10,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2018-10-04 12:44:10,524 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2018-10-04 12:44:10,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:44:10,524 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2018-10-04 12:44:10,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-10-04 12:44:10,524 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2018-10-04 12:44:10,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-04 12:44:10,525 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:44:10,525 INFO L375 BasicCegarLoop]: trace histogram [67, 1, 1, 1] [2018-10-04 12:44:10,525 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:44:10,525 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:44:10,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1456964940, now seen corresponding path program 67 times [2018-10-04 12:44:10,525 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:44:10,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:44:10,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:10,526 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:44:10,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:10,816 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:44:11,228 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:11,799 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:13,031 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:44:13,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:13,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:44:13,037 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:44:13,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:44:13,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:13,139 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:44:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:13,305 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:44:13,305 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-04 12:44:13,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-04 12:44:13,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-04 12:44:13,306 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:44:13,306 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 70 states. [2018-10-04 12:44:13,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:44:13,455 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2018-10-04 12:44:13,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-04 12:44:13,455 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 70 [2018-10-04 12:44:13,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:44:13,456 INFO L225 Difference]: With dead ends: 74 [2018-10-04 12:44:13,456 INFO L226 Difference]: Without dead ends: 72 [2018-10-04 12:44:13,456 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.1s impTime 8 [2018-10-04 12:44:13,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-10-04 12:44:13,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2018-10-04 12:44:13,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-10-04 12:44:13,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2018-10-04 12:44:13,460 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2018-10-04 12:44:13,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:44:13,460 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2018-10-04 12:44:13,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-04 12:44:13,460 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2018-10-04 12:44:13,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2018-10-04 12:44:13,461 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:44:13,461 INFO L375 BasicCegarLoop]: trace histogram [68, 1, 1, 1] [2018-10-04 12:44:13,461 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:44:13,461 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:44:13,461 INFO L82 PathProgramCache]: Analyzing trace with hash -2078725309, now seen corresponding path program 68 times [2018-10-04 12:44:13,461 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:44:13,461 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:44:13,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:13,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:44:13,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:13,792 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:44:14,154 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:14,731 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:15,777 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:44:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:15,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:44:15,787 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:44:15,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:44:15,891 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:44:15,891 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:44:15,897 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:44:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:16,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:44:16,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-10-04 12:44:16,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 12:44:16,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 12:44:16,594 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:44:16,594 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 71 states. [2018-10-04 12:44:16,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:44:16,760 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2018-10-04 12:44:16,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-10-04 12:44:16,760 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 71 [2018-10-04 12:44:16,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:44:16,761 INFO L225 Difference]: With dead ends: 75 [2018-10-04 12:44:16,761 INFO L226 Difference]: Without dead ends: 73 [2018-10-04 12:44:16,762 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 1.9s impTime 9 [2018-10-04 12:44:16,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-10-04 12:44:16,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-10-04 12:44:16,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 12:44:16,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-10-04 12:44:16,765 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2018-10-04 12:44:16,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:44:16,765 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-10-04 12:44:16,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 12:44:16,765 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-10-04 12:44:16,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 12:44:16,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:44:16,766 INFO L375 BasicCegarLoop]: trace histogram [69, 1, 1, 1] [2018-10-04 12:44:16,766 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:44:16,766 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:44:16,766 INFO L82 PathProgramCache]: Analyzing trace with hash -15973332, now seen corresponding path program 69 times [2018-10-04 12:44:16,766 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:44:16,766 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:44:16,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:16,767 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:44:16,767 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:16,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:17,105 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:44:17,809 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:18,387 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:19,354 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:44:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:19,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:44:19,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:44:19,492 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:44:19,684 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-04 12:44:19,684 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:44:19,690 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:44:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:19,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:44:19,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-04 12:44:19,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-04 12:44:19,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-04 12:44:19,871 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:44:19,871 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 72 states. [2018-10-04 12:44:20,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:44:20,077 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2018-10-04 12:44:20,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 12:44:20,078 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 72 [2018-10-04 12:44:20,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:44:20,078 INFO L225 Difference]: With dead ends: 76 [2018-10-04 12:44:20,078 INFO L226 Difference]: Without dead ends: 74 [2018-10-04 12:44:20,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.3s impTime 10 [2018-10-04 12:44:20,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-04 12:44:20,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2018-10-04 12:44:20,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-04 12:44:20,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2018-10-04 12:44:20,081 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2018-10-04 12:44:20,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:44:20,081 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2018-10-04 12:44:20,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-04 12:44:20,082 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2018-10-04 12:44:20,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-04 12:44:20,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:44:20,082 INFO L375 BasicCegarLoop]: trace histogram [70, 1, 1, 1] [2018-10-04 12:44:20,082 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:44:20,083 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:44:20,083 INFO L82 PathProgramCache]: Analyzing trace with hash -495171485, now seen corresponding path program 70 times [2018-10-04 12:44:20,083 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:44:20,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:44:20,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:20,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:44:20,084 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:20,390 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:44:20,756 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:21,120 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:21,422 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:44:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:21,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:44:21,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:44:21,509 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:44:21,613 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:44:21,613 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:44:21,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:44:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:21,794 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:44:21,794 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-10-04 12:44:21,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-10-04 12:44:21,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-10-04 12:44:21,795 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:44:21,795 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 73 states. [2018-10-04 12:44:22,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:44:22,010 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2018-10-04 12:44:22,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-10-04 12:44:22,011 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 73 [2018-10-04 12:44:22,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:44:22,011 INFO L225 Difference]: With dead ends: 77 [2018-10-04 12:44:22,011 INFO L226 Difference]: Without dead ends: 75 [2018-10-04 12:44:22,012 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.0s impTime 11 [2018-10-04 12:44:22,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-10-04 12:44:22,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-10-04 12:44:22,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 12:44:22,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2018-10-04 12:44:22,015 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2018-10-04 12:44:22,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:44:22,015 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2018-10-04 12:44:22,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-10-04 12:44:22,016 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2018-10-04 12:44:22,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 12:44:22,016 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:44:22,016 INFO L375 BasicCegarLoop]: trace histogram [71, 1, 1, 1] [2018-10-04 12:44:22,017 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:44:22,017 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:44:22,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1829554956, now seen corresponding path program 71 times [2018-10-04 12:44:22,017 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:44:22,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:44:22,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:22,018 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:44:22,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:22,257 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:44:22,478 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:23,119 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:24,062 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:44:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:24,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:44:24,307 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:44:24,313 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:44:24,481 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-04 12:44:24,481 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:44:24,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:44:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:24,834 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:44:24,834 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-04 12:44:24,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 12:44:24,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 12:44:24,835 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:44:24,835 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 74 states. [2018-10-04 12:44:24,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:44:24,984 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-10-04 12:44:24,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-04 12:44:24,984 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 74 [2018-10-04 12:44:24,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:44:24,985 INFO L225 Difference]: With dead ends: 78 [2018-10-04 12:44:24,985 INFO L226 Difference]: Without dead ends: 76 [2018-10-04 12:44:24,985 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 1.9s impTime 12 [2018-10-04 12:44:24,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-04 12:44:24,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-04 12:44:24,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-04 12:44:24,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2018-10-04 12:44:24,988 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2018-10-04 12:44:24,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:44:24,988 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2018-10-04 12:44:24,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 12:44:24,988 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2018-10-04 12:44:24,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2018-10-04 12:44:24,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:44:24,989 INFO L375 BasicCegarLoop]: trace histogram [72, 1, 1, 1] [2018-10-04 12:44:24,989 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:44:24,989 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:44:24,989 INFO L82 PathProgramCache]: Analyzing trace with hash 881630595, now seen corresponding path program 72 times [2018-10-04 12:44:24,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:44:24,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:44:24,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:24,990 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:44:24,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:25,244 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:44:25,636 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:26,115 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:27,079 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:44:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:27,383 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:44:27,383 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:44:27,390 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:44:27,549 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-04 12:44:27,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:44:27,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:44:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:27,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:44:27,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-10-04 12:44:27,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 12:44:27,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 12:44:27,860 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:44:27,860 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 75 states. [2018-10-04 12:44:28,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:44:28,081 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2018-10-04 12:44:28,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 12:44:28,081 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 75 [2018-10-04 12:44:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:44:28,082 INFO L225 Difference]: With dead ends: 79 [2018-10-04 12:44:28,082 INFO L226 Difference]: Without dead ends: 77 [2018-10-04 12:44:28,082 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.0s impTime 13 [2018-10-04 12:44:28,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2018-10-04 12:44:28,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-10-04 12:44:28,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 12:44:28,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2018-10-04 12:44:28,085 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2018-10-04 12:44:28,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:44:28,085 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2018-10-04 12:44:28,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 12:44:28,085 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2018-10-04 12:44:28,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 12:44:28,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:44:28,086 INFO L375 BasicCegarLoop]: trace histogram [73, 1, 1, 1] [2018-10-04 12:44:28,086 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:44:28,086 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:44:28,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1560746476, now seen corresponding path program 73 times [2018-10-04 12:44:28,086 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:44:28,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:44:28,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:28,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:44:28,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:28,698 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:44:29,133 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:29,720 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:30,667 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:44:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:31,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:44:31,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:44:31,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:44:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:31,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:44:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:31,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:44:31,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-04 12:44:31,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-04 12:44:31,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-04 12:44:31,339 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:44:31,339 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 76 states. [2018-10-04 12:44:31,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:44:31,509 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2018-10-04 12:44:31,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-04 12:44:31,509 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 76 [2018-10-04 12:44:31,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:44:31,510 INFO L225 Difference]: With dead ends: 80 [2018-10-04 12:44:31,510 INFO L226 Difference]: Without dead ends: 78 [2018-10-04 12:44:31,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.5s impTime 14 [2018-10-04 12:44:31,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-04 12:44:31,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-10-04 12:44:31,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-10-04 12:44:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-10-04 12:44:31,513 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2018-10-04 12:44:31,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:44:31,513 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-10-04 12:44:31,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-04 12:44:31,513 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-10-04 12:44:31,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-04 12:44:31,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:44:31,513 INFO L375 BasicCegarLoop]: trace histogram [74, 1, 1, 1] [2018-10-04 12:44:31,514 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:44:31,514 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:44:31,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1138502307, now seen corresponding path program 74 times [2018-10-04 12:44:31,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:44:31,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:44:31,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:31,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:44:31,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:31,840 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:44:32,219 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:33,003 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:33,947 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:44:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:34,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:44:34,355 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:44:34,362 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:44:34,463 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:44:34,463 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:44:34,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:44:34,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:34,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:44:34,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-10-04 12:44:34,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 12:44:34,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 12:44:34,698 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:44:34,698 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 77 states. [2018-10-04 12:44:34,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:44:34,865 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2018-10-04 12:44:34,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-10-04 12:44:34,865 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 77 [2018-10-04 12:44:34,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:44:34,865 INFO L225 Difference]: With dead ends: 81 [2018-10-04 12:44:34,866 INFO L226 Difference]: Without dead ends: 79 [2018-10-04 12:44:34,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.4s impTime 15 [2018-10-04 12:44:34,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-04 12:44:34,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-10-04 12:44:34,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2018-10-04 12:44:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2018-10-04 12:44:34,868 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2018-10-04 12:44:34,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:44:34,868 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2018-10-04 12:44:34,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 12:44:34,869 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2018-10-04 12:44:34,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-04 12:44:34,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:44:34,869 INFO L375 BasicCegarLoop]: trace histogram [75, 1, 1, 1] [2018-10-04 12:44:34,870 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:44:34,870 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:44:34,870 INFO L82 PathProgramCache]: Analyzing trace with hash 933834956, now seen corresponding path program 75 times [2018-10-04 12:44:34,870 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:44:34,870 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:44:34,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:34,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:44:34,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:35,144 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:44:35,555 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:36,124 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:37,141 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:44:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:37,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:44:37,633 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:44:37,640 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:44:37,820 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-04 12:44:37,821 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:44:37,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:44:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:38,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:44:38,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-04 12:44:38,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-04 12:44:38,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-04 12:44:38,166 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:44:38,166 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 78 states. [2018-10-04 12:44:38,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:44:38,940 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2018-10-04 12:44:38,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-04 12:44:38,941 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 78 [2018-10-04 12:44:38,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:44:38,941 INFO L225 Difference]: With dead ends: 82 [2018-10-04 12:44:38,941 INFO L226 Difference]: Without dead ends: 80 [2018-10-04 12:44:38,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.3s impTime 16 [2018-10-04 12:44:38,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-10-04 12:44:38,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2018-10-04 12:44:38,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 12:44:38,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2018-10-04 12:44:38,943 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2018-10-04 12:44:38,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:44:38,943 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2018-10-04 12:44:38,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-04 12:44:38,943 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2018-10-04 12:44:38,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-04 12:44:38,944 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:44:38,944 INFO L375 BasicCegarLoop]: trace histogram [76, 1, 1, 1] [2018-10-04 12:44:38,944 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:44:38,944 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:44:38,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1115885629, now seen corresponding path program 76 times [2018-10-04 12:44:38,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:44:38,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:44:38,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:38,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:44:38,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:39,196 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:44:39,578 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:40,192 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:41,142 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:44:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:41,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:44:41,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:44:41,712 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:44:41,813 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:44:41,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:44:41,819 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:44:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:42,007 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:44:42,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2018-10-04 12:44:42,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-10-04 12:44:42,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-10-04 12:44:42,008 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:44:42,008 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 79 states. [2018-10-04 12:44:42,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:44:42,982 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-10-04 12:44:42,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2018-10-04 12:44:42,983 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 79 [2018-10-04 12:44:42,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:44:42,983 INFO L225 Difference]: With dead ends: 83 [2018-10-04 12:44:42,983 INFO L226 Difference]: Without dead ends: 81 [2018-10-04 12:44:42,984 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.4s impTime 17 [2018-10-04 12:44:42,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-04 12:44:42,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-04 12:44:42,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-04 12:44:42,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2018-10-04 12:44:42,986 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2018-10-04 12:44:42,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:44:42,986 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2018-10-04 12:44:42,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-10-04 12:44:42,986 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2018-10-04 12:44:42,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2018-10-04 12:44:42,987 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:44:42,987 INFO L375 BasicCegarLoop]: trace histogram [77, 1, 1, 1] [2018-10-04 12:44:42,987 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:44:42,987 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:44:42,987 INFO L82 PathProgramCache]: Analyzing trace with hash -232714324, now seen corresponding path program 77 times [2018-10-04 12:44:42,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:44:42,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:44:42,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:42,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:44:42,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:43,403 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:44:43,670 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:43,981 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:44,950 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:44:45,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:45,571 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:44:45,571 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:44:45,578 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:44:45,762 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-04 12:44:45,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:44:45,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:44:45,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:45,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:44:45,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-04 12:44:45,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 12:44:45,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 12:44:45,962 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:44:45,962 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 80 states. [2018-10-04 12:44:46,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:44:46,135 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2018-10-04 12:44:46,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-04 12:44:46,136 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 80 [2018-10-04 12:44:46,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:44:46,136 INFO L225 Difference]: With dead ends: 84 [2018-10-04 12:44:46,136 INFO L226 Difference]: Without dead ends: 82 [2018-10-04 12:44:46,136 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.2s impTime 18 [2018-10-04 12:44:46,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-10-04 12:44:46,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-10-04 12:44:46,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-10-04 12:44:46,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2018-10-04 12:44:46,138 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2018-10-04 12:44:46,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:44:46,138 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2018-10-04 12:44:46,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 12:44:46,139 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2018-10-04 12:44:46,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2018-10-04 12:44:46,139 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:44:46,139 INFO L375 BasicCegarLoop]: trace histogram [78, 1, 1, 1] [2018-10-04 12:44:46,140 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:44:46,140 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:44:46,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1375792355, now seen corresponding path program 78 times [2018-10-04 12:44:46,140 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:44:46,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:44:46,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:46,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:44:46,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:46,415 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:44:46,822 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:47,402 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:47,957 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:44:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:48,258 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:44:48,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:44:48,266 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:44:48,466 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-04 12:44:48,467 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:44:48,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:44:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:48,997 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:44:48,997 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2018-10-04 12:44:48,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-10-04 12:44:48,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-10-04 12:44:48,998 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:44:48,999 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 81 states. [2018-10-04 12:44:49,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:44:49,160 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2018-10-04 12:44:49,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 12:44:49,160 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 81 [2018-10-04 12:44:49,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:44:49,161 INFO L225 Difference]: With dead ends: 85 [2018-10-04 12:44:49,161 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 12:44:49,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 1.8s impTime 19 [2018-10-04 12:44:49,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 12:44:49,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-10-04 12:44:49,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-04 12:44:49,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-10-04 12:44:49,163 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2018-10-04 12:44:49,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:44:49,163 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-10-04 12:44:49,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-10-04 12:44:49,163 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-10-04 12:44:49,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-04 12:44:49,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:44:49,164 INFO L375 BasicCegarLoop]: trace histogram [79, 1, 1, 1] [2018-10-04 12:44:49,164 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:44:49,164 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:44:49,164 INFO L82 PathProgramCache]: Analyzing trace with hash -300108148, now seen corresponding path program 79 times [2018-10-04 12:44:49,165 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:44:49,165 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:44:49,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:49,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:44:49,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:49,417 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:44:49,636 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:50,011 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:50,733 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:44:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:51,336 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:44:51,336 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:44:51,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:44:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:51,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:44:51,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:51,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:44:51,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-04 12:44:51,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-04 12:44:51,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-04 12:44:51,651 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:44:51,651 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 82 states. [2018-10-04 12:44:51,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:44:51,816 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2018-10-04 12:44:51,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-04 12:44:51,816 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 82 [2018-10-04 12:44:51,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:44:51,817 INFO L225 Difference]: With dead ends: 86 [2018-10-04 12:44:51,817 INFO L226 Difference]: Without dead ends: 84 [2018-10-04 12:44:51,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.8s impTime 20 [2018-10-04 12:44:51,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-04 12:44:51,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2018-10-04 12:44:51,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 12:44:51,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2018-10-04 12:44:51,819 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2018-10-04 12:44:51,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:44:51,820 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2018-10-04 12:44:51,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-04 12:44:51,820 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2018-10-04 12:44:51,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 12:44:51,820 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:44:51,820 INFO L375 BasicCegarLoop]: trace histogram [80, 1, 1, 1] [2018-10-04 12:44:51,821 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:44:51,821 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:44:51,821 INFO L82 PathProgramCache]: Analyzing trace with hash -713416189, now seen corresponding path program 80 times [2018-10-04 12:44:51,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:44:51,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:44:51,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:51,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:44:51,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:51,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:52,091 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:44:52,343 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:52,661 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:53,872 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:44:54,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:54,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:44:54,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:44:54,709 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:44:54,816 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:44:54,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:44:54,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:44:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:55,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:44:55,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2018-10-04 12:44:55,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 12:44:55,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 12:44:55,490 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:44:55,490 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 83 states. [2018-10-04 12:44:55,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:44:55,712 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2018-10-04 12:44:55,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 12:44:55,712 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 83 [2018-10-04 12:44:55,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:44:55,713 INFO L225 Difference]: With dead ends: 87 [2018-10-04 12:44:55,713 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 12:44:55,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.5s impTime 21 [2018-10-04 12:44:55,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 12:44:55,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 12:44:55,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 12:44:55,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2018-10-04 12:44:55,715 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2018-10-04 12:44:55,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:44:55,715 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2018-10-04 12:44:55,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 12:44:55,715 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2018-10-04 12:44:55,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 12:44:55,715 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:44:55,715 INFO L375 BasicCegarLoop]: trace histogram [81, 1, 1, 1] [2018-10-04 12:44:55,716 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:44:55,716 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:44:55,716 INFO L82 PathProgramCache]: Analyzing trace with hash -641063572, now seen corresponding path program 81 times [2018-10-04 12:44:55,716 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:44:55,716 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:44:55,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:55,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:44:55,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:55,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:56,007 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:44:56,270 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:56,497 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:57,346 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:44:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:57,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:44:57,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:44:57,921 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:44:58,124 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-04 12:44:58,125 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:44:58,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:44:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:44:58,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:44:58,348 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-04 12:44:58,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-04 12:44:58,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-04 12:44:58,349 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:44:58,349 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 84 states. [2018-10-04 12:44:58,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:44:58,527 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-10-04 12:44:58,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-04 12:44:58,528 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 84 [2018-10-04 12:44:58,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:44:58,528 INFO L225 Difference]: With dead ends: 88 [2018-10-04 12:44:58,528 INFO L226 Difference]: Without dead ends: 86 [2018-10-04 12:44:58,528 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.5s impTime 22 [2018-10-04 12:44:58,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-04 12:44:58,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-04 12:44:58,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-04 12:44:58,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2018-10-04 12:44:58,530 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2018-10-04 12:44:58,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:44:58,530 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2018-10-04 12:44:58,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-04 12:44:58,531 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2018-10-04 12:44:58,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-10-04 12:44:58,531 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:44:58,531 INFO L375 BasicCegarLoop]: trace histogram [82, 1, 1, 1] [2018-10-04 12:44:58,531 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:44:58,531 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:44:58,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1601867555, now seen corresponding path program 82 times [2018-10-04 12:44:58,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:44:58,532 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:44:58,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:58,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:44:58,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:44:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:44:58,855 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:44:59,026 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:44:59,414 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:00,357 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:01,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:01,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:45:01,338 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:45:01,348 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:45:01,462 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:45:01,462 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:45:01,470 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:45:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:01,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:45:01,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2018-10-04 12:45:01,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-10-04 12:45:01,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-10-04 12:45:01,675 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:45:01,675 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 85 states. [2018-10-04 12:45:02,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:45:02,080 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2018-10-04 12:45:02,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-10-04 12:45:02,081 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 85 [2018-10-04 12:45:02,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:45:02,081 INFO L225 Difference]: With dead ends: 89 [2018-10-04 12:45:02,081 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 12:45:02,081 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.4s impTime 23 [2018-10-04 12:45:02,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 12:45:02,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2018-10-04 12:45:02,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 12:45:02,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2018-10-04 12:45:02,083 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2018-10-04 12:45:02,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:45:02,083 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2018-10-04 12:45:02,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-10-04 12:45:02,084 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2018-10-04 12:45:02,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 12:45:02,086 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:45:02,086 INFO L375 BasicCegarLoop]: trace histogram [83, 1, 1, 1] [2018-10-04 12:45:02,086 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:45:02,087 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:45:02,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1881711540, now seen corresponding path program 83 times [2018-10-04 12:45:02,087 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:45:02,087 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:45:02,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:02,088 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:45:02,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:45:02,342 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:45:02,732 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:03,300 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:04,480 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:05,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:45:05,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:45:05,528 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:45:05,739 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-04 12:45:05,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:45:05,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:45:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:06,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:45:06,590 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-04 12:45:06,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-04 12:45:06,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-04 12:45:06,591 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:45:06,591 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 86 states. [2018-10-04 12:45:06,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:45:06,783 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2018-10-04 12:45:06,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-04 12:45:06,783 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 86 [2018-10-04 12:45:06,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:45:06,784 INFO L225 Difference]: With dead ends: 90 [2018-10-04 12:45:06,784 INFO L226 Difference]: Without dead ends: 88 [2018-10-04 12:45:06,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s Time 3.1s impTime 24 [2018-10-04 12:45:06,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-10-04 12:45:06,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-10-04 12:45:06,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-10-04 12:45:06,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-10-04 12:45:06,786 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2018-10-04 12:45:06,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:45:06,786 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-10-04 12:45:06,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-04 12:45:06,786 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-10-04 12:45:06,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-04 12:45:06,786 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:45:06,786 INFO L375 BasicCegarLoop]: trace histogram [84, 1, 1, 1] [2018-10-04 12:45:06,787 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:45:06,787 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:45:06,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1796486211, now seen corresponding path program 84 times [2018-10-04 12:45:06,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:45:06,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:45:06,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:06,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:45:06,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:45:07,011 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:45:07,400 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:07,572 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:08,017 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:08,871 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:08,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:08,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:45:08,878 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:45:08,886 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:45:09,098 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-04 12:45:09,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:45:09,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:45:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:09,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:45:09,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2018-10-04 12:45:09,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2018-10-04 12:45:09,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2018-10-04 12:45:09,315 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:45:09,315 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 87 states. [2018-10-04 12:45:09,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:45:09,489 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2018-10-04 12:45:09,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2018-10-04 12:45:09,489 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 87 [2018-10-04 12:45:09,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:45:09,490 INFO L225 Difference]: With dead ends: 91 [2018-10-04 12:45:09,490 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 12:45:09,490 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.6s impTime 8 [2018-10-04 12:45:09,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 12:45:09,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2018-10-04 12:45:09,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-10-04 12:45:09,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2018-10-04 12:45:09,495 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2018-10-04 12:45:09,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:45:09,496 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2018-10-04 12:45:09,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has 87 states. [2018-10-04 12:45:09,496 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2018-10-04 12:45:09,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-04 12:45:09,496 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:45:09,496 INFO L375 BasicCegarLoop]: trace histogram [85, 1, 1, 1] [2018-10-04 12:45:09,497 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:45:09,498 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:45:09,498 INFO L82 PathProgramCache]: Analyzing trace with hash -143500500, now seen corresponding path program 85 times [2018-10-04 12:45:09,498 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:45:09,499 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:45:09,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:09,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:45:09,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:45:09,871 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:45:10,273 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:10,849 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:11,480 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:11,785 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:11,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:45:11,818 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:45:11,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:45:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:45:11,947 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:45:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:12,152 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:45:12,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-04 12:45:12,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-04 12:45:12,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-04 12:45:12,154 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:45:12,154 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 88 states. [2018-10-04 12:45:12,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:45:12,297 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2018-10-04 12:45:12,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-04 12:45:12,298 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 88 [2018-10-04 12:45:12,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:45:12,298 INFO L225 Difference]: With dead ends: 92 [2018-10-04 12:45:12,298 INFO L226 Difference]: Without dead ends: 90 [2018-10-04 12:45:12,299 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.8s impTime 9 [2018-10-04 12:45:12,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-10-04 12:45:12,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2018-10-04 12:45:12,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-04 12:45:12,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2018-10-04 12:45:12,301 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2018-10-04 12:45:12,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:45:12,301 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2018-10-04 12:45:12,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-04 12:45:12,301 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2018-10-04 12:45:12,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2018-10-04 12:45:12,302 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:45:12,302 INFO L375 BasicCegarLoop]: trace histogram [86, 1, 1, 1] [2018-10-04 12:45:12,302 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:45:12,302 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:45:12,302 INFO L82 PathProgramCache]: Analyzing trace with hash -153546397, now seen corresponding path program 86 times [2018-10-04 12:45:12,303 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:45:12,303 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:45:12,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:12,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:45:12,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:45:12,516 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:45:12,772 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:13,249 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:14,437 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:15,031 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:15,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:45:15,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:45:15,069 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:45:15,187 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:45:15,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:45:15,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:45:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:15,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:45:15,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2018-10-04 12:45:15,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2018-10-04 12:45:15,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2018-10-04 12:45:15,428 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:45:15,428 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 89 states. [2018-10-04 12:45:15,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:45:15,574 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-10-04 12:45:15,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-10-04 12:45:15,575 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 89 [2018-10-04 12:45:15,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:45:15,575 INFO L225 Difference]: With dead ends: 93 [2018-10-04 12:45:15,575 INFO L226 Difference]: Without dead ends: 91 [2018-10-04 12:45:15,576 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.3s impTime 10 [2018-10-04 12:45:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-04 12:45:15,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-04 12:45:15,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 12:45:15,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2018-10-04 12:45:15,578 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2018-10-04 12:45:15,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:45:15,578 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2018-10-04 12:45:15,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has 89 states. [2018-10-04 12:45:15,578 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2018-10-04 12:45:15,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 12:45:15,579 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:45:15,579 INFO L375 BasicCegarLoop]: trace histogram [87, 1, 1, 1] [2018-10-04 12:45:15,579 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:45:15,579 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:45:15,579 INFO L82 PathProgramCache]: Analyzing trace with hash -464969204, now seen corresponding path program 87 times [2018-10-04 12:45:15,580 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:45:15,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:45:15,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:15,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:45:15,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:45:15,830 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:45:16,028 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:16,455 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:17,398 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:18,289 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:18,321 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:45:18,321 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:45:18,331 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:45:18,561 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-04 12:45:18,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:45:18,568 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:45:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:18,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:45:18,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-04 12:45:18,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-04 12:45:18,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-04 12:45:18,778 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:45:18,779 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 90 states. [2018-10-04 12:45:18,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:45:18,949 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2018-10-04 12:45:18,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-04 12:45:18,950 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 90 [2018-10-04 12:45:18,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:45:18,951 INFO L225 Difference]: With dead ends: 94 [2018-10-04 12:45:18,951 INFO L226 Difference]: Without dead ends: 92 [2018-10-04 12:45:18,951 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.3s impTime 11 [2018-10-04 12:45:18,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2018-10-04 12:45:18,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2018-10-04 12:45:18,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-04 12:45:18,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2018-10-04 12:45:18,954 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2018-10-04 12:45:18,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:45:18,955 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2018-10-04 12:45:18,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-04 12:45:18,955 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2018-10-04 12:45:18,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-10-04 12:45:18,955 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:45:18,955 INFO L375 BasicCegarLoop]: trace histogram [88, 1, 1, 1] [2018-10-04 12:45:18,956 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:45:18,956 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:45:18,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1529141629, now seen corresponding path program 88 times [2018-10-04 12:45:18,956 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:45:18,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:45:18,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:18,957 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:45:18,957 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:45:19,268 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:45:19,536 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:19,998 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:20,964 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:21,554 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:21,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:45:21,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:45:21,617 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:45:21,737 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:45:21,737 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:45:21,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:45:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:21,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:45:21,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2018-10-04 12:45:21,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-04 12:45:21,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-04 12:45:21,962 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:45:21,962 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 91 states. [2018-10-04 12:45:22,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:45:22,122 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2018-10-04 12:45:22,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 12:45:22,123 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 91 [2018-10-04 12:45:22,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:45:22,123 INFO L225 Difference]: With dead ends: 95 [2018-10-04 12:45:22,123 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 12:45:22,123 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.2s impTime 12 [2018-10-04 12:45:22,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 12:45:22,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 12:45:22,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 12:45:22,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-10-04 12:45:22,125 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2018-10-04 12:45:22,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:45:22,125 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-10-04 12:45:22,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-04 12:45:22,126 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-10-04 12:45:22,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 12:45:22,126 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:45:22,126 INFO L375 BasicCegarLoop]: trace histogram [89, 1, 1, 1] [2018-10-04 12:45:22,126 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:45:22,126 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:45:22,126 INFO L82 PathProgramCache]: Analyzing trace with hash -158748436, now seen corresponding path program 89 times [2018-10-04 12:45:22,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:45:22,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:45:22,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:22,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:45:22,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:45:22,404 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:45:22,807 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:23,383 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:24,252 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:24,566 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:24,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:45:24,700 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:45:24,707 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:45:24,933 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-04 12:45:24,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:45:24,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:45:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:25,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:45:25,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-04 12:45:25,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-04 12:45:25,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-04 12:45:25,158 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:45:25,158 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 92 states. [2018-10-04 12:45:25,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:45:25,316 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2018-10-04 12:45:25,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-04 12:45:25,316 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 92 [2018-10-04 12:45:25,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:45:25,317 INFO L225 Difference]: With dead ends: 96 [2018-10-04 12:45:25,317 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 12:45:25,317 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.0s impTime 13 [2018-10-04 12:45:25,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 12:45:25,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2018-10-04 12:45:25,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 12:45:25,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2018-10-04 12:45:25,319 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2018-10-04 12:45:25,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:45:25,319 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2018-10-04 12:45:25,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-04 12:45:25,320 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2018-10-04 12:45:25,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 12:45:25,320 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:45:25,320 INFO L375 BasicCegarLoop]: trace histogram [90, 1, 1, 1] [2018-10-04 12:45:25,320 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:45:25,320 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:45:25,321 INFO L82 PathProgramCache]: Analyzing trace with hash -626232413, now seen corresponding path program 90 times [2018-10-04 12:45:25,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:45:25,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:45:25,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:25,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:45:25,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:45:25,551 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:45:25,941 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:26,118 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:26,540 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:27,197 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:27,484 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:45:27,484 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:45:27,492 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:45:27,730 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-04 12:45:27,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:45:27,740 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:45:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:27,981 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:45:27,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2018-10-04 12:45:27,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-10-04 12:45:27,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-10-04 12:45:27,982 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:45:27,982 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 93 states. [2018-10-04 12:45:28,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:45:28,148 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2018-10-04 12:45:28,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-04 12:45:28,148 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 93 [2018-10-04 12:45:28,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:45:28,149 INFO L225 Difference]: With dead ends: 97 [2018-10-04 12:45:28,149 INFO L226 Difference]: Without dead ends: 95 [2018-10-04 12:45:28,149 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.7s impTime 14 [2018-10-04 12:45:28,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2018-10-04 12:45:28,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2018-10-04 12:45:28,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-04 12:45:28,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2018-10-04 12:45:28,152 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2018-10-04 12:45:28,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:45:28,152 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2018-10-04 12:45:28,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-10-04 12:45:28,152 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2018-10-04 12:45:28,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2018-10-04 12:45:28,153 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:45:28,153 INFO L375 BasicCegarLoop]: trace histogram [91, 1, 1, 1] [2018-10-04 12:45:28,153 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:45:28,153 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:45:28,153 INFO L82 PathProgramCache]: Analyzing trace with hash 2061633484, now seen corresponding path program 91 times [2018-10-04 12:45:28,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:45:28,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:45:28,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:28,154 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:45:28,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:45:28,426 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:45:28,817 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:29,651 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:30,582 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:31,733 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:32,291 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:45:32,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:45:32,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:45:32,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:45:32,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:45:32,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:32,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:45:32,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-04 12:45:32,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-04 12:45:32,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-04 12:45:32,646 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:45:32,647 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 94 states. [2018-10-04 12:45:32,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:45:32,895 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-10-04 12:45:32,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-04 12:45:32,896 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 94 [2018-10-04 12:45:32,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:45:32,896 INFO L225 Difference]: With dead ends: 98 [2018-10-04 12:45:32,896 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 12:45:32,897 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s Time 3.7s impTime 15 [2018-10-04 12:45:32,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 12:45:32,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-04 12:45:32,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-04 12:45:32,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2018-10-04 12:45:32,899 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2018-10-04 12:45:32,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:45:32,899 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2018-10-04 12:45:32,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-04 12:45:32,900 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2018-10-04 12:45:32,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2018-10-04 12:45:32,900 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:45:32,900 INFO L375 BasicCegarLoop]: trace histogram [92, 1, 1, 1] [2018-10-04 12:45:32,900 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:45:32,901 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:45:32,901 INFO L82 PathProgramCache]: Analyzing trace with hash -513869629, now seen corresponding path program 92 times [2018-10-04 12:45:32,901 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:45:32,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:45:32,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:32,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:45:32,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:45:33,190 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:45:33,353 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:33,739 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:34,968 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:36,049 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:36,112 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:45:36,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:45:36,119 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:45:36,245 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:45:36,245 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:45:36,253 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:45:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:36,542 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:45:36,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2018-10-04 12:45:36,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2018-10-04 12:45:36,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2018-10-04 12:45:36,543 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:45:36,544 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 95 states. [2018-10-04 12:45:36,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:45:36,713 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2018-10-04 12:45:36,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-04 12:45:36,714 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 95 [2018-10-04 12:45:36,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:45:36,714 INFO L225 Difference]: With dead ends: 99 [2018-10-04 12:45:36,714 INFO L226 Difference]: Without dead ends: 97 [2018-10-04 12:45:36,715 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.7s impTime 16 [2018-10-04 12:45:36,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-10-04 12:45:36,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2018-10-04 12:45:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2018-10-04 12:45:36,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2018-10-04 12:45:36,717 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2018-10-04 12:45:36,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:45:36,717 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2018-10-04 12:45:36,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 95 states. [2018-10-04 12:45:36,717 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2018-10-04 12:45:36,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-10-04 12:45:36,717 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:45:36,717 INFO L375 BasicCegarLoop]: trace histogram [93, 1, 1, 1] [2018-10-04 12:45:36,718 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:45:36,718 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:45:36,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1249912492, now seen corresponding path program 93 times [2018-10-04 12:45:36,718 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:45:36,718 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:45:36,718 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:36,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:45:36,719 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:45:37,006 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:45:37,280 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:37,507 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:38,029 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:38,779 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:39,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:39,287 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:45:39,287 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:45:39,293 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:45:39,552 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-04 12:45:39,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:45:39,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:45:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:39,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:45:39,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-04 12:45:39,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-04 12:45:39,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-04 12:45:39,800 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:45:39,800 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 96 states. [2018-10-04 12:45:40,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:45:40,019 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2018-10-04 12:45:40,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-04 12:45:40,020 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 96 [2018-10-04 12:45:40,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:45:40,020 INFO L225 Difference]: With dead ends: 100 [2018-10-04 12:45:40,020 INFO L226 Difference]: Without dead ends: 98 [2018-10-04 12:45:40,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.1s impTime 17 [2018-10-04 12:45:40,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-10-04 12:45:40,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-10-04 12:45:40,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-10-04 12:45:40,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-10-04 12:45:40,023 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2018-10-04 12:45:40,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:45:40,023 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-10-04 12:45:40,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-04 12:45:40,023 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-10-04 12:45:40,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-04 12:45:40,024 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:45:40,024 INFO L375 BasicCegarLoop]: trace histogram [94, 1, 1, 1] [2018-10-04 12:45:40,024 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:45:40,024 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:45:40,025 INFO L82 PathProgramCache]: Analyzing trace with hash 92583395, now seen corresponding path program 94 times [2018-10-04 12:45:40,025 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:45:40,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:45:40,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:40,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:45:40,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:45:40,304 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:45:40,548 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:40,856 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:41,796 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:42,971 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:43,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:45:43,558 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:45:43,565 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:45:43,694 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:45:43,694 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:45:43,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:45:43,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:43,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:45:43,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2018-10-04 12:45:43,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-10-04 12:45:43,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-10-04 12:45:43,977 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:45:43,977 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 97 states. [2018-10-04 12:45:44,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:45:44,166 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2018-10-04 12:45:44,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2018-10-04 12:45:44,166 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 97 [2018-10-04 12:45:44,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:45:44,167 INFO L225 Difference]: With dead ends: 101 [2018-10-04 12:45:44,167 INFO L226 Difference]: Without dead ends: 99 [2018-10-04 12:45:44,167 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s Time 3.1s impTime 18 [2018-10-04 12:45:44,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-04 12:45:44,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2018-10-04 12:45:44,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-10-04 12:45:44,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2018-10-04 12:45:44,169 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2018-10-04 12:45:44,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:45:44,169 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2018-10-04 12:45:44,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-10-04 12:45:44,169 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2018-10-04 12:45:44,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-04 12:45:44,170 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:45:44,170 INFO L375 BasicCegarLoop]: trace histogram [95, 1, 1, 1] [2018-10-04 12:45:44,170 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:45:44,171 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:45:44,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1424880244, now seen corresponding path program 95 times [2018-10-04 12:45:44,171 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:45:44,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:45:44,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:44,172 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:45:44,172 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:45:44,562 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:45:44,806 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:45,177 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:45,872 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:46,787 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:47,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:45:47,500 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:45:47,509 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:45:47,787 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-04 12:45:47,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:45:47,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:45:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:48,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:45:48,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-04 12:45:48,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-04 12:45:48,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-04 12:45:48,025 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:45:48,026 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 98 states. [2018-10-04 12:45:48,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:45:48,252 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2018-10-04 12:45:48,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-04 12:45:48,253 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 98 [2018-10-04 12:45:48,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:45:48,253 INFO L225 Difference]: With dead ends: 102 [2018-10-04 12:45:48,253 INFO L226 Difference]: Without dead ends: 100 [2018-10-04 12:45:48,254 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.9s impTime 19 [2018-10-04 12:45:48,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2018-10-04 12:45:48,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2018-10-04 12:45:48,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-04 12:45:48,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2018-10-04 12:45:48,256 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2018-10-04 12:45:48,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:45:48,257 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2018-10-04 12:45:48,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-04 12:45:48,257 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2018-10-04 12:45:48,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-10-04 12:45:48,257 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:45:48,258 INFO L375 BasicCegarLoop]: trace histogram [96, 1, 1, 1] [2018-10-04 12:45:48,258 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:45:48,258 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:45:48,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1221612797, now seen corresponding path program 96 times [2018-10-04 12:45:48,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:45:48,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:45:48,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:48,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:45:48,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:45:48,545 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:45:48,948 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:49,637 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:50,375 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:50,694 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:51,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:45:51,039 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:45:51,048 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:45:51,307 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-04 12:45:51,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:45:51,316 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:45:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:51,567 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:45:51,567 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2018-10-04 12:45:51,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2018-10-04 12:45:51,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2018-10-04 12:45:51,569 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:45:51,569 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 99 states. [2018-10-04 12:45:51,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:45:51,735 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-10-04 12:45:51,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-04 12:45:51,735 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 99 [2018-10-04 12:45:51,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:45:51,736 INFO L225 Difference]: With dead ends: 103 [2018-10-04 12:45:51,736 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 12:45:51,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.3s impTime 20 [2018-10-04 12:45:51,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 12:45:51,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 12:45:51,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 12:45:51,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2018-10-04 12:45:51,740 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2018-10-04 12:45:51,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:45:51,740 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2018-10-04 12:45:51,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 99 states. [2018-10-04 12:45:51,740 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2018-10-04 12:45:51,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 12:45:51,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:45:51,741 INFO L375 BasicCegarLoop]: trace histogram [97, 1, 1, 1] [2018-10-04 12:45:51,741 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:45:51,741 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:45:51,741 INFO L82 PathProgramCache]: Analyzing trace with hash 784710764, now seen corresponding path program 97 times [2018-10-04 12:45:51,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:45:51,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:45:51,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:51,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:45:51,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:45:52,056 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:45:52,319 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:52,619 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:53,592 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:54,956 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:55,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:45:55,632 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:45:55,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:45:55,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:45:55,780 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:45:55,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:45:56,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:45:56,010 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-04 12:45:56,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-04 12:45:56,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-04 12:45:56,011 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:45:56,011 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 100 states. [2018-10-04 12:45:56,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:45:56,215 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2018-10-04 12:45:56,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-04 12:45:56,216 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 100 [2018-10-04 12:45:56,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:45:56,217 INFO L225 Difference]: With dead ends: 104 [2018-10-04 12:45:56,217 INFO L226 Difference]: Without dead ends: 102 [2018-10-04 12:45:56,217 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s Time 3.4s impTime 21 [2018-10-04 12:45:56,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-04 12:45:56,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-10-04 12:45:56,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-10-04 12:45:56,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2018-10-04 12:45:56,220 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2018-10-04 12:45:56,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:45:56,221 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2018-10-04 12:45:56,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-04 12:45:56,221 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2018-10-04 12:45:56,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2018-10-04 12:45:56,221 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:45:56,221 INFO L375 BasicCegarLoop]: trace histogram [98, 1, 1, 1] [2018-10-04 12:45:56,221 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:45:56,221 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:45:56,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1443768285, now seen corresponding path program 98 times [2018-10-04 12:45:56,222 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:45:56,222 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:45:56,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:56,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:45:56,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:45:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:45:56,533 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:45:56,888 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:57,466 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:45:58,429 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:45:59,595 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:46:00,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:00,944 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:00,944 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:00,950 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:46:01,083 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:46:01,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:01,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:01,326 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:01,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2018-10-04 12:46:01,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2018-10-04 12:46:01,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2018-10-04 12:46:01,327 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:01,327 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2018-10-04 12:46:01,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:01,618 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2018-10-04 12:46:01,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2018-10-04 12:46:01,618 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2018-10-04 12:46:01,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:01,619 INFO L225 Difference]: With dead ends: 105 [2018-10-04 12:46:01,619 INFO L226 Difference]: Without dead ends: 103 [2018-10-04 12:46:01,619 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s Time 4.2s impTime 22 [2018-10-04 12:46:01,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-10-04 12:46:01,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-10-04 12:46:01,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-04 12:46:01,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-10-04 12:46:01,621 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2018-10-04 12:46:01,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:01,621 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-10-04 12:46:01,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has 101 states. [2018-10-04 12:46:01,621 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-10-04 12:46:01,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-04 12:46:01,622 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:01,622 INFO L375 BasicCegarLoop]: trace histogram [99, 1, 1, 1] [2018-10-04 12:46:01,622 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:01,622 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:01,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1807142068, now seen corresponding path program 99 times [2018-10-04 12:46:01,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:01,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:01,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:01,623 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:01,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:01,919 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:46:02,310 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:46:02,900 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:46:03,840 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:46:05,240 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:46:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:06,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:06,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:06,455 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:46:06,738 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-04 12:46:06,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:06,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:06,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:06,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-04 12:46:06,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-04 12:46:06,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-04 12:46:06,989 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:06,989 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 102 states. [2018-10-04 12:46:07,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:07,285 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2018-10-04 12:46:07,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-04 12:46:07,285 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 102 [2018-10-04 12:46:07,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:07,286 INFO L225 Difference]: With dead ends: 106 [2018-10-04 12:46:07,286 INFO L226 Difference]: Without dead ends: 104 [2018-10-04 12:46:07,286 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s Time 4.3s impTime 23 [2018-10-04 12:46:07,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-04 12:46:07,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2018-10-04 12:46:07,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-10-04 12:46:07,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2018-10-04 12:46:07,289 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2018-10-04 12:46:07,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:07,290 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2018-10-04 12:46:07,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-04 12:46:07,290 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2018-10-04 12:46:07,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-04 12:46:07,290 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:07,291 INFO L375 BasicCegarLoop]: trace histogram [100, 1, 1, 1] [2018-10-04 12:46:07,291 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:07,291 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:07,291 INFO L82 PathProgramCache]: Analyzing trace with hash -186827453, now seen corresponding path program 100 times [2018-10-04 12:46:07,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:07,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:07,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:07,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:07,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:07,552 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:46:07,905 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:46:08,437 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:46:09,341 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:46:10,708 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:46:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:11,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:11,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:11,948 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:46:12,088 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:46:12,088 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:12,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:12,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:12,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2018-10-04 12:46:12,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-04 12:46:12,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-04 12:46:12,352 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:12,352 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 103 states. [2018-10-04 12:46:12,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:12,650 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2018-10-04 12:46:12,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-04 12:46:12,650 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 103 [2018-10-04 12:46:12,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:12,651 INFO L225 Difference]: With dead ends: 107 [2018-10-04 12:46:12,651 INFO L226 Difference]: Without dead ends: 105 [2018-10-04 12:46:12,651 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s Time 4.2s impTime 24 [2018-10-04 12:46:12,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-04 12:46:12,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2018-10-04 12:46:12,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 12:46:12,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2018-10-04 12:46:12,660 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2018-10-04 12:46:12,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:12,661 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2018-10-04 12:46:12,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-04 12:46:12,661 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2018-10-04 12:46:12,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 12:46:12,662 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:12,663 INFO L375 BasicCegarLoop]: trace histogram [101, 1, 1, 1] [2018-10-04 12:46:12,663 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:12,663 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:12,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1496681940, now seen corresponding path program 101 times [2018-10-04 12:46:12,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:12,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:12,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:12,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:12,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:12,981 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:46:13,384 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:46:13,964 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:46:14,907 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:46:16,318 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:46:17,731 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:46:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:17,745 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:17,745 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:17,752 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:46:18,033 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-10-04 12:46:18,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:18,049 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:18,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:18,299 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:18,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-04 12:46:18,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-04 12:46:18,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-04 12:46:18,301 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:18,301 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 104 states. [2018-10-04 12:46:18,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:18,611 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-10-04 12:46:18,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-04 12:46:18,611 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 104 [2018-10-04 12:46:18,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:18,612 INFO L225 Difference]: With dead ends: 108 [2018-10-04 12:46:18,612 INFO L226 Difference]: Without dead ends: 106 [2018-10-04 12:46:18,612 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s Time 4.5s impTime 8 [2018-10-04 12:46:18,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-04 12:46:18,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-04 12:46:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-04 12:46:18,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2018-10-04 12:46:18,615 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2018-10-04 12:46:18,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:18,615 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2018-10-04 12:46:18,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-04 12:46:18,616 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2018-10-04 12:46:18,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2018-10-04 12:46:18,616 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:18,616 INFO L375 BasicCegarLoop]: trace histogram [102, 1, 1, 1] [2018-10-04 12:46:18,616 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:18,617 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:18,617 INFO L82 PathProgramCache]: Analyzing trace with hash 847501923, now seen corresponding path program 102 times [2018-10-04 12:46:18,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:18,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:18,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:18,618 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:18,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:18,921 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:46:19,289 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:46:19,764 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:46:20,993 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:46:22,144 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:46:23,592 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:46:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:23,693 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:23,693 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:23,700 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:46:23,982 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-10-04 12:46:23,983 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:23,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:24,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5253 backedges. 0 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:24,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:24,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 104 [2018-10-04 12:46:24,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-10-04 12:46:24,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-10-04 12:46:24,294 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:24,294 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 105 states. [2018-10-04 12:46:24,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:24,593 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2018-10-04 12:46:24,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2018-10-04 12:46:24,593 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 105 [2018-10-04 12:46:24,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:24,594 INFO L225 Difference]: With dead ends: 109 [2018-10-04 12:46:24,594 INFO L226 Difference]: Without dead ends: 107 [2018-10-04 12:46:24,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s Time 4.5s impTime 9 [2018-10-04 12:46:24,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2018-10-04 12:46:24,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2018-10-04 12:46:24,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-10-04 12:46:24,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2018-10-04 12:46:24,596 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2018-10-04 12:46:24,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:24,597 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2018-10-04 12:46:24,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-10-04 12:46:24,597 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2018-10-04 12:46:24,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2018-10-04 12:46:24,597 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:24,597 INFO L375 BasicCegarLoop]: trace histogram [103, 1, 1, 1] [2018-10-04 12:46:24,598 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:24,598 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:24,598 INFO L82 PathProgramCache]: Analyzing trace with hash 502757644, now seen corresponding path program 103 times [2018-10-04 12:46:24,598 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:24,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:24,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:24,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:24,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:24,905 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:46:25,091 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:46:25,802 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:46:26,752 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:46:27,653 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:46:27,956 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:46:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:28,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:28,015 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:28,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:28,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:28,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:28,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-04 12:46:28,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-04 12:46:28,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-04 12:46:28,604 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:28,605 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 106 states. [2018-10-04 12:46:28,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:28,817 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2018-10-04 12:46:28,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-04 12:46:28,817 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 106 [2018-10-04 12:46:28,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:28,818 INFO L225 Difference]: With dead ends: 110 [2018-10-04 12:46:28,818 INFO L226 Difference]: Without dead ends: 108 [2018-10-04 12:46:28,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s Time 2.8s impTime 10 [2018-10-04 12:46:28,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-10-04 12:46:28,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-10-04 12:46:28,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 12:46:28,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-10-04 12:46:28,820 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2018-10-04 12:46:28,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:28,820 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-10-04 12:46:28,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-04 12:46:28,820 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-10-04 12:46:28,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 12:46:28,821 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:28,821 INFO L375 BasicCegarLoop]: trace histogram [104, 1, 1, 1] [2018-10-04 12:46:28,821 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:28,821 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:28,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1594380413, now seen corresponding path program 104 times [2018-10-04 12:46:28,821 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:28,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:28,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:28,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:46:28,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:28,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:29,054 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:46:29,450 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:46:29,841 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:46:30,166 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:46:30,988 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:46:31,874 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:46:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:32,053 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:32,053 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:46:32,060 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:46:32,213 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:46:32,213 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:32,223 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 0 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:32,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:32,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 106 [2018-10-04 12:46:32,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2018-10-04 12:46:32,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2018-10-04 12:46:32,507 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:32,507 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 107 states. [2018-10-04 12:46:32,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:46:32,733 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2018-10-04 12:46:32,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-04 12:46:32,734 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 107 [2018-10-04 12:46:32,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:46:32,734 INFO L225 Difference]: With dead ends: 111 [2018-10-04 12:46:32,734 INFO L226 Difference]: Without dead ends: 109 [2018-10-04 12:46:32,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s Time 2.7s impTime 11 [2018-10-04 12:46:32,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-04 12:46:32,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2018-10-04 12:46:32,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2018-10-04 12:46:32,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2018-10-04 12:46:32,737 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2018-10-04 12:46:32,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:46:32,737 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2018-10-04 12:46:32,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 107 states. [2018-10-04 12:46:32,737 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2018-10-04 12:46:32,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-04 12:46:32,738 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:46:32,738 INFO L375 BasicCegarLoop]: trace histogram [105, 1, 1, 1] [2018-10-04 12:46:32,738 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:46:32,738 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:46:32,738 INFO L82 PathProgramCache]: Analyzing trace with hash 2113816556, now seen corresponding path program 105 times [2018-10-04 12:46:32,739 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:46:32,739 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:46:32,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:32,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:46:32,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:46:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:46:33,052 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 6 [2018-10-04 12:46:33,482 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:46:34,121 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 22 new depth: 7 [2018-10-04 12:46:35,122 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:46:36,595 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:46:38,104 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 25 new depth: 8 [2018-10-04 12:46:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:38,491 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:46:38,491 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 [2018-10-04 12:46:38,499 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:46:38,827 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2018-10-04 12:46:38,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:46:38,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:46:39,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:46:39,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:46:39,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-04 12:46:39,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-04 12:46:39,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-04 12:46:39,101 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:46:39,101 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 108 states. Received shutdown request... [2018-10-04 12:46:39,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-04 12:46:39,329 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 12:46:39,334 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 12:46:39,334 INFO L202 PluginConnector]: Adding new model functions1.i_3.bplTransformedIcfg_BEv2_8.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 12:46:39 BoogieIcfgContainer [2018-10-04 12:46:39,335 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 12:46:39,335 INFO L168 Benchmark]: Toolchain (without parser) took 233836.83 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -89.7 MB). Free memory was 1.5 GB in the beginning and 1.0 GB in the end (delta: 425.8 MB). Peak memory consumption was 336.1 MB. Max. memory is 7.1 GB. [2018-10-04 12:46:39,337 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.30 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. [2018-10-04 12:46:39,337 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.21 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. [2018-10-04 12:46:39,338 INFO L168 Benchmark]: Boogie Preprocessor took 21.14 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. [2018-10-04 12:46:39,338 INFO L168 Benchmark]: RCFGBuilder took 246.30 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. [2018-10-04 12:46:39,339 INFO L168 Benchmark]: TraceAbstraction took 233525.06 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -89.7 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 404.6 MB). Peak memory consumption was 315.0 MB. Max. memory is 7.1 GB. [2018-10-04 12:46:39,342 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 0.30 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 40.21 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 Preprocessor took 21.14 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 246.30 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 233525.06 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -89.7 MB). Free memory was 1.4 GB in the beginning and 1.0 GB in the end (delta: 404.6 MB). Peak memory consumption was 315.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 42]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 42). Cancelled while BasicCegarLoop was constructing difference of abstraction (109states) and FLOYD_HOARE automaton (currently 96 states, 108 states before enhancement), while ReachableStatesComputation was computing reachable states (94 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 233.4s OverallTime, 106 OverallIterations, 105 TraceHistogramMax, 16.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 316 SDtfs, 0 SDslu, 3969 SDs, 0 SdLazy, 9733 SolverSat, 152 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11552 GetRequests, 5881 SyntacticMatches, 0 SemanticMatches, 5671 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 190.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=105, 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: 0.2s AutomataMinimizationTime, 105 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.4s SsaConstructionTime, 11.0s SatisfiabilityAnalysisTime, 199.9s InterpolantComputationTime, 11763 NumberOfCodeBlocks, 11763 NumberOfCodeBlocksAsserted, 1659 NumberOfCheckSat, 11552 ConstructedInterpolants, 0 QuantifiedInterpolants, 2461418 SizeOfPredicates, 16800 NumberOfNonLiveVariables, 57330 ConjunctsInSsa, 22470 ConjunctsInUnsatCore, 211 InterpolantComputations, 1 PerfectInterpolantSequences, 0/396970 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/functions1.i_3.bplTransformedIcfg_BEv2_8.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_12-46-39-352.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/functions1.i_3.bplTransformedIcfg_BEv2_8.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_12-46-39-352.csv Completed graceful shutdown