java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/simple4.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-1cc990c [2018-09-30 23:43:51,112 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-30 23:43:51,115 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-30 23:43:51,133 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-30 23:43:51,133 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-30 23:43:51,135 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-30 23:43:51,136 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-30 23:43:51,138 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-30 23:43:51,141 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-30 23:43:51,142 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-30 23:43:51,150 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-30 23:43:51,150 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-30 23:43:51,151 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-30 23:43:51,153 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-30 23:43:51,154 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-30 23:43:51,157 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-30 23:43:51,158 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-30 23:43:51,160 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-30 23:43:51,161 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-30 23:43:51,164 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-30 23:43:51,165 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-30 23:43:51,167 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-30 23:43:51,170 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-30 23:43:51,179 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-30 23:43:51,202 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-30 23:43:51,202 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-30 23:43:51,203 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-30 23:43:51,203 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-30 23:43:51,204 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-30 23:43:51,204 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-30 23:43:51,204 INFO L133 SettingsManager]: * Use SBE=true [2018-09-30 23:43:51,205 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-30 23:43:51,205 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-30 23:43:51,205 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-30 23:43:51,205 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-30 23:43:51,205 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-30 23:43:51,206 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-30 23:43:51,206 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-30 23:43:51,206 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-30 23:43:51,206 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-30 23:43:51,206 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-30 23:43:51,207 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-30 23:43:51,207 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-30 23:43:51,207 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-30 23:43:51,207 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-30 23:43:51,207 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-30 23:43:51,208 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:43:51,208 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-30 23:43:51,208 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-30 23:43:51,209 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-30 23:43:51,209 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-30 23:43:51,209 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-30 23:43:51,209 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-30 23:43:51,209 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-30 23:43:51,264 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-30 23:43:51,278 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-30 23:43:51,284 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-30 23:43:51,286 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-30 23:43:51,286 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-30 23:43:51,287 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/simple4.i_3.bpl [2018-09-30 23:43:51,289 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/simple4.i_3.bpl' [2018-09-30 23:43:51,348 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-30 23:43:51,351 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-30 23:43:51,352 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-30 23:43:51,352 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-30 23:43:51,353 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-30 23:43:51,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:51" (1/1) ... [2018-09-30 23:43:51,387 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:51" (1/1) ... [2018-09-30 23:43:51,395 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-30 23:43:51,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-30 23:43:51,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-30 23:43:51,396 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-30 23:43:51,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:51" (1/1) ... [2018-09-30 23:43:51,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:51" (1/1) ... [2018-09-30 23:43:51,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:51" (1/1) ... [2018-09-30 23:43:51,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:51" (1/1) ... [2018-09-30 23:43:51,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:51" (1/1) ... [2018-09-30 23:43:51,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:51" (1/1) ... [2018-09-30 23:43:51,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:51" (1/1) ... [2018-09-30 23:43:51,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-30 23:43:51,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-30 23:43:51,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-30 23:43:51,419 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-30 23:43:51,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-30 23:43:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-30 23:43:51,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-30 23:43:51,693 INFO L348 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-30 23:43:51,694 INFO L202 PluginConnector]: Adding new model simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:43:51 BoogieIcfgContainer [2018-09-30 23:43:51,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-30 23:43:51,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-30 23:43:51,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-30 23:43:51,699 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-30 23:43:51,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 11:43:51" (1/2) ... [2018-09-30 23:43:51,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f5755f9 and model type simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 11:43:51, skipping insertion in model container [2018-09-30 23:43:51,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple4.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 11:43:51" (2/2) ... [2018-09-30 23:43:51,702 INFO L112 eAbstractionObserver]: Analyzing ICFG simple4.i_3.bpl [2018-09-30 23:43:51,712 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-30 23:43:51,721 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-30 23:43:51,774 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-30 23:43:51,775 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-30 23:43:51,775 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-30 23:43:51,776 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-30 23:43:51,776 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-30 23:43:51,776 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-30 23:43:51,776 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-30 23:43:51,776 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-30 23:43:51,777 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-30 23:43:51,795 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-30 23:43:51,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-30 23:43:51,813 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:51,817 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-30 23:43:51,818 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:51,825 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:51,826 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-30 23:43:51,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:51,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:51,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:51,890 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:51,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:52,071 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-30 23:43:52,072 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-30 23:43:52,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-30 23:43:52,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-30 23:43:52,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:43:52,095 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-30 23:43:52,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:52,132 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-09-30 23:43:52,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-30 23:43:52,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-30 23:43:52,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:52,148 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:43:52,148 INFO L226 Difference]: Without dead ends: 7 [2018-09-30 23:43:52,155 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-30 23:43:52,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-30 23:43:52,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-30 23:43:52,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-30 23:43:52,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-09-30 23:43:52,208 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-09-30 23:43:52,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:52,208 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-09-30 23:43:52,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-30 23:43:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-09-30 23:43:52,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-30 23:43:52,209 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:52,210 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-09-30 23:43:52,210 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:52,210 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:52,210 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-09-30 23:43:52,211 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:52,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:52,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:52,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:52,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:52,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:52,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:52,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:52,456 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:52,577 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:52,577 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-09-30 23:43:52,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-30 23:43:52,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-30 23:43:52,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:43:52,580 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-09-30 23:43:52,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:52,705 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-09-30 23:43:52,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-30 23:43:52,707 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-30 23:43:52,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:52,709 INFO L225 Difference]: With dead ends: 11 [2018-09-30 23:43:52,709 INFO L226 Difference]: Without dead ends: 9 [2018-09-30 23:43:52,710 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-30 23:43:52,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-09-30 23:43:52,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-09-30 23:43:52,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-30 23:43:52,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-09-30 23:43:52,715 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-09-30 23:43:52,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:52,716 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-09-30 23:43:52,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-30 23:43:52,716 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-09-30 23:43:52,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-30 23:43:52,717 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:52,717 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-09-30 23:43:52,717 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:52,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:52,719 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-09-30 23:43:52,719 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:52,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:52,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:52,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:52,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:52,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:52,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:52,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:52,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:43:52,972 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:43:52,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:52,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:53,007 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:53,007 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-30 23:43:53,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-30 23:43:53,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-30 23:43:53,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:43:53,008 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-09-30 23:43:53,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:53,058 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-09-30 23:43:53,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-30 23:43:53,059 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-09-30 23:43:53,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:53,060 INFO L225 Difference]: With dead ends: 13 [2018-09-30 23:43:53,060 INFO L226 Difference]: Without dead ends: 11 [2018-09-30 23:43:53,060 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-30 23:43:53,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-30 23:43:53,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-30 23:43:53,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-30 23:43:53,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-09-30 23:43:53,066 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-09-30 23:43:53,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:53,067 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-09-30 23:43:53,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-30 23:43:53,067 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-09-30 23:43:53,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-30 23:43:53,068 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:53,068 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-09-30 23:43:53,068 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:53,068 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:53,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-09-30 23:43:53,069 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:53,069 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:53,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:53,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:53,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:53,410 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:53,410 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:53,424 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:43:53,456 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-09-30 23:43:53,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:53,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:53,503 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:53,504 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-09-30 23:43:53,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-30 23:43:53,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-30 23:43:53,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:43:53,505 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-09-30 23:43:53,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:53,596 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-09-30 23:43:53,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-30 23:43:53,598 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-09-30 23:43:53,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:53,600 INFO L225 Difference]: With dead ends: 15 [2018-09-30 23:43:53,602 INFO L226 Difference]: Without dead ends: 13 [2018-09-30 23:43:53,602 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-09-30 23:43:53,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-30 23:43:53,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-30 23:43:53,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-30 23:43:53,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-09-30 23:43:53,609 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-09-30 23:43:53,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:53,609 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-09-30 23:43:53,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-30 23:43:53,610 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-09-30 23:43:53,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-30 23:43:53,611 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:53,611 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-09-30 23:43:53,611 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:53,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:53,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-09-30 23:43:53,612 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:53,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:53,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:53,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:53,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:53,792 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:53,792 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:53,792 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:53,800 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:43:53,824 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:43:53,825 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:53,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:53,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:53,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-30 23:43:53,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-30 23:43:53,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-30 23:43:53,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:43:53,926 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-09-30 23:43:53,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:53,982 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-09-30 23:43:53,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-30 23:43:53,983 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-09-30 23:43:53,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:53,984 INFO L225 Difference]: With dead ends: 17 [2018-09-30 23:43:53,985 INFO L226 Difference]: Without dead ends: 15 [2018-09-30 23:43:53,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-09-30 23:43:53,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-09-30 23:43:53,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-09-30 23:43:53,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-09-30 23:43:53,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-09-30 23:43:53,991 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-09-30 23:43:53,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:53,991 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-09-30 23:43:53,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-30 23:43:53,992 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-09-30 23:43:53,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-09-30 23:43:53,992 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:53,992 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-09-30 23:43:53,993 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:53,993 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:53,993 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-09-30 23:43:53,993 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:53,993 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:53,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:53,995 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:53,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:54,190 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:54,190 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:54,200 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:43:54,312 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-09-30 23:43:54,312 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:54,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:54,401 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:54,401 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-30 23:43:54,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-30 23:43:54,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-30 23:43:54,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:43:54,403 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-09-30 23:43:54,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:54,491 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-09-30 23:43:54,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-30 23:43:54,491 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-09-30 23:43:54,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:54,493 INFO L225 Difference]: With dead ends: 19 [2018-09-30 23:43:54,493 INFO L226 Difference]: Without dead ends: 17 [2018-09-30 23:43:54,494 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-09-30 23:43:54,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-09-30 23:43:54,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-09-30 23:43:54,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-09-30 23:43:54,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-09-30 23:43:54,499 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-09-30 23:43:54,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:54,499 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-09-30 23:43:54,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-30 23:43:54,499 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-09-30 23:43:54,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-30 23:43:54,500 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:54,500 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-09-30 23:43:54,500 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:54,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:54,501 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-09-30 23:43:54,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:54,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:54,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:54,502 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:54,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:55,012 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:55,012 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:55,013 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:55,030 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:43:55,072 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-09-30 23:43:55,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:55,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:55,091 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:55,114 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:55,115 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-09-30 23:43:55,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-30 23:43:55,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-30 23:43:55,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:43:55,116 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-09-30 23:43:55,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:55,324 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-09-30 23:43:55,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-30 23:43:55,327 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-09-30 23:43:55,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:55,328 INFO L225 Difference]: With dead ends: 21 [2018-09-30 23:43:55,328 INFO L226 Difference]: Without dead ends: 19 [2018-09-30 23:43:55,328 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-09-30 23:43:55,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-09-30 23:43:55,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-09-30 23:43:55,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-09-30 23:43:55,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-09-30 23:43:55,333 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-09-30 23:43:55,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:55,333 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-09-30 23:43:55,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-30 23:43:55,333 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-09-30 23:43:55,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-30 23:43:55,334 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:55,334 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-09-30 23:43:55,335 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:55,335 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:55,335 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-09-30 23:43:55,335 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:55,335 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:55,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:55,336 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:55,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:55,627 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:55,627 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:55,627 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:55,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:55,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:55,683 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:55,703 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:55,704 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-30 23:43:55,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-30 23:43:55,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-30 23:43:55,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:43:55,705 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-09-30 23:43:55,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:55,805 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-09-30 23:43:55,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-30 23:43:55,806 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-09-30 23:43:55,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:55,807 INFO L225 Difference]: With dead ends: 23 [2018-09-30 23:43:55,808 INFO L226 Difference]: Without dead ends: 21 [2018-09-30 23:43:55,808 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-09-30 23:43:55,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-09-30 23:43:55,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-09-30 23:43:55,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-09-30 23:43:55,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-09-30 23:43:55,813 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-09-30 23:43:55,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:55,814 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-09-30 23:43:55,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-30 23:43:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-09-30 23:43:55,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-30 23:43:55,815 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:55,815 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-09-30 23:43:55,815 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:55,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:55,815 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-09-30 23:43:55,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:55,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:55,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:55,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:43:55,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:55,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:56,126 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:56,126 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:56,135 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:43:56,149 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:43:56,149 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:56,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:56,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:56,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-30 23:43:56,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-30 23:43:56,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-30 23:43:56,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:43:56,212 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-09-30 23:43:56,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:56,342 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-09-30 23:43:56,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-30 23:43:56,343 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-09-30 23:43:56,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:56,344 INFO L225 Difference]: With dead ends: 25 [2018-09-30 23:43:56,344 INFO L226 Difference]: Without dead ends: 23 [2018-09-30 23:43:56,345 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-09-30 23:43:56,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-09-30 23:43:56,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-09-30 23:43:56,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-09-30 23:43:56,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-09-30 23:43:56,350 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-09-30 23:43:56,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:56,351 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-09-30 23:43:56,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-30 23:43:56,351 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-09-30 23:43:56,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-09-30 23:43:56,352 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:56,352 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-09-30 23:43:56,352 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:56,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:56,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-09-30 23:43:56,353 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:56,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:56,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:56,354 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:56,354 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:56,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:56,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:56,536 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:56,547 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:43:56,653 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-09-30 23:43:56,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:56,656 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:56,688 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:56,688 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-30 23:43:56,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-30 23:43:56,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-30 23:43:56,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:43:56,689 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2018-09-30 23:43:56,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:56,837 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-09-30 23:43:56,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-30 23:43:56,838 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2018-09-30 23:43:56,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:56,839 INFO L225 Difference]: With dead ends: 27 [2018-09-30 23:43:56,839 INFO L226 Difference]: Without dead ends: 25 [2018-09-30 23:43:56,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-09-30 23:43:56,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-09-30 23:43:56,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-09-30 23:43:56,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-30 23:43:56,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-09-30 23:43:56,845 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2018-09-30 23:43:56,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:56,845 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-09-30 23:43:56,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-30 23:43:56,846 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-09-30 23:43:56,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-30 23:43:56,846 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:56,847 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1] [2018-09-30 23:43:56,847 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:56,847 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:56,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1724181365, now seen corresponding path program 10 times [2018-09-30 23:43:56,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:56,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:56,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:56,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:56,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:57,028 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:57,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:57,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:57,039 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:43:57,053 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:43:57,053 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:43:57,056 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:43:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:57,110 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:43:57,111 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-30 23:43:57,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-30 23:43:57,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-30 23:43:57,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:43:57,112 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2018-09-30 23:43:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:43:57,341 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-09-30 23:43:57,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-30 23:43:57,342 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2018-09-30 23:43:57,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:43:57,343 INFO L225 Difference]: With dead ends: 29 [2018-09-30 23:43:57,343 INFO L226 Difference]: Without dead ends: 27 [2018-09-30 23:43:57,344 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-09-30 23:43:57,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-09-30 23:43:57,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-09-30 23:43:57,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-09-30 23:43:57,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-09-30 23:43:57,350 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2018-09-30 23:43:57,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:43:57,351 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-09-30 23:43:57,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-30 23:43:57,351 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-09-30 23:43:57,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-09-30 23:43:57,352 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:43:57,352 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1] [2018-09-30 23:43:57,352 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:43:57,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:43:57,352 INFO L82 PathProgramCache]: Analyzing trace with hash 919136581, now seen corresponding path program 11 times [2018-09-30 23:43:57,352 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:43:57,353 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:43:57,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:57,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:43:57,353 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:43:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:43:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:43:57,749 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:43:57,749 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:43:57,756 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:45:25,235 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-09-30 23:45:25,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:25,534 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:25,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:25,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-30 23:45:25,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-30 23:45:25,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-30 23:45:25,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:45:25,592 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2018-09-30 23:45:25,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:25,734 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-09-30 23:45:25,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-30 23:45:25,737 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2018-09-30 23:45:25,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:25,738 INFO L225 Difference]: With dead ends: 31 [2018-09-30 23:45:25,738 INFO L226 Difference]: Without dead ends: 29 [2018-09-30 23:45:25,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-09-30 23:45:25,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-09-30 23:45:25,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-09-30 23:45:25,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-09-30 23:45:25,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-09-30 23:45:25,744 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2018-09-30 23:45:25,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:25,745 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-09-30 23:45:25,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-30 23:45:25,745 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-09-30 23:45:25,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-09-30 23:45:25,746 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:25,746 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1] [2018-09-30 23:45:25,746 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:25,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:25,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1472956545, now seen corresponding path program 12 times [2018-09-30 23:45:25,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:25,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:25,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:25,748 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:25,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:26,109 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:26,109 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:45:26,121 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:45:26,783 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-09-30 23:45:26,783 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:26,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:26,833 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:26,833 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-30 23:45:26,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-30 23:45:26,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-30 23:45:26,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:45:26,834 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2018-09-30 23:45:27,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:27,166 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-09-30 23:45:27,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-30 23:45:27,166 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2018-09-30 23:45:27,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:27,168 INFO L225 Difference]: With dead ends: 33 [2018-09-30 23:45:27,168 INFO L226 Difference]: Without dead ends: 31 [2018-09-30 23:45:27,169 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-09-30 23:45:27,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-30 23:45:27,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-09-30 23:45:27,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-09-30 23:45:27,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-09-30 23:45:27,175 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2018-09-30 23:45:27,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:27,175 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-09-30 23:45:27,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-30 23:45:27,175 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-09-30 23:45:27,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-09-30 23:45:27,176 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:27,176 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1] [2018-09-30 23:45:27,176 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:27,176 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:27,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1828020025, now seen corresponding path program 13 times [2018-09-30 23:45:27,177 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:27,177 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:27,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:27,178 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:27,178 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:27,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:27,612 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:27,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:45:27,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:45:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:27,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:27,671 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:27,671 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-30 23:45:27,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-30 23:45:27,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-30 23:45:27,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:45:27,672 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2018-09-30 23:45:27,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:27,856 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-09-30 23:45:27,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-30 23:45:27,856 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2018-09-30 23:45:27,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:27,857 INFO L225 Difference]: With dead ends: 35 [2018-09-30 23:45:27,859 INFO L226 Difference]: Without dead ends: 33 [2018-09-30 23:45:27,859 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-09-30 23:45:27,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-30 23:45:27,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-09-30 23:45:27,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-09-30 23:45:27,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-09-30 23:45:27,866 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2018-09-30 23:45:27,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:27,866 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-09-30 23:45:27,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-30 23:45:27,867 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-09-30 23:45:27,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-09-30 23:45:27,868 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:27,868 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1] [2018-09-30 23:45:27,868 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:27,868 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:27,868 INFO L82 PathProgramCache]: Analyzing trace with hash 85672051, now seen corresponding path program 14 times [2018-09-30 23:45:27,869 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:27,869 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:27,869 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:27,870 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:45:27,870 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:28,287 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:28,287 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:45:28,297 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:45:28,325 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:45:28,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:28,328 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:28,391 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:28,391 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-30 23:45:28,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-30 23:45:28,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-30 23:45:28,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:45:28,392 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2018-09-30 23:45:28,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:28,792 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-09-30 23:45:28,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-30 23:45:28,792 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2018-09-30 23:45:28,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:28,793 INFO L225 Difference]: With dead ends: 37 [2018-09-30 23:45:28,794 INFO L226 Difference]: Without dead ends: 35 [2018-09-30 23:45:28,795 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-09-30 23:45:28,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-09-30 23:45:28,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-09-30 23:45:28,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-09-30 23:45:28,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-09-30 23:45:28,801 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2018-09-30 23:45:28,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:28,801 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-09-30 23:45:28,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-30 23:45:28,801 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-09-30 23:45:28,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-09-30 23:45:28,802 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:28,802 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1] [2018-09-30 23:45:28,803 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:28,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:28,803 INFO L82 PathProgramCache]: Analyzing trace with hash 726514477, now seen corresponding path program 15 times [2018-09-30 23:45:28,803 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:28,803 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:28,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:28,804 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:28,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:29,100 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:29,100 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:45:29,108 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:45:30,281 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-09-30 23:45:30,281 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:30,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:30,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:30,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-30 23:45:30,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-30 23:45:30,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-30 23:45:30,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:45:30,340 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2018-09-30 23:45:30,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:30,650 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-09-30 23:45:30,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-30 23:45:30,652 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2018-09-30 23:45:30,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:30,652 INFO L225 Difference]: With dead ends: 39 [2018-09-30 23:45:30,652 INFO L226 Difference]: Without dead ends: 37 [2018-09-30 23:45:30,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-09-30 23:45:30,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-09-30 23:45:30,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-09-30 23:45:30,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-09-30 23:45:30,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-09-30 23:45:30,658 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2018-09-30 23:45:30,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:30,658 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-09-30 23:45:30,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-30 23:45:30,659 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-09-30 23:45:30,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-09-30 23:45:30,659 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:30,660 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1] [2018-09-30 23:45:30,660 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:30,660 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:30,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1899204761, now seen corresponding path program 16 times [2018-09-30 23:45:30,660 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:30,660 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:30,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:30,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:30,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:31,015 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:31,016 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:31,016 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:45:31,024 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:45:31,051 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:45:31,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:45:31,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:45:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:31,139 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:45:31,139 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-30 23:45:31,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-30 23:45:31,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-30 23:45:31,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:45:31,140 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2018-09-30 23:45:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:45:31,393 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-09-30 23:45:31,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-30 23:45:31,400 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2018-09-30 23:45:31,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:45:31,400 INFO L225 Difference]: With dead ends: 41 [2018-09-30 23:45:31,400 INFO L226 Difference]: Without dead ends: 39 [2018-09-30 23:45:31,401 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-09-30 23:45:31,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-09-30 23:45:31,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-09-30 23:45:31,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-09-30 23:45:31,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-09-30 23:45:31,410 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2018-09-30 23:45:31,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:45:31,411 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-09-30 23:45:31,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-30 23:45:31,411 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-09-30 23:45:31,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-09-30 23:45:31,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:45:31,412 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1] [2018-09-30 23:45:31,412 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:45:31,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:45:31,413 INFO L82 PathProgramCache]: Analyzing trace with hash 225377569, now seen corresponding path program 17 times [2018-09-30 23:45:31,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:45:31,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:45:31,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:31,414 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:45:31,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:45:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:45:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:45:31,776 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:45:31,776 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:45:31,784 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:48:19,356 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-09-30 23:48:19,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:48:19,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:48:19,836 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:19,842 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:48:19,842 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-30 23:48:19,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-30 23:48:19,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-30 23:48:19,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:48:19,843 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2018-09-30 23:48:20,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:48:20,220 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-09-30 23:48:20,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-30 23:48:20,220 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2018-09-30 23:48:20,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:48:20,221 INFO L225 Difference]: With dead ends: 43 [2018-09-30 23:48:20,221 INFO L226 Difference]: Without dead ends: 41 [2018-09-30 23:48:20,222 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-09-30 23:48:20,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-09-30 23:48:20,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-09-30 23:48:20,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-30 23:48:20,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-09-30 23:48:20,229 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2018-09-30 23:48:20,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:48:20,229 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-09-30 23:48:20,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-30 23:48:20,230 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-09-30 23:48:20,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-30 23:48:20,231 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:48:20,231 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2018-09-30 23:48:20,231 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:48:20,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:48:20,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1839531099, now seen corresponding path program 18 times [2018-09-30 23:48:20,232 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:48:20,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:48:20,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:20,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:48:20,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:48:20,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:48:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:48:20,618 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:48:20,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:48:20,625 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-30 23:49:08,440 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-09-30 23:49:08,441 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:08,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:08,951 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:08,951 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-30 23:49:08,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-30 23:49:08,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-30 23:49:08,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:49:08,952 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2018-09-30 23:49:09,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:09,723 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-09-30 23:49:09,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-30 23:49:09,724 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2018-09-30 23:49:09,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:09,724 INFO L225 Difference]: With dead ends: 45 [2018-09-30 23:49:09,724 INFO L226 Difference]: Without dead ends: 43 [2018-09-30 23:49:09,725 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-09-30 23:49:09,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-30 23:49:09,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-09-30 23:49:09,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-09-30 23:49:09,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-09-30 23:49:09,730 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2018-09-30 23:49:09,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:09,730 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-09-30 23:49:09,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-30 23:49:09,731 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-09-30 23:49:09,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-09-30 23:49:09,731 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:09,731 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1] [2018-09-30 23:49:09,732 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:09,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:09,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1737087723, now seen corresponding path program 19 times [2018-09-30 23:49:09,732 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:09,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:09,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:09,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:09,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:10,404 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:10,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:10,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:49:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:10,430 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:10,501 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:10,501 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-30 23:49:10,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-30 23:49:10,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-30 23:49:10,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:49:10,502 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2018-09-30 23:49:10,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:10,975 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-09-30 23:49:10,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-30 23:49:10,975 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2018-09-30 23:49:10,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:10,976 INFO L225 Difference]: With dead ends: 47 [2018-09-30 23:49:10,976 INFO L226 Difference]: Without dead ends: 45 [2018-09-30 23:49:10,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-09-30 23:49:10,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-09-30 23:49:10,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-09-30 23:49:10,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-09-30 23:49:10,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-09-30 23:49:10,983 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2018-09-30 23:49:10,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:10,983 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-09-30 23:49:10,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-30 23:49:10,983 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-09-30 23:49:10,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-09-30 23:49:10,984 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:10,984 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1] [2018-09-30 23:49:10,984 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:10,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:10,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1401028431, now seen corresponding path program 20 times [2018-09-30 23:49:10,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:10,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:10,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:10,985 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-30 23:49:10,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:11,396 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:11,396 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:11,409 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-30 23:49:11,424 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-30 23:49:11,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:11,426 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:11,451 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:11,481 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:11,481 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-30 23:49:11,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-30 23:49:11,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-30 23:49:11,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:49:11,483 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2018-09-30 23:49:11,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:11,876 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-09-30 23:49:11,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-30 23:49:11,876 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2018-09-30 23:49:11,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:11,877 INFO L225 Difference]: With dead ends: 49 [2018-09-30 23:49:11,877 INFO L226 Difference]: Without dead ends: 47 [2018-09-30 23:49:11,877 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-09-30 23:49:11,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-30 23:49:11,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-30 23:49:11,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-30 23:49:11,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-09-30 23:49:11,883 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2018-09-30 23:49:11,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:11,884 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-09-30 23:49:11,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-30 23:49:11,884 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-09-30 23:49:11,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-30 23:49:11,884 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:11,884 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1] [2018-09-30 23:49:11,885 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:11,885 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:11,885 INFO L82 PathProgramCache]: Analyzing trace with hash 2063610633, now seen corresponding path program 21 times [2018-09-30 23:49:11,885 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:11,885 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:11,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:11,886 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:11,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:12,254 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:12,254 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:12,262 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-30 23:49:46,757 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-09-30 23:49:46,757 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:46,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:46,835 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:46,836 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-30 23:49:46,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-30 23:49:46,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-30 23:49:46,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:49:46,837 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2018-09-30 23:49:47,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:47,206 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-09-30 23:49:47,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-30 23:49:47,209 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2018-09-30 23:49:47,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:47,210 INFO L225 Difference]: With dead ends: 51 [2018-09-30 23:49:47,210 INFO L226 Difference]: Without dead ends: 49 [2018-09-30 23:49:47,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-09-30 23:49:47,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-09-30 23:49:47,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-09-30 23:49:47,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-09-30 23:49:47,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-09-30 23:49:47,215 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2018-09-30 23:49:47,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:47,216 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-09-30 23:49:47,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-30 23:49:47,216 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-09-30 23:49:47,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-09-30 23:49:47,216 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:47,216 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1] [2018-09-30 23:49:47,217 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:47,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:47,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1145020349, now seen corresponding path program 22 times [2018-09-30 23:49:47,217 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:47,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:47,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:47,218 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:47,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:48,258 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:48,258 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:48,266 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-30 23:49:48,279 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-30 23:49:48,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:49:48,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:49:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:48,341 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:49:48,341 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-30 23:49:48,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-30 23:49:48,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-30 23:49:48,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:49:48,342 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2018-09-30 23:49:48,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:49:48,890 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-09-30 23:49:48,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-30 23:49:48,891 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2018-09-30 23:49:48,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:49:48,891 INFO L225 Difference]: With dead ends: 53 [2018-09-30 23:49:48,891 INFO L226 Difference]: Without dead ends: 51 [2018-09-30 23:49:48,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-09-30 23:49:48,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-30 23:49:48,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-09-30 23:49:48,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-30 23:49:48,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-09-30 23:49:48,903 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2018-09-30 23:49:48,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:49:48,903 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-09-30 23:49:48,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-30 23:49:48,903 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-09-30 23:49:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-09-30 23:49:48,907 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:49:48,907 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1] [2018-09-30 23:49:48,907 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:49:48,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:49:48,908 INFO L82 PathProgramCache]: Analyzing trace with hash -852875523, now seen corresponding path program 23 times [2018-09-30 23:49:48,908 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:49:48,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:49:48,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:48,908 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:49:48,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:49:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:49:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:49:49,390 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:49:49,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:49:49,397 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-30 23:53:58,815 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-09-30 23:53:58,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-30 23:54:00,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-30 23:54:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:00,460 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-30 23:54:00,460 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-30 23:54:00,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-30 23:54:00,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-30 23:54:00,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:54:00,462 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2018-09-30 23:54:00,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-30 23:54:00,915 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-09-30 23:54:00,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-30 23:54:00,915 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2018-09-30 23:54:00,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-30 23:54:00,916 INFO L225 Difference]: With dead ends: 55 [2018-09-30 23:54:00,916 INFO L226 Difference]: Without dead ends: 53 [2018-09-30 23:54:00,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-09-30 23:54:00,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-30 23:54:00,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-30 23:54:00,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-30 23:54:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-09-30 23:54:00,922 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2018-09-30 23:54:00,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-30 23:54:00,923 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-09-30 23:54:00,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-30 23:54:00,923 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-09-30 23:54:00,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-30 23:54:00,923 INFO L367 BasicCegarLoop]: Found error trace [2018-09-30 23:54:00,923 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1] [2018-09-30 23:54:00,923 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-30 23:54:00,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-30 23:54:00,924 INFO L82 PathProgramCache]: Analyzing trace with hash 725428023, now seen corresponding path program 24 times [2018-09-30 23:54:00,924 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-30 23:54:00,924 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-30 23:54:00,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:00,925 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-30 23:54:00,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-30 23:54:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-30 23:54:01,671 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-30 23:54:01,671 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-30 23:54:01,671 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-30 23:54:01,679 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown