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/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2eb0a67 [2018-10-03 08:39:06,223 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-03 08:39:06,224 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-03 08:39:06,241 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-10-03 08:39:06,273 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 [2018-10-03 08:39:06,289 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-03 08:39:06,289 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-03 08:39:06,290 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-03 08:39:06,290 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-03 08:39:06,290 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-03 08:39:06,291 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-03 08:39:06,291 INFO L133 SettingsManager]: * Use SBE=true [2018-10-03 08:39:06,291 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-03 08:39:06,291 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-03 08:39:06,291 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-03 08:39:06,292 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-03 08:39:06,292 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-03 08:39:06,292 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-03 08:39:06,292 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-03 08:39:06,292 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-03 08:39:06,293 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-03 08:39:06,293 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-03 08:39:06,293 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-03 08:39:06,293 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-03 08:39:06,293 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-03 08:39:06,294 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-03 08:39:06,294 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-03 08:39:06,294 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:39:06,294 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-03 08:39:06,294 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-03 08:39:06,295 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-03 08:39:06,295 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-03 08:39:06,295 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-03 08:39:06,295 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-03 08:39:06,295 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-03 08:39:06,337 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-03 08:39:06,350 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-03 08:39:06,353 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-03 08:39:06,355 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-03 08:39:06,356 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-03 08:39:06,356 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-10-03 08:39:06,357 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/down.i_4.bplTransformedIcfg_BEv2_5.bpl' [2018-10-03 08:39:06,411 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-03 08:39:06,414 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-03 08:39:06,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-03 08:39:06,415 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-03 08:39:06,415 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-03 08:39:06,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:06" (1/1) ... [2018-10-03 08:39:06,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:06" (1/1) ... [2018-10-03 08:39:06,455 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-03 08:39:06,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-03 08:39:06,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-03 08:39:06,456 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-03 08:39:06,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:06" (1/1) ... [2018-10-03 08:39:06,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:06" (1/1) ... [2018-10-03 08:39:06,468 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:06" (1/1) ... [2018-10-03 08:39:06,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:06" (1/1) ... [2018-10-03 08:39:06,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:06" (1/1) ... [2018-10-03 08:39:06,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:06" (1/1) ... [2018-10-03 08:39:06,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:06" (1/1) ... [2018-10-03 08:39:06,479 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-03 08:39:06,480 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-03 08:39:06,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-03 08:39:06,481 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-03 08:39:06,482 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-03 08:39:06,556 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-03 08:39:06,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-03 08:39:06,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-03 08:39:06,797 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-03 08:39:06,797 INFO L202 PluginConnector]: Adding new model down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:39:06 BoogieIcfgContainer [2018-10-03 08:39:06,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-03 08:39:06,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-03 08:39:06,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-03 08:39:06,802 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-03 08:39:06,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.10 08:39:06" (1/2) ... [2018-10-03 08:39:06,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@427b6cd1 and model type down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 08:39:06, skipping insertion in model container [2018-10-03 08:39:06,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 08:39:06" (2/2) ... [2018-10-03 08:39:06,806 INFO L112 eAbstractionObserver]: Analyzing ICFG down.i_4.bplTransformedIcfg_BEv2_5.bpl [2018-10-03 08:39:06,816 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-03 08:39:06,825 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-03 08:39:06,885 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-03 08:39:06,886 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-03 08:39:06,886 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-03 08:39:06,887 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-03 08:39:06,887 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-03 08:39:06,887 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-03 08:39:06,887 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-03 08:39:06,888 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-03 08:39:06,888 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-03 08:39:06,908 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2018-10-03 08:39:06,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-03 08:39:06,922 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:06,926 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-03 08:39:06,928 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:06,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:06,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1951930377, now seen corresponding path program 1 times [2018-10-03 08:39:06,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:06,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:06,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:06,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:06,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:07,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:07,130 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:39:07,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-03 08:39:07,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-03 08:39:07,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-03 08:39:07,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-03 08:39:07,150 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2018-10-03 08:39:07,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:07,208 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2018-10-03 08:39:07,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-03 08:39:07,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-10-03 08:39:07,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:07,225 INFO L225 Difference]: With dead ends: 23 [2018-10-03 08:39:07,226 INFO L226 Difference]: Without dead ends: 15 [2018-10-03 08:39:07,235 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 [2018-10-03 08:39:07,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-03 08:39:07,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2018-10-03 08:39:07,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-03 08:39:07,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2018-10-03 08:39:07,309 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 7 [2018-10-03 08:39:07,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:07,309 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2018-10-03 08:39:07,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-03 08:39:07,310 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2018-10-03 08:39:07,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-03 08:39:07,310 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:07,311 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-03 08:39:07,311 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:07,311 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:07,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1951989959, now seen corresponding path program 1 times [2018-10-03 08:39:07,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:07,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:07,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:07,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:07,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:07,405 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:39:07,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-03 08:39:07,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 08:39:07,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 08:39:07,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:39:07,409 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand 4 states. [2018-10-03 08:39:07,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:07,497 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2018-10-03 08:39:07,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 08:39:07,498 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2018-10-03 08:39:07,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:07,499 INFO L225 Difference]: With dead ends: 20 [2018-10-03 08:39:07,499 INFO L226 Difference]: Without dead ends: 13 [2018-10-03 08:39:07,500 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:39:07,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-03 08:39:07,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-03 08:39:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-03 08:39:07,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2018-10-03 08:39:07,505 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 7 [2018-10-03 08:39:07,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:07,505 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2018-10-03 08:39:07,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 08:39:07,506 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2018-10-03 08:39:07,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 08:39:07,506 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:07,506 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-03 08:39:07,507 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:07,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:07,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1455783312, now seen corresponding path program 1 times [2018-10-03 08:39:07,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:07,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:07,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:07,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:07,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:07,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-03 08:39:07,607 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:39:07,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-03 08:39:07,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 08:39:07,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 08:39:07,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:39:07,608 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 4 states. [2018-10-03 08:39:07,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:07,683 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2018-10-03 08:39:07,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:39:07,684 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-10-03 08:39:07,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:07,685 INFO L225 Difference]: With dead ends: 19 [2018-10-03 08:39:07,685 INFO L226 Difference]: Without dead ends: 17 [2018-10-03 08:39:07,686 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:39:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-03 08:39:07,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 13. [2018-10-03 08:39:07,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-03 08:39:07,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2018-10-03 08:39:07,691 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2018-10-03 08:39:07,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:07,691 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2018-10-03 08:39:07,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 08:39:07,691 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2018-10-03 08:39:07,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-03 08:39:07,692 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:07,692 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-10-03 08:39:07,692 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:07,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:07,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1455723730, now seen corresponding path program 1 times [2018-10-03 08:39:07,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:07,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:07,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:07,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:07,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:07,764 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-03 08:39:07,765 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-03 08:39:07,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-03 08:39:07,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-03 08:39:07,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:39:07,766 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 4 states. [2018-10-03 08:39:07,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:07,809 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2018-10-03 08:39:07,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-03 08:39:07,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-10-03 08:39:07,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:07,810 INFO L225 Difference]: With dead ends: 25 [2018-10-03 08:39:07,810 INFO L226 Difference]: Without dead ends: 19 [2018-10-03 08:39:07,811 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-10-03 08:39:07,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-03 08:39:07,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2018-10-03 08:39:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-03 08:39:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2018-10-03 08:39:07,817 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2018-10-03 08:39:07,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:07,817 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2018-10-03 08:39:07,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-03 08:39:07,818 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2018-10-03 08:39:07,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-03 08:39:07,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:07,818 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-03 08:39:07,819 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:07,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:07,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1394403420, now seen corresponding path program 1 times [2018-10-03 08:39:07,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:07,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:07,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:07,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:07,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:07,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:07,940 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:07,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:07,996 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:08,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:08,038 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:08,038 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:39:08,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:39:08,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:39:08,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:39:08,039 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 6 states. [2018-10-03 08:39:08,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:08,224 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-10-03 08:39:08,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:39:08,225 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-10-03 08:39:08,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:08,226 INFO L225 Difference]: With dead ends: 31 [2018-10-03 08:39:08,226 INFO L226 Difference]: Without dead ends: 16 [2018-10-03 08:39:08,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:39:08,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-03 08:39:08,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-03 08:39:08,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-03 08:39:08,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-10-03 08:39:08,232 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2018-10-03 08:39:08,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:08,232 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-10-03 08:39:08,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:39:08,233 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-10-03 08:39:08,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-03 08:39:08,233 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:08,234 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-03 08:39:08,234 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:08,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:08,234 INFO L82 PathProgramCache]: Analyzing trace with hash -961145443, now seen corresponding path program 2 times [2018-10-03 08:39:08,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:08,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:08,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:08,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:08,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:08,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:08,390 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:08,406 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:08,451 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:08,451 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:08,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:08,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:08,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:08,496 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-10-03 08:39:08,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-03 08:39:08,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-03 08:39:08,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:39:08,497 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2018-10-03 08:39:08,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:08,636 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-10-03 08:39:08,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-03 08:39:08,637 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-10-03 08:39:08,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:08,638 INFO L225 Difference]: With dead ends: 30 [2018-10-03 08:39:08,639 INFO L226 Difference]: Without dead ends: 24 [2018-10-03 08:39:08,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-10-03 08:39:08,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-03 08:39:08,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2018-10-03 08:39:08,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-03 08:39:08,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2018-10-03 08:39:08,653 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2018-10-03 08:39:08,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:08,654 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2018-10-03 08:39:08,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-03 08:39:08,654 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2018-10-03 08:39:08,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-03 08:39:08,655 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:08,655 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-10-03 08:39:08,658 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:08,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:08,658 INFO L82 PathProgramCache]: Analyzing trace with hash -552275309, now seen corresponding path program 3 times [2018-10-03 08:39:08,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:08,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:08,660 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:08,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:08,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:08,857 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:08,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:08,858 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:08,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:08,912 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-03 08:39:08,913 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:08,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:08,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:08,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:39:08,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:39:08,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:39:08,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:39:08,946 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 8 states. [2018-10-03 08:39:09,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:09,077 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-10-03 08:39:09,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:39:09,077 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2018-10-03 08:39:09,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:09,078 INFO L225 Difference]: With dead ends: 40 [2018-10-03 08:39:09,078 INFO L226 Difference]: Without dead ends: 21 [2018-10-03 08:39:09,079 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:39:09,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-03 08:39:09,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-03 08:39:09,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-03 08:39:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-10-03 08:39:09,085 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2018-10-03 08:39:09,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:09,086 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-10-03 08:39:09,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:39:09,086 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-10-03 08:39:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-03 08:39:09,087 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:09,087 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2018-10-03 08:39:09,087 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:09,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:09,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2071906362, now seen corresponding path program 4 times [2018-10-03 08:39:09,088 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:09,088 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:09,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:09,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:09,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:09,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:09,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:09,207 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:09,222 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:09,223 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:09,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:09,255 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:09,255 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-03 08:39:09,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-03 08:39:09,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-03 08:39:09,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:39:09,256 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2018-10-03 08:39:09,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:09,422 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-10-03 08:39:09,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-03 08:39:09,424 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2018-10-03 08:39:09,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:09,425 INFO L225 Difference]: With dead ends: 35 [2018-10-03 08:39:09,425 INFO L226 Difference]: Without dead ends: 29 [2018-10-03 08:39:09,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-10-03 08:39:09,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-03 08:39:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2018-10-03 08:39:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-03 08:39:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-03 08:39:09,436 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 18 [2018-10-03 08:39:09,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:09,436 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-03 08:39:09,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-03 08:39:09,437 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-03 08:39:09,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-03 08:39:09,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:09,441 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:09,442 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:09,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:09,442 INFO L82 PathProgramCache]: Analyzing trace with hash -992407888, now seen corresponding path program 5 times [2018-10-03 08:39:09,442 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:09,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:09,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:09,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:09,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:09,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:09,706 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:09,723 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:09,775 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-03 08:39:09,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:09,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:09,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:09,814 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:39:09,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:39:09,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:39:09,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:39:09,815 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-10-03 08:39:10,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:10,084 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-10-03 08:39:10,084 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:39:10,084 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2018-10-03 08:39:10,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:10,085 INFO L225 Difference]: With dead ends: 49 [2018-10-03 08:39:10,086 INFO L226 Difference]: Without dead ends: 26 [2018-10-03 08:39:10,087 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:39:10,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-03 08:39:10,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-03 08:39:10,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-03 08:39:10,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-10-03 08:39:10,093 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2018-10-03 08:39:10,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:10,093 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-10-03 08:39:10,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:39:10,093 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-10-03 08:39:10,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-03 08:39:10,094 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:10,094 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2018-10-03 08:39:10,094 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:10,094 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:10,095 INFO L82 PathProgramCache]: Analyzing trace with hash 390441321, now seen corresponding path program 6 times [2018-10-03 08:39:10,095 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:10,095 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:10,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:10,096 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:10,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:10,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:10,191 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:10,191 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:10,206 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:10,256 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-03 08:39:10,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:10,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:10,267 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:10,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:10,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-03 08:39:10,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-03 08:39:10,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-03 08:39:10,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:39:10,291 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 7 states. [2018-10-03 08:39:10,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:10,374 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2018-10-03 08:39:10,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-03 08:39:10,375 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-10-03 08:39:10,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:10,376 INFO L225 Difference]: With dead ends: 40 [2018-10-03 08:39:10,376 INFO L226 Difference]: Without dead ends: 34 [2018-10-03 08:39:10,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-03 08:39:10,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-03 08:39:10,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2018-10-03 08:39:10,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-03 08:39:10,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-10-03 08:39:10,385 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 23 [2018-10-03 08:39:10,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:10,385 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-10-03 08:39:10,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-03 08:39:10,385 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-10-03 08:39:10,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-03 08:39:10,386 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:10,386 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-03 08:39:10,386 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:10,387 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:10,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1927135327, now seen corresponding path program 7 times [2018-10-03 08:39:10,387 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:10,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:10,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:10,388 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:10,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:10,550 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:10,550 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:10,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:10,586 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:10,616 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:10,616 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-03 08:39:10,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 08:39:10,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 08:39:10,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:39:10,618 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 12 states. [2018-10-03 08:39:10,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:10,862 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2018-10-03 08:39:10,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 08:39:10,863 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2018-10-03 08:39:10,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:10,864 INFO L225 Difference]: With dead ends: 58 [2018-10-03 08:39:10,864 INFO L226 Difference]: Without dead ends: 31 [2018-10-03 08:39:10,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:39:10,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-03 08:39:10,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-03 08:39:10,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-03 08:39:10,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-03 08:39:10,871 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-10-03 08:39:10,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:10,872 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-03 08:39:10,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 08:39:10,872 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-03 08:39:10,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-03 08:39:10,873 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:10,873 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2018-10-03 08:39:10,873 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:10,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:10,874 INFO L82 PathProgramCache]: Analyzing trace with hash -906890938, now seen corresponding path program 8 times [2018-10-03 08:39:10,874 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:10,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:10,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:10,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:10,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:10,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:10,981 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:10,990 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:11,007 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:11,008 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:11,010 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:11,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:11,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-10-03 08:39:11,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-03 08:39:11,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-03 08:39:11,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:39:11,043 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 8 states. [2018-10-03 08:39:11,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:11,156 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-10-03 08:39:11,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-03 08:39:11,157 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2018-10-03 08:39:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:11,158 INFO L225 Difference]: With dead ends: 45 [2018-10-03 08:39:11,158 INFO L226 Difference]: Without dead ends: 39 [2018-10-03 08:39:11,159 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-03 08:39:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-03 08:39:11,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-10-03 08:39:11,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-03 08:39:11,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-10-03 08:39:11,166 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2018-10-03 08:39:11,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:11,167 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-10-03 08:39:11,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-03 08:39:11,167 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-10-03 08:39:11,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-03 08:39:11,168 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:11,168 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-03 08:39:11,168 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:11,169 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:11,169 INFO L82 PathProgramCache]: Analyzing trace with hash -466038340, now seen corresponding path program 9 times [2018-10-03 08:39:11,169 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:11,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:11,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:11,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:11,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:11,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:11,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:11,358 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:11,445 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-03 08:39:11,446 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:11,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:11,459 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 60 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:11,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:11,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-03 08:39:11,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:39:11,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:39:11,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:39:11,500 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 14 states. [2018-10-03 08:39:12,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:12,070 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2018-10-03 08:39:12,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 08:39:12,070 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2018-10-03 08:39:12,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:12,071 INFO L225 Difference]: With dead ends: 67 [2018-10-03 08:39:12,071 INFO L226 Difference]: Without dead ends: 36 [2018-10-03 08:39:12,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:39:12,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-03 08:39:12,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-03 08:39:12,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-03 08:39:12,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-10-03 08:39:12,079 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2018-10-03 08:39:12,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:12,080 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-10-03 08:39:12,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:39:12,080 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-10-03 08:39:12,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-03 08:39:12,081 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:12,081 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2018-10-03 08:39:12,081 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:12,081 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:12,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1282545973, now seen corresponding path program 10 times [2018-10-03 08:39:12,082 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:12,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:12,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:12,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:12,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:12,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:12,227 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:12,227 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:12,235 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:12,277 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:12,278 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:12,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:12,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:12,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-03 08:39:12,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-03 08:39:12,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-03 08:39:12,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:39:12,316 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 9 states. [2018-10-03 08:39:12,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:12,444 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2018-10-03 08:39:12,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-03 08:39:12,445 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-10-03 08:39:12,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:12,446 INFO L225 Difference]: With dead ends: 50 [2018-10-03 08:39:12,446 INFO L226 Difference]: Without dead ends: 44 [2018-10-03 08:39:12,447 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-10-03 08:39:12,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-03 08:39:12,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2018-10-03 08:39:12,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-03 08:39:12,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-10-03 08:39:12,455 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2018-10-03 08:39:12,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:12,455 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-10-03 08:39:12,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-03 08:39:12,456 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-10-03 08:39:12,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-03 08:39:12,457 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:12,457 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-10-03 08:39:12,457 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:12,457 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:12,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1500867115, now seen corresponding path program 11 times [2018-10-03 08:39:12,458 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:12,458 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:12,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:12,459 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:12,459 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:12,668 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:12,668 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:12,669 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:12,677 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:12,746 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-03 08:39:12,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:12,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:12,761 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 84 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:12,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:12,786 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 08:39:12,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 08:39:12,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 08:39:12,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:39:12,787 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 16 states. [2018-10-03 08:39:13,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:13,303 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2018-10-03 08:39:13,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 08:39:13,304 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2018-10-03 08:39:13,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:13,304 INFO L225 Difference]: With dead ends: 76 [2018-10-03 08:39:13,305 INFO L226 Difference]: Without dead ends: 41 [2018-10-03 08:39:13,305 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:39:13,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-03 08:39:13,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-03 08:39:13,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-03 08:39:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2018-10-03 08:39:13,312 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2018-10-03 08:39:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:13,313 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2018-10-03 08:39:13,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 08:39:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2018-10-03 08:39:13,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-03 08:39:13,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:13,314 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1] [2018-10-03 08:39:13,314 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:13,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:13,315 INFO L82 PathProgramCache]: Analyzing trace with hash 594208338, now seen corresponding path program 12 times [2018-10-03 08:39:13,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:13,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:13,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:13,316 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:13,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 40 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:13,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:13,501 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:13,508 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:13,538 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-03 08:39:13,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:13,541 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 40 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:13,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:13,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-03 08:39:13,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-03 08:39:13,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-03 08:39:13,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:39:13,574 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 10 states. [2018-10-03 08:39:13,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:13,711 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2018-10-03 08:39:13,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-03 08:39:13,714 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2018-10-03 08:39:13,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:13,715 INFO L225 Difference]: With dead ends: 55 [2018-10-03 08:39:13,715 INFO L226 Difference]: Without dead ends: 49 [2018-10-03 08:39:13,716 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-10-03 08:39:13,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-03 08:39:13,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2018-10-03 08:39:13,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-03 08:39:13,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-10-03 08:39:13,724 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 38 [2018-10-03 08:39:13,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:13,724 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-10-03 08:39:13,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-03 08:39:13,725 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-10-03 08:39:13,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-03 08:39:13,726 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:13,726 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-03 08:39:13,726 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:13,726 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:13,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1054367944, now seen corresponding path program 13 times [2018-10-03 08:39:13,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:13,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:13,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:13,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:13,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:14,162 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 112 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:14,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:14,162 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:14,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:14,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 112 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:14,238 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:14,238 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-03 08:39:14,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 08:39:14,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 08:39:14,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:39:14,240 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 18 states. [2018-10-03 08:39:14,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:14,722 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2018-10-03 08:39:14,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 08:39:14,722 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2018-10-03 08:39:14,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:14,723 INFO L225 Difference]: With dead ends: 85 [2018-10-03 08:39:14,723 INFO L226 Difference]: Without dead ends: 46 [2018-10-03 08:39:14,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:39:14,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-03 08:39:14,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-03 08:39:14,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-03 08:39:14,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2018-10-03 08:39:14,732 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2018-10-03 08:39:14,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:14,732 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2018-10-03 08:39:14,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 08:39:14,733 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2018-10-03 08:39:14,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-03 08:39:14,734 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:14,734 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2018-10-03 08:39:14,734 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:14,734 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:14,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1098736897, now seen corresponding path program 14 times [2018-10-03 08:39:14,735 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:14,735 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:14,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:14,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:14,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 50 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:15,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:15,060 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:15,071 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:15,103 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:15,104 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:15,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 50 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:15,148 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:15,148 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-10-03 08:39:15,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-03 08:39:15,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-03 08:39:15,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:39:15,150 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 11 states. [2018-10-03 08:39:15,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:15,278 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2018-10-03 08:39:15,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-03 08:39:15,279 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2018-10-03 08:39:15,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:15,280 INFO L225 Difference]: With dead ends: 60 [2018-10-03 08:39:15,280 INFO L226 Difference]: Without dead ends: 54 [2018-10-03 08:39:15,280 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-10-03 08:39:15,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-03 08:39:15,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2018-10-03 08:39:15,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-03 08:39:15,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2018-10-03 08:39:15,290 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 43 [2018-10-03 08:39:15,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:15,291 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2018-10-03 08:39:15,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-03 08:39:15,291 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2018-10-03 08:39:15,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-03 08:39:15,292 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:15,292 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-03 08:39:15,292 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:15,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:15,293 INFO L82 PathProgramCache]: Analyzing trace with hash -48369673, now seen corresponding path program 15 times [2018-10-03 08:39:15,293 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:15,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:15,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:15,294 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:15,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 144 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:15,509 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:15,509 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:15,517 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:15,552 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-03 08:39:15,552 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:15,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 144 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:15,589 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:15,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-03 08:39:15,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:39:15,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:39:15,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:39:15,590 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 20 states. [2018-10-03 08:39:16,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:16,363 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2018-10-03 08:39:16,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 08:39:16,364 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2018-10-03 08:39:16,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:16,364 INFO L225 Difference]: With dead ends: 94 [2018-10-03 08:39:16,364 INFO L226 Difference]: Without dead ends: 51 [2018-10-03 08:39:16,365 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:39:16,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-03 08:39:16,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-03 08:39:16,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-03 08:39:16,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2018-10-03 08:39:16,373 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 47 [2018-10-03 08:39:16,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:16,374 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2018-10-03 08:39:16,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:39:16,374 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2018-10-03 08:39:16,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-03 08:39:16,375 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:16,375 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1] [2018-10-03 08:39:16,375 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:16,376 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:16,376 INFO L82 PathProgramCache]: Analyzing trace with hash 239052638, now seen corresponding path program 16 times [2018-10-03 08:39:16,376 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:16,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:16,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:16,377 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:16,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 61 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:16,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:16,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:16,509 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:16,535 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:16,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:16,537 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 61 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:16,583 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:16,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-10-03 08:39:16,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-03 08:39:16,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-03 08:39:16,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:39:16,585 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 12 states. [2018-10-03 08:39:16,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:16,721 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2018-10-03 08:39:16,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-03 08:39:16,721 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2018-10-03 08:39:16,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:16,722 INFO L225 Difference]: With dead ends: 65 [2018-10-03 08:39:16,722 INFO L226 Difference]: Without dead ends: 59 [2018-10-03 08:39:16,722 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-10-03 08:39:16,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-03 08:39:16,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2018-10-03 08:39:16,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-03 08:39:16,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2018-10-03 08:39:16,730 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 48 [2018-10-03 08:39:16,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:16,731 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2018-10-03 08:39:16,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-03 08:39:16,731 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2018-10-03 08:39:16,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-03 08:39:16,732 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:16,732 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-10-03 08:39:16,732 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:16,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:16,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1074641876, now seen corresponding path program 17 times [2018-10-03 08:39:16,733 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:16,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:16,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:16,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:16,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 180 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:17,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:17,023 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:17,031 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:17,062 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-03 08:39:17,062 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:17,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 180 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:17,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:17,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-03 08:39:17,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 08:39:17,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 08:39:17,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:39:17,111 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2018-10-03 08:39:17,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:17,767 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2018-10-03 08:39:17,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 08:39:17,767 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2018-10-03 08:39:17,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:17,768 INFO L225 Difference]: With dead ends: 103 [2018-10-03 08:39:17,769 INFO L226 Difference]: Without dead ends: 56 [2018-10-03 08:39:17,770 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=731, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:39:17,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-03 08:39:17,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-03 08:39:17,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-03 08:39:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-03 08:39:17,776 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2018-10-03 08:39:17,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:17,777 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-03 08:39:17,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 08:39:17,777 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-03 08:39:17,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-03 08:39:17,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:17,778 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2018-10-03 08:39:17,778 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:17,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:17,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1305899827, now seen corresponding path program 18 times [2018-10-03 08:39:17,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:17,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:17,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:17,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:17,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:17,934 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 73 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:17,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:17,934 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:17,942 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:17,973 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-03 08:39:17,973 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:17,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:17,988 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 73 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:18,010 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:18,011 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-10-03 08:39:18,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-03 08:39:18,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-03 08:39:18,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:39:18,011 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 13 states. [2018-10-03 08:39:18,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:18,473 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2018-10-03 08:39:18,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-03 08:39:18,475 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2018-10-03 08:39:18,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:18,476 INFO L225 Difference]: With dead ends: 70 [2018-10-03 08:39:18,476 INFO L226 Difference]: Without dead ends: 64 [2018-10-03 08:39:18,476 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-10-03 08:39:18,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-03 08:39:18,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2018-10-03 08:39:18,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-03 08:39:18,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2018-10-03 08:39:18,482 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 53 [2018-10-03 08:39:18,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:18,483 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2018-10-03 08:39:18,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-03 08:39:18,483 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2018-10-03 08:39:18,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-03 08:39:18,483 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:18,484 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-10-03 08:39:18,484 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:18,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:18,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1754878403, now seen corresponding path program 19 times [2018-10-03 08:39:18,484 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:18,484 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:18,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:18,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:18,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:18,780 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 220 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:18,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:18,781 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:18,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:18,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:18,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 220 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:18,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:18,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-03 08:39:18,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 08:39:18,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 08:39:18,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:39:18,858 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 24 states. [2018-10-03 08:39:19,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:19,433 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2018-10-03 08:39:19,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 08:39:19,433 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2018-10-03 08:39:19,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:19,434 INFO L225 Difference]: With dead ends: 112 [2018-10-03 08:39:19,434 INFO L226 Difference]: Without dead ends: 61 [2018-10-03 08:39:19,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:39:19,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-03 08:39:19,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-03 08:39:19,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-03 08:39:19,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2018-10-03 08:39:19,446 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 57 [2018-10-03 08:39:19,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:19,446 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2018-10-03 08:39:19,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 08:39:19,446 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2018-10-03 08:39:19,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-03 08:39:19,447 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:19,447 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2018-10-03 08:39:19,447 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:19,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:19,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1471794070, now seen corresponding path program 20 times [2018-10-03 08:39:19,448 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:19,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:19,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:19,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:19,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:19,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:19,623 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 86 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:19,623 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:19,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:19,632 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:19,672 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:19,672 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:19,674 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 86 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:19,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:19,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-10-03 08:39:19,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-03 08:39:19,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-03 08:39:19,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:39:19,715 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 14 states. [2018-10-03 08:39:19,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:19,851 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2018-10-03 08:39:19,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-03 08:39:19,851 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2018-10-03 08:39:19,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:19,852 INFO L225 Difference]: With dead ends: 75 [2018-10-03 08:39:19,852 INFO L226 Difference]: Without dead ends: 69 [2018-10-03 08:39:19,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-10-03 08:39:19,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-03 08:39:19,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2018-10-03 08:39:19,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-03 08:39:19,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-10-03 08:39:19,859 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 58 [2018-10-03 08:39:19,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:19,860 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-10-03 08:39:19,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-03 08:39:19,860 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-10-03 08:39:19,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-03 08:39:19,860 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:19,861 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2018-10-03 08:39:19,861 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:19,861 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:19,861 INFO L82 PathProgramCache]: Analyzing trace with hash 716104416, now seen corresponding path program 21 times [2018-10-03 08:39:19,861 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:19,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:19,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:19,862 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:19,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 264 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:20,481 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:20,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:20,490 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:20,556 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-03 08:39:20,556 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:20,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 264 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:20,600 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:20,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-03 08:39:20,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:39:20,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:39:20,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:39:20,602 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 26 states. [2018-10-03 08:39:20,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:20,985 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2018-10-03 08:39:20,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 08:39:20,985 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2018-10-03 08:39:20,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:20,985 INFO L225 Difference]: With dead ends: 121 [2018-10-03 08:39:20,986 INFO L226 Difference]: Without dead ends: 66 [2018-10-03 08:39:20,986 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:39:20,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-03 08:39:20,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-03 08:39:20,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-03 08:39:20,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-03 08:39:20,993 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2018-10-03 08:39:20,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:20,993 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-03 08:39:20,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:39:20,994 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-03 08:39:20,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-03 08:39:20,994 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:20,994 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 1, 1, 1, 1, 1] [2018-10-03 08:39:20,995 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:20,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:20,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1699180391, now seen corresponding path program 22 times [2018-10-03 08:39:20,995 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:20,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:20,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:20,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:20,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:21,360 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:21,360 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:21,375 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:21,422 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:21,423 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:21,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 100 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:21,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:21,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-03 08:39:21,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-03 08:39:21,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-03 08:39:21,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:39:21,466 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 15 states. [2018-10-03 08:39:21,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:21,553 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2018-10-03 08:39:21,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-03 08:39:21,553 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2018-10-03 08:39:21,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:21,554 INFO L225 Difference]: With dead ends: 80 [2018-10-03 08:39:21,554 INFO L226 Difference]: Without dead ends: 74 [2018-10-03 08:39:21,555 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-10-03 08:39:21,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-10-03 08:39:21,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2018-10-03 08:39:21,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-10-03 08:39:21,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2018-10-03 08:39:21,562 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2018-10-03 08:39:21,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:21,562 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2018-10-03 08:39:21,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-03 08:39:21,562 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2018-10-03 08:39:21,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-03 08:39:21,563 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:21,563 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2018-10-03 08:39:21,563 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:21,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:21,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1490448497, now seen corresponding path program 23 times [2018-10-03 08:39:21,564 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:21,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:21,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:21,565 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:21,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:21,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:22,025 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 312 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:22,025 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:22,026 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:22,040 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:22,088 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-03 08:39:22,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:22,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 312 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:22,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:22,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-03 08:39:22,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 08:39:22,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 08:39:22,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:39:22,125 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 28 states. [2018-10-03 08:39:22,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:22,583 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2018-10-03 08:39:22,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 08:39:22,583 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 67 [2018-10-03 08:39:22,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:22,584 INFO L225 Difference]: With dead ends: 130 [2018-10-03 08:39:22,585 INFO L226 Difference]: Without dead ends: 71 [2018-10-03 08:39:22,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=417, Invalid=1223, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:39:22,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-10-03 08:39:22,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-10-03 08:39:22,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-10-03 08:39:22,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2018-10-03 08:39:22,593 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2018-10-03 08:39:22,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:22,594 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2018-10-03 08:39:22,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 08:39:22,594 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2018-10-03 08:39:22,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-03 08:39:22,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:22,595 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2018-10-03 08:39:22,595 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:22,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:22,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1188334966, now seen corresponding path program 24 times [2018-10-03 08:39:22,595 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:22,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:22,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:22,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:22,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 115 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:22,874 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:22,874 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:22,887 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:22,932 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-03 08:39:22,932 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:22,934 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 115 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:22,964 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:22,964 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-03 08:39:22,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-03 08:39:22,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-03 08:39:22,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:39:22,965 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 16 states. [2018-10-03 08:39:23,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:23,067 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2018-10-03 08:39:23,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-03 08:39:23,067 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 68 [2018-10-03 08:39:23,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:23,068 INFO L225 Difference]: With dead ends: 85 [2018-10-03 08:39:23,069 INFO L226 Difference]: Without dead ends: 79 [2018-10-03 08:39:23,069 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-10-03 08:39:23,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-10-03 08:39:23,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2018-10-03 08:39:23,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-03 08:39:23,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2018-10-03 08:39:23,077 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 68 [2018-10-03 08:39:23,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:23,077 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2018-10-03 08:39:23,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-03 08:39:23,077 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2018-10-03 08:39:23,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-03 08:39:23,078 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:23,078 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2018-10-03 08:39:23,078 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:23,078 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:23,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1190013460, now seen corresponding path program 25 times [2018-10-03 08:39:23,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:23,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:23,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:23,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:23,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 364 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:23,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:23,546 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:23,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:23,594 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 364 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:23,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:23,644 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-03 08:39:23,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 08:39:23,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 08:39:23,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:39:23,645 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 30 states. [2018-10-03 08:39:24,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:24,606 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2018-10-03 08:39:24,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 08:39:24,607 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 72 [2018-10-03 08:39:24,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:24,608 INFO L225 Difference]: With dead ends: 139 [2018-10-03 08:39:24,608 INFO L226 Difference]: Without dead ends: 76 [2018-10-03 08:39:24,609 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=477, Invalid=1415, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:39:24,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-10-03 08:39:24,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2018-10-03 08:39:24,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-10-03 08:39:24,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2018-10-03 08:39:24,618 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 72 [2018-10-03 08:39:24,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:24,619 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2018-10-03 08:39:24,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 08:39:24,619 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2018-10-03 08:39:24,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-03 08:39:24,620 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:24,620 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 1, 1, 1, 1, 1] [2018-10-03 08:39:24,620 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:24,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:24,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1746112411, now seen corresponding path program 26 times [2018-10-03 08:39:24,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:24,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:24,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:24,622 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:24,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 131 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:26,153 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:26,153 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:26,162 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:26,210 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:26,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:26,214 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 131 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:26,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:26,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-10-03 08:39:26,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-03 08:39:26,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-03 08:39:26,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:39:26,253 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 17 states. [2018-10-03 08:39:26,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:26,493 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2018-10-03 08:39:26,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-03 08:39:26,493 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2018-10-03 08:39:26,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:26,494 INFO L225 Difference]: With dead ends: 90 [2018-10-03 08:39:26,494 INFO L226 Difference]: Without dead ends: 84 [2018-10-03 08:39:26,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-10-03 08:39:26,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-10-03 08:39:26,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2018-10-03 08:39:26,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-03 08:39:26,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-10-03 08:39:26,504 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2018-10-03 08:39:26,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:26,504 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-10-03 08:39:26,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-03 08:39:26,504 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-10-03 08:39:26,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-10-03 08:39:26,505 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:26,505 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2018-10-03 08:39:26,505 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:26,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:26,506 INFO L82 PathProgramCache]: Analyzing trace with hash 613460315, now seen corresponding path program 27 times [2018-10-03 08:39:26,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:26,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:26,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:26,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:26,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 420 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:27,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:27,413 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:27,420 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:27,469 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-03 08:39:27,470 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:27,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 420 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:27,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:27,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-03 08:39:27,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 08:39:27,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 08:39:27,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:39:27,515 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 32 states. [2018-10-03 08:39:28,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:28,380 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2018-10-03 08:39:28,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 08:39:28,381 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 77 [2018-10-03 08:39:28,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:28,381 INFO L225 Difference]: With dead ends: 148 [2018-10-03 08:39:28,381 INFO L226 Difference]: Without dead ends: 81 [2018-10-03 08:39:28,382 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=541, Invalid=1621, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:39:28,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-10-03 08:39:28,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-10-03 08:39:28,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-10-03 08:39:28,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2018-10-03 08:39:28,388 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 77 [2018-10-03 08:39:28,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:28,388 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2018-10-03 08:39:28,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 08:39:28,388 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2018-10-03 08:39:28,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2018-10-03 08:39:28,389 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:28,389 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2018-10-03 08:39:28,389 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:28,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:28,389 INFO L82 PathProgramCache]: Analyzing trace with hash 381727362, now seen corresponding path program 28 times [2018-10-03 08:39:28,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:28,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:28,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:28,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:28,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:28,568 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 148 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:28,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:28,569 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:28,578 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:28,633 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:28,634 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:28,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 148 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:28,689 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:28,689 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-10-03 08:39:28,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-03 08:39:28,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-03 08:39:28,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:39:28,690 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 18 states. [2018-10-03 08:39:28,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:28,913 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2018-10-03 08:39:28,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-03 08:39:28,914 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2018-10-03 08:39:28,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:28,915 INFO L225 Difference]: With dead ends: 95 [2018-10-03 08:39:28,915 INFO L226 Difference]: Without dead ends: 89 [2018-10-03 08:39:28,916 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-10-03 08:39:28,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-03 08:39:28,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 85. [2018-10-03 08:39:28,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-03 08:39:28,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2018-10-03 08:39:28,924 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 78 [2018-10-03 08:39:28,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:28,924 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2018-10-03 08:39:28,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-03 08:39:28,924 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2018-10-03 08:39:28,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-10-03 08:39:28,925 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:28,925 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2018-10-03 08:39:28,925 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:28,925 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:28,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1123248904, now seen corresponding path program 29 times [2018-10-03 08:39:28,926 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:28,926 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:28,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:28,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:28,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 480 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:30,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:30,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:30,238 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:30,286 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-03 08:39:30,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:30,290 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 480 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:30,323 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:30,324 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-03 08:39:30,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 08:39:30,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 08:39:30,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:39:30,325 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 34 states. [2018-10-03 08:39:31,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:31,237 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2018-10-03 08:39:31,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 08:39:31,237 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 82 [2018-10-03 08:39:31,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:31,238 INFO L225 Difference]: With dead ends: 157 [2018-10-03 08:39:31,238 INFO L226 Difference]: Without dead ends: 86 [2018-10-03 08:39:31,240 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=609, Invalid=1841, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:39:31,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-03 08:39:31,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-10-03 08:39:31,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-10-03 08:39:31,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2018-10-03 08:39:31,249 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 82 [2018-10-03 08:39:31,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:31,249 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2018-10-03 08:39:31,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 08:39:31,250 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2018-10-03 08:39:31,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-03 08:39:31,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:31,250 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 1, 1, 1, 1, 1] [2018-10-03 08:39:31,253 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:31,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:31,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1191652401, now seen corresponding path program 30 times [2018-10-03 08:39:31,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:31,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:31,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:31,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:31,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 166 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:31,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:31,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:31,514 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:31,563 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-03 08:39:31,563 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:31,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:31,580 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 166 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:31,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:31,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-10-03 08:39:31,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-03 08:39:31,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-03 08:39:31,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:39:31,607 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand 19 states. [2018-10-03 08:39:31,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:31,711 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2018-10-03 08:39:31,711 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-03 08:39:31,712 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 83 [2018-10-03 08:39:31,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:31,713 INFO L225 Difference]: With dead ends: 100 [2018-10-03 08:39:31,713 INFO L226 Difference]: Without dead ends: 94 [2018-10-03 08:39:31,713 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-10-03 08:39:31,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-03 08:39:31,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2018-10-03 08:39:31,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-10-03 08:39:31,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2018-10-03 08:39:31,722 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 83 [2018-10-03 08:39:31,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:31,723 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2018-10-03 08:39:31,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-03 08:39:31,723 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2018-10-03 08:39:31,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-10-03 08:39:31,723 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:31,724 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2018-10-03 08:39:31,724 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:31,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:31,724 INFO L82 PathProgramCache]: Analyzing trace with hash 219193127, now seen corresponding path program 31 times [2018-10-03 08:39:31,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:31,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:31,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:31,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:31,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 544 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:33,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:33,176 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:33,198 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:33,246 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 544 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:33,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:33,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-03 08:39:33,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 08:39:33,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 08:39:33,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:39:33,287 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 36 states. [2018-10-03 08:39:33,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:33,908 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2018-10-03 08:39:33,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 08:39:33,908 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 87 [2018-10-03 08:39:33,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:33,909 INFO L225 Difference]: With dead ends: 166 [2018-10-03 08:39:33,910 INFO L226 Difference]: Without dead ends: 91 [2018-10-03 08:39:33,911 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=681, Invalid=2075, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:39:33,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2018-10-03 08:39:33,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2018-10-03 08:39:33,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-03 08:39:33,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-10-03 08:39:33,920 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 87 [2018-10-03 08:39:33,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:33,920 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-10-03 08:39:33,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 08:39:33,920 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-10-03 08:39:33,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2018-10-03 08:39:33,921 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:33,921 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 1, 1, 1, 1, 1] [2018-10-03 08:39:33,921 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:33,922 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:33,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1134517362, now seen corresponding path program 32 times [2018-10-03 08:39:33,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:33,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:33,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:33,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:33,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:33,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 185 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:34,243 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:34,243 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:34,251 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:34,293 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:34,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:34,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:34,310 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 185 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:34,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:34,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-10-03 08:39:34,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-03 08:39:34,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-03 08:39:34,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:39:34,334 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 20 states. [2018-10-03 08:39:34,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:34,464 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2018-10-03 08:39:34,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-03 08:39:34,465 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 88 [2018-10-03 08:39:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:34,465 INFO L225 Difference]: With dead ends: 105 [2018-10-03 08:39:34,465 INFO L226 Difference]: Without dead ends: 99 [2018-10-03 08:39:34,466 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-10-03 08:39:34,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-10-03 08:39:34,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2018-10-03 08:39:34,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2018-10-03 08:39:34,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2018-10-03 08:39:34,473 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 88 [2018-10-03 08:39:34,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:34,474 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2018-10-03 08:39:34,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-03 08:39:34,474 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2018-10-03 08:39:34,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-03 08:39:34,474 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:34,475 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2018-10-03 08:39:34,475 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:34,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:34,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1074454524, now seen corresponding path program 33 times [2018-10-03 08:39:34,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:34,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:34,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:34,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:34,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 612 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:35,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:35,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:35,338 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:35,397 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-03 08:39:35,397 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:35,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 612 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:35,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:35,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-03 08:39:35,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:39:35,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:39:35,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:39:35,435 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 38 states. [2018-10-03 08:39:36,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:36,131 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2018-10-03 08:39:36,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 08:39:36,131 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 92 [2018-10-03 08:39:36,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:36,132 INFO L225 Difference]: With dead ends: 175 [2018-10-03 08:39:36,132 INFO L226 Difference]: Without dead ends: 96 [2018-10-03 08:39:36,133 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=757, Invalid=2323, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:39:36,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-03 08:39:36,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2018-10-03 08:39:36,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2018-10-03 08:39:36,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2018-10-03 08:39:36,140 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 92 [2018-10-03 08:39:36,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:36,140 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2018-10-03 08:39:36,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:39:36,141 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2018-10-03 08:39:36,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-03 08:39:36,141 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:36,141 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2018-10-03 08:39:36,142 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:36,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:36,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1513438211, now seen corresponding path program 34 times [2018-10-03 08:39:36,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:36,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:36,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:36,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:36,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:36,492 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 205 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:36,492 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:36,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:36,499 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:36,542 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:36,542 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:36,545 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 205 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:36,578 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:36,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-10-03 08:39:36,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-03 08:39:36,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-03 08:39:36,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:39:36,580 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 21 states. [2018-10-03 08:39:36,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:36,694 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2018-10-03 08:39:36,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-03 08:39:36,694 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2018-10-03 08:39:36,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:36,695 INFO L225 Difference]: With dead ends: 110 [2018-10-03 08:39:36,696 INFO L226 Difference]: Without dead ends: 104 [2018-10-03 08:39:36,696 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-10-03 08:39:36,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2018-10-03 08:39:36,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2018-10-03 08:39:36,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-10-03 08:39:36,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2018-10-03 08:39:36,705 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 93 [2018-10-03 08:39:36,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:36,705 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2018-10-03 08:39:36,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-03 08:39:36,706 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2018-10-03 08:39:36,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-10-03 08:39:36,706 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:36,706 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 1, 1, 1, 1, 1] [2018-10-03 08:39:36,706 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:36,706 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:36,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1385467661, now seen corresponding path program 35 times [2018-10-03 08:39:36,707 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:36,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:36,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:36,707 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:36,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:36,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 684 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:37,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:37,384 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:37,391 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:37,445 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-03 08:39:37,445 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:37,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:37,465 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 684 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:37,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:37,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-03 08:39:37,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 08:39:37,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 08:39:37,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:39:37,496 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand 40 states. [2018-10-03 08:39:38,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:38,217 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2018-10-03 08:39:38,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 08:39:38,217 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 97 [2018-10-03 08:39:38,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:38,218 INFO L225 Difference]: With dead ends: 184 [2018-10-03 08:39:38,218 INFO L226 Difference]: Without dead ends: 101 [2018-10-03 08:39:38,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2018-10-03 08:39:38,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-03 08:39:38,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-03 08:39:38,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-03 08:39:38,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-10-03 08:39:38,227 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 97 [2018-10-03 08:39:38,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:38,227 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-10-03 08:39:38,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 08:39:38,227 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-10-03 08:39:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2018-10-03 08:39:38,228 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:38,228 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 1, 1, 1, 1, 1] [2018-10-03 08:39:38,228 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:38,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:38,228 INFO L82 PathProgramCache]: Analyzing trace with hash -209035110, now seen corresponding path program 36 times [2018-10-03 08:39:38,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:38,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:38,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:38,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:38,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 226 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:38,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:38,562 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:38,569 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:38,627 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-03 08:39:38,627 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:38,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:38,648 INFO L134 CoverageAnalysis]: Checked inductivity of 874 backedges. 226 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:38,669 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:38,669 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-10-03 08:39:38,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-03 08:39:38,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-03 08:39:38,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:39:38,670 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 22 states. [2018-10-03 08:39:38,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:38,778 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2018-10-03 08:39:38,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-03 08:39:38,779 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 98 [2018-10-03 08:39:38,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:38,779 INFO L225 Difference]: With dead ends: 115 [2018-10-03 08:39:38,779 INFO L226 Difference]: Without dead ends: 109 [2018-10-03 08:39:38,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-10-03 08:39:38,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2018-10-03 08:39:38,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2018-10-03 08:39:38,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-03 08:39:38,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-10-03 08:39:38,788 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 98 [2018-10-03 08:39:38,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:38,788 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-10-03 08:39:38,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-03 08:39:38,789 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-10-03 08:39:38,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-10-03 08:39:38,789 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:38,789 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 1, 1, 1, 1, 1] [2018-10-03 08:39:38,790 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:38,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:38,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1566476528, now seen corresponding path program 37 times [2018-10-03 08:39:38,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:38,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:38,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:38,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:38,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:38,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 760 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:40,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:40,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:40,352 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:40,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:40,415 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 760 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:40,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:40,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-03 08:39:40,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 08:39:40,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 08:39:40,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:39:40,438 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 42 states. [2018-10-03 08:39:41,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:41,271 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2018-10-03 08:39:41,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 08:39:41,272 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 102 [2018-10-03 08:39:41,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:41,273 INFO L225 Difference]: With dead ends: 193 [2018-10-03 08:39:41,273 INFO L226 Difference]: Without dead ends: 106 [2018-10-03 08:39:41,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=921, Invalid=2861, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:39:41,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-03 08:39:41,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2018-10-03 08:39:41,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2018-10-03 08:39:41,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2018-10-03 08:39:41,286 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 102 [2018-10-03 08:39:41,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:41,286 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2018-10-03 08:39:41,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 08:39:41,286 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2018-10-03 08:39:41,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2018-10-03 08:39:41,287 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:41,287 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 1, 1, 1, 1, 1] [2018-10-03 08:39:41,287 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:41,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:41,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1920546761, now seen corresponding path program 38 times [2018-10-03 08:39:41,288 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:41,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:41,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:41,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:41,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:41,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 248 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:41,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:41,736 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:41,743 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:41,792 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:41,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:41,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:41,815 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 248 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:41,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:41,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-10-03 08:39:41,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-03 08:39:41,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-03 08:39:41,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:39:41,843 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 23 states. [2018-10-03 08:39:41,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:41,964 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2018-10-03 08:39:41,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-03 08:39:41,965 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 103 [2018-10-03 08:39:41,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:41,966 INFO L225 Difference]: With dead ends: 120 [2018-10-03 08:39:41,966 INFO L226 Difference]: Without dead ends: 114 [2018-10-03 08:39:41,967 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-10-03 08:39:41,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-03 08:39:41,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2018-10-03 08:39:41,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-03 08:39:41,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 112 transitions. [2018-10-03 08:39:41,978 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 112 transitions. Word has length 103 [2018-10-03 08:39:41,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:41,978 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 112 transitions. [2018-10-03 08:39:41,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-03 08:39:41,979 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 112 transitions. [2018-10-03 08:39:41,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-03 08:39:41,979 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:41,979 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 1, 1, 1, 1, 1] [2018-10-03 08:39:41,980 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:41,980 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:41,980 INFO L82 PathProgramCache]: Analyzing trace with hash -756867393, now seen corresponding path program 39 times [2018-10-03 08:39:41,980 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:41,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:41,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:41,981 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:41,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 840 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:43,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:43,318 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:43,326 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:43,393 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-03 08:39:43,393 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:43,398 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 840 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:43,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:43,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-03 08:39:43,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 08:39:43,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 08:39:43,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1387, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:39:43,465 INFO L87 Difference]: Start difference. First operand 110 states and 112 transitions. Second operand 44 states. [2018-10-03 08:39:45,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:45,929 INFO L93 Difference]: Finished difference Result 202 states and 206 transitions. [2018-10-03 08:39:45,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 08:39:45,930 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 107 [2018-10-03 08:39:45,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:45,931 INFO L225 Difference]: With dead ends: 202 [2018-10-03 08:39:45,931 INFO L226 Difference]: Without dead ends: 111 [2018-10-03 08:39:45,932 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1009, Invalid=3151, Unknown=0, NotChecked=0, Total=4160 [2018-10-03 08:39:45,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-10-03 08:39:45,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2018-10-03 08:39:45,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-10-03 08:39:45,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2018-10-03 08:39:45,943 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 107 [2018-10-03 08:39:45,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:45,943 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2018-10-03 08:39:45,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 08:39:45,944 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2018-10-03 08:39:45,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2018-10-03 08:39:45,944 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:45,944 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 1, 1, 1, 1, 1] [2018-10-03 08:39:45,945 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:45,945 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:45,945 INFO L82 PathProgramCache]: Analyzing trace with hash 798222758, now seen corresponding path program 40 times [2018-10-03 08:39:45,945 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:45,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:45,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:45,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:45,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:46,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 271 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:46,590 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:46,590 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:46,597 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:46,644 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:46,644 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:46,647 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1071 backedges. 271 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:46,687 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:46,687 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-10-03 08:39:46,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-03 08:39:46,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-03 08:39:46,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:39:46,688 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 24 states. [2018-10-03 08:39:46,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:46,813 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2018-10-03 08:39:46,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-03 08:39:46,814 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 108 [2018-10-03 08:39:46,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:46,814 INFO L225 Difference]: With dead ends: 125 [2018-10-03 08:39:46,815 INFO L226 Difference]: Without dead ends: 119 [2018-10-03 08:39:46,815 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-10-03 08:39:46,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2018-10-03 08:39:46,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2018-10-03 08:39:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-03 08:39:46,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-10-03 08:39:46,825 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 108 [2018-10-03 08:39:46,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:46,825 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-10-03 08:39:46,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-03 08:39:46,825 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-10-03 08:39:46,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-10-03 08:39:46,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:46,826 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 1, 1, 1, 1, 1] [2018-10-03 08:39:46,826 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:46,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:46,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1030199836, now seen corresponding path program 41 times [2018-10-03 08:39:46,827 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:46,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:46,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:46,828 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:46,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:46,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 924 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:47,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:47,542 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:47,550 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:47,616 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-03 08:39:47,616 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:47,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 924 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:47,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:47,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-03 08:39:47,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 08:39:47,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 08:39:47,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:39:47,662 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 46 states. [2018-10-03 08:39:48,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:48,730 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2018-10-03 08:39:48,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 08:39:48,730 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 112 [2018-10-03 08:39:48,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:48,731 INFO L225 Difference]: With dead ends: 211 [2018-10-03 08:39:48,731 INFO L226 Difference]: Without dead ends: 116 [2018-10-03 08:39:48,733 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1101, Invalid=3455, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:39:48,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2018-10-03 08:39:48,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2018-10-03 08:39:48,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-10-03 08:39:48,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2018-10-03 08:39:48,745 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 112 [2018-10-03 08:39:48,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:48,745 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2018-10-03 08:39:48,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 08:39:48,745 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2018-10-03 08:39:48,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-10-03 08:39:48,746 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:48,746 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 1, 1, 1, 1, 1] [2018-10-03 08:39:48,746 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:48,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:48,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1949005931, now seen corresponding path program 42 times [2018-10-03 08:39:48,747 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:48,747 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:48,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:48,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:48,748 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 295 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:50,139 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:50,139 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:50,145 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:39:50,240 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-03 08:39:50,240 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:50,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:50,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 295 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:50,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:50,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-10-03 08:39:50,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-03 08:39:50,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-03 08:39:50,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:39:50,282 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 25 states. [2018-10-03 08:39:50,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:50,498 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2018-10-03 08:39:50,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-03 08:39:50,498 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 113 [2018-10-03 08:39:50,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:50,499 INFO L225 Difference]: With dead ends: 130 [2018-10-03 08:39:50,499 INFO L226 Difference]: Without dead ends: 124 [2018-10-03 08:39:50,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-10-03 08:39:50,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-03 08:39:50,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2018-10-03 08:39:50,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-10-03 08:39:50,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2018-10-03 08:39:50,512 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 113 [2018-10-03 08:39:50,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:50,512 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2018-10-03 08:39:50,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-03 08:39:50,513 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2018-10-03 08:39:50,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-10-03 08:39:50,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:50,513 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1] [2018-10-03 08:39:50,513 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:50,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:50,514 INFO L82 PathProgramCache]: Analyzing trace with hash 725198987, now seen corresponding path program 43 times [2018-10-03 08:39:50,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:50,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:50,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:50,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:50,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:51,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 1012 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:51,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:51,873 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:51,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:51,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:51,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 1012 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:51,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:51,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-03 08:39:51,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 08:39:51,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 08:39:51,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:39:51,986 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand 48 states. [2018-10-03 08:39:53,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:53,125 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2018-10-03 08:39:53,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 08:39:53,126 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 117 [2018-10-03 08:39:53,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:53,126 INFO L225 Difference]: With dead ends: 220 [2018-10-03 08:39:53,127 INFO L226 Difference]: Without dead ends: 121 [2018-10-03 08:39:53,127 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1197, Invalid=3773, Unknown=0, NotChecked=0, Total=4970 [2018-10-03 08:39:53,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2018-10-03 08:39:53,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2018-10-03 08:39:53,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-10-03 08:39:53,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2018-10-03 08:39:53,139 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 117 [2018-10-03 08:39:53,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:53,140 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2018-10-03 08:39:53,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 08:39:53,140 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2018-10-03 08:39:53,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-03 08:39:53,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:53,141 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2018-10-03 08:39:53,141 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:53,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:53,141 INFO L82 PathProgramCache]: Analyzing trace with hash 995311282, now seen corresponding path program 44 times [2018-10-03 08:39:53,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:53,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:53,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:53,142 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:39:53,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 320 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:53,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:53,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:53,482 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:39:53,535 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:39:53,535 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:53,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 320 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:53,581 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:53,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-10-03 08:39:53,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-03 08:39:53,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-03 08:39:53,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:39:53,583 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 26 states. [2018-10-03 08:39:53,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:53,713 INFO L93 Difference]: Finished difference Result 135 states and 138 transitions. [2018-10-03 08:39:53,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-03 08:39:53,713 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2018-10-03 08:39:53,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:53,714 INFO L225 Difference]: With dead ends: 135 [2018-10-03 08:39:53,714 INFO L226 Difference]: Without dead ends: 129 [2018-10-03 08:39:53,714 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-10-03 08:39:53,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2018-10-03 08:39:53,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2018-10-03 08:39:53,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-03 08:39:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2018-10-03 08:39:53,725 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 118 [2018-10-03 08:39:53,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:53,725 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2018-10-03 08:39:53,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-03 08:39:53,726 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2018-10-03 08:39:53,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-10-03 08:39:53,726 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:53,726 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 1, 1, 1, 1, 1] [2018-10-03 08:39:53,727 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:53,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:53,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1935656, now seen corresponding path program 45 times [2018-10-03 08:39:53,727 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:53,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:53,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:53,728 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:53,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:53,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 1104 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:54,610 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:54,610 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:54,618 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:39:54,700 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-03 08:39:54,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:54,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 1104 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:54,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:54,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-03 08:39:54,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:39:54,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:39:54,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:39:54,753 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 50 states. [2018-10-03 08:39:56,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:56,289 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2018-10-03 08:39:56,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 08:39:56,289 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 122 [2018-10-03 08:39:56,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:56,290 INFO L225 Difference]: With dead ends: 229 [2018-10-03 08:39:56,290 INFO L226 Difference]: Without dead ends: 126 [2018-10-03 08:39:56,291 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1297, Invalid=4105, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:39:56,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2018-10-03 08:39:56,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2018-10-03 08:39:56,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2018-10-03 08:39:56,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2018-10-03 08:39:56,305 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 122 [2018-10-03 08:39:56,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:56,305 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2018-10-03 08:39:56,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:39:56,305 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2018-10-03 08:39:56,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-10-03 08:39:56,306 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:56,306 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 1, 1, 1, 1, 1] [2018-10-03 08:39:56,307 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:56,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:56,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1360966497, now seen corresponding path program 46 times [2018-10-03 08:39:56,307 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:56,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:56,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:56,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:56,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 346 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:57,187 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:57,187 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:57,211 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:39:57,269 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:39:57,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:57,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 346 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:57,321 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:57,321 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-10-03 08:39:57,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-03 08:39:57,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-03 08:39:57,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:39:57,322 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand 27 states. [2018-10-03 08:39:57,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:57,464 INFO L93 Difference]: Finished difference Result 140 states and 143 transitions. [2018-10-03 08:39:57,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-03 08:39:57,464 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 123 [2018-10-03 08:39:57,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:57,465 INFO L225 Difference]: With dead ends: 140 [2018-10-03 08:39:57,465 INFO L226 Difference]: Without dead ends: 134 [2018-10-03 08:39:57,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-10-03 08:39:57,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2018-10-03 08:39:57,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2018-10-03 08:39:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2018-10-03 08:39:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2018-10-03 08:39:57,475 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 123 [2018-10-03 08:39:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:57,476 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2018-10-03 08:39:57,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-03 08:39:57,476 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2018-10-03 08:39:57,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-10-03 08:39:57,476 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:57,476 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 1, 1, 1, 1, 1] [2018-10-03 08:39:57,477 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:57,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:57,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1531900329, now seen corresponding path program 47 times [2018-10-03 08:39:57,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:57,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:57,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:57,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:57,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:39:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 1200 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:58,443 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:39:58,443 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:39:58,451 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:39:58,527 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-03 08:39:58,527 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:39:58,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:39:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 1200 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:39:58,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:39:58,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-03 08:39:58,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 08:39:58,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 08:39:58,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=1951, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:39:58,572 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand 52 states. [2018-10-03 08:39:59,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:39:59,837 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2018-10-03 08:39:59,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 08:39:59,837 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 127 [2018-10-03 08:39:59,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:39:59,839 INFO L225 Difference]: With dead ends: 238 [2018-10-03 08:39:59,839 INFO L226 Difference]: Without dead ends: 131 [2018-10-03 08:39:59,840 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1401, Invalid=4451, Unknown=0, NotChecked=0, Total=5852 [2018-10-03 08:39:59,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-03 08:39:59,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2018-10-03 08:39:59,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2018-10-03 08:39:59,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2018-10-03 08:39:59,851 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 127 [2018-10-03 08:39:59,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:39:59,851 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2018-10-03 08:39:59,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 08:39:59,851 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2018-10-03 08:39:59,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-03 08:39:59,852 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:39:59,852 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 1, 1, 1, 1, 1] [2018-10-03 08:39:59,852 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:39:59,852 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:39:59,853 INFO L82 PathProgramCache]: Analyzing trace with hash -652320834, now seen corresponding path program 48 times [2018-10-03 08:39:59,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:39:59,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:39:59,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:59,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:39:59,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:39:59,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 373 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:00,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:00,586 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:00,593 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:00,673 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-03 08:40:00,673 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:00,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 373 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:00,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:00,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-10-03 08:40:00,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-03 08:40:00,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-03 08:40:00,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:40:00,736 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 28 states. [2018-10-03 08:40:00,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:00,921 INFO L93 Difference]: Finished difference Result 145 states and 148 transitions. [2018-10-03 08:40:00,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-03 08:40:00,921 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 128 [2018-10-03 08:40:00,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:00,922 INFO L225 Difference]: With dead ends: 145 [2018-10-03 08:40:00,922 INFO L226 Difference]: Without dead ends: 139 [2018-10-03 08:40:00,922 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-10-03 08:40:00,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2018-10-03 08:40:00,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2018-10-03 08:40:00,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2018-10-03 08:40:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2018-10-03 08:40:00,933 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 128 [2018-10-03 08:40:00,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:00,933 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2018-10-03 08:40:00,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-03 08:40:00,933 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2018-10-03 08:40:00,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-03 08:40:00,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:00,934 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 1, 1, 1, 1, 1] [2018-10-03 08:40:00,934 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:00,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:00,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1843837900, now seen corresponding path program 49 times [2018-10-03 08:40:00,934 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:00,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:00,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:00,935 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:00,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1300 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:02,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:02,926 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:02,951 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:03,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:03,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:03,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 1300 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:03,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:03,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-03 08:40:03,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 08:40:03,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 08:40:03,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:40:03,079 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 54 states. [2018-10-03 08:40:04,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:04,569 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2018-10-03 08:40:04,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 08:40:04,569 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 132 [2018-10-03 08:40:04,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:04,570 INFO L225 Difference]: With dead ends: 247 [2018-10-03 08:40:04,570 INFO L226 Difference]: Without dead ends: 136 [2018-10-03 08:40:04,571 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1509, Invalid=4811, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:40:04,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2018-10-03 08:40:04,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2018-10-03 08:40:04,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-03 08:40:04,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-10-03 08:40:04,585 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 132 [2018-10-03 08:40:04,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:04,585 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-10-03 08:40:04,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 08:40:04,585 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-10-03 08:40:04,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2018-10-03 08:40:04,586 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:04,586 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 1, 1, 1, 1, 1] [2018-10-03 08:40:04,586 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:04,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:04,587 INFO L82 PathProgramCache]: Analyzing trace with hash 35240749, now seen corresponding path program 50 times [2018-10-03 08:40:04,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:04,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:04,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:04,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:04,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:05,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 401 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:05,583 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:05,583 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:05,594 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:05,654 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:05,655 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:05,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 401 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:05,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:05,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-10-03 08:40:05,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-03 08:40:05,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-03 08:40:05,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:40:05,718 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 29 states. [2018-10-03 08:40:06,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:06,902 INFO L93 Difference]: Finished difference Result 150 states and 153 transitions. [2018-10-03 08:40:06,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-03 08:40:06,902 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 133 [2018-10-03 08:40:06,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:06,903 INFO L225 Difference]: With dead ends: 150 [2018-10-03 08:40:06,904 INFO L226 Difference]: Without dead ends: 144 [2018-10-03 08:40:06,904 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-10-03 08:40:06,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-03 08:40:06,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2018-10-03 08:40:06,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2018-10-03 08:40:06,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 142 transitions. [2018-10-03 08:40:06,920 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 142 transitions. Word has length 133 [2018-10-03 08:40:06,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:06,920 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 142 transitions. [2018-10-03 08:40:06,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-03 08:40:06,920 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 142 transitions. [2018-10-03 08:40:06,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-10-03 08:40:06,921 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:06,921 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 1, 1, 1, 1, 1] [2018-10-03 08:40:06,921 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:06,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:06,921 INFO L82 PathProgramCache]: Analyzing trace with hash -838119389, now seen corresponding path program 51 times [2018-10-03 08:40:06,922 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:06,922 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:06,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:06,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:06,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:06,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 1404 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:09,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:09,683 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:09,691 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:09,777 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-03 08:40:09,777 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:09,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 1404 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:09,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:09,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-10-03 08:40:09,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-03 08:40:09,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-03 08:40:09,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=811, Invalid=2269, Unknown=0, NotChecked=0, Total=3080 [2018-10-03 08:40:09,826 INFO L87 Difference]: Start difference. First operand 140 states and 142 transitions. Second operand 56 states. [2018-10-03 08:40:11,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:11,540 INFO L93 Difference]: Finished difference Result 256 states and 260 transitions. [2018-10-03 08:40:11,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-03 08:40:11,540 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 137 [2018-10-03 08:40:11,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:11,541 INFO L225 Difference]: With dead ends: 256 [2018-10-03 08:40:11,541 INFO L226 Difference]: Without dead ends: 141 [2018-10-03 08:40:11,542 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2018-10-03 08:40:11,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-03 08:40:11,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2018-10-03 08:40:11,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2018-10-03 08:40:11,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2018-10-03 08:40:11,563 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 137 [2018-10-03 08:40:11,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:11,563 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2018-10-03 08:40:11,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-03 08:40:11,563 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2018-10-03 08:40:11,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2018-10-03 08:40:11,564 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:11,564 INFO L375 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 1, 1, 1, 1, 1] [2018-10-03 08:40:11,565 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:11,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:11,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1657490634, now seen corresponding path program 52 times [2018-10-03 08:40:11,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:11,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:11,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:11,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:11,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 430 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:11,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:11,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:11,994 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:12,055 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:12,056 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:12,061 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:12,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1782 backedges. 430 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:12,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:12,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-10-03 08:40:12,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-03 08:40:12,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-03 08:40:12,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:40:12,110 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 30 states. [2018-10-03 08:40:12,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:12,268 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2018-10-03 08:40:12,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-03 08:40:12,268 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 138 [2018-10-03 08:40:12,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:12,269 INFO L225 Difference]: With dead ends: 155 [2018-10-03 08:40:12,269 INFO L226 Difference]: Without dead ends: 149 [2018-10-03 08:40:12,269 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-10-03 08:40:12,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2018-10-03 08:40:12,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2018-10-03 08:40:12,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2018-10-03 08:40:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2018-10-03 08:40:12,285 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 138 [2018-10-03 08:40:12,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:12,285 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2018-10-03 08:40:12,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-03 08:40:12,285 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2018-10-03 08:40:12,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-03 08:40:12,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:12,286 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 1, 1, 1, 1, 1] [2018-10-03 08:40:12,286 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:12,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:12,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1915800384, now seen corresponding path program 53 times [2018-10-03 08:40:12,287 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:12,287 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:12,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:12,288 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:12,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1512 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:13,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:13,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:13,282 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:13,370 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-03 08:40:13,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:13,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1512 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:13,438 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:13,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-10-03 08:40:13,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-03 08:40:13,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-03 08:40:13,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=2437, Unknown=0, NotChecked=0, Total=3306 [2018-10-03 08:40:13,440 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand 58 states. [2018-10-03 08:40:15,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:15,110 INFO L93 Difference]: Finished difference Result 265 states and 269 transitions. [2018-10-03 08:40:15,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-03 08:40:15,110 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 142 [2018-10-03 08:40:15,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:15,111 INFO L225 Difference]: With dead ends: 265 [2018-10-03 08:40:15,111 INFO L226 Difference]: Without dead ends: 146 [2018-10-03 08:40:15,112 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1737, Invalid=5573, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:40:15,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-03 08:40:15,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2018-10-03 08:40:15,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-03 08:40:15,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2018-10-03 08:40:15,124 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 142 [2018-10-03 08:40:15,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:15,125 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2018-10-03 08:40:15,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-03 08:40:15,125 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2018-10-03 08:40:15,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2018-10-03 08:40:15,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:15,126 INFO L375 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 1, 1, 1, 1, 1] [2018-10-03 08:40:15,126 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:15,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:15,126 INFO L82 PathProgramCache]: Analyzing trace with hash 520593145, now seen corresponding path program 54 times [2018-10-03 08:40:15,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:15,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:15,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:15,127 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:15,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:15,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:15,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 460 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:15,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:15,921 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:15,930 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:16,019 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-03 08:40:16,019 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:16,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1918 backedges. 460 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:16,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:16,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-10-03 08:40:16,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-03 08:40:16,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-03 08:40:16,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:40:16,090 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 31 states. [2018-10-03 08:40:16,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:16,439 INFO L93 Difference]: Finished difference Result 160 states and 163 transitions. [2018-10-03 08:40:16,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-03 08:40:16,440 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 143 [2018-10-03 08:40:16,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:16,440 INFO L225 Difference]: With dead ends: 160 [2018-10-03 08:40:16,440 INFO L226 Difference]: Without dead ends: 154 [2018-10-03 08:40:16,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-10-03 08:40:16,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2018-10-03 08:40:16,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2018-10-03 08:40:16,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-03 08:40:16,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2018-10-03 08:40:16,452 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 143 [2018-10-03 08:40:16,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:16,452 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2018-10-03 08:40:16,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-03 08:40:16,453 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2018-10-03 08:40:16,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-10-03 08:40:16,453 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:16,453 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 1, 1, 1, 1, 1] [2018-10-03 08:40:16,453 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:16,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:16,454 INFO L82 PathProgramCache]: Analyzing trace with hash 915041775, now seen corresponding path program 55 times [2018-10-03 08:40:16,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:16,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:16,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:16,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:16,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1624 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:17,455 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:17,455 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:17,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:17,538 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 1624 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:17,606 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:17,606 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-10-03 08:40:17,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-03 08:40:17,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-03 08:40:17,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2018-10-03 08:40:17,608 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 60 states. [2018-10-03 08:40:19,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:19,815 INFO L93 Difference]: Finished difference Result 274 states and 278 transitions. [2018-10-03 08:40:19,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-03 08:40:19,815 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 147 [2018-10-03 08:40:19,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:19,816 INFO L225 Difference]: With dead ends: 274 [2018-10-03 08:40:19,816 INFO L226 Difference]: Without dead ends: 151 [2018-10-03 08:40:19,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1857, Invalid=5975, Unknown=0, NotChecked=0, Total=7832 [2018-10-03 08:40:19,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2018-10-03 08:40:19,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2018-10-03 08:40:19,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2018-10-03 08:40:19,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2018-10-03 08:40:19,830 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 147 [2018-10-03 08:40:19,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:19,830 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2018-10-03 08:40:19,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-03 08:40:19,830 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2018-10-03 08:40:19,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-03 08:40:19,831 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:19,831 INFO L375 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 1, 1, 1, 1, 1] [2018-10-03 08:40:19,831 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:19,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:19,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1773143510, now seen corresponding path program 56 times [2018-10-03 08:40:19,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:19,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:19,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:19,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:19,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:20,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 491 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:20,288 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:20,288 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:20,296 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:20,366 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:20,367 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:20,370 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2059 backedges. 491 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:20,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:20,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-10-03 08:40:20,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-03 08:40:20,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-03 08:40:20,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:40:20,415 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 32 states. [2018-10-03 08:40:20,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:20,638 INFO L93 Difference]: Finished difference Result 165 states and 168 transitions. [2018-10-03 08:40:20,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-03 08:40:20,638 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 148 [2018-10-03 08:40:20,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:20,639 INFO L225 Difference]: With dead ends: 165 [2018-10-03 08:40:20,639 INFO L226 Difference]: Without dead ends: 159 [2018-10-03 08:40:20,640 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-10-03 08:40:20,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-03 08:40:20,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-10-03 08:40:20,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-03 08:40:20,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2018-10-03 08:40:20,656 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 148 [2018-10-03 08:40:20,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:20,657 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2018-10-03 08:40:20,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-03 08:40:20,657 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2018-10-03 08:40:20,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-10-03 08:40:20,658 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:20,658 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 1, 1, 1, 1, 1] [2018-10-03 08:40:20,658 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:20,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:20,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1766187444, now seen corresponding path program 57 times [2018-10-03 08:40:20,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:20,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:20,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:20,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:20,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 1740 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:21,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:21,970 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:21,977 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:22,075 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-03 08:40:22,076 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:22,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 1740 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:22,143 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:22,143 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-10-03 08:40:22,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-03 08:40:22,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-03 08:40:22,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-10-03 08:40:22,145 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 62 states. [2018-10-03 08:40:23,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:23,217 INFO L93 Difference]: Finished difference Result 283 states and 287 transitions. [2018-10-03 08:40:23,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-03 08:40:23,217 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 152 [2018-10-03 08:40:23,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:23,218 INFO L225 Difference]: With dead ends: 283 [2018-10-03 08:40:23,218 INFO L226 Difference]: Without dead ends: 156 [2018-10-03 08:40:23,218 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1981, Invalid=6391, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:40:23,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2018-10-03 08:40:23,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2018-10-03 08:40:23,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2018-10-03 08:40:23,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2018-10-03 08:40:23,231 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 152 [2018-10-03 08:40:23,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:23,231 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2018-10-03 08:40:23,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-03 08:40:23,231 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2018-10-03 08:40:23,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2018-10-03 08:40:23,232 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:23,232 INFO L375 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 1, 1, 1, 1, 1] [2018-10-03 08:40:23,233 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:23,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:23,233 INFO L82 PathProgramCache]: Analyzing trace with hash -928358715, now seen corresponding path program 58 times [2018-10-03 08:40:23,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:23,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:23,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:23,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:23,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 523 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:23,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:23,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:23,691 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:23,764 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:23,764 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:23,770 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 523 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:23,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:23,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-10-03 08:40:23,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-03 08:40:23,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-03 08:40:23,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:40:23,825 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand 33 states. [2018-10-03 08:40:24,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:24,058 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2018-10-03 08:40:24,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-03 08:40:24,058 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 153 [2018-10-03 08:40:24,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:24,059 INFO L225 Difference]: With dead ends: 170 [2018-10-03 08:40:24,059 INFO L226 Difference]: Without dead ends: 164 [2018-10-03 08:40:24,059 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-10-03 08:40:24,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2018-10-03 08:40:24,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2018-10-03 08:40:24,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-10-03 08:40:24,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2018-10-03 08:40:24,078 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 153 [2018-10-03 08:40:24,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:24,078 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2018-10-03 08:40:24,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-03 08:40:24,078 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2018-10-03 08:40:24,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-10-03 08:40:24,079 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:24,079 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 1, 1, 1, 1, 1] [2018-10-03 08:40:24,079 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:24,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:24,080 INFO L82 PathProgramCache]: Analyzing trace with hash -839882821, now seen corresponding path program 59 times [2018-10-03 08:40:24,080 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:24,080 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:24,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:24,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:24,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 1860 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:25,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:25,199 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:25,206 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:25,300 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-03 08:40:25,301 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:25,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 1860 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:25,361 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:25,362 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-10-03 08:40:25,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-03 08:40:25,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-03 08:40:25,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2018-10-03 08:40:25,363 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 64 states. [2018-10-03 08:40:27,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:27,495 INFO L93 Difference]: Finished difference Result 292 states and 296 transitions. [2018-10-03 08:40:27,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-03 08:40:27,495 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 157 [2018-10-03 08:40:27,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:27,496 INFO L225 Difference]: With dead ends: 292 [2018-10-03 08:40:27,496 INFO L226 Difference]: Without dead ends: 161 [2018-10-03 08:40:27,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2109, Invalid=6821, Unknown=0, NotChecked=0, Total=8930 [2018-10-03 08:40:27,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2018-10-03 08:40:27,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2018-10-03 08:40:27,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-03 08:40:27,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-10-03 08:40:27,515 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 157 [2018-10-03 08:40:27,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:27,515 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-10-03 08:40:27,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-03 08:40:27,515 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-10-03 08:40:27,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2018-10-03 08:40:27,516 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:27,516 INFO L375 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 1, 1, 1, 1, 1] [2018-10-03 08:40:27,517 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:27,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:27,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1453492962, now seen corresponding path program 60 times [2018-10-03 08:40:27,517 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:27,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:27,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:27,518 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:27,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 556 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:28,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:28,020 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:28,036 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:28,192 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-03 08:40:28,192 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:28,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2356 backedges. 556 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:28,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:28,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-10-03 08:40:28,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-03 08:40:28,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-03 08:40:28,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:40:28,254 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 34 states. [2018-10-03 08:40:28,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:28,437 INFO L93 Difference]: Finished difference Result 175 states and 178 transitions. [2018-10-03 08:40:28,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-03 08:40:28,437 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 158 [2018-10-03 08:40:28,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:28,438 INFO L225 Difference]: With dead ends: 175 [2018-10-03 08:40:28,438 INFO L226 Difference]: Without dead ends: 169 [2018-10-03 08:40:28,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-10-03 08:40:28,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2018-10-03 08:40:28,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 165. [2018-10-03 08:40:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2018-10-03 08:40:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2018-10-03 08:40:28,454 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 158 [2018-10-03 08:40:28,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:28,454 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2018-10-03 08:40:28,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-03 08:40:28,454 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2018-10-03 08:40:28,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-10-03 08:40:28,455 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:28,455 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 1, 1, 1, 1, 1] [2018-10-03 08:40:28,456 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:28,456 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:28,456 INFO L82 PathProgramCache]: Analyzing trace with hash 227229016, now seen corresponding path program 61 times [2018-10-03 08:40:28,456 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:28,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:28,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:28,457 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:28,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 1984 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:29,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:29,711 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:29,719 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:29,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 1984 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:29,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:29,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-10-03 08:40:29,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-03 08:40:29,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-03 08:40:29,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1121, Invalid=3169, Unknown=0, NotChecked=0, Total=4290 [2018-10-03 08:40:29,855 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 66 states. [2018-10-03 08:40:32,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:32,055 INFO L93 Difference]: Finished difference Result 301 states and 305 transitions. [2018-10-03 08:40:32,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-03 08:40:32,055 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 162 [2018-10-03 08:40:32,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:32,056 INFO L225 Difference]: With dead ends: 301 [2018-10-03 08:40:32,056 INFO L226 Difference]: Without dead ends: 166 [2018-10-03 08:40:32,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2241, Invalid=7265, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:40:32,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-03 08:40:32,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2018-10-03 08:40:32,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2018-10-03 08:40:32,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2018-10-03 08:40:32,075 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 162 [2018-10-03 08:40:32,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:32,075 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2018-10-03 08:40:32,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-03 08:40:32,075 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2018-10-03 08:40:32,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-03 08:40:32,076 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:32,076 INFO L375 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 1, 1, 1, 1, 1] [2018-10-03 08:40:32,076 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:32,077 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:32,077 INFO L82 PathProgramCache]: Analyzing trace with hash 541325969, now seen corresponding path program 62 times [2018-10-03 08:40:32,077 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:32,077 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:32,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:32,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:32,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 590 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:32,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:32,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:32,629 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:32,702 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:32,703 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:32,706 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:32,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2512 backedges. 590 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:32,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:32,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-10-03 08:40:32,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-03 08:40:32,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-03 08:40:32,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:40:32,757 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand 35 states. [2018-10-03 08:40:32,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:32,943 INFO L93 Difference]: Finished difference Result 180 states and 183 transitions. [2018-10-03 08:40:32,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-03 08:40:32,943 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 163 [2018-10-03 08:40:32,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:32,944 INFO L225 Difference]: With dead ends: 180 [2018-10-03 08:40:32,944 INFO L226 Difference]: Without dead ends: 174 [2018-10-03 08:40:32,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-10-03 08:40:32,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2018-10-03 08:40:32,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2018-10-03 08:40:32,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2018-10-03 08:40:32,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2018-10-03 08:40:32,961 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 163 [2018-10-03 08:40:32,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:32,961 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2018-10-03 08:40:32,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-03 08:40:32,962 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2018-10-03 08:40:32,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-03 08:40:32,963 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:32,963 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 1, 1, 1, 1, 1] [2018-10-03 08:40:32,963 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:32,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:32,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1149189511, now seen corresponding path program 63 times [2018-10-03 08:40:32,963 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:32,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:32,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:32,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:32,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 2112 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:34,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:34,399 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:34,407 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:34,523 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-03 08:40:34,523 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:34,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:34,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 2112 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:34,576 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:34,576 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-10-03 08:40:34,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-03 08:40:34,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-03 08:40:34,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=3367, Unknown=0, NotChecked=0, Total=4556 [2018-10-03 08:40:34,577 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand 68 states. [2018-10-03 08:40:37,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:37,112 INFO L93 Difference]: Finished difference Result 310 states and 314 transitions. [2018-10-03 08:40:37,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-10-03 08:40:37,112 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 167 [2018-10-03 08:40:37,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:37,113 INFO L225 Difference]: With dead ends: 310 [2018-10-03 08:40:37,113 INFO L226 Difference]: Without dead ends: 171 [2018-10-03 08:40:37,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2377, Invalid=7723, Unknown=0, NotChecked=0, Total=10100 [2018-10-03 08:40:37,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-03 08:40:37,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2018-10-03 08:40:37,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-03 08:40:37,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-10-03 08:40:37,129 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 167 [2018-10-03 08:40:37,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:37,129 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-10-03 08:40:37,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-10-03 08:40:37,129 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-10-03 08:40:37,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2018-10-03 08:40:37,130 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:37,130 INFO L375 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 1, 1, 1, 1, 1] [2018-10-03 08:40:37,130 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:37,130 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:37,130 INFO L82 PathProgramCache]: Analyzing trace with hash 167304174, now seen corresponding path program 64 times [2018-10-03 08:40:37,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:37,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:37,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:37,131 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:37,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 625 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:37,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:37,794 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:37,803 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:37,881 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:37,881 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:37,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2673 backedges. 625 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:37,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:37,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-10-03 08:40:37,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-03 08:40:37,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-03 08:40:37,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:40:37,944 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 36 states. [2018-10-03 08:40:38,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:38,159 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2018-10-03 08:40:38,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-03 08:40:38,160 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 168 [2018-10-03 08:40:38,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:38,161 INFO L225 Difference]: With dead ends: 185 [2018-10-03 08:40:38,161 INFO L226 Difference]: Without dead ends: 179 [2018-10-03 08:40:38,161 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-10-03 08:40:38,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2018-10-03 08:40:38,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2018-10-03 08:40:38,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-03 08:40:38,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-10-03 08:40:38,181 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 168 [2018-10-03 08:40:38,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:38,182 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-10-03 08:40:38,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-03 08:40:38,182 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-10-03 08:40:38,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-03 08:40:38,183 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:38,183 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 1, 1, 1, 1, 1] [2018-10-03 08:40:38,183 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:38,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:38,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1678104476, now seen corresponding path program 65 times [2018-10-03 08:40:38,183 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:38,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:38,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:38,184 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:38,184 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 2244 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:39,555 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:39,555 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:39,562 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:39,665 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2018-10-03 08:40:39,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:39,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 2244 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:39,744 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:39,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-10-03 08:40:39,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-10-03 08:40:39,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-10-03 08:40:39,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1259, Invalid=3571, Unknown=0, NotChecked=0, Total=4830 [2018-10-03 08:40:39,746 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 70 states. [2018-10-03 08:40:42,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:42,307 INFO L93 Difference]: Finished difference Result 319 states and 323 transitions. [2018-10-03 08:40:42,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-10-03 08:40:42,307 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 172 [2018-10-03 08:40:42,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:42,308 INFO L225 Difference]: With dead ends: 319 [2018-10-03 08:40:42,308 INFO L226 Difference]: Without dead ends: 176 [2018-10-03 08:40:42,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2517, Invalid=8195, Unknown=0, NotChecked=0, Total=10712 [2018-10-03 08:40:42,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2018-10-03 08:40:42,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2018-10-03 08:40:42,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2018-10-03 08:40:42,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2018-10-03 08:40:42,329 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 172 [2018-10-03 08:40:42,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:42,330 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2018-10-03 08:40:42,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-10-03 08:40:42,330 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2018-10-03 08:40:42,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2018-10-03 08:40:42,330 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:42,331 INFO L375 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 1, 1, 1, 1, 1] [2018-10-03 08:40:42,331 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:42,331 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:42,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1483312547, now seen corresponding path program 66 times [2018-10-03 08:40:42,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:42,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:42,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:42,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:42,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 661 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:43,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:43,029 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:43,037 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:40:43,145 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2018-10-03 08:40:43,145 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:43,149 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2839 backedges. 661 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:43,199 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:43,199 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-10-03 08:40:43,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-03 08:40:43,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-03 08:40:43,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:40:43,200 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand 37 states. [2018-10-03 08:40:43,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:43,396 INFO L93 Difference]: Finished difference Result 190 states and 193 transitions. [2018-10-03 08:40:43,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-03 08:40:43,397 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 173 [2018-10-03 08:40:43,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:43,398 INFO L225 Difference]: With dead ends: 190 [2018-10-03 08:40:43,398 INFO L226 Difference]: Without dead ends: 184 [2018-10-03 08:40:43,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-10-03 08:40:43,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2018-10-03 08:40:43,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2018-10-03 08:40:43,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2018-10-03 08:40:43,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 182 transitions. [2018-10-03 08:40:43,415 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 182 transitions. Word has length 173 [2018-10-03 08:40:43,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:43,415 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 182 transitions. [2018-10-03 08:40:43,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-03 08:40:43,415 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 182 transitions. [2018-10-03 08:40:43,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-03 08:40:43,416 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:43,416 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 1, 1, 1, 1, 1] [2018-10-03 08:40:43,416 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:43,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:43,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1794699091, now seen corresponding path program 67 times [2018-10-03 08:40:43,417 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:43,417 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:43,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:43,417 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:43,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:43,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 2380 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:44,859 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:44,859 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:44,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:44,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 2380 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:45,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:45,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-10-03 08:40:45,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-10-03 08:40:45,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-10-03 08:40:45,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=3781, Unknown=0, NotChecked=0, Total=5112 [2018-10-03 08:40:45,005 INFO L87 Difference]: Start difference. First operand 180 states and 182 transitions. Second operand 72 states. [2018-10-03 08:40:47,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:47,722 INFO L93 Difference]: Finished difference Result 328 states and 332 transitions. [2018-10-03 08:40:47,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-03 08:40:47,722 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 177 [2018-10-03 08:40:47,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:47,723 INFO L225 Difference]: With dead ends: 328 [2018-10-03 08:40:47,723 INFO L226 Difference]: Without dead ends: 181 [2018-10-03 08:40:47,724 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1751 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2661, Invalid=8681, Unknown=0, NotChecked=0, Total=11342 [2018-10-03 08:40:47,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2018-10-03 08:40:47,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2018-10-03 08:40:47,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-10-03 08:40:47,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2018-10-03 08:40:47,740 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 177 [2018-10-03 08:40:47,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:47,740 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2018-10-03 08:40:47,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-10-03 08:40:47,741 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2018-10-03 08:40:47,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2018-10-03 08:40:47,741 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:47,742 INFO L375 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 1, 1, 1, 1, 1] [2018-10-03 08:40:47,742 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:47,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:47,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2072574202, now seen corresponding path program 68 times [2018-10-03 08:40:47,742 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:47,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:47,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:47,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:40:47,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 698 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:48,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:48,451 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:48,459 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:40:48,543 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:40:48,543 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:48,546 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:48,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3010 backedges. 698 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:48,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:48,598 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-10-03 08:40:48,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-03 08:40:48,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-03 08:40:48,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:40:48,599 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 38 states. [2018-10-03 08:40:48,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:48,817 INFO L93 Difference]: Finished difference Result 195 states and 198 transitions. [2018-10-03 08:40:48,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-03 08:40:48,817 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 178 [2018-10-03 08:40:48,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:48,818 INFO L225 Difference]: With dead ends: 195 [2018-10-03 08:40:48,818 INFO L226 Difference]: Without dead ends: 189 [2018-10-03 08:40:48,818 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-10-03 08:40:48,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2018-10-03 08:40:48,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2018-10-03 08:40:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-03 08:40:48,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-10-03 08:40:48,834 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 178 [2018-10-03 08:40:48,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:48,835 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-10-03 08:40:48,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-03 08:40:48,835 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-10-03 08:40:48,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-10-03 08:40:48,836 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:48,836 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 1, 1, 1, 1, 1] [2018-10-03 08:40:48,836 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:48,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:48,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1591533424, now seen corresponding path program 69 times [2018-10-03 08:40:48,837 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:48,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:48,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:48,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:48,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:48,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:50,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 2520 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:50,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:50,402 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:50,409 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:40:50,564 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2018-10-03 08:40:50,565 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:50,570 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 2520 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:50,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:50,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-10-03 08:40:50,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-03 08:40:50,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-03 08:40:50,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-10-03 08:40:50,630 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 74 states. [2018-10-03 08:40:53,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:53,509 INFO L93 Difference]: Finished difference Result 337 states and 341 transitions. [2018-10-03 08:40:53,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-10-03 08:40:53,509 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 182 [2018-10-03 08:40:53,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:53,510 INFO L225 Difference]: With dead ends: 337 [2018-10-03 08:40:53,510 INFO L226 Difference]: Without dead ends: 186 [2018-10-03 08:40:53,511 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2809, Invalid=9181, Unknown=0, NotChecked=0, Total=11990 [2018-10-03 08:40:53,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-03 08:40:53,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2018-10-03 08:40:53,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2018-10-03 08:40:53,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2018-10-03 08:40:53,527 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 182 [2018-10-03 08:40:53,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:53,527 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2018-10-03 08:40:53,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-03 08:40:53,527 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2018-10-03 08:40:53,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-10-03 08:40:53,528 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:53,528 INFO L375 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 1, 1, 1, 1, 1] [2018-10-03 08:40:53,528 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:53,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:53,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1595685335, now seen corresponding path program 70 times [2018-10-03 08:40:53,529 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:53,529 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:53,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:53,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:53,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 736 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:54,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:54,250 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:54,258 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:40:54,346 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:40:54,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:54,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3186 backedges. 736 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:54,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:54,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-10-03 08:40:54,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-03 08:40:54,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-03 08:40:54,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:40:54,430 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand 39 states. [2018-10-03 08:40:54,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:54,656 INFO L93 Difference]: Finished difference Result 200 states and 203 transitions. [2018-10-03 08:40:54,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-03 08:40:54,656 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 183 [2018-10-03 08:40:54,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:54,657 INFO L225 Difference]: With dead ends: 200 [2018-10-03 08:40:54,657 INFO L226 Difference]: Without dead ends: 194 [2018-10-03 08:40:54,658 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-10-03 08:40:54,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2018-10-03 08:40:54,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 190. [2018-10-03 08:40:54,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2018-10-03 08:40:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2018-10-03 08:40:54,674 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 183 [2018-10-03 08:40:54,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:54,674 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2018-10-03 08:40:54,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-03 08:40:54,675 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2018-10-03 08:40:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-10-03 08:40:54,675 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:54,675 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 1, 1, 1, 1, 1] [2018-10-03 08:40:54,675 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:54,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:54,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1835041505, now seen corresponding path program 71 times [2018-10-03 08:40:54,676 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:54,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:54,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:54,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:54,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:54,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:40:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 2664 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:56,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:40:56,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:40:56,521 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:40:56,658 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2018-10-03 08:40:56,659 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:40:56,663 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:40:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 2664 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:40:56,733 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:40:56,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-10-03 08:40:56,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-10-03 08:40:56,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-10-03 08:40:56,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1481, Invalid=4219, Unknown=0, NotChecked=0, Total=5700 [2018-10-03 08:40:56,735 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand 76 states. [2018-10-03 08:40:59,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:40:59,547 INFO L93 Difference]: Finished difference Result 346 states and 350 transitions. [2018-10-03 08:40:59,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-10-03 08:40:59,547 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 187 [2018-10-03 08:40:59,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:40:59,548 INFO L225 Difference]: With dead ends: 346 [2018-10-03 08:40:59,548 INFO L226 Difference]: Without dead ends: 191 [2018-10-03 08:40:59,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2961, Invalid=9695, Unknown=0, NotChecked=0, Total=12656 [2018-10-03 08:40:59,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2018-10-03 08:40:59,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2018-10-03 08:40:59,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-03 08:40:59,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2018-10-03 08:40:59,572 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 187 [2018-10-03 08:40:59,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:40:59,572 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2018-10-03 08:40:59,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-10-03 08:40:59,572 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2018-10-03 08:40:59,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-03 08:40:59,573 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:40:59,573 INFO L375 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 1, 1, 1, 1, 1] [2018-10-03 08:40:59,573 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:40:59,573 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:40:59,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1521017350, now seen corresponding path program 72 times [2018-10-03 08:40:59,574 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:40:59,574 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:40:59,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:59,575 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:40:59,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:40:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 775 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:00,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:00,232 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:00,239 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:41:00,370 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-10-03 08:41:00,370 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:00,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 775 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:00,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:00,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-10-03 08:41:00,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-03 08:41:00,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-03 08:41:00,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:41:00,432 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 40 states. [2018-10-03 08:41:00,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:00,652 INFO L93 Difference]: Finished difference Result 205 states and 208 transitions. [2018-10-03 08:41:00,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-03 08:41:00,652 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 188 [2018-10-03 08:41:00,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:00,653 INFO L225 Difference]: With dead ends: 205 [2018-10-03 08:41:00,653 INFO L226 Difference]: Without dead ends: 199 [2018-10-03 08:41:00,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-10-03 08:41:00,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2018-10-03 08:41:00,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2018-10-03 08:41:00,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2018-10-03 08:41:00,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2018-10-03 08:41:00,677 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 188 [2018-10-03 08:41:00,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:00,677 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2018-10-03 08:41:00,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-03 08:41:00,677 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2018-10-03 08:41:00,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-10-03 08:41:00,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:00,678 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 1, 1, 1, 1, 1] [2018-10-03 08:41:00,678 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:00,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:00,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1787388540, now seen corresponding path program 73 times [2018-10-03 08:41:00,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:00,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:00,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:00,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:00,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:00,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 2812 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:02,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:02,763 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:02,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:02,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:02,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 2812 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:02,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:02,927 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-10-03 08:41:02,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-10-03 08:41:02,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-10-03 08:41:02,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1559, Invalid=4447, Unknown=0, NotChecked=0, Total=6006 [2018-10-03 08:41:02,929 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand 78 states. [2018-10-03 08:41:05,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:05,287 INFO L93 Difference]: Finished difference Result 355 states and 359 transitions. [2018-10-03 08:41:05,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-10-03 08:41:05,288 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 192 [2018-10-03 08:41:05,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:05,288 INFO L225 Difference]: With dead ends: 355 [2018-10-03 08:41:05,288 INFO L226 Difference]: Without dead ends: 196 [2018-10-03 08:41:05,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3117, Invalid=10223, Unknown=0, NotChecked=0, Total=13340 [2018-10-03 08:41:05,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2018-10-03 08:41:05,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2018-10-03 08:41:05,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-10-03 08:41:05,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2018-10-03 08:41:05,310 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 192 [2018-10-03 08:41:05,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:05,310 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2018-10-03 08:41:05,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-10-03 08:41:05,310 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2018-10-03 08:41:05,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2018-10-03 08:41:05,311 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:05,311 INFO L375 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 1, 1, 1, 1, 1] [2018-10-03 08:41:05,311 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:05,312 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:05,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1861088757, now seen corresponding path program 74 times [2018-10-03 08:41:05,312 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:05,312 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:05,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:05,313 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:05,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 815 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:06,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:06,002 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:06,009 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:41:06,091 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:41:06,091 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:06,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3553 backedges. 815 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:06,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:06,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-10-03 08:41:06,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-03 08:41:06,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-03 08:41:06,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:41:06,151 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 41 states. [2018-10-03 08:41:06,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:06,365 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2018-10-03 08:41:06,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-03 08:41:06,365 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 193 [2018-10-03 08:41:06,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:06,366 INFO L225 Difference]: With dead ends: 210 [2018-10-03 08:41:06,366 INFO L226 Difference]: Without dead ends: 204 [2018-10-03 08:41:06,366 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-10-03 08:41:06,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-03 08:41:06,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2018-10-03 08:41:06,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-03 08:41:06,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 202 transitions. [2018-10-03 08:41:06,384 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 202 transitions. Word has length 193 [2018-10-03 08:41:06,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:06,384 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 202 transitions. [2018-10-03 08:41:06,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-03 08:41:06,384 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 202 transitions. [2018-10-03 08:41:06,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-10-03 08:41:06,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:06,385 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 1, 1, 1, 1, 1] [2018-10-03 08:41:06,385 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:06,385 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:06,385 INFO L82 PathProgramCache]: Analyzing trace with hash -315300117, now seen corresponding path program 75 times [2018-10-03 08:41:06,385 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:06,385 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:06,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:06,386 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:06,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 2964 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:08,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:08,343 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:08,350 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:41:08,502 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2018-10-03 08:41:08,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:08,508 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 2964 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:08,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:08,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2018-10-03 08:41:08,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-03 08:41:08,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-03 08:41:08,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1639, Invalid=4681, Unknown=0, NotChecked=0, Total=6320 [2018-10-03 08:41:08,586 INFO L87 Difference]: Start difference. First operand 200 states and 202 transitions. Second operand 80 states. [2018-10-03 08:41:11,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:11,628 INFO L93 Difference]: Finished difference Result 364 states and 368 transitions. [2018-10-03 08:41:11,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2018-10-03 08:41:11,628 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 197 [2018-10-03 08:41:11,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:11,629 INFO L225 Difference]: With dead ends: 364 [2018-10-03 08:41:11,629 INFO L226 Difference]: Without dead ends: 201 [2018-10-03 08:41:11,630 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3277, Invalid=10765, Unknown=0, NotChecked=0, Total=14042 [2018-10-03 08:41:11,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-10-03 08:41:11,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2018-10-03 08:41:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2018-10-03 08:41:11,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 203 transitions. [2018-10-03 08:41:11,655 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 203 transitions. Word has length 197 [2018-10-03 08:41:11,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:11,655 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 203 transitions. [2018-10-03 08:41:11,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-03 08:41:11,655 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 203 transitions. [2018-10-03 08:41:11,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2018-10-03 08:41:11,656 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:11,656 INFO L375 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 1, 1, 1, 1, 1] [2018-10-03 08:41:11,656 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:11,656 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:11,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1372678382, now seen corresponding path program 76 times [2018-10-03 08:41:11,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:11,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:11,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:11,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:11,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 856 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:12,531 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:12,531 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:12,539 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:41:12,631 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:41:12,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:12,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 856 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:12,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:12,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-10-03 08:41:12,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-03 08:41:12,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-03 08:41:12,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:41:12,693 INFO L87 Difference]: Start difference. First operand 201 states and 203 transitions. Second operand 42 states. [2018-10-03 08:41:12,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:12,962 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2018-10-03 08:41:12,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-03 08:41:12,965 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 198 [2018-10-03 08:41:12,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:12,966 INFO L225 Difference]: With dead ends: 215 [2018-10-03 08:41:12,966 INFO L226 Difference]: Without dead ends: 209 [2018-10-03 08:41:12,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-10-03 08:41:12,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2018-10-03 08:41:13,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 205. [2018-10-03 08:41:13,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-03 08:41:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2018-10-03 08:41:13,009 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 198 [2018-10-03 08:41:13,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:13,009 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2018-10-03 08:41:13,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-03 08:41:13,009 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2018-10-03 08:41:13,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-10-03 08:41:13,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:13,010 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 1, 1, 1, 1, 1] [2018-10-03 08:41:13,011 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:13,011 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:13,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1792389512, now seen corresponding path program 77 times [2018-10-03 08:41:13,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:13,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:13,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:13,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:13,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3900 backedges. 3120 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:14,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:14,864 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:14,872 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:41:15,005 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2018-10-03 08:41:15,005 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:15,009 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3900 backedges. 3120 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:15,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:15,068 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2018-10-03 08:41:15,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2018-10-03 08:41:15,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2018-10-03 08:41:15,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1721, Invalid=4921, Unknown=0, NotChecked=0, Total=6642 [2018-10-03 08:41:15,069 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 82 states. [2018-10-03 08:41:17,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:17,835 INFO L93 Difference]: Finished difference Result 373 states and 377 transitions. [2018-10-03 08:41:17,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2018-10-03 08:41:17,835 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 202 [2018-10-03 08:41:17,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:17,836 INFO L225 Difference]: With dead ends: 373 [2018-10-03 08:41:17,836 INFO L226 Difference]: Without dead ends: 206 [2018-10-03 08:41:17,837 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3441, Invalid=11321, Unknown=0, NotChecked=0, Total=14762 [2018-10-03 08:41:17,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2018-10-03 08:41:17,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2018-10-03 08:41:17,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2018-10-03 08:41:17,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 208 transitions. [2018-10-03 08:41:17,862 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 208 transitions. Word has length 202 [2018-10-03 08:41:17,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:17,862 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 208 transitions. [2018-10-03 08:41:17,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has 82 states. [2018-10-03 08:41:17,862 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 208 transitions. [2018-10-03 08:41:17,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2018-10-03 08:41:17,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:17,864 INFO L375 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 39, 1, 1, 1, 1, 1] [2018-10-03 08:41:17,864 INFO L423 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:17,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:17,864 INFO L82 PathProgramCache]: Analyzing trace with hash -185138751, now seen corresponding path program 78 times [2018-10-03 08:41:17,864 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:17,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:17,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:17,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:17,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:17,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 898 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:18,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:18,628 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:18,636 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:41:18,771 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2018-10-03 08:41:18,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:18,775 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:18,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3940 backedges. 898 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:18,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:18,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-10-03 08:41:18,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-03 08:41:18,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-03 08:41:18,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:41:18,833 INFO L87 Difference]: Start difference. First operand 206 states and 208 transitions. Second operand 43 states. [2018-10-03 08:41:19,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:19,091 INFO L93 Difference]: Finished difference Result 220 states and 223 transitions. [2018-10-03 08:41:19,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-03 08:41:19,096 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 203 [2018-10-03 08:41:19,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:19,097 INFO L225 Difference]: With dead ends: 220 [2018-10-03 08:41:19,097 INFO L226 Difference]: Without dead ends: 214 [2018-10-03 08:41:19,097 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-10-03 08:41:19,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2018-10-03 08:41:19,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2018-10-03 08:41:19,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-10-03 08:41:19,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 212 transitions. [2018-10-03 08:41:19,123 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 212 transitions. Word has length 203 [2018-10-03 08:41:19,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:19,124 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 212 transitions. [2018-10-03 08:41:19,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-03 08:41:19,124 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 212 transitions. [2018-10-03 08:41:19,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-10-03 08:41:19,125 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:19,125 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 1, 1, 1, 1, 1] [2018-10-03 08:41:19,125 INFO L423 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:19,125 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:19,126 INFO L82 PathProgramCache]: Analyzing trace with hash -319083337, now seen corresponding path program 79 times [2018-10-03 08:41:19,126 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:19,126 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:19,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:19,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:19,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 3280 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:21,078 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:21,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:21,086 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:21,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:21,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 3280 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:21,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:21,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2018-10-03 08:41:21,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-10-03 08:41:21,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-10-03 08:41:21,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1805, Invalid=5167, Unknown=0, NotChecked=0, Total=6972 [2018-10-03 08:41:21,294 INFO L87 Difference]: Start difference. First operand 210 states and 212 transitions. Second operand 84 states. [2018-10-03 08:41:24,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:24,119 INFO L93 Difference]: Finished difference Result 382 states and 386 transitions. [2018-10-03 08:41:24,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2018-10-03 08:41:24,120 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 207 [2018-10-03 08:41:24,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:24,120 INFO L225 Difference]: With dead ends: 382 [2018-10-03 08:41:24,121 INFO L226 Difference]: Without dead ends: 211 [2018-10-03 08:41:24,122 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2420 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3609, Invalid=11891, Unknown=0, NotChecked=0, Total=15500 [2018-10-03 08:41:24,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2018-10-03 08:41:24,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2018-10-03 08:41:24,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2018-10-03 08:41:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2018-10-03 08:41:24,141 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 207 [2018-10-03 08:41:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:24,141 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2018-10-03 08:41:24,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-10-03 08:41:24,141 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2018-10-03 08:41:24,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2018-10-03 08:41:24,142 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:24,142 INFO L375 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 1, 1, 1, 1, 1] [2018-10-03 08:41:24,142 INFO L423 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:24,142 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:24,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1953503262, now seen corresponding path program 80 times [2018-10-03 08:41:24,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:24,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:24,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:24,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:24,143 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 941 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:24,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:24,905 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:24,912 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:41:25,003 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:41:25,004 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:25,008 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:25,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 941 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:25,073 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:25,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-10-03 08:41:25,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-03 08:41:25,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-03 08:41:25,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:41:25,074 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 44 states. [2018-10-03 08:41:25,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:25,324 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2018-10-03 08:41:25,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-03 08:41:25,325 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 208 [2018-10-03 08:41:25,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:25,325 INFO L225 Difference]: With dead ends: 225 [2018-10-03 08:41:25,326 INFO L226 Difference]: Without dead ends: 219 [2018-10-03 08:41:25,326 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-10-03 08:41:25,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-03 08:41:25,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2018-10-03 08:41:25,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2018-10-03 08:41:25,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2018-10-03 08:41:25,345 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 208 [2018-10-03 08:41:25,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:25,346 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2018-10-03 08:41:25,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-03 08:41:25,346 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2018-10-03 08:41:25,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-10-03 08:41:25,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:25,347 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 1, 1, 1, 1, 1] [2018-10-03 08:41:25,347 INFO L423 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:25,347 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:25,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1125633172, now seen corresponding path program 81 times [2018-10-03 08:41:25,347 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:25,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:25,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:25,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:25,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 3444 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:27,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:27,769 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:27,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:41:27,953 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2018-10-03 08:41:27,953 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:27,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4305 backedges. 3444 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:28,046 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:28,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2018-10-03 08:41:28,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-10-03 08:41:28,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-10-03 08:41:28,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-10-03 08:41:28,049 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand 86 states. [2018-10-03 08:41:30,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:30,774 INFO L93 Difference]: Finished difference Result 391 states and 395 transitions. [2018-10-03 08:41:30,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-03 08:41:30,775 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 212 [2018-10-03 08:41:30,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:30,775 INFO L225 Difference]: With dead ends: 391 [2018-10-03 08:41:30,775 INFO L226 Difference]: Without dead ends: 216 [2018-10-03 08:41:30,776 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3781, Invalid=12475, Unknown=0, NotChecked=0, Total=16256 [2018-10-03 08:41:30,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2018-10-03 08:41:30,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2018-10-03 08:41:30,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-10-03 08:41:30,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 218 transitions. [2018-10-03 08:41:30,797 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 218 transitions. Word has length 212 [2018-10-03 08:41:30,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:30,797 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 218 transitions. [2018-10-03 08:41:30,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-10-03 08:41:30,797 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 218 transitions. [2018-10-03 08:41:30,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2018-10-03 08:41:30,798 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:30,798 INFO L375 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 1, 1, 1, 1, 1] [2018-10-03 08:41:30,799 INFO L423 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:30,799 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:30,799 INFO L82 PathProgramCache]: Analyzing trace with hash -155129459, now seen corresponding path program 82 times [2018-10-03 08:41:30,799 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:30,799 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:30,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:30,800 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:30,800 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 985 proven. 3362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:31,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:31,626 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:31,637 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:41:31,741 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:41:31,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:31,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:31,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 985 proven. 3362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:31,807 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:31,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-10-03 08:41:31,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-03 08:41:31,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-03 08:41:31,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:41:31,809 INFO L87 Difference]: Start difference. First operand 216 states and 218 transitions. Second operand 45 states. [2018-10-03 08:41:32,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:32,138 INFO L93 Difference]: Finished difference Result 230 states and 233 transitions. [2018-10-03 08:41:32,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-03 08:41:32,139 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 213 [2018-10-03 08:41:32,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:32,140 INFO L225 Difference]: With dead ends: 230 [2018-10-03 08:41:32,140 INFO L226 Difference]: Without dead ends: 224 [2018-10-03 08:41:32,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-10-03 08:41:32,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2018-10-03 08:41:32,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2018-10-03 08:41:32,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-10-03 08:41:32,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 222 transitions. [2018-10-03 08:41:32,165 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 222 transitions. Word has length 213 [2018-10-03 08:41:32,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:32,165 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 222 transitions. [2018-10-03 08:41:32,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-03 08:41:32,165 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 222 transitions. [2018-10-03 08:41:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-10-03 08:41:32,166 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:32,166 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 1, 1, 1, 1, 1] [2018-10-03 08:41:32,166 INFO L423 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:32,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:32,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1531687293, now seen corresponding path program 83 times [2018-10-03 08:41:32,167 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:32,167 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:32,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:32,168 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:32,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4515 backedges. 3612 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:34,561 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:34,561 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:34,570 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:41:34,728 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2018-10-03 08:41:34,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:34,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:34,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4515 backedges. 3612 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:34,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:34,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2018-10-03 08:41:34,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2018-10-03 08:41:34,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2018-10-03 08:41:34,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1979, Invalid=5677, Unknown=0, NotChecked=0, Total=7656 [2018-10-03 08:41:34,798 INFO L87 Difference]: Start difference. First operand 220 states and 222 transitions. Second operand 88 states. [2018-10-03 08:41:37,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:37,732 INFO L93 Difference]: Finished difference Result 400 states and 404 transitions. [2018-10-03 08:41:37,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2018-10-03 08:41:37,732 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 217 [2018-10-03 08:41:37,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:37,733 INFO L225 Difference]: With dead ends: 400 [2018-10-03 08:41:37,733 INFO L226 Difference]: Without dead ends: 221 [2018-10-03 08:41:37,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2667 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3957, Invalid=13073, Unknown=0, NotChecked=0, Total=17030 [2018-10-03 08:41:37,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-10-03 08:41:37,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2018-10-03 08:41:37,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-03 08:41:37,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2018-10-03 08:41:37,763 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 217 [2018-10-03 08:41:37,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:37,763 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2018-10-03 08:41:37,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 88 states. [2018-10-03 08:41:37,763 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2018-10-03 08:41:37,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2018-10-03 08:41:37,764 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:37,765 INFO L375 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 1, 1, 1, 1, 1] [2018-10-03 08:41:37,765 INFO L423 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:37,765 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:37,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1128490282, now seen corresponding path program 84 times [2018-10-03 08:41:37,765 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:37,765 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:37,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:37,766 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:37,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 1030 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:38,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:38,641 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:38,650 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:41:38,810 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-10-03 08:41:38,811 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:38,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4558 backedges. 1030 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:38,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:38,880 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-10-03 08:41:38,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-03 08:41:38,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-03 08:41:38,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:41:38,881 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand 46 states. [2018-10-03 08:41:39,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:39,161 INFO L93 Difference]: Finished difference Result 235 states and 238 transitions. [2018-10-03 08:41:39,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-03 08:41:39,162 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 218 [2018-10-03 08:41:39,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:39,163 INFO L225 Difference]: With dead ends: 235 [2018-10-03 08:41:39,163 INFO L226 Difference]: Without dead ends: 229 [2018-10-03 08:41:39,163 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-10-03 08:41:39,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2018-10-03 08:41:39,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 225. [2018-10-03 08:41:39,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2018-10-03 08:41:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 227 transitions. [2018-10-03 08:41:39,185 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 227 transitions. Word has length 218 [2018-10-03 08:41:39,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:39,185 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 227 transitions. [2018-10-03 08:41:39,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-03 08:41:39,185 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 227 transitions. [2018-10-03 08:41:39,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-10-03 08:41:39,186 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:39,186 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 1, 1, 1, 1, 1] [2018-10-03 08:41:39,186 INFO L423 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:39,186 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:39,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1373260896, now seen corresponding path program 85 times [2018-10-03 08:41:39,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:39,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:39,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:39,187 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:39,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:39,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4730 backedges. 3784 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:41,497 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:41,497 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:41,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:41,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:41,613 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4730 backedges. 3784 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:41,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:41,676 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2018-10-03 08:41:41,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2018-10-03 08:41:41,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2018-10-03 08:41:41,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2069, Invalid=5941, Unknown=0, NotChecked=0, Total=8010 [2018-10-03 08:41:41,677 INFO L87 Difference]: Start difference. First operand 225 states and 227 transitions. Second operand 90 states. [2018-10-03 08:41:44,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:44,807 INFO L93 Difference]: Finished difference Result 409 states and 413 transitions. [2018-10-03 08:41:44,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2018-10-03 08:41:44,807 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 222 [2018-10-03 08:41:44,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:44,808 INFO L225 Difference]: With dead ends: 409 [2018-10-03 08:41:44,808 INFO L226 Difference]: Without dead ends: 226 [2018-10-03 08:41:44,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4137, Invalid=13685, Unknown=0, NotChecked=0, Total=17822 [2018-10-03 08:41:44,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-10-03 08:41:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2018-10-03 08:41:44,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2018-10-03 08:41:44,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 228 transitions. [2018-10-03 08:41:44,831 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 228 transitions. Word has length 222 [2018-10-03 08:41:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:44,831 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 228 transitions. [2018-10-03 08:41:44,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has 90 states. [2018-10-03 08:41:44,831 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 228 transitions. [2018-10-03 08:41:44,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2018-10-03 08:41:44,832 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:44,832 INFO L375 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 43, 1, 1, 1, 1, 1] [2018-10-03 08:41:44,832 INFO L423 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:44,832 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:44,832 INFO L82 PathProgramCache]: Analyzing trace with hash 2022550873, now seen corresponding path program 86 times [2018-10-03 08:41:44,832 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:44,832 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:44,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:44,833 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:41:44,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 1076 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:45,701 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:45,701 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:45,710 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:41:45,816 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:41:45,816 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:45,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4774 backedges. 1076 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:45,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:45,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-10-03 08:41:45,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-03 08:41:45,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-03 08:41:45,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:41:45,885 INFO L87 Difference]: Start difference. First operand 226 states and 228 transitions. Second operand 47 states. [2018-10-03 08:41:46,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:46,226 INFO L93 Difference]: Finished difference Result 240 states and 243 transitions. [2018-10-03 08:41:46,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-03 08:41:46,227 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 223 [2018-10-03 08:41:46,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:46,228 INFO L225 Difference]: With dead ends: 240 [2018-10-03 08:41:46,228 INFO L226 Difference]: Without dead ends: 234 [2018-10-03 08:41:46,229 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-10-03 08:41:46,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-03 08:41:46,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 230. [2018-10-03 08:41:46,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2018-10-03 08:41:46,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 232 transitions. [2018-10-03 08:41:46,252 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 232 transitions. Word has length 223 [2018-10-03 08:41:46,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:46,252 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 232 transitions. [2018-10-03 08:41:46,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-03 08:41:46,252 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 232 transitions. [2018-10-03 08:41:46,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-10-03 08:41:46,253 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:46,253 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 1, 1, 1, 1, 1] [2018-10-03 08:41:46,253 INFO L423 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:46,253 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:46,253 INFO L82 PathProgramCache]: Analyzing trace with hash 664947791, now seen corresponding path program 87 times [2018-10-03 08:41:46,253 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:46,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:46,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:46,254 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:46,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 3960 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:48,979 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:48,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:48,987 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:41:49,181 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2018-10-03 08:41:49,181 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:49,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 3960 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:49,252 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:49,252 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2018-10-03 08:41:49,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2018-10-03 08:41:49,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2018-10-03 08:41:49,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2161, Invalid=6211, Unknown=0, NotChecked=0, Total=8372 [2018-10-03 08:41:49,254 INFO L87 Difference]: Start difference. First operand 230 states and 232 transitions. Second operand 92 states. [2018-10-03 08:41:52,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:52,300 INFO L93 Difference]: Finished difference Result 418 states and 422 transitions. [2018-10-03 08:41:52,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2018-10-03 08:41:52,300 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 227 [2018-10-03 08:41:52,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:52,301 INFO L225 Difference]: With dead ends: 418 [2018-10-03 08:41:52,301 INFO L226 Difference]: Without dead ends: 231 [2018-10-03 08:41:52,303 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4321, Invalid=14311, Unknown=0, NotChecked=0, Total=18632 [2018-10-03 08:41:52,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-10-03 08:41:52,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2018-10-03 08:41:52,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2018-10-03 08:41:52,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2018-10-03 08:41:52,342 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 227 [2018-10-03 08:41:52,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:52,342 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2018-10-03 08:41:52,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 92 states. [2018-10-03 08:41:52,342 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2018-10-03 08:41:52,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2018-10-03 08:41:52,343 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:52,343 INFO L375 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 1, 1, 1, 1, 1] [2018-10-03 08:41:52,343 INFO L423 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:52,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:52,343 INFO L82 PathProgramCache]: Analyzing trace with hash -402751946, now seen corresponding path program 88 times [2018-10-03 08:41:52,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:52,344 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:52,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:52,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:52,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 1123 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:53,511 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:53,511 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:53,520 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:41:53,631 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:41:53,631 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:53,639 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:53,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4995 backedges. 1123 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:53,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:53,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-10-03 08:41:53,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-03 08:41:53,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-03 08:41:53,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:41:53,706 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 48 states. [2018-10-03 08:41:54,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:41:54,019 INFO L93 Difference]: Finished difference Result 245 states and 248 transitions. [2018-10-03 08:41:54,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-03 08:41:54,026 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 228 [2018-10-03 08:41:54,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:41:54,027 INFO L225 Difference]: With dead ends: 245 [2018-10-03 08:41:54,027 INFO L226 Difference]: Without dead ends: 239 [2018-10-03 08:41:54,027 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-10-03 08:41:54,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2018-10-03 08:41:54,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2018-10-03 08:41:54,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2018-10-03 08:41:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2018-10-03 08:41:54,055 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 228 [2018-10-03 08:41:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:41:54,055 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2018-10-03 08:41:54,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-03 08:41:54,055 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2018-10-03 08:41:54,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-10-03 08:41:54,056 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:41:54,056 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 45, 1, 1, 1, 1, 1] [2018-10-03 08:41:54,057 INFO L423 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:41:54,057 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:41:54,057 INFO L82 PathProgramCache]: Analyzing trace with hash -564828500, now seen corresponding path program 89 times [2018-10-03 08:41:54,057 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:41:54,057 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:41:54,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:54,058 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:41:54,058 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:41:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:41:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5175 backedges. 4140 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:56,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:41:56,553 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:41:56,560 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:41:56,718 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2018-10-03 08:41:56,718 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:41:56,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:41:56,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5175 backedges. 4140 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:41:56,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:41:56,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2018-10-03 08:41:56,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2018-10-03 08:41:56,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2018-10-03 08:41:56,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2255, Invalid=6487, Unknown=0, NotChecked=0, Total=8742 [2018-10-03 08:41:56,794 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand 94 states. [2018-10-03 08:42:00,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:00,272 INFO L93 Difference]: Finished difference Result 427 states and 431 transitions. [2018-10-03 08:42:00,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2018-10-03 08:42:00,272 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 232 [2018-10-03 08:42:00,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:00,273 INFO L225 Difference]: With dead ends: 427 [2018-10-03 08:42:00,273 INFO L226 Difference]: Without dead ends: 236 [2018-10-03 08:42:00,274 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4509, Invalid=14951, Unknown=0, NotChecked=0, Total=19460 [2018-10-03 08:42:00,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2018-10-03 08:42:00,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2018-10-03 08:42:00,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2018-10-03 08:42:00,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 238 transitions. [2018-10-03 08:42:00,302 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 238 transitions. Word has length 232 [2018-10-03 08:42:00,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:00,302 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 238 transitions. [2018-10-03 08:42:00,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 94 states. [2018-10-03 08:42:00,302 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 238 transitions. [2018-10-03 08:42:00,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2018-10-03 08:42:00,303 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:00,303 INFO L375 BasicCegarLoop]: trace histogram [46, 46, 46, 45, 45, 1, 1, 1, 1, 1] [2018-10-03 08:42:00,303 INFO L423 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:00,303 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:00,304 INFO L82 PathProgramCache]: Analyzing trace with hash 522145061, now seen corresponding path program 90 times [2018-10-03 08:42:00,304 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:00,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:00,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:00,304 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:00,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:00,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 1171 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:01,355 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:01,356 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:01,363 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:42:01,537 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2018-10-03 08:42:01,537 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:01,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 1171 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:01,608 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:01,608 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-10-03 08:42:01,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-03 08:42:01,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-03 08:42:01,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:42:01,609 INFO L87 Difference]: Start difference. First operand 236 states and 238 transitions. Second operand 49 states. [2018-10-03 08:42:02,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:02,012 INFO L93 Difference]: Finished difference Result 250 states and 253 transitions. [2018-10-03 08:42:02,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-03 08:42:02,019 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 233 [2018-10-03 08:42:02,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:02,020 INFO L225 Difference]: With dead ends: 250 [2018-10-03 08:42:02,020 INFO L226 Difference]: Without dead ends: 244 [2018-10-03 08:42:02,020 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-10-03 08:42:02,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2018-10-03 08:42:02,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2018-10-03 08:42:02,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2018-10-03 08:42:02,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2018-10-03 08:42:02,046 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 233 [2018-10-03 08:42:02,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:02,047 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2018-10-03 08:42:02,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-03 08:42:02,047 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2018-10-03 08:42:02,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-10-03 08:42:02,047 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:02,048 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 1, 1, 1, 1, 1] [2018-10-03 08:42:02,048 INFO L423 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:02,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:02,048 INFO L82 PathProgramCache]: Analyzing trace with hash -377018853, now seen corresponding path program 91 times [2018-10-03 08:42:02,048 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:02,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:02,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:02,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:02,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 4324 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:05,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:05,358 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:05,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:05,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:05,474 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 4324 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:05,541 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:05,541 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2018-10-03 08:42:05,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2018-10-03 08:42:05,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2018-10-03 08:42:05,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=6769, Unknown=0, NotChecked=0, Total=9120 [2018-10-03 08:42:05,542 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand 96 states. [2018-10-03 08:42:08,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:08,915 INFO L93 Difference]: Finished difference Result 436 states and 440 transitions. [2018-10-03 08:42:08,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2018-10-03 08:42:08,915 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 237 [2018-10-03 08:42:08,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:08,916 INFO L225 Difference]: With dead ends: 436 [2018-10-03 08:42:08,916 INFO L226 Difference]: Without dead ends: 241 [2018-10-03 08:42:08,917 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3197 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4701, Invalid=15605, Unknown=0, NotChecked=0, Total=20306 [2018-10-03 08:42:08,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2018-10-03 08:42:08,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2018-10-03 08:42:08,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2018-10-03 08:42:08,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 243 transitions. [2018-10-03 08:42:08,940 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 243 transitions. Word has length 237 [2018-10-03 08:42:08,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:08,941 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 243 transitions. [2018-10-03 08:42:08,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 96 states. [2018-10-03 08:42:08,941 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 243 transitions. [2018-10-03 08:42:08,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2018-10-03 08:42:08,941 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:08,942 INFO L375 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1, 1, 1, 1] [2018-10-03 08:42:08,942 INFO L423 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:08,942 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:08,942 INFO L82 PathProgramCache]: Analyzing trace with hash 125264706, now seen corresponding path program 92 times [2018-10-03 08:42:08,942 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:08,942 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:08,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:08,943 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:08,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:09,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 1220 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:09,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:09,927 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:09,935 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:42:10,043 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:42:10,044 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:10,048 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5452 backedges. 1220 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:10,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:10,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-10-03 08:42:10,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-03 08:42:10,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-03 08:42:10,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:42:10,133 INFO L87 Difference]: Start difference. First operand 241 states and 243 transitions. Second operand 50 states. [2018-10-03 08:42:10,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:10,489 INFO L93 Difference]: Finished difference Result 255 states and 258 transitions. [2018-10-03 08:42:10,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-03 08:42:10,490 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 238 [2018-10-03 08:42:10,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:10,491 INFO L225 Difference]: With dead ends: 255 [2018-10-03 08:42:10,491 INFO L226 Difference]: Without dead ends: 249 [2018-10-03 08:42:10,491 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-10-03 08:42:10,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2018-10-03 08:42:10,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 245. [2018-10-03 08:42:10,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-10-03 08:42:10,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2018-10-03 08:42:10,518 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 238 [2018-10-03 08:42:10,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:10,518 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2018-10-03 08:42:10,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-03 08:42:10,518 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2018-10-03 08:42:10,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-10-03 08:42:10,519 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:10,519 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 1, 1, 1, 1, 1] [2018-10-03 08:42:10,519 INFO L423 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:10,520 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:10,520 INFO L82 PathProgramCache]: Analyzing trace with hash 494724536, now seen corresponding path program 93 times [2018-10-03 08:42:10,520 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:10,520 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:10,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:10,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:10,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:10,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5640 backedges. 4512 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:13,133 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:13,133 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:13,142 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:42:13,347 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2018-10-03 08:42:13,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:13,352 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5640 backedges. 4512 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:13,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:13,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2018-10-03 08:42:13,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-10-03 08:42:13,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-10-03 08:42:13,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-10-03 08:42:13,423 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand 98 states. [2018-10-03 08:42:16,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:16,933 INFO L93 Difference]: Finished difference Result 445 states and 449 transitions. [2018-10-03 08:42:16,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2018-10-03 08:42:16,934 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 242 [2018-10-03 08:42:16,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:16,935 INFO L225 Difference]: With dead ends: 445 [2018-10-03 08:42:16,935 INFO L226 Difference]: Without dead ends: 246 [2018-10-03 08:42:16,936 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3337 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4897, Invalid=16273, Unknown=0, NotChecked=0, Total=21170 [2018-10-03 08:42:16,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2018-10-03 08:42:16,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2018-10-03 08:42:16,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2018-10-03 08:42:16,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 248 transitions. [2018-10-03 08:42:16,960 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 248 transitions. Word has length 242 [2018-10-03 08:42:16,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:16,960 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 248 transitions. [2018-10-03 08:42:16,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-10-03 08:42:16,960 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 248 transitions. [2018-10-03 08:42:16,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-10-03 08:42:16,961 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:16,961 INFO L375 BasicCegarLoop]: trace histogram [48, 48, 48, 47, 47, 1, 1, 1, 1, 1] [2018-10-03 08:42:16,961 INFO L423 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:16,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:16,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1883780879, now seen corresponding path program 94 times [2018-10-03 08:42:16,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:16,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:16,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:16,962 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:16,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:16,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 1270 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:18,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:18,017 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:18,026 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:42:18,146 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:42:18,146 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:18,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5688 backedges. 1270 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:18,222 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:18,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-10-03 08:42:18,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-03 08:42:18,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-03 08:42:18,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:42:18,224 INFO L87 Difference]: Start difference. First operand 246 states and 248 transitions. Second operand 51 states. [2018-10-03 08:42:18,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:18,625 INFO L93 Difference]: Finished difference Result 260 states and 263 transitions. [2018-10-03 08:42:18,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-03 08:42:18,625 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 243 [2018-10-03 08:42:18,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:18,626 INFO L225 Difference]: With dead ends: 260 [2018-10-03 08:42:18,626 INFO L226 Difference]: Without dead ends: 254 [2018-10-03 08:42:18,626 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-10-03 08:42:18,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2018-10-03 08:42:18,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 250. [2018-10-03 08:42:18,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2018-10-03 08:42:18,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 252 transitions. [2018-10-03 08:42:18,651 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 252 transitions. Word has length 243 [2018-10-03 08:42:18,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:18,651 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 252 transitions. [2018-10-03 08:42:18,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-03 08:42:18,651 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 252 transitions. [2018-10-03 08:42:18,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-10-03 08:42:18,652 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:18,652 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 48, 1, 1, 1, 1, 1] [2018-10-03 08:42:18,652 INFO L423 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:18,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:18,653 INFO L82 PathProgramCache]: Analyzing trace with hash 514120679, now seen corresponding path program 95 times [2018-10-03 08:42:18,653 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:18,653 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:18,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:18,653 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:18,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5880 backedges. 4704 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:21,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:21,379 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:21,388 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:42:21,558 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-10-03 08:42:21,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:21,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5880 backedges. 4704 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:21,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:21,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2018-10-03 08:42:21,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2018-10-03 08:42:21,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2018-10-03 08:42:21,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2549, Invalid=7351, Unknown=0, NotChecked=0, Total=9900 [2018-10-03 08:42:21,637 INFO L87 Difference]: Start difference. First operand 250 states and 252 transitions. Second operand 100 states. [2018-10-03 08:42:25,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:25,385 INFO L93 Difference]: Finished difference Result 454 states and 458 transitions. [2018-10-03 08:42:25,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-03 08:42:25,385 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 247 [2018-10-03 08:42:25,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:25,386 INFO L225 Difference]: With dead ends: 454 [2018-10-03 08:42:25,386 INFO L226 Difference]: Without dead ends: 251 [2018-10-03 08:42:25,387 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3480 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5097, Invalid=16955, Unknown=0, NotChecked=0, Total=22052 [2018-10-03 08:42:25,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2018-10-03 08:42:25,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2018-10-03 08:42:25,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2018-10-03 08:42:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 253 transitions. [2018-10-03 08:42:25,414 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 253 transitions. Word has length 247 [2018-10-03 08:42:25,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:25,414 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 253 transitions. [2018-10-03 08:42:25,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has 100 states. [2018-10-03 08:42:25,414 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 253 transitions. [2018-10-03 08:42:25,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2018-10-03 08:42:25,415 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:25,415 INFO L375 BasicCegarLoop]: trace histogram [49, 49, 49, 48, 48, 1, 1, 1, 1, 1] [2018-10-03 08:42:25,415 INFO L423 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:25,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:25,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1107028914, now seen corresponding path program 96 times [2018-10-03 08:42:25,416 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:25,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:25,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:25,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:25,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 1321 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:26,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:26,468 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:26,475 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:42:26,660 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-10-03 08:42:26,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:26,665 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:26,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 1321 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:26,757 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:26,757 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-10-03 08:42:26,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-03 08:42:26,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-03 08:42:26,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:42:26,758 INFO L87 Difference]: Start difference. First operand 251 states and 253 transitions. Second operand 52 states. [2018-10-03 08:42:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:27,100 INFO L93 Difference]: Finished difference Result 265 states and 268 transitions. [2018-10-03 08:42:27,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-03 08:42:27,100 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 248 [2018-10-03 08:42:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:27,101 INFO L225 Difference]: With dead ends: 265 [2018-10-03 08:42:27,101 INFO L226 Difference]: Without dead ends: 259 [2018-10-03 08:42:27,102 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-10-03 08:42:27,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-10-03 08:42:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 255. [2018-10-03 08:42:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2018-10-03 08:42:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 257 transitions. [2018-10-03 08:42:27,128 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 257 transitions. Word has length 248 [2018-10-03 08:42:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:27,128 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 257 transitions. [2018-10-03 08:42:27,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-03 08:42:27,128 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 257 transitions. [2018-10-03 08:42:27,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-10-03 08:42:27,129 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:27,129 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 49, 49, 49, 1, 1, 1, 1, 1] [2018-10-03 08:42:27,129 INFO L423 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:27,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:27,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1827811524, now seen corresponding path program 97 times [2018-10-03 08:42:27,130 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:27,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:27,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:27,130 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:27,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6125 backedges. 4900 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:30,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:30,344 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:30,351 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:30,473 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:30,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6125 backedges. 4900 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:30,547 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:30,547 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2018-10-03 08:42:30,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2018-10-03 08:42:30,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2018-10-03 08:42:30,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2651, Invalid=7651, Unknown=0, NotChecked=0, Total=10302 [2018-10-03 08:42:30,549 INFO L87 Difference]: Start difference. First operand 255 states and 257 transitions. Second operand 102 states. [2018-10-03 08:42:33,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:33,550 INFO L93 Difference]: Finished difference Result 463 states and 467 transitions. [2018-10-03 08:42:33,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2018-10-03 08:42:33,550 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 252 [2018-10-03 08:42:33,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:33,551 INFO L225 Difference]: With dead ends: 463 [2018-10-03 08:42:33,552 INFO L226 Difference]: Without dead ends: 256 [2018-10-03 08:42:33,552 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5301, Invalid=17651, Unknown=0, NotChecked=0, Total=22952 [2018-10-03 08:42:33,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2018-10-03 08:42:33,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2018-10-03 08:42:33,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-10-03 08:42:33,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 258 transitions. [2018-10-03 08:42:33,580 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 258 transitions. Word has length 252 [2018-10-03 08:42:33,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:33,580 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 258 transitions. [2018-10-03 08:42:33,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 102 states. [2018-10-03 08:42:33,580 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 258 transitions. [2018-10-03 08:42:33,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2018-10-03 08:42:33,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:33,582 INFO L375 BasicCegarLoop]: trace histogram [50, 50, 50, 49, 49, 1, 1, 1, 1, 1] [2018-10-03 08:42:33,582 INFO L423 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:33,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:33,582 INFO L82 PathProgramCache]: Analyzing trace with hash -803659587, now seen corresponding path program 98 times [2018-10-03 08:42:33,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:33,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:33,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:33,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:33,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 1373 proven. 4802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:34,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:34,923 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:34,932 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-03 08:42:35,049 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-03 08:42:35,049 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:35,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:35,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6175 backedges. 1373 proven. 4802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:35,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:35,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-10-03 08:42:35,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-03 08:42:35,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-03 08:42:35,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:42:35,129 INFO L87 Difference]: Start difference. First operand 256 states and 258 transitions. Second operand 53 states. [2018-10-03 08:42:35,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:35,446 INFO L93 Difference]: Finished difference Result 270 states and 273 transitions. [2018-10-03 08:42:35,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-03 08:42:35,446 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 253 [2018-10-03 08:42:35,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:35,447 INFO L225 Difference]: With dead ends: 270 [2018-10-03 08:42:35,447 INFO L226 Difference]: Without dead ends: 264 [2018-10-03 08:42:35,448 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-10-03 08:42:35,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2018-10-03 08:42:35,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2018-10-03 08:42:35,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2018-10-03 08:42:35,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 262 transitions. [2018-10-03 08:42:35,481 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 262 transitions. Word has length 253 [2018-10-03 08:42:35,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:35,481 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 262 transitions. [2018-10-03 08:42:35,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-03 08:42:35,481 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 262 transitions. [2018-10-03 08:42:35,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-10-03 08:42:35,482 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:35,482 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 50, 50, 50, 1, 1, 1, 1, 1] [2018-10-03 08:42:35,482 INFO L423 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:35,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:35,482 INFO L82 PathProgramCache]: Analyzing trace with hash 465399219, now seen corresponding path program 99 times [2018-10-03 08:42:35,482 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:35,482 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:35,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:35,483 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:35,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6375 backedges. 5100 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:38,458 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:38,458 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:38,466 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-03 08:42:38,698 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2018-10-03 08:42:38,698 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:38,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6375 backedges. 5100 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:38,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:38,799 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 103 [2018-10-03 08:42:38,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2018-10-03 08:42:38,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2018-10-03 08:42:38,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2755, Invalid=7957, Unknown=0, NotChecked=0, Total=10712 [2018-10-03 08:42:38,801 INFO L87 Difference]: Start difference. First operand 260 states and 262 transitions. Second operand 104 states. [2018-10-03 08:42:42,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:42,618 INFO L93 Difference]: Finished difference Result 472 states and 476 transitions. [2018-10-03 08:42:42,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-10-03 08:42:42,618 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 257 [2018-10-03 08:42:42,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:42,619 INFO L225 Difference]: With dead ends: 472 [2018-10-03 08:42:42,619 INFO L226 Difference]: Without dead ends: 261 [2018-10-03 08:42:42,620 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3775 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=5509, Invalid=18361, Unknown=0, NotChecked=0, Total=23870 [2018-10-03 08:42:42,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2018-10-03 08:42:42,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2018-10-03 08:42:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2018-10-03 08:42:42,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 263 transitions. [2018-10-03 08:42:42,646 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 263 transitions. Word has length 257 [2018-10-03 08:42:42,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:42,646 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 263 transitions. [2018-10-03 08:42:42,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 104 states. [2018-10-03 08:42:42,646 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 263 transitions. [2018-10-03 08:42:42,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2018-10-03 08:42:42,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:42,647 INFO L375 BasicCegarLoop]: trace histogram [51, 51, 51, 50, 50, 1, 1, 1, 1, 1] [2018-10-03 08:42:42,647 INFO L423 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:42,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:42,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1064997210, now seen corresponding path program 100 times [2018-10-03 08:42:42,648 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:42,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:42,648 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:42,649 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:42,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:43,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 1426 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:43,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:43,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:43,793 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-03 08:42:43,914 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-03 08:42:43,915 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:43,924 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 1426 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:44,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:44,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-10-03 08:42:44,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-03 08:42:44,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-03 08:42:44,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:42:44,021 INFO L87 Difference]: Start difference. First operand 261 states and 263 transitions. Second operand 54 states. [2018-10-03 08:42:44,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:44,398 INFO L93 Difference]: Finished difference Result 275 states and 278 transitions. [2018-10-03 08:42:44,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-03 08:42:44,398 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 258 [2018-10-03 08:42:44,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:44,399 INFO L225 Difference]: With dead ends: 275 [2018-10-03 08:42:44,399 INFO L226 Difference]: Without dead ends: 269 [2018-10-03 08:42:44,400 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-10-03 08:42:44,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2018-10-03 08:42:44,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 265. [2018-10-03 08:42:44,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2018-10-03 08:42:44,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 267 transitions. [2018-10-03 08:42:44,427 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 267 transitions. Word has length 258 [2018-10-03 08:42:44,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:44,428 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 267 transitions. [2018-10-03 08:42:44,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-03 08:42:44,428 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 267 transitions. [2018-10-03 08:42:44,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-10-03 08:42:44,429 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:44,429 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 51, 51, 51, 1, 1, 1, 1, 1] [2018-10-03 08:42:44,429 INFO L423 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:44,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:44,429 INFO L82 PathProgramCache]: Analyzing trace with hash 629884880, now seen corresponding path program 101 times [2018-10-03 08:42:44,429 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:44,429 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:44,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:44,430 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:44,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6630 backedges. 5304 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:47,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:47,580 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:47,587 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-03 08:42:47,908 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 52 check-sat command(s) [2018-10-03 08:42:47,909 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:47,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6630 backedges. 5304 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:48,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:48,026 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 105 [2018-10-03 08:42:48,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2018-10-03 08:42:48,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2018-10-03 08:42:48,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2861, Invalid=8269, Unknown=0, NotChecked=0, Total=11130 [2018-10-03 08:42:48,027 INFO L87 Difference]: Start difference. First operand 265 states and 267 transitions. Second operand 106 states. [2018-10-03 08:42:52,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:52,167 INFO L93 Difference]: Finished difference Result 481 states and 485 transitions. [2018-10-03 08:42:52,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2018-10-03 08:42:52,167 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 262 [2018-10-03 08:42:52,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:52,167 INFO L225 Difference]: With dead ends: 481 [2018-10-03 08:42:52,167 INFO L226 Difference]: Without dead ends: 266 [2018-10-03 08:42:52,168 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3927 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5721, Invalid=19085, Unknown=0, NotChecked=0, Total=24806 [2018-10-03 08:42:52,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2018-10-03 08:42:52,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2018-10-03 08:42:52,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2018-10-03 08:42:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 268 transitions. [2018-10-03 08:42:52,199 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 268 transitions. Word has length 262 [2018-10-03 08:42:52,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:52,199 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 268 transitions. [2018-10-03 08:42:52,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 106 states. [2018-10-03 08:42:52,199 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 268 transitions. [2018-10-03 08:42:52,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2018-10-03 08:42:52,200 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:52,200 INFO L375 BasicCegarLoop]: trace histogram [52, 52, 52, 51, 51, 1, 1, 1, 1, 1] [2018-10-03 08:42:52,201 INFO L423 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:52,201 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:52,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1501211511, now seen corresponding path program 102 times [2018-10-03 08:42:52,201 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:52,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:52,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:52,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:52,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:53,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 1480 proven. 5202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:53,392 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:53,392 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:53,399 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-03 08:42:53,591 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2018-10-03 08:42:53,591 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-03 08:42:53,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6682 backedges. 1480 proven. 5202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:53,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:53,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-10-03 08:42:53,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-03 08:42:53,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-03 08:42:53,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:42:53,684 INFO L87 Difference]: Start difference. First operand 266 states and 268 transitions. Second operand 55 states. [2018-10-03 08:42:54,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-03 08:42:54,020 INFO L93 Difference]: Finished difference Result 280 states and 283 transitions. [2018-10-03 08:42:54,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-03 08:42:54,020 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 263 [2018-10-03 08:42:54,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-03 08:42:54,021 INFO L225 Difference]: With dead ends: 280 [2018-10-03 08:42:54,021 INFO L226 Difference]: Without dead ends: 274 [2018-10-03 08:42:54,021 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-10-03 08:42:54,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2018-10-03 08:42:54,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2018-10-03 08:42:54,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-10-03 08:42:54,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 272 transitions. [2018-10-03 08:42:54,053 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 272 transitions. Word has length 263 [2018-10-03 08:42:54,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-03 08:42:54,053 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 272 transitions. [2018-10-03 08:42:54,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-03 08:42:54,053 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 272 transitions. [2018-10-03 08:42:54,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-10-03 08:42:54,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-03 08:42:54,054 INFO L375 BasicCegarLoop]: trace histogram [53, 53, 52, 52, 52, 1, 1, 1, 1, 1] [2018-10-03 08:42:54,054 INFO L423 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-03 08:42:54,054 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-03 08:42:54,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1240278145, now seen corresponding path program 103 times [2018-10-03 08:42:54,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-03 08:42:54,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-03 08:42:54,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:54,055 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-03 08:42:54,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-03 08:42:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6890 backedges. 5512 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:57,423 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-03 08:42:57,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-03 08:42:57,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-03 08:42:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-03 08:42:57,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-03 08:42:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6890 backedges. 5512 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-03 08:42:57,654 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-03 08:42:57,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 107 [2018-10-03 08:42:57,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2018-10-03 08:42:57,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2018-10-03 08:42:57,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2969, Invalid=8587, Unknown=0, NotChecked=0, Total=11556 [2018-10-03 08:42:57,655 INFO L87 Difference]: Start difference. First operand 270 states and 272 transitions. Second operand 108 states. Received shutdown request... [2018-10-03 08:43:00,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-10-03 08:43:00,227 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-03 08:43:00,231 WARN L205 ceAbstractionStarter]: Timeout [2018-10-03 08:43:00,232 INFO L202 PluginConnector]: Adding new model down.i_4.bplTransformedIcfg_BEv2_5.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 08:43:00 BoogieIcfgContainer [2018-10-03 08:43:00,232 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-03 08:43:00,233 INFO L168 Benchmark]: Toolchain (without parser) took 233821.21 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 307.2 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 389.5 MB). Peak memory consumption was 696.8 MB. Max. memory is 7.1 GB. [2018-10-03 08:43:00,234 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:43:00,235 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.70 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:43:00,235 INFO L168 Benchmark]: Boogie Preprocessor took 23.60 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-03 08:43:00,235 INFO L168 Benchmark]: RCFGBuilder took 317.58 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-03 08:43:00,235 INFO L168 Benchmark]: TraceAbstraction took 233433.31 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 307.2 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 368.4 MB). Peak memory consumption was 675.6 MB. Max. memory is 7.1 GB. [2018-10-03 08:43:00,237 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.19 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.70 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.60 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 317.58 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 233433.31 ms. Allocated memory was 1.5 GB in the beginning and 1.8 GB in the end (delta: 307.2 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 368.4 MB). Peak memory consumption was 675.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 76). Cancelled while BasicCegarLoop was constructing difference of abstraction (270states) and FLOYD_HOARE automaton (currently 86 states, 108 states before enhancement), while PredicateComparison was comparing new predicate (quantifier-free) to 139 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. TIMEOUT Result, 233.3s OverallTime, 107 OverallIterations, 53 TraceHistogramMax, 107.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 3257 SDtfs, 7619 SDslu, 72863 SDs, 0 SdLazy, 78432 SolverSat, 1660 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 46.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21330 GetRequests, 15624 SyntacticMatches, 0 SemanticMatches, 5705 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72824 ImplicationChecksByTransitivity, 142.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=270occurred in iteration=106, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 1.6s AutomataMinimizationTime, 106 MinimizatonAttempts, 214 StatesRemovedByMinimization, 54 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 1.6s SsaConstructionTime, 9.0s SatisfiabilityAnalysisTime, 107.7s InterpolantComputationTime, 28614 NumberOfCodeBlocks, 28614 NumberOfCodeBlocksAsserted, 1604 NumberOfCheckSat, 28404 ConstructedInterpolants, 0 QuantifiedInterpolants, 14943864 SizeOfPredicates, 207 NumberOfNonLiveVariables, 45579 ConjunctsInSsa, 5769 ConjunctsInUnsatCore, 210 InterpolantComputations, 4 PerfectInterpolantSequences, 253344/485056 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-03_08-43-00-249.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/down.i_4.bplTransformedIcfg_BEv2_5.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-03_08-43-00-249.csv Completed graceful shutdown