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/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:35:48,238 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:35:48,240 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:35:48,252 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2018-09-23 19:35:48,289 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 19:35:48,303 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:35:48,304 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:35:48,305 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:35:48,305 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:35:48,305 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:35:48,306 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:35:48,306 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:35:48,306 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:35:48,306 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:35:48,306 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:35:48,307 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:35:48,307 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:35:48,307 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:35:48,307 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:35:48,307 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:35:48,308 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:35:48,308 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:35:48,308 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:35:48,308 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:35:48,308 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:35:48,309 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:35:48,309 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:35:48,309 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:35:48,309 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:35:48,309 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:35:48,310 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:35:48,310 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:35:48,310 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:35:48,310 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:35:48,310 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:35:48,354 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:35:48,368 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:35:48,372 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:35:48,373 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:35:48,374 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:35:48,374 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-09-23 19:35:48,375 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170319-ConjunctivePathPrograms/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl' [2018-09-23 19:35:48,435 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:35:48,439 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:35:48,439 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:35:48,440 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:35:48,440 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:35:48,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:35:48" (1/1) ... [2018-09-23 19:35:48,471 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:35:48" (1/1) ... [2018-09-23 19:35:48,479 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:35:48,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:35:48,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:35:48,480 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:35:48,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:35:48" (1/1) ... [2018-09-23 19:35:48,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:35:48" (1/1) ... [2018-09-23 19:35:48,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:35:48" (1/1) ... [2018-09-23 19:35:48,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:35:48" (1/1) ... [2018-09-23 19:35:48,497 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:35:48" (1/1) ... [2018-09-23 19:35:48,499 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:35:48" (1/1) ... [2018-09-23 19:35:48,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:35:48" (1/1) ... [2018-09-23 19:35:48,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:35:48,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:35:48,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:35:48,508 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:35:48,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:35:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:35:48,567 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-09-23 19:35:48,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 19:35:48,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 19:35:48,799 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 19:35:48,799 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:35:48 BoogieIcfgContainer [2018-09-23 19:35:48,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:35:48,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:35:48,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:35:48,804 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:35:48,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:35:48" (1/2) ... [2018-09-23 19:35:48,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378de387 and model type nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:35:48, skipping insertion in model container [2018-09-23 19:35:48,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:35:48" (2/2) ... [2018-09-23 19:35:48,808 INFO L112 eAbstractionObserver]: Analyzing ICFG nested1.i_4.bplTransformedIcfg_BEv2_12.bpl [2018-09-23 19:35:48,818 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:35:48,831 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 19:35:48,890 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:35:48,891 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:35:48,891 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:35:48,892 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:35:48,892 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:35:48,892 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:35:48,892 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:35:48,893 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:35:48,893 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:35:48,914 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states. [2018-09-23 19:35:48,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-09-23 19:35:48,927 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:48,929 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-09-23 19:35:48,930 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:48,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:48,937 INFO L82 PathProgramCache]: Analyzing trace with hash 29955, now seen corresponding path program 1 times [2018-09-23 19:35:48,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:48,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:48,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:48,994 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:48,994 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:49,099 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:35:49,099 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 19:35:49,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:35:49,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:35:49,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:35:49,120 INFO L87 Difference]: Start difference. First operand 5 states. Second operand 3 states. [2018-09-23 19:35:49,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:49,197 INFO L93 Difference]: Finished difference Result 11 states and 17 transitions. [2018-09-23 19:35:49,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:35:49,199 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2018-09-23 19:35:49,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:49,211 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:35:49,212 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 19:35:49,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:35:49,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 19:35:49,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2018-09-23 19:35:49,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-09-23 19:35:49,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2018-09-23 19:35:49,292 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 7 transitions. Word has length 3 [2018-09-23 19:35:49,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:49,293 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 7 transitions. [2018-09-23 19:35:49,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:35:49,293 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 7 transitions. [2018-09-23 19:35:49,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 19:35:49,294 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:49,294 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-23 19:35:49,294 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:49,295 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:49,295 INFO L82 PathProgramCache]: Analyzing trace with hash 28854189, now seen corresponding path program 1 times [2018-09-23 19:35:49,295 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:49,295 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:49,296 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:49,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:49,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:49,354 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:35:49,354 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-23 19:35:49,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 19:35:49,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 19:35:49,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:35:49,357 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. Second operand 3 states. [2018-09-23 19:35:49,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:49,388 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2018-09-23 19:35:49,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 19:35:49,389 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2018-09-23 19:35:49,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:49,389 INFO L225 Difference]: With dead ends: 11 [2018-09-23 19:35:49,390 INFO L226 Difference]: Without dead ends: 7 [2018-09-23 19:35:49,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 19:35:49,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-09-23 19:35:49,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-09-23 19:35:49,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-09-23 19:35:49,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-09-23 19:35:49,394 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-09-23 19:35:49,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:49,394 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2018-09-23 19:35:49,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 19:35:49,394 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2018-09-23 19:35:49,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-09-23 19:35:49,395 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:49,395 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-09-23 19:35:49,395 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:49,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:49,396 INFO L82 PathProgramCache]: Analyzing trace with hash 894431694, now seen corresponding path program 1 times [2018-09-23 19:35:49,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:49,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:49,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:49,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:49,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:49,503 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:49,503 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:49,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:49,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:49,570 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:49,571 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-09-23 19:35:49,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 19:35:49,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 19:35:49,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:35:49,572 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 4 states. [2018-09-23 19:35:49,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:49,608 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2018-09-23 19:35:49,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 19:35:49,609 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-09-23 19:35:49,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:49,609 INFO L225 Difference]: With dead ends: 13 [2018-09-23 19:35:49,609 INFO L226 Difference]: Without dead ends: 8 [2018-09-23 19:35:49,610 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-09-23 19:35:49,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-09-23 19:35:49,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-09-23 19:35:49,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-09-23 19:35:49,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-09-23 19:35:49,614 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-09-23 19:35:49,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:49,614 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2018-09-23 19:35:49,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 19:35:49,615 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2018-09-23 19:35:49,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 19:35:49,615 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:49,616 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-23 19:35:49,616 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:49,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:49,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1957530573, now seen corresponding path program 2 times [2018-09-23 19:35:49,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:49,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:49,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:49,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:49,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:35:49,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:49,715 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:49,724 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:35:49,743 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:35:49,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:49,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:49,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:35:49,859 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:49,859 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5] total 7 [2018-09-23 19:35:49,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:35:49,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:35:49,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:35:49,861 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 7 states. [2018-09-23 19:35:50,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:50,357 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2018-09-23 19:35:50,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:35:50,358 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-23 19:35:50,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:50,358 INFO L225 Difference]: With dead ends: 24 [2018-09-23 19:35:50,359 INFO L226 Difference]: Without dead ends: 18 [2018-09-23 19:35:50,359 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:35:50,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-09-23 19:35:50,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2018-09-23 19:35:50,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-09-23 19:35:50,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-09-23 19:35:50,365 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2018-09-23 19:35:50,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:50,365 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-09-23 19:35:50,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:35:50,365 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-09-23 19:35:50,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:35:50,366 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:50,366 INFO L375 BasicCegarLoop]: trace histogram [6, 2, 2, 1, 1, 1] [2018-09-23 19:35:50,368 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:50,368 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:50,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1143121891, now seen corresponding path program 3 times [2018-09-23 19:35:50,369 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:50,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:50,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:50,370 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:50,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:50,503 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-23 19:35:50,504 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:50,504 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:50,516 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:35:50,537 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-09-23 19:35:50,538 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:50,539 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-09-23 19:35:50,566 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:50,566 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-09-23 19:35:50,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-09-23 19:35:50,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-09-23 19:35:50,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:35:50,568 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2018-09-23 19:35:50,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:50,687 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2018-09-23 19:35:50,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:35:50,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-09-23 19:35:50,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:50,689 INFO L225 Difference]: With dead ends: 24 [2018-09-23 19:35:50,689 INFO L226 Difference]: Without dead ends: 16 [2018-09-23 19:35:50,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:35:50,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-09-23 19:35:50,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-09-23 19:35:50,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-09-23 19:35:50,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2018-09-23 19:35:50,695 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2018-09-23 19:35:50,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:50,695 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2018-09-23 19:35:50,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-09-23 19:35:50,698 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2018-09-23 19:35:50,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:35:50,698 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:50,699 INFO L375 BasicCegarLoop]: trace histogram [8, 2, 2, 1, 1, 1] [2018-09-23 19:35:50,699 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:50,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:50,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1762706263, now seen corresponding path program 4 times [2018-09-23 19:35:50,699 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:50,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:50,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:50,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:50,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:50,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-09-23 19:35:50,811 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:50,811 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:50,822 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:35:50,837 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:35:50,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:50,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:50,905 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-09-23 19:35:50,925 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:50,925 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 10 [2018-09-23 19:35:50,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:35:50,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:35:50,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:35:50,927 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 10 states. [2018-09-23 19:35:51,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:51,719 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2018-09-23 19:35:51,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:35:51,719 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2018-09-23 19:35:51,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:51,720 INFO L225 Difference]: With dead ends: 40 [2018-09-23 19:35:51,720 INFO L226 Difference]: Without dead ends: 31 [2018-09-23 19:35:51,721 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:35:51,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-09-23 19:35:51,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2018-09-23 19:35:51,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 19:35:51,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2018-09-23 19:35:51,728 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 15 [2018-09-23 19:35:51,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:51,729 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2018-09-23 19:35:51,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:35:51,729 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2018-09-23 19:35:51,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 19:35:51,730 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:51,730 INFO L375 BasicCegarLoop]: trace histogram [15, 3, 3, 1, 1, 1] [2018-09-23 19:35:51,730 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:51,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:51,731 INFO L82 PathProgramCache]: Analyzing trace with hash 198739950, now seen corresponding path program 5 times [2018-09-23 19:35:51,731 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:51,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:51,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:51,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:51,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-09-23 19:35:51,891 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:51,892 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:51,908 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:35:51,925 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-09-23 19:35:51,925 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:51,927 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:52,035 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-09-23 19:35:52,059 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:52,060 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 12 [2018-09-23 19:35:52,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:35:52,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:35:52,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:35:52,061 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 12 states. [2018-09-23 19:35:52,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:52,685 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2018-09-23 19:35:52,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:35:52,686 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2018-09-23 19:35:52,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:52,687 INFO L225 Difference]: With dead ends: 60 [2018-09-23 19:35:52,687 INFO L226 Difference]: Without dead ends: 43 [2018-09-23 19:35:52,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:35:52,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-09-23 19:35:52,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2018-09-23 19:35:52,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-09-23 19:35:52,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2018-09-23 19:35:52,697 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2018-09-23 19:35:52,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:52,698 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2018-09-23 19:35:52,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:35:52,698 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2018-09-23 19:35:52,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-09-23 19:35:52,699 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:52,699 INFO L375 BasicCegarLoop]: trace histogram [24, 4, 4, 1, 1, 1] [2018-09-23 19:35:52,699 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:52,700 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:52,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1597467349, now seen corresponding path program 6 times [2018-09-23 19:35:52,700 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:52,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:52,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:52,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:52,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2018-09-23 19:35:52,827 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:52,827 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:52,846 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:35:52,894 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-09-23 19:35:52,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:52,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 251 proven. 21 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2018-09-23 19:35:52,931 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:52,931 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:35:52,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:35:52,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:35:52,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:35:52,932 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2018-09-23 19:35:52,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:52,970 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2018-09-23 19:35:52,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 19:35:52,972 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2018-09-23 19:35:52,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:52,974 INFO L225 Difference]: With dead ends: 67 [2018-09-23 19:35:52,974 INFO L226 Difference]: Without dead ends: 40 [2018-09-23 19:35:52,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:35:52,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-09-23 19:35:52,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-09-23 19:35:52,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-09-23 19:35:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2018-09-23 19:35:52,983 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 35 [2018-09-23 19:35:52,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:52,983 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2018-09-23 19:35:52,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:35:52,984 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2018-09-23 19:35:52,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-09-23 19:35:52,986 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:52,986 INFO L375 BasicCegarLoop]: trace histogram [28, 4, 4, 1, 1, 1] [2018-09-23 19:35:52,987 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:52,987 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:52,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1404785213, now seen corresponding path program 7 times [2018-09-23 19:35:52,987 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:52,987 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:52,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:52,988 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:52,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 394 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2018-09-23 19:35:53,185 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:53,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:53,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:53,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 196 proven. 28 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2018-09-23 19:35:53,425 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:53,425 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 15 [2018-09-23 19:35:53,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:35:53,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:35:53,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:35:53,427 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 15 states. [2018-09-23 19:35:54,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:54,753 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2018-09-23 19:35:54,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:35:54,754 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2018-09-23 19:35:54,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:54,755 INFO L225 Difference]: With dead ends: 93 [2018-09-23 19:35:54,755 INFO L226 Difference]: Without dead ends: 63 [2018-09-23 19:35:54,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=945, Invalid=2025, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:35:54,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-09-23 19:35:54,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2018-09-23 19:35:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-09-23 19:35:54,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-09-23 19:35:54,770 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 39 [2018-09-23 19:35:54,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:54,770 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-09-23 19:35:54,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:35:54,770 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-09-23 19:35:54,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-09-23 19:35:54,772 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:54,772 INFO L375 BasicCegarLoop]: trace histogram [40, 5, 5, 1, 1, 1] [2018-09-23 19:35:54,772 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:54,773 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:54,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1154943019, now seen corresponding path program 8 times [2018-09-23 19:35:54,773 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:54,773 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:54,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:54,774 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:54,774 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 0 proven. 825 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2018-09-23 19:35:54,898 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:54,898 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:54,926 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:35:54,985 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:35:54,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:54,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 329 proven. 36 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2018-09-23 19:35:55,345 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:55,345 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2018-09-23 19:35:55,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:35:55,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:35:55,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:35:55,346 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 17 states. [2018-09-23 19:35:57,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:57,021 INFO L93 Difference]: Finished difference Result 123 states and 142 transitions. [2018-09-23 19:35:57,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:35:57,025 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2018-09-23 19:35:57,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:57,026 INFO L225 Difference]: With dead ends: 123 [2018-09-23 19:35:57,026 INFO L226 Difference]: Without dead ends: 80 [2018-09-23 19:35:57,029 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1540, Invalid=3430, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:35:57,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-09-23 19:35:57,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2018-09-23 19:35:57,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-09-23 19:35:57,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2018-09-23 19:35:57,043 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 53 [2018-09-23 19:35:57,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:57,044 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2018-09-23 19:35:57,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:35:57,044 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2018-09-23 19:35:57,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-09-23 19:35:57,046 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:57,046 INFO L375 BasicCegarLoop]: trace histogram [54, 6, 6, 1, 1, 1] [2018-09-23 19:35:57,046 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:57,047 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:57,047 INFO L82 PathProgramCache]: Analyzing trace with hash -2076506525, now seen corresponding path program 9 times [2018-09-23 19:35:57,047 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:57,047 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:57,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:57,048 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:57,048 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2018-09-23 19:35:57,393 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:57,393 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:57,400 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:35:57,425 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-09-23 19:35:57,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:57,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:57,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 506 proven. 45 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2018-09-23 19:35:57,559 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:57,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 19 [2018-09-23 19:35:57,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:35:57,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:35:57,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:35:57,561 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 19 states. [2018-09-23 19:36:01,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:01,729 INFO L93 Difference]: Finished difference Result 157 states and 179 transitions. [2018-09-23 19:36:01,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2018-09-23 19:36:01,730 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 69 [2018-09-23 19:36:01,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:01,731 INFO L225 Difference]: With dead ends: 157 [2018-09-23 19:36:01,731 INFO L226 Difference]: Without dead ends: 99 [2018-09-23 19:36:01,734 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2376, Invalid=5456, Unknown=0, NotChecked=0, Total=7832 [2018-09-23 19:36:01,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-09-23 19:36:01,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2018-09-23 19:36:01,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-09-23 19:36:01,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2018-09-23 19:36:01,752 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 69 [2018-09-23 19:36:01,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:01,753 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2018-09-23 19:36:01,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:36:01,753 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2018-09-23 19:36:01,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-09-23 19:36:01,755 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:01,755 INFO L375 BasicCegarLoop]: trace histogram [70, 7, 7, 1, 1, 1] [2018-09-23 19:36:01,755 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:01,755 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:01,755 INFO L82 PathProgramCache]: Analyzing trace with hash -815084279, now seen corresponding path program 10 times [2018-09-23 19:36:01,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:01,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:01,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:01,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:01,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2954 backedges. 0 proven. 2569 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-09-23 19:36:02,032 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:02,032 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:02,040 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:02,101 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:02,102 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:02,107 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2954 backedges. 0 proven. 2569 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2018-09-23 19:36:02,172 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:02,172 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-09-23 19:36:02,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:36:02,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:36:02,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:36:02,174 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand 10 states. [2018-09-23 19:36:02,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:02,350 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2018-09-23 19:36:02,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 19:36:02,351 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2018-09-23 19:36:02,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:02,352 INFO L225 Difference]: With dead ends: 113 [2018-09-23 19:36:02,352 INFO L226 Difference]: Without dead ends: 111 [2018-09-23 19:36:02,353 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:36:02,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2018-09-23 19:36:02,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2018-09-23 19:36:02,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2018-09-23 19:36:02,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2018-09-23 19:36:02,374 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 87 [2018-09-23 19:36:02,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:02,374 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2018-09-23 19:36:02,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:36:02,375 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2018-09-23 19:36:02,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2018-09-23 19:36:02,376 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:02,377 INFO L375 BasicCegarLoop]: trace histogram [80, 8, 8, 1, 1, 1] [2018-09-23 19:36:02,377 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:02,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:02,377 INFO L82 PathProgramCache]: Analyzing trace with hash 558484307, now seen corresponding path program 11 times [2018-09-23 19:36:02,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:02,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:02,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:02,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:02,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3864 backedges. 0 proven. 3424 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-09-23 19:36:02,733 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:02,733 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:02,743 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:02,917 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2018-09-23 19:36:02,917 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:02,922 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3864 backedges. 0 proven. 3424 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-09-23 19:36:02,964 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:02,964 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-09-23 19:36:02,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:36:02,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:36:02,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:36:02,965 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand 11 states. [2018-09-23 19:36:03,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:03,156 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2018-09-23 19:36:03,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:36:03,156 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 99 [2018-09-23 19:36:03,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:03,157 INFO L225 Difference]: With dead ends: 125 [2018-09-23 19:36:03,157 INFO L226 Difference]: Without dead ends: 123 [2018-09-23 19:36:03,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:36:03,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-23 19:36:03,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2018-09-23 19:36:03,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-09-23 19:36:03,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2018-09-23 19:36:03,180 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 99 [2018-09-23 19:36:03,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:03,181 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2018-09-23 19:36:03,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:36:03,181 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2018-09-23 19:36:03,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-09-23 19:36:03,183 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:03,183 INFO L375 BasicCegarLoop]: trace histogram [90, 9, 9, 1, 1, 1] [2018-09-23 19:36:03,183 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:03,183 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:03,184 INFO L82 PathProgramCache]: Analyzing trace with hash -2005161315, now seen corresponding path program 12 times [2018-09-23 19:36:03,184 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:03,184 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:03,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:03,185 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:03,185 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:03,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:03,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-09-23 19:36:03,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:03,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:03,422 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:03,654 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2018-09-23 19:36:03,654 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:03,658 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4896 backedges. 0 proven. 4401 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2018-09-23 19:36:03,723 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:03,724 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2018-09-23 19:36:03,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:36:03,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:36:03,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:36:03,725 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand 12 states. [2018-09-23 19:36:03,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:03,971 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2018-09-23 19:36:03,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:36:03,973 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2018-09-23 19:36:03,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:03,975 INFO L225 Difference]: With dead ends: 137 [2018-09-23 19:36:03,975 INFO L226 Difference]: Without dead ends: 135 [2018-09-23 19:36:03,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:36:03,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2018-09-23 19:36:04,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 124. [2018-09-23 19:36:04,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2018-09-23 19:36:04,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2018-09-23 19:36:04,018 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 111 [2018-09-23 19:36:04,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:04,018 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2018-09-23 19:36:04,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:36:04,019 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2018-09-23 19:36:04,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2018-09-23 19:36:04,025 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:04,026 INFO L375 BasicCegarLoop]: trace histogram [100, 10, 10, 1, 1, 1] [2018-09-23 19:36:04,026 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:04,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:04,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1028199705, now seen corresponding path program 13 times [2018-09-23 19:36:04,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:04,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:04,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:04,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:04,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-09-23 19:36:04,493 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:04,494 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:04,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:04,574 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6050 backedges. 0 proven. 5500 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-09-23 19:36:04,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:04,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-09-23 19:36:04,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:36:04,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:36:04,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:36:04,618 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand 13 states. [2018-09-23 19:36:04,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:04,718 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2018-09-23 19:36:04,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:36:04,718 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 123 [2018-09-23 19:36:04,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:04,720 INFO L225 Difference]: With dead ends: 149 [2018-09-23 19:36:04,720 INFO L226 Difference]: Without dead ends: 147 [2018-09-23 19:36:04,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:36:04,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-23 19:36:04,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2018-09-23 19:36:04,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-09-23 19:36:04,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2018-09-23 19:36:04,745 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 123 [2018-09-23 19:36:04,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:04,746 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2018-09-23 19:36:04,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:36:04,746 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2018-09-23 19:36:04,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-09-23 19:36:04,747 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:04,747 INFO L375 BasicCegarLoop]: trace histogram [110, 11, 11, 1, 1, 1] [2018-09-23 19:36:04,747 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:04,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:04,748 INFO L82 PathProgramCache]: Analyzing trace with hash 804391985, now seen corresponding path program 14 times [2018-09-23 19:36:04,748 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:04,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:04,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:04,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:04,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:05,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-09-23 19:36:05,023 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:05,023 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:05,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:05,123 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:05,124 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:05,127 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7326 backedges. 0 proven. 6721 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2018-09-23 19:36:05,184 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:05,184 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2018-09-23 19:36:05,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:36:05,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:36:05,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:36:05,185 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand 14 states. [2018-09-23 19:36:05,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:05,281 INFO L93 Difference]: Finished difference Result 161 states and 174 transitions. [2018-09-23 19:36:05,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:36:05,281 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 135 [2018-09-23 19:36:05,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:05,283 INFO L225 Difference]: With dead ends: 161 [2018-09-23 19:36:05,283 INFO L226 Difference]: Without dead ends: 159 [2018-09-23 19:36:05,283 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:36:05,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-09-23 19:36:05,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2018-09-23 19:36:05,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-09-23 19:36:05,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 160 transitions. [2018-09-23 19:36:05,306 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 160 transitions. Word has length 135 [2018-09-23 19:36:05,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:05,307 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 160 transitions. [2018-09-23 19:36:05,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:36:05,307 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 160 transitions. [2018-09-23 19:36:05,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-09-23 19:36:05,308 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:05,308 INFO L375 BasicCegarLoop]: trace histogram [120, 12, 12, 1, 1, 1] [2018-09-23 19:36:05,309 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:05,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:05,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1919127163, now seen corresponding path program 15 times [2018-09-23 19:36:05,309 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:05,309 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:05,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:05,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:05,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8724 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-09-23 19:36:05,672 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:05,672 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:05,680 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:05,819 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 73 check-sat command(s) [2018-09-23 19:36:05,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:05,822 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:05,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8724 backedges. 0 proven. 8064 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-09-23 19:36:05,867 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:05,867 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-09-23 19:36:05,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:36:05,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:36:05,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:36:05,868 INFO L87 Difference]: Start difference. First operand 148 states and 160 transitions. Second operand 15 states. [2018-09-23 19:36:06,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:06,017 INFO L93 Difference]: Finished difference Result 173 states and 187 transitions. [2018-09-23 19:36:06,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-09-23 19:36:06,017 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 147 [2018-09-23 19:36:06,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:06,019 INFO L225 Difference]: With dead ends: 173 [2018-09-23 19:36:06,019 INFO L226 Difference]: Without dead ends: 171 [2018-09-23 19:36:06,019 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:36:06,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-23 19:36:06,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 160. [2018-09-23 19:36:06,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2018-09-23 19:36:06,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2018-09-23 19:36:06,052 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 147 [2018-09-23 19:36:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:06,052 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2018-09-23 19:36:06,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:36:06,053 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2018-09-23 19:36:06,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2018-09-23 19:36:06,054 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:06,054 INFO L375 BasicCegarLoop]: trace histogram [130, 13, 13, 1, 1, 1] [2018-09-23 19:36:06,055 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:06,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:06,055 INFO L82 PathProgramCache]: Analyzing trace with hash 243397061, now seen corresponding path program 16 times [2018-09-23 19:36:06,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:06,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:06,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:06,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:06,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 10244 backedges. 0 proven. 9529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-09-23 19:36:06,447 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:06,447 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:06,456 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:06,563 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:06,564 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:06,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10244 backedges. 0 proven. 9529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2018-09-23 19:36:06,654 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:06,654 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-09-23 19:36:06,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:36:06,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:36:06,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:36:06,656 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 16 states. [2018-09-23 19:36:06,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:06,801 INFO L93 Difference]: Finished difference Result 185 states and 200 transitions. [2018-09-23 19:36:06,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-09-23 19:36:06,802 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 159 [2018-09-23 19:36:06,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:06,803 INFO L225 Difference]: With dead ends: 185 [2018-09-23 19:36:06,803 INFO L226 Difference]: Without dead ends: 183 [2018-09-23 19:36:06,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:36:06,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-09-23 19:36:06,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 172. [2018-09-23 19:36:06,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2018-09-23 19:36:06,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 186 transitions. [2018-09-23 19:36:06,837 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 186 transitions. Word has length 159 [2018-09-23 19:36:06,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:06,837 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 186 transitions. [2018-09-23 19:36:06,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:36:06,838 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 186 transitions. [2018-09-23 19:36:06,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2018-09-23 19:36:06,840 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:06,840 INFO L375 BasicCegarLoop]: trace histogram [140, 14, 14, 1, 1, 1] [2018-09-23 19:36:06,840 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:06,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:06,840 INFO L82 PathProgramCache]: Analyzing trace with hash 184792591, now seen corresponding path program 17 times [2018-09-23 19:36:06,841 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:06,841 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:06,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:06,842 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:06,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:06,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11886 backedges. 0 proven. 11116 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-09-23 19:36:07,201 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:07,201 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:07,217 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:07,455 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2018-09-23 19:36:07,455 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:07,459 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11886 backedges. 0 proven. 11116 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-09-23 19:36:07,525 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:07,526 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-09-23 19:36:07,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:36:07,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:36:07,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:36:07,527 INFO L87 Difference]: Start difference. First operand 172 states and 186 transitions. Second operand 17 states. [2018-09-23 19:36:07,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:07,746 INFO L93 Difference]: Finished difference Result 197 states and 213 transitions. [2018-09-23 19:36:07,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:36:07,747 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 171 [2018-09-23 19:36:07,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:07,748 INFO L225 Difference]: With dead ends: 197 [2018-09-23 19:36:07,748 INFO L226 Difference]: Without dead ends: 195 [2018-09-23 19:36:07,749 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:36:07,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-23 19:36:07,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 184. [2018-09-23 19:36:07,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2018-09-23 19:36:07,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 199 transitions. [2018-09-23 19:36:07,784 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 199 transitions. Word has length 171 [2018-09-23 19:36:07,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:07,785 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 199 transitions. [2018-09-23 19:36:07,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:36:07,785 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 199 transitions. [2018-09-23 19:36:07,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2018-09-23 19:36:07,786 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:07,786 INFO L375 BasicCegarLoop]: trace histogram [150, 15, 15, 1, 1, 1] [2018-09-23 19:36:07,786 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:07,787 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:07,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1864410279, now seen corresponding path program 18 times [2018-09-23 19:36:07,787 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:07,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:07,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:07,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:07,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-09-23 19:36:08,752 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:08,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:08,767 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:09,203 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 86 check-sat command(s) [2018-09-23 19:36:09,203 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:09,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 13650 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2018-09-23 19:36:09,265 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:09,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-09-23 19:36:09,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:36:09,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:36:09,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:36:09,267 INFO L87 Difference]: Start difference. First operand 184 states and 199 transitions. Second operand 18 states. [2018-09-23 19:36:09,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:09,437 INFO L93 Difference]: Finished difference Result 209 states and 226 transitions. [2018-09-23 19:36:09,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:36:09,437 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 183 [2018-09-23 19:36:09,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:09,438 INFO L225 Difference]: With dead ends: 209 [2018-09-23 19:36:09,438 INFO L226 Difference]: Without dead ends: 207 [2018-09-23 19:36:09,439 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:36:09,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2018-09-23 19:36:09,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 196. [2018-09-23 19:36:09,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2018-09-23 19:36:09,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 212 transitions. [2018-09-23 19:36:09,473 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 212 transitions. Word has length 183 [2018-09-23 19:36:09,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:09,473 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 212 transitions. [2018-09-23 19:36:09,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:36:09,473 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 212 transitions. [2018-09-23 19:36:09,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2018-09-23 19:36:09,474 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:09,474 INFO L375 BasicCegarLoop]: trace histogram [160, 16, 16, 1, 1, 1] [2018-09-23 19:36:09,475 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:09,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:09,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1957994077, now seen corresponding path program 19 times [2018-09-23 19:36:09,475 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:09,475 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:09,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:09,476 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:09,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 15536 backedges. 0 proven. 14656 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-09-23 19:36:09,920 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:09,920 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:09,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:10,041 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:10,073 INFO L134 CoverageAnalysis]: Checked inductivity of 15536 backedges. 0 proven. 14656 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-09-23 19:36:10,094 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:10,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-09-23 19:36:10,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:36:10,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:36:10,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:36:10,095 INFO L87 Difference]: Start difference. First operand 196 states and 212 transitions. Second operand 19 states. [2018-09-23 19:36:10,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:10,221 INFO L93 Difference]: Finished difference Result 221 states and 239 transitions. [2018-09-23 19:36:10,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-09-23 19:36:10,221 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 195 [2018-09-23 19:36:10,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:10,222 INFO L225 Difference]: With dead ends: 221 [2018-09-23 19:36:10,222 INFO L226 Difference]: Without dead ends: 219 [2018-09-23 19:36:10,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:36:10,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-23 19:36:10,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 208. [2018-09-23 19:36:10,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-09-23 19:36:10,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 225 transitions. [2018-09-23 19:36:10,259 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 225 transitions. Word has length 195 [2018-09-23 19:36:10,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:10,259 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 225 transitions. [2018-09-23 19:36:10,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:36:10,259 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 225 transitions. [2018-09-23 19:36:10,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-09-23 19:36:10,260 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:10,260 INFO L375 BasicCegarLoop]: trace histogram [170, 17, 17, 1, 1, 1] [2018-09-23 19:36:10,261 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:10,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:10,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1203652845, now seen corresponding path program 20 times [2018-09-23 19:36:10,261 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:10,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:10,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:10,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:10,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 17544 backedges. 0 proven. 16609 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-09-23 19:36:10,904 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:10,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:10,913 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:11,038 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:11,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:11,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 17544 backedges. 0 proven. 16609 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2018-09-23 19:36:11,124 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:11,125 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2018-09-23 19:36:11,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:36:11,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:36:11,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:36:11,126 INFO L87 Difference]: Start difference. First operand 208 states and 225 transitions. Second operand 20 states. [2018-09-23 19:36:11,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:11,284 INFO L93 Difference]: Finished difference Result 233 states and 252 transitions. [2018-09-23 19:36:11,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:36:11,286 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 207 [2018-09-23 19:36:11,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:11,288 INFO L225 Difference]: With dead ends: 233 [2018-09-23 19:36:11,288 INFO L226 Difference]: Without dead ends: 231 [2018-09-23 19:36:11,289 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:36:11,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2018-09-23 19:36:11,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 220. [2018-09-23 19:36:11,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2018-09-23 19:36:11,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 238 transitions. [2018-09-23 19:36:11,335 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 238 transitions. Word has length 207 [2018-09-23 19:36:11,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:11,336 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 238 transitions. [2018-09-23 19:36:11,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:36:11,336 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 238 transitions. [2018-09-23 19:36:11,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2018-09-23 19:36:11,338 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:11,338 INFO L375 BasicCegarLoop]: trace histogram [180, 18, 18, 1, 1, 1] [2018-09-23 19:36:11,338 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:11,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:11,339 INFO L82 PathProgramCache]: Analyzing trace with hash 367956279, now seen corresponding path program 21 times [2018-09-23 19:36:11,339 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:11,339 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:11,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:11,340 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:11,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 19674 backedges. 0 proven. 18684 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-23 19:36:12,220 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:12,220 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:12,229 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:12,476 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 109 check-sat command(s) [2018-09-23 19:36:12,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:12,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:12,527 INFO L134 CoverageAnalysis]: Checked inductivity of 19674 backedges. 0 proven. 18684 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-23 19:36:12,547 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:12,548 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-09-23 19:36:12,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:36:12,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:36:12,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:36:12,549 INFO L87 Difference]: Start difference. First operand 220 states and 238 transitions. Second operand 21 states. [2018-09-23 19:36:12,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:12,686 INFO L93 Difference]: Finished difference Result 245 states and 265 transitions. [2018-09-23 19:36:12,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-09-23 19:36:12,686 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 219 [2018-09-23 19:36:12,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:12,687 INFO L225 Difference]: With dead ends: 245 [2018-09-23 19:36:12,687 INFO L226 Difference]: Without dead ends: 243 [2018-09-23 19:36:12,688 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:36:12,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-23 19:36:12,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 232. [2018-09-23 19:36:12,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2018-09-23 19:36:12,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 251 transitions. [2018-09-23 19:36:12,739 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 251 transitions. Word has length 219 [2018-09-23 19:36:12,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:12,739 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 251 transitions. [2018-09-23 19:36:12,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:36:12,739 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 251 transitions. [2018-09-23 19:36:12,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2018-09-23 19:36:12,741 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:12,741 INFO L375 BasicCegarLoop]: trace histogram [190, 19, 19, 1, 1, 1] [2018-09-23 19:36:12,741 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:12,741 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:12,741 INFO L82 PathProgramCache]: Analyzing trace with hash -405620095, now seen corresponding path program 22 times [2018-09-23 19:36:12,741 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:12,742 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:12,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:12,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:12,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 21926 backedges. 0 proven. 20881 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2018-09-23 19:36:13,803 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:13,803 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:13,814 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:13,930 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:13,931 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:13,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 21926 backedges. 0 proven. 20881 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2018-09-23 19:36:14,000 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:14,000 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2018-09-23 19:36:14,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:36:14,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:36:14,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:36:14,001 INFO L87 Difference]: Start difference. First operand 232 states and 251 transitions. Second operand 22 states. [2018-09-23 19:36:14,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:14,179 INFO L93 Difference]: Finished difference Result 257 states and 278 transitions. [2018-09-23 19:36:14,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 19:36:14,181 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 231 [2018-09-23 19:36:14,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:14,182 INFO L225 Difference]: With dead ends: 257 [2018-09-23 19:36:14,183 INFO L226 Difference]: Without dead ends: 255 [2018-09-23 19:36:14,183 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:36:14,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2018-09-23 19:36:14,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 244. [2018-09-23 19:36:14,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2018-09-23 19:36:14,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 264 transitions. [2018-09-23 19:36:14,251 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 264 transitions. Word has length 231 [2018-09-23 19:36:14,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:14,252 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 264 transitions. [2018-09-23 19:36:14,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:36:14,252 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 264 transitions. [2018-09-23 19:36:14,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2018-09-23 19:36:14,253 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:14,253 INFO L375 BasicCegarLoop]: trace histogram [200, 20, 20, 1, 1, 1] [2018-09-23 19:36:14,254 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:14,254 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:14,254 INFO L82 PathProgramCache]: Analyzing trace with hash -241089333, now seen corresponding path program 23 times [2018-09-23 19:36:14,254 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:14,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:14,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:14,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:14,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:14,887 INFO L134 CoverageAnalysis]: Checked inductivity of 24300 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2018-09-23 19:36:14,887 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:14,887 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:14,894 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:15,266 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 121 check-sat command(s) [2018-09-23 19:36:15,266 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:15,271 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 24300 backedges. 0 proven. 23200 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2018-09-23 19:36:15,343 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:15,343 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2018-09-23 19:36:15,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 19:36:15,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 19:36:15,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:36:15,344 INFO L87 Difference]: Start difference. First operand 244 states and 264 transitions. Second operand 23 states. [2018-09-23 19:36:15,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:15,507 INFO L93 Difference]: Finished difference Result 269 states and 291 transitions. [2018-09-23 19:36:15,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-09-23 19:36:15,508 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 243 [2018-09-23 19:36:15,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:15,509 INFO L225 Difference]: With dead ends: 269 [2018-09-23 19:36:15,509 INFO L226 Difference]: Without dead ends: 267 [2018-09-23 19:36:15,510 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:36:15,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-23 19:36:15,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 256. [2018-09-23 19:36:15,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2018-09-23 19:36:15,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 277 transitions. [2018-09-23 19:36:15,566 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 277 transitions. Word has length 243 [2018-09-23 19:36:15,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:15,567 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 277 transitions. [2018-09-23 19:36:15,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 19:36:15,567 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 277 transitions. [2018-09-23 19:36:15,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2018-09-23 19:36:15,568 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:15,568 INFO L375 BasicCegarLoop]: trace histogram [210, 21, 21, 1, 1, 1] [2018-09-23 19:36:15,568 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:15,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:15,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1238413333, now seen corresponding path program 24 times [2018-09-23 19:36:15,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:15,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:15,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:15,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:15,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 25641 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-09-23 19:36:16,417 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:16,417 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:16,425 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:16,739 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 123 check-sat command(s) [2018-09-23 19:36:16,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:16,746 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 26796 backedges. 0 proven. 25641 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2018-09-23 19:36:16,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:16,823 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2018-09-23 19:36:16,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:36:16,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:36:16,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:36:16,825 INFO L87 Difference]: Start difference. First operand 256 states and 277 transitions. Second operand 24 states. [2018-09-23 19:36:17,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:17,374 INFO L93 Difference]: Finished difference Result 281 states and 304 transitions. [2018-09-23 19:36:17,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:36:17,375 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 255 [2018-09-23 19:36:17,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:17,377 INFO L225 Difference]: With dead ends: 281 [2018-09-23 19:36:17,377 INFO L226 Difference]: Without dead ends: 279 [2018-09-23 19:36:17,378 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:36:17,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2018-09-23 19:36:17,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 268. [2018-09-23 19:36:17,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-09-23 19:36:17,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 290 transitions. [2018-09-23 19:36:17,477 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 290 transitions. Word has length 255 [2018-09-23 19:36:17,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:17,478 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 290 transitions. [2018-09-23 19:36:17,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-09-23 19:36:17,478 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 290 transitions. [2018-09-23 19:36:17,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-09-23 19:36:17,479 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:17,480 INFO L375 BasicCegarLoop]: trace histogram [220, 22, 22, 1, 1, 1] [2018-09-23 19:36:17,480 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:17,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:17,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1994949537, now seen corresponding path program 25 times [2018-09-23 19:36:17,481 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:17,481 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:17,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:17,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:17,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-09-23 19:36:19,211 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:19,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:19,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:19,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 29414 backedges. 0 proven. 28204 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2018-09-23 19:36:19,469 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:19,469 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-09-23 19:36:19,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-09-23 19:36:19,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-09-23 19:36:19,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:36:19,471 INFO L87 Difference]: Start difference. First operand 268 states and 290 transitions. Second operand 25 states. [2018-09-23 19:36:20,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:20,438 INFO L93 Difference]: Finished difference Result 293 states and 317 transitions. [2018-09-23 19:36:20,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:36:20,438 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 267 [2018-09-23 19:36:20,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:20,440 INFO L225 Difference]: With dead ends: 293 [2018-09-23 19:36:20,440 INFO L226 Difference]: Without dead ends: 291 [2018-09-23 19:36:20,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:36:20,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2018-09-23 19:36:20,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 280. [2018-09-23 19:36:20,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2018-09-23 19:36:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 303 transitions. [2018-09-23 19:36:20,538 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 303 transitions. Word has length 267 [2018-09-23 19:36:20,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:20,539 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 303 transitions. [2018-09-23 19:36:20,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-09-23 19:36:20,539 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 303 transitions. [2018-09-23 19:36:20,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2018-09-23 19:36:20,541 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:20,541 INFO L375 BasicCegarLoop]: trace histogram [230, 23, 23, 1, 1, 1] [2018-09-23 19:36:20,541 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:20,541 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:20,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1785473449, now seen corresponding path program 26 times [2018-09-23 19:36:20,542 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:20,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:20,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:20,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:20,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:20,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 32154 backedges. 0 proven. 30889 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2018-09-23 19:36:22,536 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:22,537 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:22,545 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:22,722 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:22,722 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:22,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 32154 backedges. 0 proven. 30889 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2018-09-23 19:36:22,823 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:22,824 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2018-09-23 19:36:22,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-09-23 19:36:22,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-09-23 19:36:22,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:36:22,825 INFO L87 Difference]: Start difference. First operand 280 states and 303 transitions. Second operand 26 states. [2018-09-23 19:36:23,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:23,137 INFO L93 Difference]: Finished difference Result 305 states and 330 transitions. [2018-09-23 19:36:23,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:36:23,138 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 279 [2018-09-23 19:36:23,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:23,140 INFO L225 Difference]: With dead ends: 305 [2018-09-23 19:36:23,140 INFO L226 Difference]: Without dead ends: 303 [2018-09-23 19:36:23,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:36:23,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-09-23 19:36:23,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 292. [2018-09-23 19:36:23,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2018-09-23 19:36:23,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 316 transitions. [2018-09-23 19:36:23,239 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 316 transitions. Word has length 279 [2018-09-23 19:36:23,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:23,239 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 316 transitions. [2018-09-23 19:36:23,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-09-23 19:36:23,239 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 316 transitions. [2018-09-23 19:36:23,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2018-09-23 19:36:23,241 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:23,241 INFO L375 BasicCegarLoop]: trace histogram [240, 24, 24, 1, 1, 1] [2018-09-23 19:36:23,241 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:23,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:23,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1795504115, now seen corresponding path program 27 times [2018-09-23 19:36:23,242 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:23,242 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:23,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:23,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:23,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 35016 backedges. 0 proven. 33696 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-09-23 19:36:24,029 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:24,030 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:24,039 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:24,610 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 145 check-sat command(s) [2018-09-23 19:36:24,610 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:24,619 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 35016 backedges. 0 proven. 33696 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-09-23 19:36:24,725 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:24,726 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2018-09-23 19:36:24,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-09-23 19:36:24,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-09-23 19:36:24,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:36:24,727 INFO L87 Difference]: Start difference. First operand 292 states and 316 transitions. Second operand 27 states. [2018-09-23 19:36:24,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:24,939 INFO L93 Difference]: Finished difference Result 317 states and 343 transitions. [2018-09-23 19:36:24,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:36:24,939 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 291 [2018-09-23 19:36:24,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:24,941 INFO L225 Difference]: With dead ends: 317 [2018-09-23 19:36:24,941 INFO L226 Difference]: Without dead ends: 315 [2018-09-23 19:36:24,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:36:24,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-09-23 19:36:25,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 304. [2018-09-23 19:36:25,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2018-09-23 19:36:25,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 329 transitions. [2018-09-23 19:36:25,058 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 329 transitions. Word has length 291 [2018-09-23 19:36:25,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:25,059 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 329 transitions. [2018-09-23 19:36:25,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-09-23 19:36:25,059 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 329 transitions. [2018-09-23 19:36:25,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2018-09-23 19:36:25,063 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:25,063 INFO L375 BasicCegarLoop]: trace histogram [250, 25, 25, 1, 1, 1] [2018-09-23 19:36:25,063 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:25,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:25,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1784227645, now seen corresponding path program 28 times [2018-09-23 19:36:25,064 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:25,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:25,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:25,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:25,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-09-23 19:36:25,853 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:25,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:25,862 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:26,016 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:26,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:26,023 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 38000 backedges. 0 proven. 36625 refuted. 0 times theorem prover too weak. 1375 trivial. 0 not checked. [2018-09-23 19:36:26,186 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:26,186 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2018-09-23 19:36:26,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-09-23 19:36:26,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-09-23 19:36:26,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:36:26,187 INFO L87 Difference]: Start difference. First operand 304 states and 329 transitions. Second operand 28 states. [2018-09-23 19:36:26,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:26,414 INFO L93 Difference]: Finished difference Result 329 states and 356 transitions. [2018-09-23 19:36:26,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-09-23 19:36:26,414 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 303 [2018-09-23 19:36:26,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:26,416 INFO L225 Difference]: With dead ends: 329 [2018-09-23 19:36:26,416 INFO L226 Difference]: Without dead ends: 327 [2018-09-23 19:36:26,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2018-09-23 19:36:26,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2018-09-23 19:36:26,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 316. [2018-09-23 19:36:26,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-09-23 19:36:26,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 342 transitions. [2018-09-23 19:36:26,511 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 342 transitions. Word has length 303 [2018-09-23 19:36:26,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:26,511 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 342 transitions. [2018-09-23 19:36:26,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-09-23 19:36:26,511 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 342 transitions. [2018-09-23 19:36:26,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2018-09-23 19:36:26,513 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:26,513 INFO L375 BasicCegarLoop]: trace histogram [260, 26, 26, 1, 1, 1] [2018-09-23 19:36:26,513 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:26,514 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:26,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1243510663, now seen corresponding path program 29 times [2018-09-23 19:36:26,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:26,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:26,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:26,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:26,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 41106 backedges. 0 proven. 39676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-09-23 19:36:27,427 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:27,427 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:27,434 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:27,843 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 157 check-sat command(s) [2018-09-23 19:36:27,843 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:27,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:27,931 INFO L134 CoverageAnalysis]: Checked inductivity of 41106 backedges. 0 proven. 39676 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-09-23 19:36:27,952 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:27,952 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-09-23 19:36:27,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-09-23 19:36:27,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-09-23 19:36:27,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:36:27,953 INFO L87 Difference]: Start difference. First operand 316 states and 342 transitions. Second operand 29 states. [2018-09-23 19:36:28,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:28,169 INFO L93 Difference]: Finished difference Result 341 states and 369 transitions. [2018-09-23 19:36:28,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:36:28,169 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 315 [2018-09-23 19:36:28,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:28,171 INFO L225 Difference]: With dead ends: 341 [2018-09-23 19:36:28,171 INFO L226 Difference]: Without dead ends: 339 [2018-09-23 19:36:28,172 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2018-09-23 19:36:28,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-09-23 19:36:28,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 328. [2018-09-23 19:36:28,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-09-23 19:36:28,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 355 transitions. [2018-09-23 19:36:28,267 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 355 transitions. Word has length 315 [2018-09-23 19:36:28,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:28,267 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 355 transitions. [2018-09-23 19:36:28,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-09-23 19:36:28,267 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 355 transitions. [2018-09-23 19:36:28,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-09-23 19:36:28,269 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:28,269 INFO L375 BasicCegarLoop]: trace histogram [270, 27, 27, 1, 1, 1] [2018-09-23 19:36:28,269 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:28,269 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:28,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1907644207, now seen corresponding path program 30 times [2018-09-23 19:36:28,270 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:28,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:28,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:28,270 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:28,270 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 44334 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-09-23 19:36:29,913 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:29,913 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:29,920 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:30,653 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 158 check-sat command(s) [2018-09-23 19:36:30,653 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:30,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 44334 backedges. 0 proven. 42849 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2018-09-23 19:36:30,877 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:30,877 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2018-09-23 19:36:30,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-09-23 19:36:30,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-09-23 19:36:30,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:36:30,878 INFO L87 Difference]: Start difference. First operand 328 states and 355 transitions. Second operand 30 states. [2018-09-23 19:36:31,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:31,195 INFO L93 Difference]: Finished difference Result 353 states and 382 transitions. [2018-09-23 19:36:31,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-09-23 19:36:31,195 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 327 [2018-09-23 19:36:31,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:31,197 INFO L225 Difference]: With dead ends: 353 [2018-09-23 19:36:31,197 INFO L226 Difference]: Without dead ends: 351 [2018-09-23 19:36:31,198 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2018-09-23 19:36:31,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-09-23 19:36:31,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 340. [2018-09-23 19:36:31,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2018-09-23 19:36:31,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 368 transitions. [2018-09-23 19:36:31,297 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 368 transitions. Word has length 327 [2018-09-23 19:36:31,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:31,298 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 368 transitions. [2018-09-23 19:36:31,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-09-23 19:36:31,298 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 368 transitions. [2018-09-23 19:36:31,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2018-09-23 19:36:31,299 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:31,299 INFO L375 BasicCegarLoop]: trace histogram [280, 28, 28, 1, 1, 1] [2018-09-23 19:36:31,300 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:31,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:31,300 INFO L82 PathProgramCache]: Analyzing trace with hash -48809189, now seen corresponding path program 31 times [2018-09-23 19:36:31,300 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:31,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:31,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:31,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:31,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 47684 backedges. 0 proven. 46144 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-09-23 19:36:32,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:32,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:32,223 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:32,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 47684 backedges. 0 proven. 46144 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-09-23 19:36:32,518 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:32,519 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-09-23 19:36:32,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-09-23 19:36:32,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-09-23 19:36:32,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:36:32,520 INFO L87 Difference]: Start difference. First operand 340 states and 368 transitions. Second operand 31 states. [2018-09-23 19:36:32,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:32,763 INFO L93 Difference]: Finished difference Result 365 states and 395 transitions. [2018-09-23 19:36:32,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:36:32,764 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 339 [2018-09-23 19:36:32,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:32,765 INFO L225 Difference]: With dead ends: 365 [2018-09-23 19:36:32,765 INFO L226 Difference]: Without dead ends: 363 [2018-09-23 19:36:32,766 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2018-09-23 19:36:32,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-09-23 19:36:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 352. [2018-09-23 19:36:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-09-23 19:36:32,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 381 transitions. [2018-09-23 19:36:32,894 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 381 transitions. Word has length 339 [2018-09-23 19:36:32,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:32,895 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 381 transitions. [2018-09-23 19:36:32,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-09-23 19:36:32,895 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 381 transitions. [2018-09-23 19:36:32,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2018-09-23 19:36:32,897 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:32,897 INFO L375 BasicCegarLoop]: trace histogram [290, 29, 29, 1, 1, 1] [2018-09-23 19:36:32,897 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:32,898 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:32,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1056419429, now seen corresponding path program 32 times [2018-09-23 19:36:32,898 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:32,898 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:32,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:32,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:32,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 51156 backedges. 0 proven. 49561 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2018-09-23 19:36:33,519 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:33,519 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:33,526 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:33,711 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:33,712 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:33,717 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 51156 backedges. 0 proven. 49561 refuted. 0 times theorem prover too weak. 1595 trivial. 0 not checked. [2018-09-23 19:36:33,918 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:33,919 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2018-09-23 19:36:33,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-09-23 19:36:33,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-09-23 19:36:33,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:36:33,921 INFO L87 Difference]: Start difference. First operand 352 states and 381 transitions. Second operand 32 states. [2018-09-23 19:36:34,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:34,218 INFO L93 Difference]: Finished difference Result 377 states and 408 transitions. [2018-09-23 19:36:34,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:36:34,219 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 351 [2018-09-23 19:36:34,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:34,220 INFO L225 Difference]: With dead ends: 377 [2018-09-23 19:36:34,220 INFO L226 Difference]: Without dead ends: 375 [2018-09-23 19:36:34,221 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:36:34,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2018-09-23 19:36:34,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 364. [2018-09-23 19:36:34,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-09-23 19:36:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 394 transitions. [2018-09-23 19:36:34,333 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 394 transitions. Word has length 351 [2018-09-23 19:36:34,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:34,334 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 394 transitions. [2018-09-23 19:36:34,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-09-23 19:36:34,334 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 394 transitions. [2018-09-23 19:36:34,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2018-09-23 19:36:34,336 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:34,336 INFO L375 BasicCegarLoop]: trace histogram [300, 30, 30, 1, 1, 1] [2018-09-23 19:36:34,336 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:34,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:34,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2124645039, now seen corresponding path program 33 times [2018-09-23 19:36:34,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:34,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:34,337 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:34,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:34,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:34,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:35,202 INFO L134 CoverageAnalysis]: Checked inductivity of 54750 backedges. 0 proven. 53100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-09-23 19:36:35,203 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:35,203 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:35,210 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:35,766 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 181 check-sat command(s) [2018-09-23 19:36:35,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:35,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 54750 backedges. 0 proven. 53100 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2018-09-23 19:36:35,939 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:35,940 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2018-09-23 19:36:35,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-09-23 19:36:35,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-09-23 19:36:35,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:36:35,941 INFO L87 Difference]: Start difference. First operand 364 states and 394 transitions. Second operand 33 states. [2018-09-23 19:36:36,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:36,955 INFO L93 Difference]: Finished difference Result 389 states and 421 transitions. [2018-09-23 19:36:36,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-09-23 19:36:36,955 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 363 [2018-09-23 19:36:36,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:36,957 INFO L225 Difference]: With dead ends: 389 [2018-09-23 19:36:36,957 INFO L226 Difference]: Without dead ends: 387 [2018-09-23 19:36:36,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:36:36,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2018-09-23 19:36:37,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 376. [2018-09-23 19:36:37,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2018-09-23 19:36:37,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 407 transitions. [2018-09-23 19:36:37,087 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 407 transitions. Word has length 363 [2018-09-23 19:36:37,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:37,087 INFO L480 AbstractCegarLoop]: Abstraction has 376 states and 407 transitions. [2018-09-23 19:36:37,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-09-23 19:36:37,088 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 407 transitions. [2018-09-23 19:36:37,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2018-09-23 19:36:37,089 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:37,090 INFO L375 BasicCegarLoop]: trace histogram [310, 31, 31, 1, 1, 1] [2018-09-23 19:36:37,090 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:37,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:37,090 INFO L82 PathProgramCache]: Analyzing trace with hash 152123385, now seen corresponding path program 34 times [2018-09-23 19:36:37,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:37,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:37,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:37,091 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:37,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 58466 backedges. 0 proven. 56761 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-09-23 19:36:38,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:38,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:38,220 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:38,452 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:38,452 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:38,461 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 58466 backedges. 0 proven. 56761 refuted. 0 times theorem prover too weak. 1705 trivial. 0 not checked. [2018-09-23 19:36:38,635 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:38,635 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2018-09-23 19:36:38,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-09-23 19:36:38,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-09-23 19:36:38,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:36:38,636 INFO L87 Difference]: Start difference. First operand 376 states and 407 transitions. Second operand 34 states. [2018-09-23 19:36:38,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:38,940 INFO L93 Difference]: Finished difference Result 401 states and 434 transitions. [2018-09-23 19:36:38,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-09-23 19:36:38,941 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 375 [2018-09-23 19:36:38,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:38,943 INFO L225 Difference]: With dead ends: 401 [2018-09-23 19:36:38,943 INFO L226 Difference]: Without dead ends: 399 [2018-09-23 19:36:38,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:36:38,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-09-23 19:36:39,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 388. [2018-09-23 19:36:39,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2018-09-23 19:36:39,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 420 transitions. [2018-09-23 19:36:39,082 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 420 transitions. Word has length 375 [2018-09-23 19:36:39,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:39,082 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 420 transitions. [2018-09-23 19:36:39,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-09-23 19:36:39,082 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 420 transitions. [2018-09-23 19:36:39,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2018-09-23 19:36:39,084 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:39,084 INFO L375 BasicCegarLoop]: trace histogram [320, 32, 32, 1, 1, 1] [2018-09-23 19:36:39,084 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:39,085 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:39,085 INFO L82 PathProgramCache]: Analyzing trace with hash -310948285, now seen corresponding path program 35 times [2018-09-23 19:36:39,085 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:39,085 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:39,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:39,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:39,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 62304 backedges. 0 proven. 60544 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-09-23 19:36:39,813 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:39,813 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:39,822 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:40,456 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 193 check-sat command(s) [2018-09-23 19:36:40,456 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:40,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 62304 backedges. 0 proven. 60544 refuted. 0 times theorem prover too weak. 1760 trivial. 0 not checked. [2018-09-23 19:36:40,580 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:40,581 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-09-23 19:36:40,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-09-23 19:36:40,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-09-23 19:36:40,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:36:40,582 INFO L87 Difference]: Start difference. First operand 388 states and 420 transitions. Second operand 35 states. [2018-09-23 19:36:40,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:40,882 INFO L93 Difference]: Finished difference Result 413 states and 447 transitions. [2018-09-23 19:36:40,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-09-23 19:36:40,882 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 387 [2018-09-23 19:36:40,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:40,884 INFO L225 Difference]: With dead ends: 413 [2018-09-23 19:36:40,884 INFO L226 Difference]: Without dead ends: 411 [2018-09-23 19:36:40,884 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:36:40,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2018-09-23 19:36:41,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 400. [2018-09-23 19:36:41,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2018-09-23 19:36:41,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 433 transitions. [2018-09-23 19:36:41,030 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 433 transitions. Word has length 387 [2018-09-23 19:36:41,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:41,030 INFO L480 AbstractCegarLoop]: Abstraction has 400 states and 433 transitions. [2018-09-23 19:36:41,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-09-23 19:36:41,030 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 433 transitions. [2018-09-23 19:36:41,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2018-09-23 19:36:41,032 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:41,033 INFO L375 BasicCegarLoop]: trace histogram [330, 33, 33, 1, 1, 1] [2018-09-23 19:36:41,033 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:41,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:41,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1655945843, now seen corresponding path program 36 times [2018-09-23 19:36:41,033 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:41,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:41,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:41,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:41,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 66264 backedges. 0 proven. 64449 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2018-09-23 19:36:41,845 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:41,845 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:41,853 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:42,487 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 195 check-sat command(s) [2018-09-23 19:36:42,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:42,494 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 66264 backedges. 0 proven. 64449 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2018-09-23 19:36:42,644 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:42,644 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2018-09-23 19:36:42,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-09-23 19:36:42,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-09-23 19:36:42,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:36:42,645 INFO L87 Difference]: Start difference. First operand 400 states and 433 transitions. Second operand 36 states. [2018-09-23 19:36:42,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:42,960 INFO L93 Difference]: Finished difference Result 425 states and 460 transitions. [2018-09-23 19:36:42,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:36:42,960 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 399 [2018-09-23 19:36:42,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:42,962 INFO L225 Difference]: With dead ends: 425 [2018-09-23 19:36:42,962 INFO L226 Difference]: Without dead ends: 423 [2018-09-23 19:36:42,963 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:36:42,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2018-09-23 19:36:43,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 412. [2018-09-23 19:36:43,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-09-23 19:36:43,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 446 transitions. [2018-09-23 19:36:43,111 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 446 transitions. Word has length 399 [2018-09-23 19:36:43,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:43,112 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 446 transitions. [2018-09-23 19:36:43,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-09-23 19:36:43,112 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 446 transitions. [2018-09-23 19:36:43,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2018-09-23 19:36:43,113 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:43,114 INFO L375 BasicCegarLoop]: trace histogram [340, 34, 34, 1, 1, 1] [2018-09-23 19:36:43,114 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:43,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:43,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1941529129, now seen corresponding path program 37 times [2018-09-23 19:36:43,114 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:43,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:43,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:43,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:43,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 70346 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2018-09-23 19:36:43,915 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:43,915 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:43,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:44,146 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 70346 backedges. 0 proven. 68476 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2018-09-23 19:36:44,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:44,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-09-23 19:36:44,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-09-23 19:36:44,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-09-23 19:36:44,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:36:44,310 INFO L87 Difference]: Start difference. First operand 412 states and 446 transitions. Second operand 37 states. [2018-09-23 19:36:44,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:44,691 INFO L93 Difference]: Finished difference Result 437 states and 473 transitions. [2018-09-23 19:36:44,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-09-23 19:36:44,692 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 411 [2018-09-23 19:36:44,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:44,694 INFO L225 Difference]: With dead ends: 437 [2018-09-23 19:36:44,694 INFO L226 Difference]: Without dead ends: 435 [2018-09-23 19:36:44,695 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:36:44,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2018-09-23 19:36:44,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 424. [2018-09-23 19:36:44,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2018-09-23 19:36:44,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 459 transitions. [2018-09-23 19:36:44,862 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 459 transitions. Word has length 411 [2018-09-23 19:36:44,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:44,863 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 459 transitions. [2018-09-23 19:36:44,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-09-23 19:36:44,863 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 459 transitions. [2018-09-23 19:36:44,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2018-09-23 19:36:44,865 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:44,865 INFO L375 BasicCegarLoop]: trace histogram [350, 35, 35, 1, 1, 1] [2018-09-23 19:36:44,866 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:44,866 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:44,866 INFO L82 PathProgramCache]: Analyzing trace with hash -799221983, now seen corresponding path program 38 times [2018-09-23 19:36:44,866 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:44,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:44,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:44,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:44,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 74550 backedges. 0 proven. 72625 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2018-09-23 19:36:45,987 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:45,987 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:45,995 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:36:46,221 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:36:46,222 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:46,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 74550 backedges. 0 proven. 72625 refuted. 0 times theorem prover too weak. 1925 trivial. 0 not checked. [2018-09-23 19:36:46,425 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:46,426 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2018-09-23 19:36:46,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-09-23 19:36:46,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-09-23 19:36:46,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:36:46,427 INFO L87 Difference]: Start difference. First operand 424 states and 459 transitions. Second operand 38 states. [2018-09-23 19:36:46,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:46,893 INFO L93 Difference]: Finished difference Result 449 states and 486 transitions. [2018-09-23 19:36:46,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-09-23 19:36:46,893 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 423 [2018-09-23 19:36:46,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:46,895 INFO L225 Difference]: With dead ends: 449 [2018-09-23 19:36:46,895 INFO L226 Difference]: Without dead ends: 447 [2018-09-23 19:36:46,896 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:36:46,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-09-23 19:36:47,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 436. [2018-09-23 19:36:47,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2018-09-23 19:36:47,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 472 transitions. [2018-09-23 19:36:47,061 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 472 transitions. Word has length 423 [2018-09-23 19:36:47,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:47,061 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 472 transitions. [2018-09-23 19:36:47,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-09-23 19:36:47,061 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 472 transitions. [2018-09-23 19:36:47,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2018-09-23 19:36:47,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:47,064 INFO L375 BasicCegarLoop]: trace histogram [360, 36, 36, 1, 1, 1] [2018-09-23 19:36:47,064 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:47,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:47,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1044024981, now seen corresponding path program 39 times [2018-09-23 19:36:47,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:47,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:47,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:47,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:47,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 78876 backedges. 0 proven. 76896 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-09-23 19:36:48,207 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:48,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:48,215 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:36:48,957 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 217 check-sat command(s) [2018-09-23 19:36:48,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:48,965 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 78876 backedges. 0 proven. 76896 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2018-09-23 19:36:49,113 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:49,113 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2018-09-23 19:36:49,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-09-23 19:36:49,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-09-23 19:36:49,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:36:49,115 INFO L87 Difference]: Start difference. First operand 436 states and 472 transitions. Second operand 39 states. [2018-09-23 19:36:49,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:49,481 INFO L93 Difference]: Finished difference Result 461 states and 499 transitions. [2018-09-23 19:36:49,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:36:49,481 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 435 [2018-09-23 19:36:49,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:49,483 INFO L225 Difference]: With dead ends: 461 [2018-09-23 19:36:49,483 INFO L226 Difference]: Without dead ends: 459 [2018-09-23 19:36:49,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:36:49,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2018-09-23 19:36:49,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 448. [2018-09-23 19:36:49,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2018-09-23 19:36:49,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 485 transitions. [2018-09-23 19:36:49,660 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 485 transitions. Word has length 435 [2018-09-23 19:36:49,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:49,660 INFO L480 AbstractCegarLoop]: Abstraction has 448 states and 485 transitions. [2018-09-23 19:36:49,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-09-23 19:36:49,660 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 485 transitions. [2018-09-23 19:36:49,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2018-09-23 19:36:49,662 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:49,662 INFO L375 BasicCegarLoop]: trace histogram [370, 37, 37, 1, 1, 1] [2018-09-23 19:36:49,662 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:49,663 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:49,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1695093579, now seen corresponding path program 40 times [2018-09-23 19:36:49,663 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:49,663 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:49,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:49,664 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:49,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:50,546 INFO L134 CoverageAnalysis]: Checked inductivity of 83324 backedges. 0 proven. 81289 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2018-09-23 19:36:50,547 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:50,547 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:50,554 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:36:50,793 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:36:50,793 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:50,800 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:50,955 INFO L134 CoverageAnalysis]: Checked inductivity of 83324 backedges. 0 proven. 81289 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2018-09-23 19:36:50,977 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:50,977 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2018-09-23 19:36:50,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-09-23 19:36:50,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-09-23 19:36:50,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:36:50,978 INFO L87 Difference]: Start difference. First operand 448 states and 485 transitions. Second operand 40 states. [2018-09-23 19:36:51,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:51,476 INFO L93 Difference]: Finished difference Result 473 states and 512 transitions. [2018-09-23 19:36:51,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:36:51,476 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 447 [2018-09-23 19:36:51,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:51,478 INFO L225 Difference]: With dead ends: 473 [2018-09-23 19:36:51,478 INFO L226 Difference]: Without dead ends: 471 [2018-09-23 19:36:51,479 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2018-09-23 19:36:51,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2018-09-23 19:36:51,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 460. [2018-09-23 19:36:51,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2018-09-23 19:36:51,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 498 transitions. [2018-09-23 19:36:51,653 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 498 transitions. Word has length 447 [2018-09-23 19:36:51,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:51,654 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 498 transitions. [2018-09-23 19:36:51,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-09-23 19:36:51,654 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 498 transitions. [2018-09-23 19:36:51,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2018-09-23 19:36:51,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:51,657 INFO L375 BasicCegarLoop]: trace histogram [380, 38, 38, 1, 1, 1] [2018-09-23 19:36:51,657 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:51,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:51,657 INFO L82 PathProgramCache]: Analyzing trace with hash 413649151, now seen corresponding path program 41 times [2018-09-23 19:36:51,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:51,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:51,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:51,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:51,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:51,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 87894 backedges. 0 proven. 85804 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2018-09-23 19:36:52,635 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:52,635 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:52,643 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:36:53,469 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 229 check-sat command(s) [2018-09-23 19:36:53,469 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:53,476 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:53,617 INFO L134 CoverageAnalysis]: Checked inductivity of 87894 backedges. 0 proven. 85804 refuted. 0 times theorem prover too weak. 2090 trivial. 0 not checked. [2018-09-23 19:36:53,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:53,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2018-09-23 19:36:53,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-09-23 19:36:53,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-09-23 19:36:53,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:36:53,640 INFO L87 Difference]: Start difference. First operand 460 states and 498 transitions. Second operand 41 states. [2018-09-23 19:36:54,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:54,211 INFO L93 Difference]: Finished difference Result 485 states and 525 transitions. [2018-09-23 19:36:54,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-09-23 19:36:54,212 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 459 [2018-09-23 19:36:54,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:54,213 INFO L225 Difference]: With dead ends: 485 [2018-09-23 19:36:54,214 INFO L226 Difference]: Without dead ends: 483 [2018-09-23 19:36:54,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:36:54,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2018-09-23 19:36:54,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 472. [2018-09-23 19:36:54,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2018-09-23 19:36:54,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 511 transitions. [2018-09-23 19:36:54,409 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 511 transitions. Word has length 459 [2018-09-23 19:36:54,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:54,409 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 511 transitions. [2018-09-23 19:36:54,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-09-23 19:36:54,410 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 511 transitions. [2018-09-23 19:36:54,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2018-09-23 19:36:54,412 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:54,412 INFO L375 BasicCegarLoop]: trace histogram [390, 39, 39, 1, 1, 1] [2018-09-23 19:36:54,412 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:54,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:54,413 INFO L82 PathProgramCache]: Analyzing trace with hash 432965193, now seen corresponding path program 42 times [2018-09-23 19:36:54,413 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:54,413 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:54,413 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:54,413 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:54,414 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 92586 backedges. 0 proven. 90441 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-09-23 19:36:55,589 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:55,589 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:55,596 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:36:56,425 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 230 check-sat command(s) [2018-09-23 19:36:56,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:36:56,433 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 92586 backedges. 0 proven. 90441 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2018-09-23 19:36:56,603 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:56,603 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2018-09-23 19:36:56,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-09-23 19:36:56,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-09-23 19:36:56,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:36:56,604 INFO L87 Difference]: Start difference. First operand 472 states and 511 transitions. Second operand 42 states. [2018-09-23 19:36:56,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:56,993 INFO L93 Difference]: Finished difference Result 497 states and 538 transitions. [2018-09-23 19:36:56,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:36:56,993 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 471 [2018-09-23 19:36:56,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:56,995 INFO L225 Difference]: With dead ends: 497 [2018-09-23 19:36:56,995 INFO L226 Difference]: Without dead ends: 495 [2018-09-23 19:36:56,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:36:56,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-09-23 19:36:57,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 484. [2018-09-23 19:36:57,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2018-09-23 19:36:57,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 524 transitions. [2018-09-23 19:36:57,223 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 524 transitions. Word has length 471 [2018-09-23 19:36:57,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:57,223 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 524 transitions. [2018-09-23 19:36:57,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-09-23 19:36:57,223 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 524 transitions. [2018-09-23 19:36:57,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2018-09-23 19:36:57,225 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:57,225 INFO L375 BasicCegarLoop]: trace histogram [400, 40, 40, 1, 1, 1] [2018-09-23 19:36:57,225 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:57,225 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:57,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1067558035, now seen corresponding path program 43 times [2018-09-23 19:36:57,226 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:57,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:57,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:57,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:36:57,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:58,816 INFO L134 CoverageAnalysis]: Checked inductivity of 97400 backedges. 0 proven. 95200 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2018-09-23 19:36:58,816 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:36:58,816 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:36:58,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:36:59,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:36:59,315 INFO L134 CoverageAnalysis]: Checked inductivity of 97400 backedges. 0 proven. 95200 refuted. 0 times theorem prover too weak. 2200 trivial. 0 not checked. [2018-09-23 19:36:59,336 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:36:59,336 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-09-23 19:36:59,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-09-23 19:36:59,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-09-23 19:36:59,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:36:59,337 INFO L87 Difference]: Start difference. First operand 484 states and 524 transitions. Second operand 43 states. [2018-09-23 19:36:59,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:36:59,737 INFO L93 Difference]: Finished difference Result 509 states and 551 transitions. [2018-09-23 19:36:59,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:36:59,738 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 483 [2018-09-23 19:36:59,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:36:59,739 INFO L225 Difference]: With dead ends: 509 [2018-09-23 19:36:59,739 INFO L226 Difference]: Without dead ends: 507 [2018-09-23 19:36:59,740 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:36:59,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2018-09-23 19:36:59,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 496. [2018-09-23 19:36:59,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2018-09-23 19:36:59,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 537 transitions. [2018-09-23 19:36:59,956 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 537 transitions. Word has length 483 [2018-09-23 19:36:59,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:36:59,956 INFO L480 AbstractCegarLoop]: Abstraction has 496 states and 537 transitions. [2018-09-23 19:36:59,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-09-23 19:36:59,957 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 537 transitions. [2018-09-23 19:36:59,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2018-09-23 19:36:59,959 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:36:59,959 INFO L375 BasicCegarLoop]: trace histogram [410, 41, 41, 1, 1, 1] [2018-09-23 19:36:59,959 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:36:59,959 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:36:59,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1919441955, now seen corresponding path program 44 times [2018-09-23 19:36:59,959 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:36:59,959 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:36:59,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:59,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:36:59,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:36:59,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 102336 backedges. 0 proven. 100081 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2018-09-23 19:37:00,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:00,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:00,945 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:37:01,215 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:37:01,215 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:01,222 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:01,386 INFO L134 CoverageAnalysis]: Checked inductivity of 102336 backedges. 0 proven. 100081 refuted. 0 times theorem prover too weak. 2255 trivial. 0 not checked. [2018-09-23 19:37:01,408 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:01,408 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2018-09-23 19:37:01,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-09-23 19:37:01,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-09-23 19:37:01,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:37:01,409 INFO L87 Difference]: Start difference. First operand 496 states and 537 transitions. Second operand 44 states. [2018-09-23 19:37:01,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:01,862 INFO L93 Difference]: Finished difference Result 521 states and 564 transitions. [2018-09-23 19:37:01,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-09-23 19:37:01,862 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 495 [2018-09-23 19:37:01,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:01,864 INFO L225 Difference]: With dead ends: 521 [2018-09-23 19:37:01,864 INFO L226 Difference]: Without dead ends: 519 [2018-09-23 19:37:01,864 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2018-09-23 19:37:01,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2018-09-23 19:37:02,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 508. [2018-09-23 19:37:02,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2018-09-23 19:37:02,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 550 transitions. [2018-09-23 19:37:02,094 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 550 transitions. Word has length 495 [2018-09-23 19:37:02,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:02,094 INFO L480 AbstractCegarLoop]: Abstraction has 508 states and 550 transitions. [2018-09-23 19:37:02,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-09-23 19:37:02,094 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 550 transitions. [2018-09-23 19:37:02,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2018-09-23 19:37:02,096 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:02,096 INFO L375 BasicCegarLoop]: trace histogram [420, 42, 42, 1, 1, 1] [2018-09-23 19:37:02,096 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:02,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:02,097 INFO L82 PathProgramCache]: Analyzing trace with hash 157746215, now seen corresponding path program 45 times [2018-09-23 19:37:02,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:02,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:02,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:02,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:02,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 107394 backedges. 0 proven. 105084 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2018-09-23 19:37:03,121 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:03,122 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:03,129 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:37:04,251 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 253 check-sat command(s) [2018-09-23 19:37:04,251 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:04,259 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:04,435 INFO L134 CoverageAnalysis]: Checked inductivity of 107394 backedges. 0 proven. 105084 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2018-09-23 19:37:04,456 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:04,457 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2018-09-23 19:37:04,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-09-23 19:37:04,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-09-23 19:37:04,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:37:04,458 INFO L87 Difference]: Start difference. First operand 508 states and 550 transitions. Second operand 45 states. [2018-09-23 19:37:05,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:05,666 INFO L93 Difference]: Finished difference Result 533 states and 577 transitions. [2018-09-23 19:37:05,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-09-23 19:37:05,670 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 507 [2018-09-23 19:37:05,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:05,672 INFO L225 Difference]: With dead ends: 533 [2018-09-23 19:37:05,672 INFO L226 Difference]: Without dead ends: 531 [2018-09-23 19:37:05,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:37:05,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2018-09-23 19:37:05,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 520. [2018-09-23 19:37:05,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2018-09-23 19:37:05,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 563 transitions. [2018-09-23 19:37:05,940 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 563 transitions. Word has length 507 [2018-09-23 19:37:05,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:05,940 INFO L480 AbstractCegarLoop]: Abstraction has 520 states and 563 transitions. [2018-09-23 19:37:05,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-09-23 19:37:05,941 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 563 transitions. [2018-09-23 19:37:05,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2018-09-23 19:37:05,943 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:05,943 INFO L375 BasicCegarLoop]: trace histogram [430, 43, 43, 1, 1, 1] [2018-09-23 19:37:05,943 INFO L423 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:05,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:05,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1527137649, now seen corresponding path program 46 times [2018-09-23 19:37:05,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:05,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:05,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:05,944 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:05,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 112574 backedges. 0 proven. 110209 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2018-09-23 19:37:06,941 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:06,941 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:06,949 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:37:07,277 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:37:07,277 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:07,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 112574 backedges. 0 proven. 110209 refuted. 0 times theorem prover too weak. 2365 trivial. 0 not checked. [2018-09-23 19:37:07,470 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:07,470 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2018-09-23 19:37:07,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-09-23 19:37:07,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-09-23 19:37:07,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:37:07,471 INFO L87 Difference]: Start difference. First operand 520 states and 563 transitions. Second operand 46 states. [2018-09-23 19:37:08,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:08,045 INFO L93 Difference]: Finished difference Result 545 states and 590 transitions. [2018-09-23 19:37:08,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:37:08,046 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 519 [2018-09-23 19:37:08,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:08,048 INFO L225 Difference]: With dead ends: 545 [2018-09-23 19:37:08,048 INFO L226 Difference]: Without dead ends: 543 [2018-09-23 19:37:08,049 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 519 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2018-09-23 19:37:08,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-09-23 19:37:08,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 532. [2018-09-23 19:37:08,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 532 states. [2018-09-23 19:37:08,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 576 transitions. [2018-09-23 19:37:08,341 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 576 transitions. Word has length 519 [2018-09-23 19:37:08,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:08,342 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 576 transitions. [2018-09-23 19:37:08,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-09-23 19:37:08,342 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 576 transitions. [2018-09-23 19:37:08,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2018-09-23 19:37:08,344 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:08,344 INFO L375 BasicCegarLoop]: trace histogram [440, 44, 44, 1, 1, 1] [2018-09-23 19:37:08,345 INFO L423 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:08,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:08,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1823205307, now seen corresponding path program 47 times [2018-09-23 19:37:08,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:08,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:08,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:08,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:08,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 117876 backedges. 0 proven. 115456 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-09-23 19:37:09,370 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:09,370 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:09,377 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:37:10,423 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 265 check-sat command(s) [2018-09-23 19:37:10,424 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:10,432 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:10,635 INFO L134 CoverageAnalysis]: Checked inductivity of 117876 backedges. 0 proven. 115456 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2018-09-23 19:37:10,656 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:10,657 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2018-09-23 19:37:10,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-09-23 19:37:10,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-09-23 19:37:10,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:37:10,658 INFO L87 Difference]: Start difference. First operand 532 states and 576 transitions. Second operand 47 states. [2018-09-23 19:37:11,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:11,329 INFO L93 Difference]: Finished difference Result 557 states and 603 transitions. [2018-09-23 19:37:11,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:37:11,329 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 531 [2018-09-23 19:37:11,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:11,331 INFO L225 Difference]: With dead ends: 557 [2018-09-23 19:37:11,331 INFO L226 Difference]: Without dead ends: 555 [2018-09-23 19:37:11,332 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 531 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2018-09-23 19:37:11,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2018-09-23 19:37:11,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 544. [2018-09-23 19:37:11,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2018-09-23 19:37:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 589 transitions. [2018-09-23 19:37:11,591 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 589 transitions. Word has length 531 [2018-09-23 19:37:11,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:11,591 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 589 transitions. [2018-09-23 19:37:11,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-09-23 19:37:11,591 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 589 transitions. [2018-09-23 19:37:11,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2018-09-23 19:37:11,593 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:11,593 INFO L375 BasicCegarLoop]: trace histogram [450, 45, 45, 1, 1, 1] [2018-09-23 19:37:11,594 INFO L423 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:11,594 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:11,594 INFO L82 PathProgramCache]: Analyzing trace with hash 181299973, now seen corresponding path program 48 times [2018-09-23 19:37:11,594 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:11,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:11,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:11,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:11,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 123300 backedges. 0 proven. 120825 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-09-23 19:37:12,661 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:12,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:12,669 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:37:13,770 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 267 check-sat command(s) [2018-09-23 19:37:13,770 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:13,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 123300 backedges. 0 proven. 120825 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2018-09-23 19:37:13,997 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:13,997 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2018-09-23 19:37:13,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-09-23 19:37:13,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-09-23 19:37:13,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:37:13,998 INFO L87 Difference]: Start difference. First operand 544 states and 589 transitions. Second operand 48 states. [2018-09-23 19:37:14,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:14,534 INFO L93 Difference]: Finished difference Result 569 states and 616 transitions. [2018-09-23 19:37:14,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-09-23 19:37:14,535 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 543 [2018-09-23 19:37:14,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:14,537 INFO L225 Difference]: With dead ends: 569 [2018-09-23 19:37:14,537 INFO L226 Difference]: Without dead ends: 567 [2018-09-23 19:37:14,537 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 589 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2018-09-23 19:37:14,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2018-09-23 19:37:14,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 556. [2018-09-23 19:37:14,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2018-09-23 19:37:14,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 602 transitions. [2018-09-23 19:37:14,787 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 602 transitions. Word has length 543 [2018-09-23 19:37:14,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:14,788 INFO L480 AbstractCegarLoop]: Abstraction has 556 states and 602 transitions. [2018-09-23 19:37:14,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-09-23 19:37:14,788 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 602 transitions. [2018-09-23 19:37:14,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2018-09-23 19:37:14,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:14,790 INFO L375 BasicCegarLoop]: trace histogram [460, 46, 46, 1, 1, 1] [2018-09-23 19:37:14,790 INFO L423 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:14,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:14,791 INFO L82 PathProgramCache]: Analyzing trace with hash -2077995185, now seen corresponding path program 49 times [2018-09-23 19:37:14,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:14,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:14,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:14,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:14,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2018-09-23 19:37:16,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:16,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:16,107 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:16,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:16,421 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:16,619 INFO L134 CoverageAnalysis]: Checked inductivity of 128846 backedges. 0 proven. 126316 refuted. 0 times theorem prover too weak. 2530 trivial. 0 not checked. [2018-09-23 19:37:16,641 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:16,642 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-09-23 19:37:16,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-09-23 19:37:16,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-09-23 19:37:16,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:37:16,643 INFO L87 Difference]: Start difference. First operand 556 states and 602 transitions. Second operand 49 states. [2018-09-23 19:37:17,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:17,207 INFO L93 Difference]: Finished difference Result 581 states and 629 transitions. [2018-09-23 19:37:17,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-09-23 19:37:17,207 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 555 [2018-09-23 19:37:17,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:17,209 INFO L225 Difference]: With dead ends: 581 [2018-09-23 19:37:17,210 INFO L226 Difference]: Without dead ends: 579 [2018-09-23 19:37:17,210 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 555 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:37:17,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2018-09-23 19:37:17,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 568. [2018-09-23 19:37:17,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2018-09-23 19:37:17,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 615 transitions. [2018-09-23 19:37:17,482 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 615 transitions. Word has length 555 [2018-09-23 19:37:17,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:17,482 INFO L480 AbstractCegarLoop]: Abstraction has 568 states and 615 transitions. [2018-09-23 19:37:17,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-09-23 19:37:17,483 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 615 transitions. [2018-09-23 19:37:17,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2018-09-23 19:37:17,485 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:17,486 INFO L375 BasicCegarLoop]: trace histogram [470, 47, 47, 1, 1, 1] [2018-09-23 19:37:17,486 INFO L423 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:17,486 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:17,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1235489945, now seen corresponding path program 50 times [2018-09-23 19:37:17,486 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:17,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:17,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:17,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:17,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 134514 backedges. 0 proven. 131929 refuted. 0 times theorem prover too weak. 2585 trivial. 0 not checked. [2018-09-23 19:37:19,037 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:19,037 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:19,044 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:37:19,336 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:37:19,337 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:19,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 134514 backedges. 0 proven. 131929 refuted. 0 times theorem prover too weak. 2585 trivial. 0 not checked. [2018-09-23 19:37:19,559 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:19,560 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2018-09-23 19:37:19,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-09-23 19:37:19,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-09-23 19:37:19,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:37:19,561 INFO L87 Difference]: Start difference. First operand 568 states and 615 transitions. Second operand 50 states. [2018-09-23 19:37:20,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:20,103 INFO L93 Difference]: Finished difference Result 593 states and 642 transitions. [2018-09-23 19:37:20,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:37:20,104 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 567 [2018-09-23 19:37:20,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:20,106 INFO L225 Difference]: With dead ends: 593 [2018-09-23 19:37:20,106 INFO L226 Difference]: Without dead ends: 591 [2018-09-23 19:37:20,106 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:37:20,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2018-09-23 19:37:20,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 580. [2018-09-23 19:37:20,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2018-09-23 19:37:20,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 628 transitions. [2018-09-23 19:37:20,405 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 628 transitions. Word has length 567 [2018-09-23 19:37:20,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:20,405 INFO L480 AbstractCegarLoop]: Abstraction has 580 states and 628 transitions. [2018-09-23 19:37:20,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-09-23 19:37:20,406 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 628 transitions. [2018-09-23 19:37:20,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2018-09-23 19:37:20,408 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:20,408 INFO L375 BasicCegarLoop]: trace histogram [480, 48, 48, 1, 1, 1] [2018-09-23 19:37:20,408 INFO L423 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:20,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:20,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1903936797, now seen corresponding path program 51 times [2018-09-23 19:37:20,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:20,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:20,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:20,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:20,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:20,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 140304 backedges. 0 proven. 137664 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2018-09-23 19:37:21,705 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:21,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:21,715 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:37:23,006 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 289 check-sat command(s) [2018-09-23 19:37:23,007 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:23,016 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 140304 backedges. 0 proven. 137664 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2018-09-23 19:37:23,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:23,330 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2018-09-23 19:37:23,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-09-23 19:37:23,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-09-23 19:37:23,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:37:23,331 INFO L87 Difference]: Start difference. First operand 580 states and 628 transitions. Second operand 51 states. [2018-09-23 19:37:23,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:23,889 INFO L93 Difference]: Finished difference Result 605 states and 655 transitions. [2018-09-23 19:37:23,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:37:23,889 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 579 [2018-09-23 19:37:23,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:23,891 INFO L225 Difference]: With dead ends: 605 [2018-09-23 19:37:23,891 INFO L226 Difference]: Without dead ends: 603 [2018-09-23 19:37:23,892 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 579 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2018-09-23 19:37:23,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2018-09-23 19:37:24,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 592. [2018-09-23 19:37:24,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2018-09-23 19:37:24,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 641 transitions. [2018-09-23 19:37:24,211 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 641 transitions. Word has length 579 [2018-09-23 19:37:24,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:24,211 INFO L480 AbstractCegarLoop]: Abstraction has 592 states and 641 transitions. [2018-09-23 19:37:24,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-09-23 19:37:24,211 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 641 transitions. [2018-09-23 19:37:24,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2018-09-23 19:37:24,214 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:24,214 INFO L375 BasicCegarLoop]: trace histogram [490, 49, 49, 1, 1, 1] [2018-09-23 19:37:24,214 INFO L423 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:24,215 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:24,215 INFO L82 PathProgramCache]: Analyzing trace with hash -398769619, now seen corresponding path program 52 times [2018-09-23 19:37:24,215 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:24,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:24,215 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:24,215 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:24,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 146216 backedges. 0 proven. 143521 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2018-09-23 19:37:25,447 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:25,447 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:25,457 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:37:25,779 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:37:25,779 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:25,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:26,021 INFO L134 CoverageAnalysis]: Checked inductivity of 146216 backedges. 0 proven. 143521 refuted. 0 times theorem prover too weak. 2695 trivial. 0 not checked. [2018-09-23 19:37:26,042 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:26,042 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2018-09-23 19:37:26,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-09-23 19:37:26,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-09-23 19:37:26,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:37:26,044 INFO L87 Difference]: Start difference. First operand 592 states and 641 transitions. Second operand 52 states. [2018-09-23 19:37:26,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:26,623 INFO L93 Difference]: Finished difference Result 617 states and 668 transitions. [2018-09-23 19:37:26,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 19:37:26,624 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 591 [2018-09-23 19:37:26,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:26,626 INFO L225 Difference]: With dead ends: 617 [2018-09-23 19:37:26,626 INFO L226 Difference]: Without dead ends: 615 [2018-09-23 19:37:26,627 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 591 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2018-09-23 19:37:26,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2018-09-23 19:37:26,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 604. [2018-09-23 19:37:26,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2018-09-23 19:37:26,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 654 transitions. [2018-09-23 19:37:26,979 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 654 transitions. Word has length 591 [2018-09-23 19:37:26,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:26,980 INFO L480 AbstractCegarLoop]: Abstraction has 604 states and 654 transitions. [2018-09-23 19:37:26,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-09-23 19:37:26,980 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 654 transitions. [2018-09-23 19:37:26,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2018-09-23 19:37:26,982 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:26,983 INFO L375 BasicCegarLoop]: trace histogram [500, 50, 50, 1, 1, 1] [2018-09-23 19:37:26,983 INFO L423 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:26,983 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:26,983 INFO L82 PathProgramCache]: Analyzing trace with hash -293623177, now seen corresponding path program 53 times [2018-09-23 19:37:26,983 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:26,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:26,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:26,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:26,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 152250 backedges. 0 proven. 149500 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2018-09-23 19:37:28,291 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:28,291 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:28,299 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:37:29,650 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 301 check-sat command(s) [2018-09-23 19:37:29,650 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:29,660 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 152250 backedges. 0 proven. 149500 refuted. 0 times theorem prover too weak. 2750 trivial. 0 not checked. [2018-09-23 19:37:29,930 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:29,930 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2018-09-23 19:37:29,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-09-23 19:37:29,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-09-23 19:37:29,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:37:29,931 INFO L87 Difference]: Start difference. First operand 604 states and 654 transitions. Second operand 53 states. [2018-09-23 19:37:30,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:30,587 INFO L93 Difference]: Finished difference Result 629 states and 681 transitions. [2018-09-23 19:37:30,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-09-23 19:37:30,587 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 603 [2018-09-23 19:37:30,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:30,589 INFO L225 Difference]: With dead ends: 629 [2018-09-23 19:37:30,589 INFO L226 Difference]: Without dead ends: 627 [2018-09-23 19:37:30,590 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 19:37:30,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2018-09-23 19:37:30,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 616. [2018-09-23 19:37:30,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2018-09-23 19:37:30,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 667 transitions. [2018-09-23 19:37:30,945 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 667 transitions. Word has length 603 [2018-09-23 19:37:30,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:30,945 INFO L480 AbstractCegarLoop]: Abstraction has 616 states and 667 transitions. [2018-09-23 19:37:30,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-09-23 19:37:30,946 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 667 transitions. [2018-09-23 19:37:30,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2018-09-23 19:37:30,949 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:30,950 INFO L375 BasicCegarLoop]: trace histogram [510, 51, 51, 1, 1, 1] [2018-09-23 19:37:30,950 INFO L423 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:30,950 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:30,950 INFO L82 PathProgramCache]: Analyzing trace with hash -616041535, now seen corresponding path program 54 times [2018-09-23 19:37:30,950 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:30,950 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:30,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:30,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:30,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 158406 backedges. 0 proven. 155601 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2018-09-23 19:37:32,322 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:32,322 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:32,330 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:37:33,714 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 302 check-sat command(s) [2018-09-23 19:37:33,714 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:33,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 158406 backedges. 0 proven. 155601 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2018-09-23 19:37:34,094 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:34,094 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2018-09-23 19:37:34,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-09-23 19:37:34,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-09-23 19:37:34,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:37:34,095 INFO L87 Difference]: Start difference. First operand 616 states and 667 transitions. Second operand 54 states. [2018-09-23 19:37:34,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:34,732 INFO L93 Difference]: Finished difference Result 641 states and 694 transitions. [2018-09-23 19:37:34,732 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:37:34,733 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 615 [2018-09-23 19:37:34,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:34,735 INFO L225 Difference]: With dead ends: 641 [2018-09-23 19:37:34,735 INFO L226 Difference]: Without dead ends: 639 [2018-09-23 19:37:34,735 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 667 GetRequests, 615 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:37:34,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2018-09-23 19:37:35,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 628. [2018-09-23 19:37:35,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2018-09-23 19:37:35,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 680 transitions. [2018-09-23 19:37:35,105 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 680 transitions. Word has length 615 [2018-09-23 19:37:35,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:35,105 INFO L480 AbstractCegarLoop]: Abstraction has 628 states and 680 transitions. [2018-09-23 19:37:35,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-09-23 19:37:35,105 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 680 transitions. [2018-09-23 19:37:35,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2018-09-23 19:37:35,108 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:35,109 INFO L375 BasicCegarLoop]: trace histogram [520, 52, 52, 1, 1, 1] [2018-09-23 19:37:35,109 INFO L423 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:35,109 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:35,109 INFO L82 PathProgramCache]: Analyzing trace with hash 717921803, now seen corresponding path program 55 times [2018-09-23 19:37:35,109 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:35,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:35,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:35,110 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:35,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 164684 backedges. 0 proven. 161824 refuted. 0 times theorem prover too weak. 2860 trivial. 0 not checked. [2018-09-23 19:37:36,527 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:36,527 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:36,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:36,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:36,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 164684 backedges. 0 proven. 161824 refuted. 0 times theorem prover too weak. 2860 trivial. 0 not checked. [2018-09-23 19:37:37,138 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:37,138 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-09-23 19:37:37,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-09-23 19:37:37,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-09-23 19:37:37,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:37:37,139 INFO L87 Difference]: Start difference. First operand 628 states and 680 transitions. Second operand 55 states. [2018-09-23 19:37:37,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:37,823 INFO L93 Difference]: Finished difference Result 653 states and 707 transitions. [2018-09-23 19:37:37,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:37:37,824 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 627 [2018-09-23 19:37:37,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:37,826 INFO L225 Difference]: With dead ends: 653 [2018-09-23 19:37:37,826 INFO L226 Difference]: Without dead ends: 651 [2018-09-23 19:37:37,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 627 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:37:37,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2018-09-23 19:37:38,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 640. [2018-09-23 19:37:38,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 640 states. [2018-09-23 19:37:38,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 693 transitions. [2018-09-23 19:37:38,175 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 693 transitions. Word has length 627 [2018-09-23 19:37:38,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:38,176 INFO L480 AbstractCegarLoop]: Abstraction has 640 states and 693 transitions. [2018-09-23 19:37:38,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-09-23 19:37:38,176 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 693 transitions. [2018-09-23 19:37:38,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2018-09-23 19:37:38,179 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:38,179 INFO L375 BasicCegarLoop]: trace histogram [530, 53, 53, 1, 1, 1] [2018-09-23 19:37:38,179 INFO L423 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:38,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:38,179 INFO L82 PathProgramCache]: Analyzing trace with hash 998123861, now seen corresponding path program 56 times [2018-09-23 19:37:38,180 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:38,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:38,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:38,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:37:38,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-09-23 19:37:39,983 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:39,983 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:39,991 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:37:40,326 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:37:40,326 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:40,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 171084 backedges. 0 proven. 168169 refuted. 0 times theorem prover too weak. 2915 trivial. 0 not checked. [2018-09-23 19:37:40,614 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:40,614 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2018-09-23 19:37:40,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-09-23 19:37:40,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-09-23 19:37:40,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:37:40,615 INFO L87 Difference]: Start difference. First operand 640 states and 693 transitions. Second operand 56 states. [2018-09-23 19:37:41,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:41,369 INFO L93 Difference]: Finished difference Result 665 states and 720 transitions. [2018-09-23 19:37:41,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:37:41,369 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 639 [2018-09-23 19:37:41,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:41,372 INFO L225 Difference]: With dead ends: 665 [2018-09-23 19:37:41,372 INFO L226 Difference]: Without dead ends: 663 [2018-09-23 19:37:41,372 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2018-09-23 19:37:41,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2018-09-23 19:37:41,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 652. [2018-09-23 19:37:41,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2018-09-23 19:37:41,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 706 transitions. [2018-09-23 19:37:41,775 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 706 transitions. Word has length 639 [2018-09-23 19:37:41,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:41,775 INFO L480 AbstractCegarLoop]: Abstraction has 652 states and 706 transitions. [2018-09-23 19:37:41,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-09-23 19:37:41,775 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 706 transitions. [2018-09-23 19:37:41,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2018-09-23 19:37:41,778 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:41,778 INFO L375 BasicCegarLoop]: trace histogram [540, 54, 54, 1, 1, 1] [2018-09-23 19:37:41,779 INFO L423 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:41,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:41,779 INFO L82 PathProgramCache]: Analyzing trace with hash -300345953, now seen corresponding path program 57 times [2018-09-23 19:37:41,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:41,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:41,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:41,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:41,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 177606 backedges. 0 proven. 174636 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-09-23 19:37:43,257 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:43,257 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:43,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:37:44,868 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 325 check-sat command(s) [2018-09-23 19:37:44,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:44,878 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:45,188 INFO L134 CoverageAnalysis]: Checked inductivity of 177606 backedges. 0 proven. 174636 refuted. 0 times theorem prover too weak. 2970 trivial. 0 not checked. [2018-09-23 19:37:45,210 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:45,210 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2018-09-23 19:37:45,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-09-23 19:37:45,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-09-23 19:37:45,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:37:45,212 INFO L87 Difference]: Start difference. First operand 652 states and 706 transitions. Second operand 57 states. [2018-09-23 19:37:45,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:45,962 INFO L93 Difference]: Finished difference Result 677 states and 733 transitions. [2018-09-23 19:37:45,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-09-23 19:37:45,963 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 651 [2018-09-23 19:37:45,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:45,965 INFO L225 Difference]: With dead ends: 677 [2018-09-23 19:37:45,965 INFO L226 Difference]: Without dead ends: 675 [2018-09-23 19:37:45,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 651 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2018-09-23 19:37:45,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2018-09-23 19:37:46,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 664. [2018-09-23 19:37:46,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2018-09-23 19:37:46,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 719 transitions. [2018-09-23 19:37:46,385 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 719 transitions. Word has length 651 [2018-09-23 19:37:46,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:46,385 INFO L480 AbstractCegarLoop]: Abstraction has 664 states and 719 transitions. [2018-09-23 19:37:46,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-09-23 19:37:46,385 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 719 transitions. [2018-09-23 19:37:46,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2018-09-23 19:37:46,388 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:46,388 INFO L375 BasicCegarLoop]: trace histogram [550, 55, 55, 1, 1, 1] [2018-09-23 19:37:46,389 INFO L423 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:46,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:46,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1167188713, now seen corresponding path program 58 times [2018-09-23 19:37:46,389 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:46,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:46,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:46,390 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:46,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 184250 backedges. 0 proven. 181225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2018-09-23 19:37:47,912 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:47,912 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:47,922 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:37:48,274 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:37:48,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:48,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 184250 backedges. 0 proven. 181225 refuted. 0 times theorem prover too weak. 3025 trivial. 0 not checked. [2018-09-23 19:37:48,638 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:48,638 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2018-09-23 19:37:48,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-09-23 19:37:48,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-09-23 19:37:48,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:37:48,639 INFO L87 Difference]: Start difference. First operand 664 states and 719 transitions. Second operand 58 states. [2018-09-23 19:37:49,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:49,390 INFO L93 Difference]: Finished difference Result 689 states and 746 transitions. [2018-09-23 19:37:49,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-09-23 19:37:49,390 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 663 [2018-09-23 19:37:49,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:49,393 INFO L225 Difference]: With dead ends: 689 [2018-09-23 19:37:49,393 INFO L226 Difference]: Without dead ends: 687 [2018-09-23 19:37:49,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 663 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:37:49,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2018-09-23 19:37:49,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 676. [2018-09-23 19:37:49,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 676 states. [2018-09-23 19:37:49,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 732 transitions. [2018-09-23 19:37:49,787 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 732 transitions. Word has length 663 [2018-09-23 19:37:49,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:49,787 INFO L480 AbstractCegarLoop]: Abstraction has 676 states and 732 transitions. [2018-09-23 19:37:49,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-09-23 19:37:49,787 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 732 transitions. [2018-09-23 19:37:49,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2018-09-23 19:37:49,790 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:49,790 INFO L375 BasicCegarLoop]: trace histogram [560, 56, 56, 1, 1, 1] [2018-09-23 19:37:49,791 INFO L423 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:49,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:49,791 INFO L82 PathProgramCache]: Analyzing trace with hash 119476531, now seen corresponding path program 59 times [2018-09-23 19:37:49,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:49,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:49,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:49,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:49,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 191016 backedges. 0 proven. 187936 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-09-23 19:37:51,417 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:51,417 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:51,424 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:37:53,113 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 337 check-sat command(s) [2018-09-23 19:37:53,113 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:53,123 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 191016 backedges. 0 proven. 187936 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2018-09-23 19:37:53,465 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:53,465 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2018-09-23 19:37:53,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-09-23 19:37:53,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-09-23 19:37:53,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:37:53,466 INFO L87 Difference]: Start difference. First operand 676 states and 732 transitions. Second operand 59 states. [2018-09-23 19:37:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:54,216 INFO L93 Difference]: Finished difference Result 701 states and 759 transitions. [2018-09-23 19:37:54,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-09-23 19:37:54,216 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 675 [2018-09-23 19:37:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:54,218 INFO L225 Difference]: With dead ends: 701 [2018-09-23 19:37:54,219 INFO L226 Difference]: Without dead ends: 699 [2018-09-23 19:37:54,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 675 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2018-09-23 19:37:54,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2018-09-23 19:37:54,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 688. [2018-09-23 19:37:54,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688 states. [2018-09-23 19:37:54,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 745 transitions. [2018-09-23 19:37:54,672 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 745 transitions. Word has length 675 [2018-09-23 19:37:54,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:54,673 INFO L480 AbstractCegarLoop]: Abstraction has 688 states and 745 transitions. [2018-09-23 19:37:54,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-09-23 19:37:54,673 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 745 transitions. [2018-09-23 19:37:54,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 688 [2018-09-23 19:37:54,676 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:54,677 INFO L375 BasicCegarLoop]: trace histogram [570, 57, 57, 1, 1, 1] [2018-09-23 19:37:54,677 INFO L423 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:54,677 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:54,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1513562237, now seen corresponding path program 60 times [2018-09-23 19:37:54,677 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:54,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:54,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:54,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:54,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:37:56,277 INFO L134 CoverageAnalysis]: Checked inductivity of 197904 backedges. 0 proven. 194769 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2018-09-23 19:37:56,277 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:37:56,277 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:37:56,287 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:37:58,038 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 339 check-sat command(s) [2018-09-23 19:37:58,038 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:37:58,050 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:37:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 197904 backedges. 0 proven. 194769 refuted. 0 times theorem prover too weak. 3135 trivial. 0 not checked. [2018-09-23 19:37:58,420 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:37:58,421 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2018-09-23 19:37:58,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-09-23 19:37:58,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-09-23 19:37:58,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:37:58,422 INFO L87 Difference]: Start difference. First operand 688 states and 745 transitions. Second operand 60 states. [2018-09-23 19:37:59,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:37:59,238 INFO L93 Difference]: Finished difference Result 713 states and 772 transitions. [2018-09-23 19:37:59,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-09-23 19:37:59,239 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 687 [2018-09-23 19:37:59,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:37:59,242 INFO L225 Difference]: With dead ends: 713 [2018-09-23 19:37:59,242 INFO L226 Difference]: Without dead ends: 711 [2018-09-23 19:37:59,242 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 687 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:37:59,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2018-09-23 19:37:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 700. [2018-09-23 19:37:59,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2018-09-23 19:37:59,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 758 transitions. [2018-09-23 19:37:59,719 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 758 transitions. Word has length 687 [2018-09-23 19:37:59,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:37:59,720 INFO L480 AbstractCegarLoop]: Abstraction has 700 states and 758 transitions. [2018-09-23 19:37:59,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-09-23 19:37:59,720 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 758 transitions. [2018-09-23 19:37:59,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2018-09-23 19:37:59,723 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:37:59,723 INFO L375 BasicCegarLoop]: trace histogram [580, 58, 58, 1, 1, 1] [2018-09-23 19:37:59,724 INFO L423 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:37:59,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:37:59,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1754304711, now seen corresponding path program 61 times [2018-09-23 19:37:59,724 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:37:59,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:37:59,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:59,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:37:59,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:37:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:01,435 INFO L134 CoverageAnalysis]: Checked inductivity of 204914 backedges. 0 proven. 201724 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2018-09-23 19:38:01,435 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:01,435 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:01,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:38:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:01,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:02,169 INFO L134 CoverageAnalysis]: Checked inductivity of 204914 backedges. 0 proven. 201724 refuted. 0 times theorem prover too weak. 3190 trivial. 0 not checked. [2018-09-23 19:38:02,190 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:02,190 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-09-23 19:38:02,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-09-23 19:38:02,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-09-23 19:38:02,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:38:02,192 INFO L87 Difference]: Start difference. First operand 700 states and 758 transitions. Second operand 61 states. [2018-09-23 19:38:03,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:03,063 INFO L93 Difference]: Finished difference Result 725 states and 785 transitions. [2018-09-23 19:38:03,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-09-23 19:38:03,063 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 699 [2018-09-23 19:38:03,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:03,066 INFO L225 Difference]: With dead ends: 725 [2018-09-23 19:38:03,066 INFO L226 Difference]: Without dead ends: 723 [2018-09-23 19:38:03,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 699 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:38:03,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2018-09-23 19:38:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 712. [2018-09-23 19:38:03,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2018-09-23 19:38:03,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 771 transitions. [2018-09-23 19:38:03,532 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 771 transitions. Word has length 699 [2018-09-23 19:38:03,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:03,533 INFO L480 AbstractCegarLoop]: Abstraction has 712 states and 771 transitions. [2018-09-23 19:38:03,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-09-23 19:38:03,533 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 771 transitions. [2018-09-23 19:38:03,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 712 [2018-09-23 19:38:03,536 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:03,536 INFO L375 BasicCegarLoop]: trace histogram [590, 59, 59, 1, 1, 1] [2018-09-23 19:38:03,536 INFO L423 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:03,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:03,537 INFO L82 PathProgramCache]: Analyzing trace with hash -31333871, now seen corresponding path program 62 times [2018-09-23 19:38:03,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:03,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:03,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:03,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:38:03,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:03,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 212046 backedges. 0 proven. 208801 refuted. 0 times theorem prover too weak. 3245 trivial. 0 not checked. [2018-09-23 19:38:05,557 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:05,557 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:05,565 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:38:05,935 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:38:05,935 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:05,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 212046 backedges. 0 proven. 208801 refuted. 0 times theorem prover too weak. 3245 trivial. 0 not checked. [2018-09-23 19:38:06,273 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:06,273 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2018-09-23 19:38:06,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-09-23 19:38:06,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-09-23 19:38:06,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:38:06,274 INFO L87 Difference]: Start difference. First operand 712 states and 771 transitions. Second operand 62 states. [2018-09-23 19:38:07,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:07,198 INFO L93 Difference]: Finished difference Result 737 states and 798 transitions. [2018-09-23 19:38:07,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-09-23 19:38:07,198 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 711 [2018-09-23 19:38:07,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:07,200 INFO L225 Difference]: With dead ends: 737 [2018-09-23 19:38:07,200 INFO L226 Difference]: Without dead ends: 735 [2018-09-23 19:38:07,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 771 GetRequests, 711 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:38:07,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-09-23 19:38:07,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 724. [2018-09-23 19:38:07,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2018-09-23 19:38:07,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 784 transitions. [2018-09-23 19:38:07,652 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 784 transitions. Word has length 711 [2018-09-23 19:38:07,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:07,652 INFO L480 AbstractCegarLoop]: Abstraction has 724 states and 784 transitions. [2018-09-23 19:38:07,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-09-23 19:38:07,652 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 784 transitions. [2018-09-23 19:38:07,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2018-09-23 19:38:07,656 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:07,656 INFO L375 BasicCegarLoop]: trace histogram [600, 60, 60, 1, 1, 1] [2018-09-23 19:38:07,656 INFO L423 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:07,657 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:07,657 INFO L82 PathProgramCache]: Analyzing trace with hash 690066523, now seen corresponding path program 63 times [2018-09-23 19:38:07,657 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:07,657 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:07,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:07,658 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:07,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:07,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 219300 backedges. 0 proven. 216000 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2018-09-23 19:38:09,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:09,423 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:09,432 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:38:11,403 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 361 check-sat command(s) [2018-09-23 19:38:11,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:11,414 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 219300 backedges. 0 proven. 216000 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2018-09-23 19:38:11,728 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:11,729 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2018-09-23 19:38:11,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-09-23 19:38:11,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-09-23 19:38:11,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:38:11,730 INFO L87 Difference]: Start difference. First operand 724 states and 784 transitions. Second operand 63 states. [2018-09-23 19:38:12,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:12,961 INFO L93 Difference]: Finished difference Result 749 states and 811 transitions. [2018-09-23 19:38:12,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 19:38:12,961 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 723 [2018-09-23 19:38:12,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:12,965 INFO L225 Difference]: With dead ends: 749 [2018-09-23 19:38:12,965 INFO L226 Difference]: Without dead ends: 747 [2018-09-23 19:38:12,966 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 723 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2018-09-23 19:38:12,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2018-09-23 19:38:13,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 736. [2018-09-23 19:38:13,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2018-09-23 19:38:13,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 797 transitions. [2018-09-23 19:38:13,615 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 797 transitions. Word has length 723 [2018-09-23 19:38:13,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:13,616 INFO L480 AbstractCegarLoop]: Abstraction has 736 states and 797 transitions. [2018-09-23 19:38:13,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-09-23 19:38:13,616 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 797 transitions. [2018-09-23 19:38:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2018-09-23 19:38:13,620 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:13,620 INFO L375 BasicCegarLoop]: trace histogram [610, 61, 61, 1, 1, 1] [2018-09-23 19:38:13,620 INFO L423 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:13,620 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:13,621 INFO L82 PathProgramCache]: Analyzing trace with hash -637130843, now seen corresponding path program 64 times [2018-09-23 19:38:13,621 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:13,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:13,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:13,621 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:13,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:13,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 226676 backedges. 0 proven. 223321 refuted. 0 times theorem prover too weak. 3355 trivial. 0 not checked. [2018-09-23 19:38:15,709 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:15,709 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:15,717 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:38:16,118 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:38:16,118 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:16,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 226676 backedges. 0 proven. 223321 refuted. 0 times theorem prover too weak. 3355 trivial. 0 not checked. [2018-09-23 19:38:16,463 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:16,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2018-09-23 19:38:16,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-09-23 19:38:16,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-09-23 19:38:16,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:38:16,465 INFO L87 Difference]: Start difference. First operand 736 states and 797 transitions. Second operand 64 states. [2018-09-23 19:38:17,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:17,440 INFO L93 Difference]: Finished difference Result 761 states and 824 transitions. [2018-09-23 19:38:17,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-09-23 19:38:17,441 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 735 [2018-09-23 19:38:17,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:17,443 INFO L225 Difference]: With dead ends: 761 [2018-09-23 19:38:17,443 INFO L226 Difference]: Without dead ends: 759 [2018-09-23 19:38:17,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 797 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2018-09-23 19:38:17,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2018-09-23 19:38:17,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 748. [2018-09-23 19:38:17,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 748 states. [2018-09-23 19:38:17,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 810 transitions. [2018-09-23 19:38:17,997 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 810 transitions. Word has length 735 [2018-09-23 19:38:17,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:17,998 INFO L480 AbstractCegarLoop]: Abstraction has 748 states and 810 transitions. [2018-09-23 19:38:17,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-09-23 19:38:17,998 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 810 transitions. [2018-09-23 19:38:18,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2018-09-23 19:38:18,002 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:18,002 INFO L375 BasicCegarLoop]: trace histogram [620, 62, 62, 1, 1, 1] [2018-09-23 19:38:18,002 INFO L423 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:18,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:18,002 INFO L82 PathProgramCache]: Analyzing trace with hash -2088363025, now seen corresponding path program 65 times [2018-09-23 19:38:18,003 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:18,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:18,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:18,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:18,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:20,384 INFO L134 CoverageAnalysis]: Checked inductivity of 234174 backedges. 0 proven. 230764 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2018-09-23 19:38:20,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:20,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:20,394 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:38:22,476 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 373 check-sat command(s) [2018-09-23 19:38:22,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:22,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 234174 backedges. 0 proven. 230764 refuted. 0 times theorem prover too weak. 3410 trivial. 0 not checked. [2018-09-23 19:38:22,883 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:22,883 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2018-09-23 19:38:22,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-09-23 19:38:22,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-09-23 19:38:22,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:38:22,885 INFO L87 Difference]: Start difference. First operand 748 states and 810 transitions. Second operand 65 states. [2018-09-23 19:38:23,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:23,875 INFO L93 Difference]: Finished difference Result 773 states and 837 transitions. [2018-09-23 19:38:23,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:38:23,876 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 747 [2018-09-23 19:38:23,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:23,878 INFO L225 Difference]: With dead ends: 773 [2018-09-23 19:38:23,878 INFO L226 Difference]: Without dead ends: 771 [2018-09-23 19:38:23,879 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 747 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2018-09-23 19:38:23,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2018-09-23 19:38:24,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 760. [2018-09-23 19:38:24,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2018-09-23 19:38:24,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 823 transitions. [2018-09-23 19:38:24,448 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 823 transitions. Word has length 747 [2018-09-23 19:38:24,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:24,449 INFO L480 AbstractCegarLoop]: Abstraction has 760 states and 823 transitions. [2018-09-23 19:38:24,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-09-23 19:38:24,449 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 823 transitions. [2018-09-23 19:38:24,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2018-09-23 19:38:24,453 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:24,453 INFO L375 BasicCegarLoop]: trace histogram [630, 63, 63, 1, 1, 1] [2018-09-23 19:38:24,453 INFO L423 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:24,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:24,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1164447431, now seen corresponding path program 66 times [2018-09-23 19:38:24,454 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:24,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:24,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:24,454 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:24,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 241794 backedges. 0 proven. 238329 refuted. 0 times theorem prover too weak. 3465 trivial. 0 not checked. [2018-09-23 19:38:26,659 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:26,659 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:26,666 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:38:28,790 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 374 check-sat command(s) [2018-09-23 19:38:28,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:28,802 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 241794 backedges. 0 proven. 238329 refuted. 0 times theorem prover too weak. 3465 trivial. 0 not checked. [2018-09-23 19:38:29,194 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:29,194 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2018-09-23 19:38:29,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-09-23 19:38:29,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-09-23 19:38:29,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:38:29,196 INFO L87 Difference]: Start difference. First operand 760 states and 823 transitions. Second operand 66 states. [2018-09-23 19:38:30,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:30,203 INFO L93 Difference]: Finished difference Result 785 states and 850 transitions. [2018-09-23 19:38:30,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-09-23 19:38:30,203 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 759 [2018-09-23 19:38:30,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:30,206 INFO L225 Difference]: With dead ends: 785 [2018-09-23 19:38:30,206 INFO L226 Difference]: Without dead ends: 783 [2018-09-23 19:38:30,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 823 GetRequests, 759 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2018-09-23 19:38:30,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2018-09-23 19:38:30,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 772. [2018-09-23 19:38:30,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 772 states. [2018-09-23 19:38:30,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 836 transitions. [2018-09-23 19:38:30,792 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 836 transitions. Word has length 759 [2018-09-23 19:38:30,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:30,793 INFO L480 AbstractCegarLoop]: Abstraction has 772 states and 836 transitions. [2018-09-23 19:38:30,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-09-23 19:38:30,793 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 836 transitions. [2018-09-23 19:38:30,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2018-09-23 19:38:30,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:30,797 INFO L375 BasicCegarLoop]: trace histogram [640, 64, 64, 1, 1, 1] [2018-09-23 19:38:30,797 INFO L423 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:30,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:30,798 INFO L82 PathProgramCache]: Analyzing trace with hash -697161853, now seen corresponding path program 67 times [2018-09-23 19:38:30,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:30,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:30,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:30,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:30,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 249536 backedges. 0 proven. 246016 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2018-09-23 19:38:32,847 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:32,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:32,854 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:38:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:33,281 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:33,661 INFO L134 CoverageAnalysis]: Checked inductivity of 249536 backedges. 0 proven. 246016 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2018-09-23 19:38:33,682 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:33,682 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-09-23 19:38:33,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-09-23 19:38:33,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-09-23 19:38:33,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:38:33,684 INFO L87 Difference]: Start difference. First operand 772 states and 836 transitions. Second operand 67 states. [2018-09-23 19:38:34,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:34,665 INFO L93 Difference]: Finished difference Result 797 states and 863 transitions. [2018-09-23 19:38:34,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-09-23 19:38:34,665 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 771 [2018-09-23 19:38:34,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:34,668 INFO L225 Difference]: With dead ends: 797 [2018-09-23 19:38:34,668 INFO L226 Difference]: Without dead ends: 795 [2018-09-23 19:38:34,669 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 836 GetRequests, 771 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2018-09-23 19:38:34,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2018-09-23 19:38:35,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 784. [2018-09-23 19:38:35,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 784 states. [2018-09-23 19:38:35,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 849 transitions. [2018-09-23 19:38:35,280 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 849 transitions. Word has length 771 [2018-09-23 19:38:35,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:35,280 INFO L480 AbstractCegarLoop]: Abstraction has 784 states and 849 transitions. [2018-09-23 19:38:35,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-09-23 19:38:35,280 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 849 transitions. [2018-09-23 19:38:35,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 784 [2018-09-23 19:38:35,284 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:35,285 INFO L375 BasicCegarLoop]: trace histogram [650, 65, 65, 1, 1, 1] [2018-09-23 19:38:35,285 INFO L423 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:35,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:35,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1869922611, now seen corresponding path program 68 times [2018-09-23 19:38:35,285 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:35,285 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:35,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:35,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:38:35,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 257400 backedges. 0 proven. 253825 refuted. 0 times theorem prover too weak. 3575 trivial. 0 not checked. [2018-09-23 19:38:37,397 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:37,397 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:37,405 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:38:37,833 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:38:37,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:37,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 257400 backedges. 0 proven. 253825 refuted. 0 times theorem prover too weak. 3575 trivial. 0 not checked. [2018-09-23 19:38:38,212 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:38,213 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2018-09-23 19:38:38,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-09-23 19:38:38,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-09-23 19:38:38,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:38:38,214 INFO L87 Difference]: Start difference. First operand 784 states and 849 transitions. Second operand 68 states. [2018-09-23 19:38:39,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:39,344 INFO L93 Difference]: Finished difference Result 809 states and 876 transitions. [2018-09-23 19:38:39,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-09-23 19:38:39,344 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 783 [2018-09-23 19:38:39,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:39,347 INFO L225 Difference]: With dead ends: 809 [2018-09-23 19:38:39,347 INFO L226 Difference]: Without dead ends: 807 [2018-09-23 19:38:39,347 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 783 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:38:39,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2018-09-23 19:38:39,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 796. [2018-09-23 19:38:39,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2018-09-23 19:38:39,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 862 transitions. [2018-09-23 19:38:39,978 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 862 transitions. Word has length 783 [2018-09-23 19:38:39,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:39,979 INFO L480 AbstractCegarLoop]: Abstraction has 796 states and 862 transitions. [2018-09-23 19:38:39,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-09-23 19:38:39,979 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 862 transitions. [2018-09-23 19:38:39,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2018-09-23 19:38:39,983 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:39,983 INFO L375 BasicCegarLoop]: trace histogram [660, 66, 66, 1, 1, 1] [2018-09-23 19:38:39,983 INFO L423 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:39,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:39,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1533429993, now seen corresponding path program 69 times [2018-09-23 19:38:39,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:39,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:39,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:39,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:39,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:40,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 265386 backedges. 0 proven. 261756 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2018-09-23 19:38:42,526 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:42,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:42,534 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:38:44,893 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 397 check-sat command(s) [2018-09-23 19:38:44,894 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:44,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 265386 backedges. 0 proven. 261756 refuted. 0 times theorem prover too weak. 3630 trivial. 0 not checked. [2018-09-23 19:38:45,380 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:45,380 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2018-09-23 19:38:45,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-09-23 19:38:45,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-09-23 19:38:45,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:38:45,382 INFO L87 Difference]: Start difference. First operand 796 states and 862 transitions. Second operand 69 states. [2018-09-23 19:38:46,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:46,498 INFO L93 Difference]: Finished difference Result 821 states and 889 transitions. [2018-09-23 19:38:46,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 19:38:46,498 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 795 [2018-09-23 19:38:46,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:46,501 INFO L225 Difference]: With dead ends: 821 [2018-09-23 19:38:46,501 INFO L226 Difference]: Without dead ends: 819 [2018-09-23 19:38:46,501 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 795 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:38:46,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2018-09-23 19:38:47,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 808. [2018-09-23 19:38:47,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 808 states. [2018-09-23 19:38:47,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 875 transitions. [2018-09-23 19:38:47,160 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 875 transitions. Word has length 795 [2018-09-23 19:38:47,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:47,160 INFO L480 AbstractCegarLoop]: Abstraction has 808 states and 875 transitions. [2018-09-23 19:38:47,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-09-23 19:38:47,160 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 875 transitions. [2018-09-23 19:38:47,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 808 [2018-09-23 19:38:47,165 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:47,165 INFO L375 BasicCegarLoop]: trace histogram [670, 67, 67, 1, 1, 1] [2018-09-23 19:38:47,165 INFO L423 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:47,165 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:47,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1888751713, now seen corresponding path program 70 times [2018-09-23 19:38:47,166 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:47,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:47,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:47,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:47,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 273494 backedges. 0 proven. 269809 refuted. 0 times theorem prover too weak. 3685 trivial. 0 not checked. [2018-09-23 19:38:49,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:49,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:49,369 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:38:49,806 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:38:49,806 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:49,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 273494 backedges. 0 proven. 269809 refuted. 0 times theorem prover too weak. 3685 trivial. 0 not checked. [2018-09-23 19:38:50,205 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:50,206 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2018-09-23 19:38:50,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2018-09-23 19:38:50,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2018-09-23 19:38:50,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:38:50,208 INFO L87 Difference]: Start difference. First operand 808 states and 875 transitions. Second operand 70 states. [2018-09-23 19:38:51,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:51,992 INFO L93 Difference]: Finished difference Result 833 states and 902 transitions. [2018-09-23 19:38:51,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 19:38:51,993 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 807 [2018-09-23 19:38:51,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:51,996 INFO L225 Difference]: With dead ends: 833 [2018-09-23 19:38:51,996 INFO L226 Difference]: Without dead ends: 831 [2018-09-23 19:38:51,997 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 807 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2018-09-23 19:38:51,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2018-09-23 19:38:52,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 820. [2018-09-23 19:38:52,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2018-09-23 19:38:52,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 888 transitions. [2018-09-23 19:38:52,681 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 888 transitions. Word has length 807 [2018-09-23 19:38:52,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:52,682 INFO L480 AbstractCegarLoop]: Abstraction has 820 states and 888 transitions. [2018-09-23 19:38:52,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has 70 states. [2018-09-23 19:38:52,682 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 888 transitions. [2018-09-23 19:38:52,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2018-09-23 19:38:52,686 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:52,687 INFO L375 BasicCegarLoop]: trace histogram [680, 68, 68, 1, 1, 1] [2018-09-23 19:38:52,687 INFO L423 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:52,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:52,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1800353109, now seen corresponding path program 71 times [2018-09-23 19:38:52,687 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:52,687 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:52,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:52,688 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:52,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:38:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 281724 backedges. 0 proven. 277984 refuted. 0 times theorem prover too weak. 3740 trivial. 0 not checked. [2018-09-23 19:38:54,956 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:38:54,956 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:38:54,962 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:38:57,517 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 409 check-sat command(s) [2018-09-23 19:38:57,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:38:57,530 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:38:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 281724 backedges. 0 proven. 277984 refuted. 0 times theorem prover too weak. 3740 trivial. 0 not checked. [2018-09-23 19:38:57,941 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:38:57,941 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2018-09-23 19:38:57,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-09-23 19:38:57,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-09-23 19:38:57,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:38:57,943 INFO L87 Difference]: Start difference. First operand 820 states and 888 transitions. Second operand 71 states. [2018-09-23 19:38:59,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:38:59,130 INFO L93 Difference]: Finished difference Result 845 states and 915 transitions. [2018-09-23 19:38:59,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-09-23 19:38:59,130 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 819 [2018-09-23 19:38:59,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:38:59,133 INFO L225 Difference]: With dead ends: 845 [2018-09-23 19:38:59,133 INFO L226 Difference]: Without dead ends: 843 [2018-09-23 19:38:59,134 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 888 GetRequests, 819 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2018-09-23 19:38:59,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2018-09-23 19:38:59,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 832. [2018-09-23 19:38:59,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 832 states. [2018-09-23 19:38:59,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 901 transitions. [2018-09-23 19:38:59,773 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 901 transitions. Word has length 819 [2018-09-23 19:38:59,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:38:59,774 INFO L480 AbstractCegarLoop]: Abstraction has 832 states and 901 transitions. [2018-09-23 19:38:59,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-09-23 19:38:59,774 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 901 transitions. [2018-09-23 19:38:59,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 832 [2018-09-23 19:38:59,778 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:38:59,778 INFO L375 BasicCegarLoop]: trace histogram [690, 69, 69, 1, 1, 1] [2018-09-23 19:38:59,779 INFO L423 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:38:59,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:38:59,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1822005771, now seen corresponding path program 72 times [2018-09-23 19:38:59,779 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:38:59,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:38:59,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:59,780 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:38:59,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:38:59,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 290076 backedges. 0 proven. 286281 refuted. 0 times theorem prover too weak. 3795 trivial. 0 not checked. [2018-09-23 19:39:02,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:02,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:02,370 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:39:04,933 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 411 check-sat command(s) [2018-09-23 19:39:04,933 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:04,946 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 290076 backedges. 0 proven. 286281 refuted. 0 times theorem prover too weak. 3795 trivial. 0 not checked. [2018-09-23 19:39:05,541 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:05,541 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2018-09-23 19:39:05,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2018-09-23 19:39:05,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2018-09-23 19:39:05,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:39:05,543 INFO L87 Difference]: Start difference. First operand 832 states and 901 transitions. Second operand 72 states. [2018-09-23 19:39:06,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:06,717 INFO L93 Difference]: Finished difference Result 857 states and 928 transitions. [2018-09-23 19:39:06,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-09-23 19:39:06,717 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 831 [2018-09-23 19:39:06,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:06,719 INFO L225 Difference]: With dead ends: 857 [2018-09-23 19:39:06,720 INFO L226 Difference]: Without dead ends: 855 [2018-09-23 19:39:06,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 831 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2018-09-23 19:39:06,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2018-09-23 19:39:07,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 844. [2018-09-23 19:39:07,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2018-09-23 19:39:07,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 914 transitions. [2018-09-23 19:39:07,382 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 914 transitions. Word has length 831 [2018-09-23 19:39:07,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:07,383 INFO L480 AbstractCegarLoop]: Abstraction has 844 states and 914 transitions. [2018-09-23 19:39:07,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 72 states. [2018-09-23 19:39:07,383 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 914 transitions. [2018-09-23 19:39:07,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2018-09-23 19:39:07,387 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:07,387 INFO L375 BasicCegarLoop]: trace histogram [700, 70, 70, 1, 1, 1] [2018-09-23 19:39:07,387 INFO L423 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:07,388 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:07,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1902862911, now seen corresponding path program 73 times [2018-09-23 19:39:07,388 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:07,388 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:07,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:07,389 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:07,389 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 298550 backedges. 0 proven. 294700 refuted. 0 times theorem prover too weak. 3850 trivial. 0 not checked. [2018-09-23 19:39:09,820 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:09,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:09,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:10,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 298550 backedges. 0 proven. 294700 refuted. 0 times theorem prover too weak. 3850 trivial. 0 not checked. [2018-09-23 19:39:10,769 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:10,770 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-09-23 19:39:10,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-09-23 19:39:10,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-09-23 19:39:10,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:39:10,771 INFO L87 Difference]: Start difference. First operand 844 states and 914 transitions. Second operand 73 states. [2018-09-23 19:39:12,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:12,054 INFO L93 Difference]: Finished difference Result 869 states and 941 transitions. [2018-09-23 19:39:12,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-09-23 19:39:12,054 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 843 [2018-09-23 19:39:12,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:12,056 INFO L225 Difference]: With dead ends: 869 [2018-09-23 19:39:12,056 INFO L226 Difference]: Without dead ends: 867 [2018-09-23 19:39:12,056 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 914 GetRequests, 843 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:39:12,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2018-09-23 19:39:12,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 856. [2018-09-23 19:39:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 856 states. [2018-09-23 19:39:12,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 927 transitions. [2018-09-23 19:39:12,762 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 927 transitions. Word has length 843 [2018-09-23 19:39:12,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:12,763 INFO L480 AbstractCegarLoop]: Abstraction has 856 states and 927 transitions. [2018-09-23 19:39:12,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-09-23 19:39:12,763 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 927 transitions. [2018-09-23 19:39:12,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 856 [2018-09-23 19:39:12,767 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:12,768 INFO L375 BasicCegarLoop]: trace histogram [710, 71, 71, 1, 1, 1] [2018-09-23 19:39:12,768 INFO L423 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:12,768 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:12,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1438007177, now seen corresponding path program 74 times [2018-09-23 19:39:12,768 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:12,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:12,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:12,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:39:12,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:15,274 INFO L134 CoverageAnalysis]: Checked inductivity of 307146 backedges. 0 proven. 303241 refuted. 0 times theorem prover too weak. 3905 trivial. 0 not checked. [2018-09-23 19:39:15,274 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:15,274 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:15,282 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:39:15,748 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:39:15,749 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:15,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 307146 backedges. 0 proven. 303241 refuted. 0 times theorem prover too weak. 3905 trivial. 0 not checked. [2018-09-23 19:39:16,286 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:16,286 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2018-09-23 19:39:16,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-09-23 19:39:16,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-09-23 19:39:16,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:39:16,288 INFO L87 Difference]: Start difference. First operand 856 states and 927 transitions. Second operand 74 states. [2018-09-23 19:39:17,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:17,576 INFO L93 Difference]: Finished difference Result 881 states and 954 transitions. [2018-09-23 19:39:17,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 19:39:17,577 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 855 [2018-09-23 19:39:17,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:17,579 INFO L225 Difference]: With dead ends: 881 [2018-09-23 19:39:17,579 INFO L226 Difference]: Without dead ends: 879 [2018-09-23 19:39:17,579 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 927 GetRequests, 855 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:39:17,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2018-09-23 19:39:18,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 868. [2018-09-23 19:39:18,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 868 states. [2018-09-23 19:39:18,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 940 transitions. [2018-09-23 19:39:18,293 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 940 transitions. Word has length 855 [2018-09-23 19:39:18,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:18,293 INFO L480 AbstractCegarLoop]: Abstraction has 868 states and 940 transitions. [2018-09-23 19:39:18,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-09-23 19:39:18,293 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 940 transitions. [2018-09-23 19:39:18,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2018-09-23 19:39:18,298 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:18,298 INFO L375 BasicCegarLoop]: trace histogram [720, 72, 72, 1, 1, 1] [2018-09-23 19:39:18,298 INFO L423 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:18,298 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:18,299 INFO L82 PathProgramCache]: Analyzing trace with hash 696090067, now seen corresponding path program 75 times [2018-09-23 19:39:18,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:18,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:18,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:18,299 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:18,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 315864 backedges. 0 proven. 311904 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2018-09-23 19:39:20,853 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:20,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:20,860 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:39:23,837 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 433 check-sat command(s) [2018-09-23 19:39:23,838 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:23,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 315864 backedges. 0 proven. 311904 refuted. 0 times theorem prover too weak. 3960 trivial. 0 not checked. [2018-09-23 19:39:24,301 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:24,301 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2018-09-23 19:39:24,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-09-23 19:39:24,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-09-23 19:39:24,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:39:24,303 INFO L87 Difference]: Start difference. First operand 868 states and 940 transitions. Second operand 75 states. [2018-09-23 19:39:25,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:25,571 INFO L93 Difference]: Finished difference Result 893 states and 967 transitions. [2018-09-23 19:39:25,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-09-23 19:39:25,571 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 867 [2018-09-23 19:39:25,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:25,573 INFO L225 Difference]: With dead ends: 893 [2018-09-23 19:39:25,573 INFO L226 Difference]: Without dead ends: 891 [2018-09-23 19:39:25,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 940 GetRequests, 867 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2018-09-23 19:39:25,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2018-09-23 19:39:26,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 880. [2018-09-23 19:39:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2018-09-23 19:39:26,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 953 transitions. [2018-09-23 19:39:26,298 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 953 transitions. Word has length 867 [2018-09-23 19:39:26,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:26,299 INFO L480 AbstractCegarLoop]: Abstraction has 880 states and 953 transitions. [2018-09-23 19:39:26,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-09-23 19:39:26,299 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 953 transitions. [2018-09-23 19:39:26,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 880 [2018-09-23 19:39:26,304 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:26,305 INFO L375 BasicCegarLoop]: trace histogram [730, 73, 73, 1, 1, 1] [2018-09-23 19:39:26,305 INFO L423 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:26,305 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:26,305 INFO L82 PathProgramCache]: Analyzing trace with hash 943168797, now seen corresponding path program 76 times [2018-09-23 19:39:26,306 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:26,306 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:26,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:26,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:26,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 324704 backedges. 0 proven. 320689 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2018-09-23 19:39:28,979 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:28,979 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:28,987 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:39:29,467 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:39:29,468 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:29,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 324704 backedges. 0 proven. 320689 refuted. 0 times theorem prover too weak. 4015 trivial. 0 not checked. [2018-09-23 19:39:30,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:30,048 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2018-09-23 19:39:30,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2018-09-23 19:39:30,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2018-09-23 19:39:30,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:39:30,049 INFO L87 Difference]: Start difference. First operand 880 states and 953 transitions. Second operand 76 states. [2018-09-23 19:39:31,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:31,353 INFO L93 Difference]: Finished difference Result 905 states and 980 transitions. [2018-09-23 19:39:31,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 19:39:31,353 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 879 [2018-09-23 19:39:31,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:31,355 INFO L225 Difference]: With dead ends: 905 [2018-09-23 19:39:31,355 INFO L226 Difference]: Without dead ends: 903 [2018-09-23 19:39:31,355 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 953 GetRequests, 879 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2018-09-23 19:39:31,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2018-09-23 19:39:32,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 892. [2018-09-23 19:39:32,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 892 states. [2018-09-23 19:39:32,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 966 transitions. [2018-09-23 19:39:32,105 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 966 transitions. Word has length 879 [2018-09-23 19:39:32,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:32,106 INFO L480 AbstractCegarLoop]: Abstraction has 892 states and 966 transitions. [2018-09-23 19:39:32,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 76 states. [2018-09-23 19:39:32,106 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 966 transitions. [2018-09-23 19:39:32,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 892 [2018-09-23 19:39:32,111 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:32,111 INFO L375 BasicCegarLoop]: trace histogram [740, 74, 74, 1, 1, 1] [2018-09-23 19:39:32,112 INFO L423 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:32,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:32,112 INFO L82 PathProgramCache]: Analyzing trace with hash -811917977, now seen corresponding path program 77 times [2018-09-23 19:39:32,112 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:32,112 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:32,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:32,113 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:32,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:34,721 INFO L134 CoverageAnalysis]: Checked inductivity of 333666 backedges. 0 proven. 329596 refuted. 0 times theorem prover too weak. 4070 trivial. 0 not checked. [2018-09-23 19:39:34,721 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:34,721 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:34,729 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 19:39:37,767 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 445 check-sat command(s) [2018-09-23 19:39:37,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:37,781 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 333666 backedges. 0 proven. 329596 refuted. 0 times theorem prover too weak. 4070 trivial. 0 not checked. [2018-09-23 19:39:38,263 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:38,263 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2018-09-23 19:39:38,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-09-23 19:39:38,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-09-23 19:39:38,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:39:38,264 INFO L87 Difference]: Start difference. First operand 892 states and 966 transitions. Second operand 77 states. [2018-09-23 19:39:39,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:39,584 INFO L93 Difference]: Finished difference Result 917 states and 993 transitions. [2018-09-23 19:39:39,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2018-09-23 19:39:39,585 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 891 [2018-09-23 19:39:39,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:39,586 INFO L225 Difference]: With dead ends: 917 [2018-09-23 19:39:39,587 INFO L226 Difference]: Without dead ends: 915 [2018-09-23 19:39:39,587 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 891 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2018-09-23 19:39:39,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2018-09-23 19:39:40,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 904. [2018-09-23 19:39:40,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2018-09-23 19:39:40,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 979 transitions. [2018-09-23 19:39:40,452 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 979 transitions. Word has length 891 [2018-09-23 19:39:40,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:40,453 INFO L480 AbstractCegarLoop]: Abstraction has 904 states and 979 transitions. [2018-09-23 19:39:40,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-09-23 19:39:40,453 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 979 transitions. [2018-09-23 19:39:40,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 904 [2018-09-23 19:39:40,459 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:40,459 INFO L375 BasicCegarLoop]: trace histogram [750, 75, 75, 1, 1, 1] [2018-09-23 19:39:40,460 INFO L423 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:40,460 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:40,460 INFO L82 PathProgramCache]: Analyzing trace with hash -543261007, now seen corresponding path program 78 times [2018-09-23 19:39:40,460 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:40,460 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:40,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:40,461 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:40,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:39:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 342750 backedges. 0 proven. 338625 refuted. 0 times theorem prover too weak. 4125 trivial. 0 not checked. [2018-09-23 19:39:43,550 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:39:43,550 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:39:43,557 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 19:39:46,728 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 446 check-sat command(s) [2018-09-23 19:39:46,728 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:39:46,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:39:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 342750 backedges. 0 proven. 338625 refuted. 0 times theorem prover too weak. 4125 trivial. 0 not checked. [2018-09-23 19:39:47,308 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:39:47,308 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2018-09-23 19:39:47,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2018-09-23 19:39:47,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2018-09-23 19:39:47,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:39:47,310 INFO L87 Difference]: Start difference. First operand 904 states and 979 transitions. Second operand 78 states. [2018-09-23 19:39:48,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:39:48,622 INFO L93 Difference]: Finished difference Result 929 states and 1006 transitions. [2018-09-23 19:39:48,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 19:39:48,622 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 903 [2018-09-23 19:39:48,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:39:48,624 INFO L225 Difference]: With dead ends: 929 [2018-09-23 19:39:48,624 INFO L226 Difference]: Without dead ends: 927 [2018-09-23 19:39:48,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 903 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:39:48,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2018-09-23 19:39:49,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 916. [2018-09-23 19:39:49,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 916 states. [2018-09-23 19:39:49,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 992 transitions. [2018-09-23 19:39:49,415 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 992 transitions. Word has length 903 [2018-09-23 19:39:49,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:39:49,415 INFO L480 AbstractCegarLoop]: Abstraction has 916 states and 992 transitions. [2018-09-23 19:39:49,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 78 states. [2018-09-23 19:39:49,415 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 992 transitions. [2018-09-23 19:39:49,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2018-09-23 19:39:49,420 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:39:49,421 INFO L375 BasicCegarLoop]: trace histogram [760, 76, 76, 1, 1, 1] [2018-09-23 19:39:49,421 INFO L423 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:39:49,421 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:39:49,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1703395077, now seen corresponding path program 79 times [2018-09-23 19:39:49,421 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:39:49,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:39:49,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:49,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:39:49,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:39:49,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-09-23 19:39:51,066 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:39:51,071 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:39:51,071 INFO L202 PluginConnector]: Adding new model nested1.i_4.bplTransformedIcfg_BEv2_12.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:39:51 BoogieIcfgContainer [2018-09-23 19:39:51,071 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:39:51,072 INFO L168 Benchmark]: Toolchain (without parser) took 242635.92 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -514.0 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-09-23 19:39:51,073 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 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. [2018-09-23 19:39:51,074 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.11 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. [2018-09-23 19:39:51,074 INFO L168 Benchmark]: Boogie Preprocessor took 28.00 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. [2018-09-23 19:39:51,074 INFO L168 Benchmark]: RCFGBuilder took 291.45 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. [2018-09-23 19:39:51,075 INFO L168 Benchmark]: TraceAbstraction took 242270.57 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -535.1 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. [2018-09-23 19:39:51,077 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 0.20 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 40.11 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 28.00 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 291.45 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 242270.57 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 2.0 GB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -535.1 MB). Peak memory consumption was 1.5 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 35]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 35). Cancelled while BasicCegarLoop was analyzing trace of length 916 with TraceHistMax 760, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 64 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. TIMEOUT Result, 242.1s OverallTime, 81 OverallIterations, 760 TraceHistogramMax, 52.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 318 SDtfs, 5846 SDslu, 4263 SDs, 0 SdLazy, 7420 SolverSat, 457 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37575 GetRequests, 34385 SyntacticMatches, 0 SemanticMatches, 3190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5190 ImplicationChecksByTransitivity, 81.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=916occurred in iteration=80, 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: 20.9s AutomataMinimizationTime, 80 MinimizatonAttempts, 807 StatesRemovedByMinimization, 76 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 4.2s SsaConstructionTime, 51.1s SatisfiabilityAnalysisTime, 95.8s InterpolantComputationTime, 68840 NumberOfCodeBlocks, 68669 NumberOfCodeBlocksAsserted, 8912 NumberOfCheckSat, 68682 ConstructedInterpolants, 0 QuantifiedInterpolants, 124587192 SizeOfPredicates, 78 NumberOfNonLiveVariables, 137598 ConjunctsInSsa, 3030 ConjunctsInUnsatCore, 158 InterpolantComputations, 2 PerfectInterpolantSequences, 315983/17469377 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/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_19-39-51-087.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested1.i_4.bplTransformedIcfg_BEv2_12.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_19-39-51-087.csv Completed graceful shutdown